首页 > 期刊 > 无机化学学报
栏目

  

论文
基于席夫碱配体构筑的Ln2配合物的结构、荧光性质及生物活性
辛晓艳, 陈凤姣, 李文钰, 王捷, 杨晨, 李敏, 石瑛, 王文敏
2023, 39(1): 1-12  doi: 10.11862/CJIC.2022.268
[摘要]  (97) [HTML全文] (97) [PDF 9948KB] (0)
摘要:
以多齿席夫碱配体H2L (H2L=(E)-N'-(3-乙氧基-2-羟基亚苄基)-3-羟基吡啶甲酰肼)为配体,与Ln (acac)3·2H2O (Ln=Tb、Ho、Er;acac-=乙酰丙酮根)反应,通过溶剂热法,成功得到了3例新的双核稀土配合物[Ln2(acac)2(L)2(C2H5OH)2](Ln=Tb (1)、Ho (2)、Er (3))。单晶X射线衍射分析表明:配合物1~3的结构主要由2个Ln离子、2个乙酰丙酮根(acac-)、2个L2-及2个C2H5OH组成,中心Ln离子通过2个μ2-O原子相互连接,形成一个平行四边形的Ln2O2核心。固体荧光实验测试结果表明:配合物1在室温下表现出Tb离子的荧光特征发射峰。此外,生物活性研究表明,与配体H2L和稀土离子相比较,配合物1~3具有更强的抗菌活性。采用紫外光谱法、循环伏安法、凝胶电泳法和荧光光谱法研究了配合物1~3与小牛胸腺DNA之间的相互作用,结果表明配合物主要以插入作用的方式与小牛胸腺DNA结合。
SiC表面Ni沉积超疏水膜层的形成机理
宿辉, 栾柏瑞, 李春彦
2023, 39(1): 13-22  doi: 10.11862/CJIC.2022.259
[摘要]  (90) [HTML全文] (90) [PDF 30828KB] (0)
摘要:
前期采用环境友好方法制备的改性碳化硅颗粒,经较长时间放置,发现其由亲水性转变为超疏水性,接触角为156°。为解释这一新的现象,采用扫描电子显微镜、能谱、(高分辨)透射电子显微镜、X射线光电子能谱(XPS)对原粉碳化硅、改性后碳化硅及久置碳化硅进行了测试与分析。结果显示:改性后碳化硅经较长时间放置,表面胞状颗粒增大并出现凸起物,粗糙度增加,存在类似于荷叶的微纳米结构。改性后颗粒的主要成分为Ni、Si、O,其中凸起处Ni、O元素的含量明显高于凹陷处。Ni颗粒表面出现清晰的膜层,膜层厚度为2~3 nm,但结晶度偏低。XPS测试结果显示金属镍的特征峰正向移动近4 eV,与镍的氧化态特征峰相一致,从而解释了颗粒表面形态发生细小改变,自发形成超疏水膜层的机理。
BiVO4/ZnFe2O4同型异质结光阳极的构筑及其光电催化分解水性能
樊萌萌, 文晓江, 陶紫阳, 赵强, 李晋平, 刘光
2023, 39(1): 23-31  doi: 10.11862/CJIC.2022.257
[摘要]  (84) [HTML全文] (84) [PDF 7434KB] (1)
摘要:
光生电子-空穴对的复合被认为是限制BiVO4材料光电催化转换效率的重要原因之一。基于此,通过简单的水热-煅烧方法构筑了BiVO4/ZnFe2O4同型异质结光阳极,BiVO4/ZnFe2O4复合光阳极在1.23 V (vs RHE)下的光电流密度为3.33 mA·cm-2,较纯BiVO4提升了2倍(1.20 mA·cm-2)。相关的结构及性能测试表明,BiVO4和ZnFe2O4形成了带隙错开的n-n异质结,使得光生载流子得到有效分离,更有效地参与水氧化过程,进而提高了BiVO4的光电催化水分解性能。
N缺陷g-C3N5修饰S掺杂苝酰亚胺增强可见光自芬顿苯酚氧化耦合Cr(Ⅵ)还原
徐凯旋, 亢玉龙, 贺红斌, 高晓明, 赵晨宇, 任瑞阳
2023, 39(1): 32-44  doi: 10.11862/CJIC.2022.264
[摘要]  (81) [HTML全文] (81) [PDF 17627KB] (1)
摘要:
通过静电自组装制备有机复合半导体N缺陷g-C3N5(NVs)修饰S掺杂苝酰亚胺(S-PDI)。NVs具有丰富的活性位点,而具有氨基基团的酰胺增强了S-PDI与NVs的分子间作用力。NVs质量分数30%的30% NVs/S-PDI对Cr(Ⅵ)的还原率为79.96%,对苯酚的降解率为74.40%;30% NVs/S-PDI协同氧化苯酚与还原Cr(Ⅵ)过程中,Cr(Ⅵ)的还原率为92.83%,苯酚的降解率为93.89%,即苯酚的氧化降解促进了Cr(Ⅵ)的还原,Cr(Ⅵ)的还原增强了苯酚的氧化降解。NVs/S-PDI充分利用导带的还原性能和价带的氧化性能,实现电子空穴的空间分离,协同强化光催化过程中的氧化半反应和还原半反应,同步提升光催化氧化还原性能。同时,光照产生的电子、H2O2与Cr(Ⅵ)形成一个光自芬顿反应过程,进一步促进了苯酚的氧化降解与Cr(Ⅵ)的还原去除。
共轭微孔聚合物热解制备氮、硫杂原子硬炭及其储锂性能
张庆堂, 许宗强, 舒琦琪, 连斐
2023, 39(1): 45-54  doi: 10.11862/CJIC.2022.263
[摘要]  (61) [HTML全文] (61) [PDF 18988KB] (0)
摘要:
选取溴代噻唑和三乙炔基苯为单体,利用聚合反应自下而上构建含噻唑共轭微孔聚合物(NSCMP),通过热解和KOH活化热解NSCMP制备了氮、硫杂原子硬炭(NSHC)和活化NSHC (KNSHC)。利用扫描电子显微镜、能量色散谱、氮气吸附-脱附和恒流充放电等表征2个样品的结构与电化学性能。研究表明KNSHC中N和S的质量分数分别为10.42%和2.23%,KNSHC比表面积高达2 140 m2·g-1。在0.2 A·g-1电流密度下循环500次后KNSHC和NSHC的可逆比容量分别为946.2和493.7 mAh·g-1。KNSHC的优异电化学性能归因于其独特的孔结构和氮、硫杂原子的协同作用。
锰源对尖晶石LiMn2O4高温性能的影响
刘培松, 宋利君, 黄朝连, 胡磊, 卢晓英, 江奇
2023, 39(1): 55-62  doi: 10.11862/CJIC.2022.258
[摘要]  (80) [HTML全文] (80) [PDF 9945KB] (1)
摘要:
为考察不同锰源对所制备尖晶石LiMn2O4(LMO)电化学性能的影响(特别是高温性能),采用沉淀法制备前驱体,通过不同煅烧温度制备得到最常用的锰氧化物(MnO2、Mn2O3和Mn3O4)为锰源,经相同条件制备得到LMO正极材料,通过考察所得LMO形貌及电化学性能来研究锰源与LMO电化学性能的关系。研究结果表明,相同的前驱体在不同煅烧温度下可以得到不同的锰氧化物,且各自具有不同的形貌结构。由这些锰氧化物都可以得到高纯度的LMO,但产物形貌结构以及材料中的八面体晶体含量和尺寸不同。由Mn2O3制备得到的LMO材料中的八面体晶体含量最多,且尺寸最均匀,在3种LMO中容量性能、倍率性能和循环性能最好:0.2C (1C=148 mA·g-1)下首次放电比容量为131.8 mAh·g-1;3C下还有100.4 mAh·g-1的放电比容量。其对应半电池在0.5C下循环100次后,放电比容量还有116.0 mAh·g-1,容量保持率为93.9%,电化学储能性能远远优于其他2种LMO。即使是在高温55℃下,由Mn2O3得到的LMO也表现出明显优于其他2种材料的高倍率性能和抗衰减性能。
Eu2+掺杂MgY2Al3Si2O11N青光荧光粉的制备和发光性能
李莉宇, 时秋峰, 郭海洁, 崔彩娥, 黄平, 王磊
2023, 39(1): 63-70  doi: 10.11862/CJIC.2022.271
[摘要]  (80) [HTML全文] (80) [PDF 4249KB] (0)
摘要:
采用高温固相法合成了一系列Eu2+掺杂的MgY2Al3Si2O11N (MYASON)青光荧光粉。详细探讨了不同制备方法对荧光粉的物相结构和发光强度的影响,利用X射线衍射精修和X射线光电子能谱实验证明Si4+-N3-离子对成功掺入石榴石晶格中。通过荧光光谱、寿命衰减曲线和变温光谱研究了发光性能,研究结果表明,用365 nm紫外光激发MYASON∶Eu2+荧光粉时,在青光区域呈现不对称宽带发射,峰值为490 nm,可以为紫外芯片激发的白光发光二极管有效提供青光成分。
胺醇修饰的β-二酮铕配合物对有机小分子胺的高灵敏检测
李静雅, 黄文儒, 王峰, 周妍妍
2023, 39(1): 71-79  doi: 10.11862/CJIC.2022.265
[摘要]  (99) [HTML全文] (99) [PDF 6380KB] (0)
摘要:
稀土发光传感器可用于有害的有机小分子胺的检测,然而稀土离子较大的离子半径和不稳定的配位构型,使其在固态下对有机小分子胺实现高灵敏性的发光检测具有一定的挑战。通过在单β-二酮配体上引入胺醇识别基团,使其与稀土铕离子通过配位成功构筑了具有可调控配体内电荷转移(ILCT)性质的单核稀土配合物[Eu(L)3(H2O)2](HL=(2Z)-1-(4-(双(2-羟基乙基)氨基)苯基)-4,4,4-三氟-3-羟基丁-2-烯-1-酮)。配合物的传感研究表明,[Eu(L)3(H2O)2]在弱的亲核作用下对三丙胺等有机小分子胺表现出明显的发光增强响应。
MoO2@氮掺杂碳复合物的制备及其降解有机污染物
曹诗雨, 陈斌杰, 郁非繁, 徐象威, 姚玉元
2023, 39(1): 80-90  doi: 10.11862/CJIC.2022.255
[摘要]  (74) [HTML全文] (74) [PDF 23258KB] (2)
摘要:
以多巴胺、钼酸铵、碳酸氢铵为原料,通过一步煅烧法合成一种MoO2@氮掺杂碳复合物(MoO2@CN),并利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、拉曼光谱(Raman)等对其进行表征。以卡马西平(CBZ)为目标污染物,以过一硫酸氢钾(PMS)为氧化剂,在温度为25℃、pH为6.5的条件下,MoO2@CN/PMS在12 min内对CBZ的去除率达99.2%,与商用MoO2相比,其表观速率常数kobs(0.393 min-1)是商用MoO2(0.016 4 min-1)的24.0倍,这主要是由于制备的MoO2@CN比商用MoO2具有更好的电子传输能力以及更大的比表面积。MoO2@CN在pH为2.5~10.5时均能有效降解CBZ,而且对大多数染料、酚类化合物、抗生素等多种污染物均具有良好的降解性能。此外,MoO2@CN/PMS在60 min内对CBZ的总有机碳(TOC)去除率高达74.0%。电子顺磁共振波谱(EPR)和自由基猝灭实验显示MoO2@CN/PMS体系中主要起作用是硫酸根自由基(SO4·-)和羟基自由基(·OH)。更有意思的是,在Fe2+/PMS体系加入MoO2@CN后,其催化降解CBZ的性能显著增强,kobs(1.25 min-1)是单独Fe2+/PMS体系(0.079 7 min-1)的15.7倍,这主要归因于MoO2@CN的引入加快了Fe3+到Fe2+的转变,导致更多·OH的生成。
两步变温晶种法制备丝光沸石膜及其渗透汽化乙酸脱水性能
王佳轩, 李良清, 马磊, 吕金印, 杨建华, 鲁金明
2023, 39(1): 91-97  doi: 10.11862/CJIC.2022.270
[摘要]  (64) [HTML全文] (64) [PDF 11451KB] (0)
摘要:
在水热晶种法基础上采用两步变温晶化以高水硅比(nH2O/nSiO2)稀溶液配方为合成液,研制用于渗透汽化(PV)乙酸脱水的丝光沸石膜(MOR膜),考察了变温晶化各段时间、水硅比与氟离子对MOR膜的形貌与分离性能的影响规律。结果表明:高温段晶化时间、水硅比与氟离子对MOR膜的形貌、结晶度和膜层厚度产生显著影响,并影响MOR膜渗透气化分离性能;在高温段(150℃)和低温段(120℃)的晶化时间分别为18和6 h,在水硅比为60且含氟离子体系中所制备的MOR膜的性能最佳,其对质量分数50%的乙酸水溶液的渗透通量和分离系数分别为1.45 kg·m-2·h-1和1 008。
PO43-掺杂Bi2O2CO3/Bi0的制备及其可见光催化性能
马珑珑, 秦立波, 田亚洋, 秦鹂, 杨志, 杨超
2023, 39(1): 98-108  doi: 10.11862/CJIC.2022.281
[摘要]  (79) [HTML全文] (79) [PDF 71380KB] (1)
摘要:
构建氧空位以及附着金属单质Bi (Bi0)是增强半导体材料光吸收性能、促进半导体光生载流子分离的有效方法。通过简单的共沉淀法及氢气热还原成功制备了PO43-掺杂Bi2O2CO3附着Bi0(Bi-P-BOC)的可见光催化剂,并对其在可见光下催化降解氧氟沙星(OFX)的性能及机理进行了研究。材料表征结果表明BOC随着PO43-的均匀掺杂,可见光吸收能力增强,表面缺陷增多,比表面积增大。而随着氢气热还原,BOC表面形成Bi0的同时也原位构建了大量的氧空位。可见光催化性能测试表明,Bi-P-BOC可以在180 min内降解约85%的OFX,降解速率为0.013 0 min-1,是BOC降解速率的8倍。Bi-P-BOC光催化降解机理表明其具有更好的可见光吸收能力,Bi0以及氧空位的存在促进了光生载流子的分离,h+是其光催化降解过程中的主要的活性氧物种(ROS),此外,1O2和·O2-也对降解有一定贡献。
Se掺杂WO3·0.5H2O/g-C3N4光电催化剂的析氢反应性能
崔慧娜, 董文斌, 廖港丽, 赵震, 姚垚
2023, 39(1): 109-116  doi: 10.11862/CJIC.2022.261
[摘要]  (77) [HTML全文] (77) [PDF 15123KB] (2)
摘要:
以二氰二胺、硒粉和钨酸钠为前驱体,采用一锅法成功制备出Se掺杂WO3·0.5H2O/g-C3N4(Se/WCN)催化剂。并采用X射线衍射仪(XRD)、场发射扫描电子显微镜(FE-SEM)和X射线光电子能谱(XPS)对样品的物相结构、形貌及化学组成进行表征。与原始的WO3和g-C3N4相比,Se/WCN催化剂的起始电位降到了-0.75 V (vs RHE),电流密度高达70 mA·cm-2,表现出更高的电催化活性。而光照后,Se/WCN的催化性能进一步提升,起始电位从-0.75 V (vs RHE)降至-0.65 V (vs RHE),电荷转移电阻由371.4 Ω减小到310.0 Ω。
菲咯啉与1-萘甲酸配体共同构筑的多核Ca(Ⅱ)、双核Mn(Ⅱ)配合物的合成、结构及性质
杨婷英, 郭丹, 胡宇琼, 易思佳, 谷淑琪, 贺霞, 朱小明, 张复兴
2023, 39(1): 117-126  doi: 10.11862/CJIC.2022.282
[摘要]  (41) [HTML全文] (41) [PDF 5128KB] (0)
摘要:
设计、合成了2种配合物:[Ca (Phen)(Nap)2]n(1)和[Mn2(Phen)2(Nap)4(H2O)](2)(Phen=菲咯啉,HNap=1-萘甲酸)。通过红外光谱、元素分析、X射线单晶衍射和热重对其进行了结构表征。测定了配合物的激发光谱、发射光谱,以及配合物对人肺癌细胞(NCI-H460)、人乳腺癌细胞(MCF-7)、人肝癌细胞(HepG2)的体外抑制活性;利用紫外吸收光谱、荧光分光光度法研究了配合物与小牛胸腺DNA的相互作用。结果表明:配合物12的激发光谱和发射光谱具有很好的镜像关系,且配合物2的斯托克斯位移大于配合物1;配合物对3种癌细胞都有较好的抑制作用,但是2更优于1;配合物12与小牛胸腺DNA以静电作用发生沟面结合,结合常数分别为5.83×103和6.46×103 L·mol-1
无模板电化学沉积法制备多孔WO3·2H2O薄膜及其电致变色性能
宋艳玲, 张启源, 姚爱华
2023, 39(1): 127-134  doi: 10.11862/CJIC.2022.260
[摘要]  (77) [HTML全文] (77) [PDF 16344KB] (1)
摘要:
二水合氧化钨(WO3·2H2O)因其独特的层状结构且富含层间结构水,与无水WO3相比显示出更加优异的电致变色性能。我们采用简单、无模板的阴极电化学沉积方法,成功在氧化铟锡(ITO)导电玻璃基底上制备了WO3·2H2O薄膜。通过改变电沉积液中过氧化氢(H2O2)的加入量优化沉积液的成分,获得了具有纳米多孔结构的薄膜。由此制备的WO3·2H2O薄膜显示出大的光学对比度(633 nm处的光学对比度大于90%)、快速的响应速度(着色、褪色时间均小于10 s),以及良好的循环稳定性(经10 000次循环后,光学对比度仍保持在90%左右)。
Articles
Ternary lanthanide complexes of 3-((4, 6-dimethyl-2-pyrimidinyl)thio)-propanoic acid and 1, 10-phenanthroline: Crystal structure and photoluminescent property
Shuai LAN, Yu ZHANG, Jie REN, Si-Bo SHEN, Lei CAO, Dan-Dan JIA, Dong-Jun WANG
2023, 39(1): 135-140  doi: 10.11862/CJIC.2022.276
[摘要]  (67) [HTML全文] (67) [PDF 1631KB] (0)
摘要:
Two ternary lanthanide complexes, [Eu(L)3(Phen)]2·2H2O (1) and [Tb(L)3(Phen)]2·2H2O (2), based on 3-((4, 6-dimethyl-2-pyrimidinyl)thio)-propanoic acid (HL) and 1, 10-phenanthroline (Phen) were prepared and structurally characterized. Single-crystal X-ray diffraction analyses reveal that they are isostructural. Two lanthanide ions (Ln) are bridged by four carboxylate ligands. The rest two carboxylate ligands and Phen coordinate with Ln with bidentate chelating mode, forming the dimeric arrangement. The coordination number of Ln is nine with a distorted mono-capped square antiprismatic coordination polyhedron. The solid-state photoluminescent measurements suggest that both complexes showcase the characteristic emission bands of the metal center.
Synthesis, crystal structure, and anticancer activity of a polypyridyl binuclear monofunctional platinum(Ⅱ) complex
Xun-Yi LI, Yu-Jing WANG, Zi-Mo ZHOU, Xiao FANG, Qing-Qing WANG, Mei-Chun HU, Xiao-Song YANG, Xiao-Bo WANG
2023, 39(1): 141-149  doi: 10.11862/CJIC.2022.272
[摘要]  (94) [HTML全文] (94) [PDF 3440KB] (0)
摘要:
A binuclear monofunctional platinum(Ⅱ) complex, [Pt2(BPA-TPA)Cl2]Cl2 (Pt2-BPA-TPA), containing polypyridyl ligand 2, 6-bis((bis(pyridin-2-ylmethyl)amino)methyl)pyridine was synthesized and characterized by nuclear magnetic resonance and high-resolution mass spectroscopy. In addition, the structure of Pt2-BPA-TPA was determined by X-ray single-crystal diffraction. Agarose gel electrophoresis experiments were used to demonstrate the efficient pBR322 DNA-cleaving activity of Pt2-BPA-TPA at a low concentration of 10 μmol·L-1. In CCK-8 (cell counting kit-8) cytotoxicity studies using the A549 human lung cancer cell line, Pt2-BPA-TPA demonstrated enhanced anticancer activity compared with cisplatin. Mechanistic studies provided evidence that Pt2-BPA-TPA induces apoptosis via triggering DNA damage and upregulating downstream cellular signaling cascades of p21 and cleaved-caspase-3.
First-principles study on electronic structure and optical properties of Lu-doped AlNLu
Rui-Liang ZHANG, Sheng-Shang LU, Qing-Quan XIAO, Quan XIE
2023, 39(1): 150-158  doi: 10.11862/CJIC.2022.280
[摘要]  (70) [HTML全文] (70) [PDF 6188KB] (0)
摘要:
To explore the potential applications of AlN in optoelectronic devices, the electronic structure and optical properties of AlN with different Lu doping concentrations (denoted as Al1-xLuxN, where x is the atomic fraction of Lu) were calculated by first-principles. The results show that the supercell volume of Al1-xLuxN increases with the increase of Lu doping concentration, while the bandgap does the opposite. The static dielectric constant of Al1-xLuxN increases in the low-energy region with the increase of Lu doping concentration. As Lu doping concentration increases, the peak intensity of reflectivity, refractive index, and absorption coefficient decrease, and the peaks shift to lower energy. The energy-loss spectra of Al1-xLuxN exhibit obvious plasma oscillation features, and the peaks are lower than that of the intrinsic AlN. The photoconductivity of Al1-xLuxN increases sharply in the low-energy region with the increase of energy.
Synthesis, crystal structure, and properties of manganese/cobalt complexes based on 2,5-dibromoterephthalic acid ligands
Rui-Qin HUANG, Zheng LIU, Sheng WANG, Cai-Li YU, Run-Zhi WEI, Qun TANG
2023, 39(1): 159-167  doi: 10.11862/CJIC.2022.277
[摘要]  (58) [HTML全文] (58) [PDF 10749KB] (0)
摘要:
The organic substance 2,5-dibromoterephthalic acid (H2L1) was used as the primary ligand and 2,2'-bipyridine (L2) and 1,10-phenanthroline (L3) as the secondary ligands, respectively, and reacted with manganese sulphate monohydrate and cobalt nitrate hexahydrate by the solvothermal method to give complexes [Mn2(L1)2(L2)2 (H2O)2]n (1) and [Co2(L1)2(L3)2(H2O)2]n (2). The two complexes were investigated analytically by such as single-crystal X-ray diffraction, IR spectroscopy, thermogravimetric analysis, etc. The results show that complex 1 is composed of Mn2+ coordination linking L12- and L2 to form an infinitely extended 2D network-like structure, with the layers forming a 3D network-like structure under intermolecular hydrogen bonding and π-π stacking. Complex 2 consists of Co2+ ligated to L12- and L3 to form an infinitely extended 2D network, with the layers stacked in a 3D network by intermolecular hydrogen bonding and π -π stacking. Both complexes had good fluorescence property and thermal stability, and the maximum emission wavelengths of complexes 1 and 2 were 355 and 365 nm, respectively.
Two cadmium-based coordination polymers with tripodal carboxylate and imidazolyl ligands: Syntheses, structures, and fluorescent properties
Long TANG, Lu-Yuan CHEN, Xiang-Yang HOU, Xiao WANG, Ji-Jiang WANG
2023, 39(1): 168-180  doi: 10.11862/CJIC.2022.273
[摘要]  (112) [HTML全文] (112) [PDF 17875KB] (0)
摘要:
Two cadmium-based coordination polymers [Cd(Htatb) (1,4-bimb)] ·H2O (1) and [Cd(Htatb) (1,4-bib) (H2O)]·DMF (2) (H3tatb=4, 4', 4″-s-triazine-2,4,6-tribenzoic acid, 1,4-bimb=1,4-bis(imidazole-1-ylmethyl) benzene, 1,4-bib=1,4-bis(1-imidazoly) benzene) were synthesized by hydrothermal reactions and characterized by single-crystal X-ray diffraction, thermogravimetric analyses, IR spectroscopy, elemental analysis, etc. 1 displays a 2D layer structure, further these layers are joined by O—H⋯O hydrogen bonding to generate a four-fold interpenetrating 3D architecture. 2 shows a 2D layer structure, further joined through O—H⋯O hydrogen bonding to produce a two-fold interpenetrating 3D architecture. Complexes 1 and 2 had fluorescent properties. 1 was highly selective and sensitive towards nitrobenzene and Fe3+ ion through different detection mechanisms, while CP 2 was highly selective and sensitive towards 2,4,6-trinitrophenol and CrO42- ion.
Syntheses of two Mg-based metal-organic frameworks by a coordination competitive strategy and the selective CO2 capture
Yu-Ao DONG, Zhe FENG, Dun-Ru ZHU
2023, 39(1): 181-190  doi: 10.11862/CJIC.2022.278
[摘要]  (91) [HTML全文] (91) [PDF 13012KB] (4)
摘要:
Two Mg-based metal-organic frameworks (MOFs) were prepared using a coordination competition strategy. Under acidic conditions, the reaction of Mg(Ⅱ) ions with formic acid generated from the thermal decomposition of N, N-dimethylformamide (DMF) formed a 3D formate Mg-MOF: [Mg3(HCO2)6]·DMF (1). However, under the same conditions but with a competing ligand 1,1'∶3',1″-terphenyl-3,3″,5, 5″-tetracarboxylic acid (H4L), formic acid was no longer involved in the coordination, resulting in a new 3D Mg-MOF: [Mg2(L) (H2O)3]·2H2O·2CH3CN·DMF (2). Single-crystal X-ray analysis revealed that 1 possesses [Mg4@Mg2] tetrahedral building units that form a dia topological network with a 1D channel size of 0.44 nm. In contrast, 2 has a unique [Mg2] binuclear cluster to build a sra topology network after bridging the 4-connected L4- linker. Interestingly, a dumbbell-shaped pore with a length of 1.42 nm is observed along the a-axis in 2. Gas adsorption studies reveal that 1 had a significantly accessible inner surface with a surface area of 342 m2·g-1. However, after solvent removal, 2 could not retain the original porous character. Featuring good water stability, 1 exhibited a type-Ⅰ CO2 adsorption isotherm with quick uptake at low pressure, and up to 14.5% of the sample weight at 298 K and 2 000 kPa. Ideal adsorption solution theory (IAST) and adsorption heat calculations show that 1 has a good ability for selective CO2 capture from CH4 contained mixture.

  

综述
锂离子电池用钴基氧化物的结构设计及本征活性调控的研究进展
王雄, 王睿, 康巧玲, 李冬云, 徐扬, 葛洪良, 高峰, 陆轻铱
2022, 38(9): 1673-1689  doi: 10.11862/CJIC.2022.179
[摘要]  (305) [HTML全文] (305) [PDF 11020KB] (305)
摘要:
锂离子电池的商业石墨负极材料的容量已经接近理论值,限制了动力电池的发展,开发容量高、稳定性好、循环寿命长和倍率性能优良的新型负极材料显得尤为重要。钴基氧化物材料由于其具有较高的比容量,是锂离子电池的理想负极材料之一。本文分别从结构设计和化学成分调控2个方面,结合本课题组近年来的研究及国内外重要文献综述了钴基氧化物作为锂离子电池负极材料的研究进展。在结构设计方面,通过构建一维结构、二维结构、三维结构、空心结构、碳材料支撑结构以及异质结构来增加钴基氧化物的反应活性位点数量;而在化学成分调控方面则通过引入无定型结构、非金属杂原子掺杂、金属杂原子掺杂、构筑高熵氧化物来提高钴基氧化物的本征活性,从而提高钴基氧化物的锂离子电池性能。最后,对钴基氧化物在锂离子电池领域未来的发展进行了展望。
铁(Ⅱ)配位聚合物电致变色材料研究进展
束敏, 刘海涛, 彭胜, 武志荣, 张蕤, 李峰, 刘建
2022, 38(9): 1690-1706  doi: 10.11862/CJIC.2022.182
[摘要]  (346) [HTML全文] (346) [PDF 7844KB] (346)
摘要:
电致变色是一种响应外部电刺激而发生颜色变化的现象,材料可以在不同的氧化还原状态之间进行可逆切换,从而在可见光或近红外区域产生新的吸收带。迄今为止,电致变色材料主要包括过渡金属氧化物、过渡金属配位聚合物、紫罗精、有机共轭聚合物等。过渡金属配位聚合物类电致变色材料兼具无机材料和有机材料的优点,具有广泛的应用前景。铁配位聚合物具有良好的氧化还原性质和丰富的电子跃迁,是一类性能优异的电致变色材料。本文综述了铁金属配位聚合物类电致变色材料的研究进展,主要从有机配体的臂形、种类和间隔基团等方面进行分类阐述。
论文
零维/二维MXene复合膜的制备及其超级电容器性能
王晨, 刘启航, 戚晨阳, 王琮钰, 赵晓莉, 杨晓伟
2022, 38(9): 1707-1715  doi: 10.11862/CJIC.2022.178
[摘要]  (290) [HTML全文] (290) [PDF 4794KB] (290)
摘要:
采用水热法制备了0D/2D复合Ti3C2Tx MXene,利用X射线衍射、动态光散射和荧光光谱表征了其结构与形貌,结果表明形成了量子点吸附于纳米片的Ti3C2Tx复合结构(QDT)。相比未引入量子点的Ti3C2Tx,由QDT组装得到的自支撑膜电极的电化学性能有了显著提高:在三电极体系中,扫速为5 mV·s-1时,比电容为338 F·g-1,当扫速达到2 000 mV·s-1,电容保持率达到46%;在两电极体系中,0.5 A·g-1时的比电容达到216 F·g-1,10 000次循环后电容保持率为87%。以上性能可归结于:量子点提供了更多的离子吸附位点,且纳米片尺寸减小,缩短了离子传输路径。
Br掺杂Bi2WO6微球的制备及其光催化性能
周鑫, 张志, 陈飘, 杨水金, 杨赟
2022, 38(9): 1716-1728  doi: 10.11862/CJIC.2022.177
[摘要]  (247) [HTML全文] (247) [PDF 7072KB] (247)
摘要:
以五水合硝酸铋和二水合钨酸钠为原料,以十六烷基三甲基溴化铵(CTAB)为溴源,制备Br掺杂Bi2WO6,通过调节CTAB的含量,利用水热法制备了Br掺杂量不同的Bi2WO6催化剂。以抗生素环丙沙星、诺氟沙星作为污染物,测试Br掺杂Bi2WO6催化剂的光催化性能。结果表明,2% 掺杂量(物质的量分数)的Bi2WO6相比于Bi2WO6的光催化降解性能最好。此外,通过X射线粉末衍射、红外光谱、扫描电镜、荧光光谱、X射线光电子能谱和拉曼光谱等一系列表征,对Br掺杂后催化剂的物相组成、微观形貌、光生电荷分离率和光学性质等进行分析。最后进行了自由基捕获实验并提出了可能的光催化机理。
表面硫化和磷化提升钼酸镍的析氢性能
姜仁政, 常峻华, 高颖, 张金凤, 李孟江, 谢英鹏
2022, 38(9): 1729-1738  doi: 10.11862/CJIC.2022.172
[摘要]  (335) [HTML全文] (335) [PDF 5776KB] (335)
摘要:
首先通过水热过程在泡沫镍(NF)上生长出钼酸镍纳米棒阵列(NMO/NF),再依次利用水热硫化和气相磷化法改性钼酸镍纳米棒阵列获得三维自支撑析氢电催化剂(PS-NMO/NF)。研究表明,硫化作用诱导钼酸镍纳米棒阵列向类珊瑚球结构转变并形成具有高电化学活性表面积的无定形硫化物壳层,显著提高钼酸镍析氢反应(HER)活性。进一步磷化处理,表面形成的无定形磷酸盐与硫化物形成丰富的异质界面,促进了电子转移,进一步提升了电极的HER性能。在1 mol·L-1 KOH电解液中,电流密度为10 mA·cm-2时,PS-NMO/NF所对应的析氢过电势为93 mV;100 mA·cm-2的电流密度所对应的析氢过电势仅为180 mV,Tafel斜率为67 mV·dec-1,而且在20 h内可稳定运行,无明显衰减。
近红外光热转换剂氧缺陷二氧化钼的制备及其在光热治疗中的应用
王曾学, 刘艳, 赵盼, 张训迪, 阳一鸣, 孙鹏, 张秀云, 冯玉, 郑婷婷, 陈辰, 李伟
2022, 38(9): 1739-1751  doi: 10.11862/CJIC.2022.195
[摘要]  (252) [HTML全文] (252) [PDF 7823KB] (252)
摘要:
通过水热合成法,以五氯化钼(MoCl5)为钼源,聚乙烯吡咯烷酮(PVP)为结构导向剂和还原剂,制备了二氧化钼(MoO2)纳米颗粒,对纳米材料进行X射线粉末衍射(XRD)、透射电镜(TEM)、紫外可见近红外(UV-Vis-NIR)吸收光谱、X射线光电子能谱(XPS)、电子自旋共振谱(EPR)等表征,结果表明制备的MoO2纳米颗粒粒度约18 nm,粒度均匀,具有丰富的氧缺陷,在650~1 100 nm的近红外区具有良好的光吸收能力。光热测试表明该材料100 μg·mL-1的水溶液10 min内升温达31.5 ℃,光热转换率高达67.9%,并且具有优异的光热稳定性。细胞毒性实验表明低剂量的该纳米材料对细胞几乎没有毒性,且对肝癌细胞的光热杀伤效果明显。
双金属有机骨架衍生的Fe-CrSe/C负极材料制备及储锂性能
陈修栋, 简佳琴, 严平, 刘培芳, 曹小华, 刘金杭
2022, 38(9): 1752-1758  doi: 10.11862/CJIC.2022.198
[摘要]  (430) [HTML全文] (430) [PDF 4722KB] (430)
摘要:
为了开发电化学性能优异的新型金属有机骨架基衍生材料,以对苯二甲酸、三氯化铬和九水合硝酸铁作为原料,通过微波法合成了双金属有机骨架材料(Fe-Cr-MOF)。在氮气保护下,对Fe-Cr-MOF进行高温硒化得到纳米颗粒状Fe-CrSe/C复合材料,用作锂离子电池负极。结果表明,在100 mA·g-1的电流密度下,Fe-CrSe/C电极的首圈可逆比容量达到958.4 mAh·g-1,循环150圈后比容量还能维持891.6 mAh·g-1
Fe3O4/MAl水滑石(M=Zn、Co、Ni)复合物光催化降解亚甲基蓝的性能、动力学与机理
倪梯铜, 孟跃, 青木功荘, 姚屹洋, 唐浩东, 陈爱民, 夏盛杰
2022, 38(9): 1759-1770  doi: 10.11862/CJIC.2022.171
[摘要]  (216) [HTML全文] (216) [PDF 8437KB] (216)
摘要:
基于低成本、无毒害、光吸收性强的四氧化三铁(Fe3O4)和大比表面、高稳定性的水滑石(LDHs),制备了Fe3O4@MAl-LDHs (M=Zn、Co、Ni)复合物并用于典型偶氮染料亚甲基蓝的光催化降解。通过X射线粉末衍射(XRD)、紫外可见(UV-Vis)吸收光谱、扫描电子显微镜(SEM)、透射电子显微镜(TEM)以及N2吸附-脱附测试表征了复合材料的组成与结构。光催化实验表明,最佳反应条件为催化剂用量50 mg、光照强度500 W、pH=9、反应温度40 ℃,此时,Fe3O4@MAl-LDHs复合材料对亚甲基蓝的降解率从LDHs的23.2% 大幅提升到87.0%。LDHs对亚甲基蓝的降解主要来自·OH,而Fe3O4@CoAl-LDHs光降解活性的贡献主要由·OH和空穴提供。此外,LDHs和Fe3O4@CoAl-LDHs的电化学性质也存在较大差异。
含共轭三烯吡啶配体的配位聚合物的合成、结构及荧光性质
王鑫, 王梦凡, 张敏杰, 曹晨, 牛政, 郎建平
2022, 38(9): 1771-1780  doi: 10.11862/CJIC.2022.197
[摘要]  (224) [HTML全文] (224) [PDF 3472KB] (224)
摘要:
将1,6-双(4-吡啶基)-1,3,5-己三烯(bphte)和镉盐分别与2种羧酸配体(2,5-二呋喃二甲酸(2,5-H2FDC)及1,3,5-均苯三甲酸(1,3,5-H3BTC))进行溶剂热反应,得到2个配位聚合物:[Cd(2,5-FDC)(bphte)(H2O)]n (1)和[Cd(1,3,5-HBTC)(bphte)]n (2)。对配合物12分别进行了元素分析、红外光谱、单晶X射线衍射、粉末X射线衍射和热重分析表征。配位聚合物1具有spl拓扑结构的三维互穿超分子框架,而配合物2是由bphte配体交叉连接一维链[Cd2(1,3,5-HBTC)2]n形成的三维结构。配合物12在固态时表现出不同的荧光性质。配合物2遇到水溶液中Fe3+会发生荧光猝灭,因此以其作为荧光探针对水溶液中Fe3+进行了选择性荧光检测,它对Fe3+的检测限可达到0.013 μmol·L-1。这种荧光猝灭过程可归因于Fe3+离子的吸收带与配合物2的激发带之间存在部分重叠。
MFI沸石纳米片及b轴取向MFI沸石薄膜的制备
宋文森, HammadSaulat, 颜韬, 吕金印, 杨建华, 鲁金明, 张艳
2022, 38(9): 1781-1789  doi: 10.11862/CJIC.2022.159
[摘要]  (317) [HTML全文] (317) [PDF 3369KB] (317)
摘要:
我们通过自下而上(bottom-up)的方法制备了高宽深比、高结晶度的b轴方向上超薄的MFI沸石纳米片,为制备b轴取向MFI沸石薄膜提供了基础。采用滑动涂覆法(slip coating method)在玻璃片载体上制备了厚度约为100 nm的b轴取向MFI纳米片晶种层。采用无模板剂二次生长法,抑制晶种层面外孪晶生长,实现了晶种层的面内外延生长。在合成体系的nSiO2nNa2OnC2H5OHnH2O=1∶0.03∶1.3∶0.89、晶化时间48 h、晶化温度180 ℃时,制备了厚度约为200 nm的连续致密的b轴取向MFI沸石膜,与基于四丙基氢氧化铵(TPAOH)的常规合成溶液水热二次生长制备的MFI沸石膜相比,厚度降低了90%,并且保持了晶种层的b轴取向性。
Articles
Synthesis, Crystal Structures, and DNA-Binding Properties of Cd(Ⅱ)/Fe(Ⅲ) Complexes with 4-Fluorophenyl-N-(quinolin-2-ylmethylene)thiosemicarbazide
Xiao-Hong LI, Xian-Wei WU, Yuan WANG, Wei-Na WU
2022, 38(9): 1790-1798  doi: 10.11862/CJIC.2022.176
[摘要]  (169) [HTML全文] (169) [PDF 3308KB] (169)
摘要:
Two complexes [Cd2(L)2(NO3)2] (1) and [Fe(L)2]NO3·3CH3OH (2), as well as (H2L)NO3 (HL=4-fluorophenyl-N-(quinolin-2-ylmethylene)thiosemicarbazide) have been synthesized and structurally determined by single-crystal X-ray diffraction, elemental analysis, and IR. The results show that 1 is a centrosymmetry binuclear complex, in which each central Cd(Ⅱ) ion is coordinated by one independent anionic ligand L- with a [N2S] donor set, one bidentate nitrate anion, and another μ2-bridged S atom from the adjacent thiosemicarbazone, thus providing a distorted octahedron geometry. The Fe(Ⅲ) ion in complex 2 displays the same coordination geometry as the Cd(Ⅱ) ion in 1, while is surrounded by two tridentate L- ligands. The fluorescence spectra, the absorption spectra, and the viscosity measurements indicate that complex 2 could effectively bind with ct-DNA through intercalation mode, while HL and complex 1 might interact with ct-DNA by outside groove binding mode, and the binding affinity of complex 2 with ct-DNA was stronger than those of HL and complex 1. In addition, the results of cytotoxicity experiments showed that complex 2 had the strongest ability to inhibit the proliferation of HeLa tumor cells among the three compounds.
Semiconductive Ni-MOFs Based on 5-(Hydroxymethyl) Isophthalic Acid and Imidazole Derivatives: Synthesis, Crystal Structures, and Photocatalytic Properties
Zhong-Xuan XU, Ming-Feng SHI, Xu-Ling BAI, Ting-Ting YUAN
2022, 38(9): 1799-1807  doi: 10.11862/CJIC.2022.175
[摘要]  (157) [HTML全文] (157) [PDF 4417KB] (157)
摘要:
Two complexes {[Ni(HIPA) (2, 5-DPBI)1.5(H2O)]·2.25H2O}n (1) and [Ni(HIPA) (2, 5-DPBMI) (H2O)]n (2) (H2HIPA=5-(hydroxymethyl) isophthalic acid, 2, 5-DPBI=1, 1'-(2, 5-dimethyl-1, 4-phenylene)bis(1H-imidazole), 2, 5-DPBMI=1, 1'-(2, 5-dimethyl-1, 4 -phenylene)bis(4-methyl-1H-imidazole)) were synthesized via hydrothermal method. Structural analysis reveals that Ni(Ⅱ) centers have different coordination environments in the existence of different imidazole ligands. As a result, complex 1 possesses a 5-connected framework with the topological symbol of (42.66.82), while complex 2 shows a 4-connected framework with dia net. The powder X -ray diffraction further firms that complexes 1 and 2 are very stable not only in a normal organic solvent but also in water under UV light. Moreover, the UV-Vis spectra, Mott-Schottky measurements, and electrochemical impedance spectroscopy (EIS) demonstrate that complex 1 and 2 are typical n-type semiconductors with low resistance in charge transportation. Finally, photocatalytic tests confirm that complexes 1 and 2 have catalytic activity for the degradation of methylene blue.
Synthesis, Crystal Structure, and Catalytic Performance of a Cd(Ⅱ) Complex Based on 3-Carboxyl-5-ammino-1, 2, 4-triazole
Xue-Zhi GAO, Huan SONG, Bing LI, Rui WANG, Xiao-Shuang ZHU, Xiao-Yan TIAN
2022, 38(9): 1808-1816  doi: 10.11862/CJIC.2022.193
[摘要]  (168) [HTML全文] (168) [PDF 1833KB] (168)
摘要:
Triazole -derived energetic complexes have paid significant attention in the field of energetic materials. An energetic complex [Cd(Hatzc)2(H2O)] (LH1) (H2atzc=3-carboxyl-5-amino-1, 2, 4-triazole) was synthesized and fully characterized by single crystal X-ray diffraction, elemental analysis, infrared spectral analysis, and thermogravimetric analysis. LH1 belongs to the monoclinic system, space group P21/n. The structural analyses illustrate that LH1 exhibits a 1D chain, which is linked by hydrogen-bonding interactions to give a 3D supramolecular architecture. Complex LH1 had high detonation velocity (D=10.4 km·s-1), detonation pressure (p =55.2 GPa), energy of detonation (16.51 kJ·g-1), and density (2.363 g·cm-3), which were superior to most of the energetic compounds. The impact sensitivity (> 40 J) and friction sensitivity (> 360 N) reveal that LH1 is less sensitive to impact and friction. The results of the catalytic thermal decomposition of ammonium perchlorate (AP) show that LH1 decreased the higher thermal decomposition temperature of AP by 38 ℃ and increased the exothermic quantity of decomposition by 0.46 kJ·g-1 in a short time, which showed a good catalytic effect on the thermal decomposition of AP.
An Interpenetrated Anionic In(Ⅲ) Metal-Organic Framework for Selective Sensing of Fe3+ in Water
Alamgir, Yan-Long ZHAO, Talha Khalid, Ya-Bo XIE, Lu WANG, Lin-Hua XIE, Xin ZHANG, Jian-Rong LI
2022, 38(9): 1817-1824  doi: 10.11862/CJIC.2022.174
[摘要]  (167) [HTML全文] (167) [PDF 3283KB] (167)
摘要:
As an emerging type of porous material, metal-organic frameworks (MOFs) have been developed as sensors for monitoring environmental pollutants in water. It is of high significance to develop fluorescent MOFs with simple precursors for selective detection of toxic Fe3+ ions. In this work, we present a water-stable two-fold interpenetrated indium-based metal-organic framework (NH2Me2)[In(fdc)2]·2H2O named BUT-205 (BUT stands for Beijing University of Technology, H2fdc=furan -2, 5-dicarboxylic acid) constructed from a biomass-derived ligand. BUT-205 has been structurally characterized by single-crystal X-ray diffraction. BUT-205 was an efficient sensor for Fe3+ ions in water with high sensitivity and selectivity. The limit of detection (LOD) was calculated to be 1.3 μmol·L-1 being lower than the US-EPA (U. S. Environmental Protection Agency) standard (15.7 μmol·L-1) in drinking water. Furthermore, BUT-205 could be recycled and used for at least four cycles.
Three Multiple-Responsive Complexes Based on a Carboxybenzyl Viologen Ligand
Jin-Jian IU, Na LIU, Yi-Wei LU
2022, 38(9): 1825-1833  doi: 10.11862/CJIC.2022.184
[摘要]  (165) [HTML全文] (165) [PDF 2839KB] (165)
摘要:
A carboxybenzyl viologen ligand 1, 1'-bis(4-carboxybenzyl)-4, 4'-bipyridinium dichloride ((H2Bpybc)Cl2) was used as the functional ligand, and the auxiliary ligand 1, 3, 5-benzene tricarboxylic acid (H3BTC) was introduced to self-assemble with different metal ions to synthesize three complexes: {[Cd(Bpybc)0.5(HBTC)(H2O)]·0.6H2O}n (1), [Ni(Bpybc)0.5(HBTC)(H2O)4] (2), and [Co(Bpybc)0.5(HBTC)(H2O)4] (3). The three complexes display different structural features, including a 2D structure of 1 and 0D structures of 2 and 3. Furthermore, these three complexes displayed different chromic properties. Complex 1 was photochromic only due to the generation of viologen radicals, while complexes 2 and 3 were photochromic originating from the photo-induced formation of viologen radicals accompanying the redox activity of metal ions. In addition, complex 2 showed thermochromic behavior, which is associated with the radical formation through electron transfer, while complex 3 exhibited a color change accompanying a reversible structural transformation due to dehydration and rehydration. These results suggest that metal ions play a significant role in regulating the structure and chromic behavior of viologen complexes.
Crystal Structure, Spectroscopic Characterization, and Optical Properties of the Hybrid Compound (C7H11N2)2[CdCl4]·0.5H2O
Garci Fatma, Klein Axel, Chebbi Hammouda, Faouzi Zid Mohamed
2022, 38(9): 1834-1842  doi: 10.11862/CJIC.2022.183
[摘要]  (187) [HTML全文] (187) [PDF 4094KB] (187)
摘要:
A preparation procedure for the title compound (C7H11N2)2[CdCl4]·0.5H2O (C7H11N2=4-(dimethylamino) pyridinium) was developed and gave good yields and purity. The Cd(Ⅱ) ion is coordinated in a slightly distorted tetrahedral environment by four chlorides. The crystal arrangement shows a layered structure with alternating organic and inorganic layers parallel to the (001) plane and located at x=n+1/2 (nZ). In the crystal, the organic and inorganic layers are linked by C—H…Cl, C—H…O, N—H…Cl and N —H…O hydrogen bonding interactions. Hirshfeld surface analysis and fingerprint plots of the structure reveal that molecular packing is governed by hydrogen bonds and π-stacking. The UV-Vis diffuse reflectance spectrum allowed us to determine a direct band gap of 3.596 eV with a semiconducting character, using the Tauc-extrapolation method. The observed photoluminescence band with a maximum at 562 nm is assigned to excited π-π* states in the 4-(dimethylamino)pyridinium cation.
Crystal Structure of Eu(Ⅲ) Coordination Polymer Based on Zwitterionic Ligand and Detection of Furacilin
Kai-Min WANG, Li-Feng LI, Ming-Feng SHI, Yan-Qing YE, Yu-Na WANG, Jin-Rong GUO, Huai-Jun TANG, Yu-Lu MA
2022, 38(9): 1843-1852  doi: 10.11862/CJIC.2022.196
[摘要]  (160) [HTML全文] (160) [PDF 5026KB] (160)
摘要:
A novel coordination polymer, {[Eu(L)2(H2O) 4]Cl3·2H2O}n (1) (L=1, 1'-((2, 3, 5, 6-tetramethyl-1, 4-phenylene) bis(methylene))bis(pyridin-1-ium-4-carboxylate)), was synthesized under hydrothermal conditions by a zwitterionic organic ligand and characterized by single crystal X-ray diffraction. Powder X-ray diffraction, IR, thermogravimetry, and luminescence properties of 1 were also determined. The solid-state luminescence properties of 1 were investigated, realizing the zwitterionic ligand is an excellent antenna chromophore for sensitizing Eu3+ ions. In addition, this water-stable 1 was utilized as a chemosensor to detect various common antibiotics to find that this one can exhibit high selectivity, sensitivity, and recyclability in the detection of furacilin molecules in aqueous phases.
Synthesis, Crystal Structure, and DNA Binding/Cleavage Properties of a Macrocyclic Heterobinuclear Zn(Ⅱ)-Ni(Ⅱ) Complex with Pyridylmethyl Pendant-Arms
Pei-Pei DING, Ming LI, Yu WU, Jun-Tao YAN, Chun-Lei WANG, Yang WANG, Jia-Wei MAO
2022, 38(9): 1853-1861  doi: 10.11862/CJIC.2022.199
[摘要]  (165) [HTML全文] (165) [PDF 1697KB] (165)
摘要:
A bis-pyridine pendant-armed macrocyclic heterobinuclear Zn(Ⅱ)-Ni(Ⅱ) complex [ZnNi(L)](ClO4)2·H2O (H2L=3, 3'-((ethane-1, 2-diylbis((pyridin-2-ylmethyl)azanediyl))bis(methylene)) bis(2-hydroxy-5-methylbenzaldehyde)) has been obtained and characterized by spectroscopy, elemental analysis and single-crystal X-ray diffraction. The coordination environment of Zn(Ⅱ) and Ni(Ⅱ) can be described as approximately distorted triangular prism and square pyramid, respectively. The Zn—Ni distance bridged by two phenoxide groups is 0.303 63(6) nm. The interaction between the complex and calf thymus DNA (CT-DNA) has been further confirmed by UV-Vis spectrophotometry, viscosity, and cyclic voltammetry study. The complex showed a good binding property to CT-DNA with a binding constant of 1.05×105 L·mol-1. The DNA cleavage activity has also been investigated using agarose gel electrophoresis.
One-Pot Preparation of Fe2O3/Fe2TiO5 S-Scheme Heterojunction Photocatalyst for Highly Efficient Degradation of Organic Pollution
Fang CHANG, Ying-Jie ZHAO, You-Ping SHOU, Lu ZHANG, Jiang-Nan WANG, Ting-Ting SHI
2022, 38(9): 1862-1870  doi: 10.11862/CJIC.2022.173
[摘要]  (151) [HTML全文] (151) [PDF 4950KB] (151)
摘要:
For the first time, Fe2O3/Fe2TiO5 heterojunction materials have been fabricated by a facile one-pot solvothermal method. After the construction of the S-scheme heterojunction, compared to pure Fe2O3 and Fe2TiO5, the photocatalytic degradation rate and efficiency of Fe2O3/Fe2TiO5 were significantly improved. After being illuminated for 2.5 h, nearly 100% of methylene blue (MB) has been degraded by Fe2O3/Fe2TiO5. In Fe2O3/Fe2TiO5 composite material, a built-in field is formed between Fe2O3 and Fe2TiO5, thus promoting the separation of photogenerated electron-hole pairs. Therefore, electrons in the conduction band (CB) of Fe2TiO5 and holes in the valence band (VB) of Fe2O3 with higher energy, which show high reduction and oxidation capacity, respectively, can retain and transfer to the surface to participate in the degradation reaction. Moreover, Fe2O3/Fe2TiO5 composite showed good photocatalytic stability.
Synthesis, Crystal Structure, and Detection of Acidic Amino Acids of a Cd(Ⅱ) Metal-Organic Framework Based on 5-((Naphthalen-1-ylmethyl)amino)isophthalic Acid
Ling-Wen ZHANG, Shu-Qin LIU, Pei-Pei ZHANG, Ai-Yun NI, Jian-Jun ZHANG
2022, 38(9): 1871-1877  doi: 10.11862/CJIC.2022.181
[摘要]  (158) [HTML全文] (158) [PDF 2357KB] (158)
摘要:
A 2D layered metal-organic framework [Cd(L) (H2O)]·H2O (1) was synthesized from 5-((naphthalen-1-ylmethyl)amino)isophthalic acid (H2L) and Cd2+ by a solvothermal method. Structural analysis reveals that the adjacent layers are connected by π-π stacking and C—H⋯π interactions to form a 3D supramolecular structure. Notably, the luminescence of 1 was significantly enhanced under acidic conditions, which can be used for selective and sensitive detection of acidic amino acids. The limits of detection of 1 for aspartic acid and glutamic acid were 3.88 and 5.43 μmol·L-1, respectively.
Zinc(Ⅱ) and Cadmium(Ⅲ) Complexes Derived from 4′-(2-Pyridyl)-2, 2′: 6′, 2″-terpyridine: Crystal Structures and Fluorescence Property
Ya-Nan YUAN, Zi-Xuan WANG, Zhao-Yang WANG, Yao-Yao SONG, Qing-Lun WANG, Chun YANG
2022, 38(9): 1878-1886  doi: 10.11862/CJIC.2022.194
[摘要]  (168) [HTML全文] (168) [PDF 2989KB] (168)
摘要:
Complexes [Zn(2-pyterpy)2](ClO4)2·0.25H2O (1) and [Cd(2-pyterpy)2]2(ClO4)4·2.33H2O·CH3OH(2)(2-pyterpy=4'-(2-pyridyl)-2, 2'∶6', 2″-terpyridine) were synthesized under solvothermal conditions, and structurally characterized by elemental analysis, FT-IR spectra, X-ray single crystal diffraction and powder X-ray diffraction. X-ray single crystal diffraction results show that they crystallize in the triclinic system with the P1 space group. In solidstate, complexes 1 and 2 showed the maxima emission band approximately at 539 and 547 nm upon excitation at 405 nm, respectively. In methanol solution, complexes 1 and 2 exhibited emissions at 408 and 371 nm upon excitation at 357 and 352 nm, respectively. The metastable-state photoacid mPAH1 showed fluorescence at 556 nm upon excitation at 467 nm. When complex 1 was titrated with mPAH1, the fluorescence of complex 1 at 408 nm was quenched by mPAH1 with a quenching constant KSV of 2.961×104 L·mol-1, but the fluorescence lifetime of complex 1 remained nearly unchanged, which is attributed to the inner filter effect. Conversely, titration of mPAH1 with complex 1 resulted in enhanced fluorescence of the mixed solution at 556 nm, which is attributed to partial protonation of complex 1 by mPAH1.