Field-induced Co single-ion magnet with pentagonal bipyramidal configuration
Shuyan ZHAO
【无机化学学报】doi: 10.11862/CJIC.20240231
A mononuclear Co complex, [Co(H2dapsc)(H2O)Cl]Cl·2H2O (1), with a pentagonal bipyramidal configuration was obtained by reflux reaction of CoCl2·6H2O and 2, 6-diacetylpyridine-bis(semicarbazone) (H2dapsc) in a mixed solvent of water and ethanol. The neutral ligand H2dapsc molecule provides five coordination atoms to form the equatorial plane of 1, while a water molecule and a Cl- ion occupy their axial positions. At the same time, the solid structure contains a valence counteranion Cl- ion and two lattice water molecules. The study of DC magnetic susceptibility indicates that complex 1 has strong magnetic anisotropy. The AC magnetic properties show the existence of slow magnetic relaxation behavior, which is dominated by both direct and Raman processes. The energy barrier for magnetization reversal was 55.55 K. Based on theoretical calculations, it can be concluded that the main reason for the slow magnetic relaxation behavior is the rhombic anisotropy of the pentagonal bipyramidal structure. The calculated D and E values were 45.68 and-0.32 cm-1.
关键词: Co complex, pentagonal bipyramid, crystal structure, magnetic property
措并举”科教融合实验教学模式促进“专业实验”课程建设
刘妍, 韩晓军, 徐平, 张国旭, 王宇, 张志成, 齐殿鹏
【大学化学】doi: 10.12461/PKU.DXHX202405002
专业内的实验课程在学生实践能力和综合科学素质培养上起到承上启下的作用。将“五措并举”科教融合的实验教学模式应用于“专业实验”课程建设中,从思政教育提实效、教学项目重融合、科研习惯厚基础、教学环节强实践、实验成果促创新等方面进行教学改革。以思政引领为基,科教融合为魂,开发综合型、探究型的实验项目、培养良好的实验习惯、融入研讨式实验过程,提高学生科学素养的同时,促进学生创新意识的启蒙和科技创新能力的培养,有效提升立德树人育人成果。
关键词: 科教融合, 实验教学改革, 创新培养
大学有机化学教学中羰基氧鎓的类反应
邢国文, 刘广建, 常乐
【大学化学】doi: 10.12461/PKU.DXHX202407058
羰基氧鎓作为活泼中间体,很容易发生多种反应。本文介绍了大学有机化学教学中涉及到的羰基氧鎓的五类反应,即加成、取代、分解、异构和周环,讨论了羰基氧鎓作为关键中间体在各种复杂有机反应机理中扮演着重要角色。需要注意的是,羰基氧鎓的反应复杂多变,多类反应存在竞争与共存。深入学习羰基氧鎓的五类反应,有助于有机化学科学思维和科学素养的养成,践行“有机化学是科学也是艺术”的教学理念。
关键词: 有机化学, 羰基, 氧鎓, 反应机理
无机化学课程“环一心”教学新形态的构建与实践
张欢, 钟国清, 蒋琪英, 胡文远, 杨定明, 沈娟, 戴亚堂, 李鸿波
【大学化学】doi: 10.12461/PKU.DXHX202412076
在能源化学工程专业的无机化学课程教学中,秉持“学生中心”和成果导向教育(OBE)理念,构建了“五环一心”教学新形态。通过教师主导,充分利用“互联网+”,从课程资源的精选与建设、教学方式方法的改革,到专业引领、深度融入课程思政,再到全程多元化课程评价,引导和激励学生在线上、线下和课前、课中、课后努力学习,同时提升综合能力和素养,实现了“知识传授、能力培养和价值引领浑然一体”的人才培养目标。
关键词: 无机化学, 五环一心, 教学新形态, 成果导向教育, 课程思政
聚焦杰出人才培养,“位一体”推进化学实验实践教学体系建设
周丽, 唐冬雁, 杜耘辰
【大学化学】doi: 10.12461/PKU.DXHX202405037
化学国家级实验教学示范中心(哈尔滨工业大学)积极响应时代发展对人才培养的新要求,以杰出人才培养为目标,提出“思政引领、科(产)教融合、赛创同行”的人才培养模式,构建了四层次实验课程体系,“五位一体”推进实验实践教学改革,形成具有化学化工特色的杰出人才培养模式与创新创业实践教学体系。中心对实验实践教学改革的探索,取得了明显的成效,成果可为化学类实验教学中心的建设提供一定的借鉴和参考价值。
关键词: 实验实践教学体系, 化学, 示范中心, 人才培养
Synthesis and structures of cdq-topological quaternary and (4, 4, 8)-c topological quinary Zn-MOFs with both oxalic acid and triazole ligands
Jing LIANG, Qian WANG, Junfeng BAI
【无机化学学报】doi: 10.11862/CJIC.20240177
Different solvothermal reactions of ZnC2O4 with oxalic acid (H2ox) and 1, 2, 4-triazole (Htrz) successfully gave a new quaternary (NJTU-Bai83, NJTU-Bai=Nanjing Tech University Bai's group) and a new quinary (NJTU- Bai84) anionic metal-organic frameworks (MOFs), where NJTU-Bai83=(Me2NH2)2[Zn3(trz)2(ox)3]·2H2O and NJTU-Bai84=(Me2NH2)[Zn3(trz)3(ox)2]·H2O, respectively. With the [Zn2(ox)4(trz)2] secondary building unit (SBU) in NJTU- Bai83 replaced by the [Zn3(ox)2(trz)6] and planar [Zn(ox)2(trz)2] ones in NJTU-Bai84, 2D supramolecular building layers (SBLs) are changed from the A-layer and B-layer to another A-layer, while pillars are transformed from the tetrahedral [Zn(ox)2(trz)2] SBU to the irregular tetrahedral [Zn(ox)2(trz)2] and planar [Zn(ox)2(trz)2] SBUs. Thus, cdq-topological quaternary NJTU-Bai83 is tuned to (4, 4, 8)-c new topological quinary NJTU-Bai84. Two MOFs were well characterized by powder X-ray diffraction, thermogravimetric analysis, elemental analysis, etc.
关键词: controlled synthesis, multivariant metal-organic frameworks, pillar-layer typed structures
Crystal structure, Hirshfeld surface analysis, and antifungal activity of five complexes based on 2,5-bis(carboxymethoxy)terephthalic acid
Jiarong ZHU, Xiaohua ZHANG, Xinting XIONG, Xuliang NIE, Xiuying SONG, Miaomiao ZHANG, Dayong PENG, Xiuguang YI
【无机化学学报】doi: 10.11862/CJIC.20250150
Five novel complexes [Co2(BCTA)(H2O)4]n (1), [Co2(BCTA)(Phen)2(H2O)2] (2), [Co2(BCTA)(Bipy)2(H2O)2] (3), [Cu2(BCTA)(Bipy)2(H2O)2]n (4), and [Cd2(BCTA)(Bipy)2(H2O)2]n (5) (H4BCTA=2,5-bis(carboxymethoxy)terephthalic acid, Phen=1, 10-phenanthroline, Bipy=2, 2′-bipyridine) were synthesized by solvothermal condition. All complexes were structurally characterized by infrared spectroscopy, elemental analysis, thermogravimetric analysis, and single-crystal X-ray diffraction. Complexes 2 and 3 have zero-dimensional structures, complex 5 has a 1D banded structure, and complexes 1 and 4 have 2D network structures. Hirshfeld surface analysis of complexes 1-5 was performed, and antifungal activities of the complexes were investigated. Complex 5 exhibited super-strong antifungal activity against seven pathogenic fungi, with all inhibitory rates reaching 100%.
关键词: 2,5-bis(carboxymethoxy)terephthalic acid, complex, crystal structure, Hirshfeld surface analysis, antifungal activity

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