Citation: HUANG Wenxi, LIU Tianxi, GAO Lianxun, ZHANG Xin, XU Jiping, DING Mengxian. X-RAY CRYSTALLOGRAPHIC STRUCTURE OF Meta-AND Para-DIMETHYL ESTER OF PYROMELLITIC ACID[J]. Chinese Journal of Polymer Science, ;1997, 15(1): 40-49. shu

X-RAY CRYSTALLOGRAPHIC STRUCTURE OF Meta-AND Para-DIMETHYL ESTER OF PYROMELLITIC ACID

Received Date: 28 September 1995

The polycrystalline powder of para- and meta-dimethyl ester of pyromellitic acid (PMDE)have been prepared by fractional crystallization, and their crystal structures have been de-termined by Wide-Angle X-ray Diffraction (WAXD). Both p-PMDE and m-PMDE wasfound to be orthorhombic crystal system, and their unit cell parameters a = 0.840nm,b = 0.707 nm, c = 1.136 nm and a = 1.032 nm, b = 0.835 nm, c = 0.714 nm, respectively.Space group all belongs to Pmmm. p-PMDE has two molecules per unit cell with crystal density 1.388g·cm-3,while m-PMDE has two molecules per unit cell with crystal density 1.522g·cm-3.Indices of crystal diffraction peaks are also detailed in the present work.The difference in crystal structures between p-PMDE and m-PMDE has thus been used to explain the curing behavior of isomerically pyromellitic dianhydride-based poly(amic ester)s.
1. [1]
  Xin Dong , Tianqi Chen , Jing Liang , Lei Wang , Huajie Wu , Zhijin Xu , Junhua Luo , Li-Na Li . Structure design of lead-free chiral-polar perovskites for sensitive self-powered X-ray detection. Chinese Journal of Structural Chemistry, 2024, 43(6): 100256-100256. doi: 10.1016/j.cjsc.2024.100256
2. [2]
  Yu Pang , Min Wang , Ning-Hua Yang , Min Xue , Yong Yang . One-pot synthesis of a giant twisted double-layer chiral macrocycle via [4 + 8] imine condensation and its X-ray structure. Chinese Chemical Letters, 2024, 35(10): 109575-. doi: 10.1016/j.cclet.2024.109575
3. [3]
  Jingqi Ma , Huangjie Lu , Junpu Yang , Liangwei Yang , Jian-Qiang Wang , Xianlong Du , Jian Lin . Rational design and synthesis of a uranyl-organic hybrid for X-ray scintillation. Chinese Journal of Structural Chemistry, 2024, 43(5): 100275-100275. doi: 10.1016/j.cjsc.2024.100275
4. [4]
  Xin Dong , Jing Liang , Zhijin Xu , Huajie Wu , Lei Wang , Shihai You , Junhua Luo , Lina Li . Exploring centimeter-sized crystals of bismuth-iodide perovskite toward highly sensitive X-ray detection. Chinese Chemical Letters, 2024, 35(6): 108708-. doi: 10.1016/j.cclet.2023.108708
5. [5]
  Xiuwen Xu , Quan Zhou , Yacong Wang , Yunjie He , Qiang Wang , Yuan Wang , Bing Chen . Expanding the toolbox of metal-free organic halide perovskite for X-ray detection. Chinese Chemical Letters, 2024, 35(9): 109272-. doi: 10.1016/j.cclet.2023.109272
6. [6]
  Hong-Jin Liao , Zhu Zhuo , Qing Li , Yoshihito Shiota , Jonathan P. Hill , Katsuhiko Ariga , Zi-Xiu Lu , Lu-Yao Liu , Zi-Ang Nan , Wei Wang , You-Gui Huang . A new class of crystalline X-ray induced photochromic materials assembled from anion-directed folding of a flexible cation. Chinese Chemical Letters, 2024, 35(8): 109052-. doi: 10.1016/j.cclet.2023.109052
7. [7]
  Xuying Yu , Jiarong Mi , Yulan Han , Cai Sun , Mingsheng Wang , Guocong Guo . A stable radiochromic semiconductive viologen-based metal–organic framework for dual-mode direct X-ray detection. Chinese Chemical Letters, 2024, 35(9): 109233-. doi: 10.1016/j.cclet.2023.109233
8. [8]
  Yan-Jiang Li , Shu-Lei Chou , Yao Xiao . Detecting dynamic structural evolution based on in-situ high-energy X-ray diffraction technology for sodium layered oxide cathodes. Chinese Chemical Letters, 2025, 36(2): 110389-. doi: 10.1016/j.cclet.2024.110389
9. [9]
  Shenhao QIU , Qingquan XIAO , Huazhu TANG , Quan XIE . First-principles study on electronic structure, optical and magnetic properties of rare earth elements X (X=Sc, Y, La, Ce, Eu) doped with two-dimensional GaSe. Chinese Journal of Inorganic Chemistry, 2024, 40(11): 2250-2258. doi: 10.11862/CJIC.20240104
10. [10]
  Yulin Mao , Jingyu Ma , Jiecheng Ji , Yuliang Wang , Wanhua Wu , Cheng Yang . Crown aldoxime ethers: Their synthesis, structure, acid-catalyzed/photo-induced isomerization and adjustable guest binding. Chinese Chemical Letters, 2024, 35(11): 109927-. doi: 10.1016/j.cclet.2024.109927
11. [11]
  Kaimin WANG , Xiong GU , Na DENG , Hongmei YU , Yanqin YE , Yulu MA . Synthesis, structure, fluorescence properties, and Hirshfeld surface analysis of three Zn(Ⅱ)/Cu(Ⅱ) complexes based on 5-(dimethylamino) isophthalic acid. Chinese Journal of Inorganic Chemistry, 2024, 40(7): 1397-1408. doi: 10.11862/CJIC.20240009
12. [12]
  Luyan Shi , Ke Zhu , Yuting Yang , Qinrui Liang , Qimin Peng , Shuqing Zhou , Tayirjan Taylor Isimjan , Xiulin Yang . Phytic acid-derivative Co₂B-CoPO_x coralloidal structure with delicate boron vacancy for enhanced hydrogen generation from sodium borohydride. Chinese Chemical Letters, 2024, 35(4): 109222-. doi: 10.1016/j.cclet.2023.109222
13. [13]
  Jijoe Samuel Prabagar , Kumbam Lingeshwar Reddy , Dong-Kwon Lim . Visible-light responsive gold nanoparticle and nano-sized Bi2O3-x sheet heterozygote structure for efficient photocatalytic conversion of N2 to NH3. Chinese Journal of Structural Chemistry, 2025, 44(4): 100564-100564. doi: 10.1016/j.cjsc.2025.100564
14. [14]
  Jiale Zheng , Mei Chen , Huadong Yuan , Jianmin Luo , Yao Wang , Jianwei Nai , Xinyong Tao , Yujing Liu . Electron-microscopical visualization on the interfacial and crystallographic structures of lithium metal anode. Chinese Chemical Letters, 2024, 35(6): 108812-. doi: 10.1016/j.cclet.2023.108812
15. [15]
  Haitao Yin , Liang Meng , Li Li , Jiamu Xiao , Longrui Liang , Nannan Huang , Yansong Shi , Angang Zhao , Jingwen Hou . Polydopamine-modified biochar supported polylactic acid and zero-valent iron affects the functional microbial community structure for 1,1,1-trichloroethane removal in simulated groundwater. Chinese Chemical Letters, 2025, 36(1): 110313-. doi: 10.1016/j.cclet.2024.110313
16. [16]
  Pengfei Zhang , Qingxue Ma , Zhiwei Jiang , Xiaohua Xu , Zhong Jin . Transition-metal-catalyzed remote meta-C—H alkylation and alkynylation of aryl sulfonic acids enabled by an indolyl template. Chinese Chemical Letters, 2024, 35(8): 109361-. doi: 10.1016/j.cclet.2023.109361
17. [17]
  Chong Liu , Ling Li , Jiahui Gao , Yanwei Li , Nazhen Zhang , Jing Zang , Cong Liu , Zhaopei Guo , Yanhui Li , Huayu Tian . The study of antibacterial activity of cationic poly(β-amino ester) regulating by amphiphilic balance. Chinese Chemical Letters, 2025, 36(2): 110118-. doi: 10.1016/j.cclet.2024.110118
18. [18]
  Shaonan Liu , Shuixing Dai , Minghua Huang . The impact of ester groups on 1,8-naphthalimide electron transport material in organic solar cells. Chinese Journal of Structural Chemistry, 2024, 43(6): 100277-100277. doi: 10.1016/j.cjsc.2024.100277
19. [19]
  Zhenjie Yang , Chenyang Hu , Xuan Pang , Xuesi Chen . Sequence design in terpolymerization of ε-caprolactone, CO₂ and cyclohexane oxide: Random ester-carbonate distributions lead to large-span tunability. Chinese Chemical Letters, 2024, 35(5): 109340-. doi: 10.1016/j.cclet.2023.109340
20. [20]
  Zhili Li , Qijun Wo , Dongdong Huang , Dezhong Zhou , Lei Guo , Yeqing Mao . Improving gene transfection efficiency of highly branched poly(β-amino ester)s through the in-situ conversion of inactive terminal groups. Chinese Chemical Letters, 2024, 35(8): 109737-. doi: 10.1016/j.cclet.2024.109737

Get Citation

PDF

XML

Metrics

PDF Downloads(0)
Abstract views(569)
HTML views(11)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return