Direct Synthesis, Crystal Structure and Thermal Kinetics of Supramolecular Complex [Co(H2O)6]·(Hnip)2·(H2nip)2·(DMA)2·(H2O)8 (nip=5-nitroisophthalate, DMA=CH3NHCH3)

• Published in: Chinese journal of chemistry Vol. 25; no. 5; pp. 623 - 629
• Main Authors: Wang, Li-Qiong, Guo, Jin-Yu, Zhang, Tong-Lai, Zhang, Jian-Guo, Yang, Li, Qiao, Xiao-Jing, Wu, Rui-Feng, Yu, Wei
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.05.2007; WILEY‐VCH Verlag
• Subjects: 5-nitroisophthalic acid; crystal structure; nonisothermal kinetics; thermal decomposition mechanism
• ISSN: 1001-604X; 1614-7065
• DOI: 10.1002/cjoc.200790116

The crystal of [Co(H2O)6]·(Hnip)2·(H2nip)2·(DMA)2·(H2O)8 has been cultured using direct method and characterized by X‐ray single crystal diffractometry, elemental analysis and FTIR spectroscopy. It crystallizes in triclinic system, P‐1 space group with the cell parameters of a=0.7012(1) nm, b=1.1378(2) nm, c=1.6612(3) nm, α=84.92(3)°, β=85.19(3)°, γ=85.91(3)°, V=1.3128(5) nm3, Z=1, Dc1.573 g·cm−3. Final R indices [I>2σ(I)] are:R1=0.0279, wR2=0.0765 while R indices for all data are:R1=0.0327, wR2=0.0806. The Co coordination octahedra are each surrounded by two Hnip, two H2nip, two DMA and eight water molecules that are linked by hydrogen bonds and π‐π stacking interactions. Thermal analyses of DSC and TG‐DTG have been performed on the complex to predict its thermal decomposition mechanism and determine the most probable kinetic model function using Kissinger, Ozawa, integral and differential methods.