Metal鈥揙rganic Frameworks Based on Flexible V-Shaped Polycarboxylate Acids: Hydrogen Bondings, Non-Interpenetrated and Polycatenated

详细信息    查看全文

• 作者：Qingxiang Yang ; Xingqiu Chen ; Jiehu Cui ; Jinsong Hu ; Mingdao Zhang ; Ling Qin ; Gaofeng Wang ; Qingyi Lu ; Hegen Zheng
• 刊名：Crystal Growth & Design
• 出版年：2012
• 出版时间：August 1, 2012
• 年：2012
• 卷：12
• 期：8
• 页码：4072-4082
• 全文大小：797K
• 年卷期：v.12,no.8(August 1, 2012)
• ISSN：1528-7505

文摘

Solvothermal reactions of 4,4鈥?dicarboxydiphenylamine (H₂L) with 4,4鈥?bis(imidazol-1-yl)phenyl (BIP) and 4,4鈥?bis(imidazol-1-yl)diphenyl (BIBP) in the presence of cobalt(II), cadmium(II), zinc(II) salts in H₂O/CH₃CN or H₂O/DMF produced five new complexes, namely, [Co₂(L)₂(BIP)₂路3H₂O]_n (1), [Co(L)(BIP)路2CH₃CN]_n (2), [Co(L)(BIBP)路H₂O]_n (3), [Cd(L)(BIBP)]_n (4), [Zn(L)(BIBP)]_n (5). Compound 1 has binuclear Co(II) clusters, which are linked by L^{2鈥?/sup> and BIP to generate a rare three-dimensional (3D) non-interpenetrated cds-type framework, and displays ferromagnetic character. Compound 2 possesses unusual 3-fold 2D 鈫?2D polycatenation of (4, 4) nets. Compound 3 reveals a (4, 4) grid topology with very strong hydrogen bondings due to the abundant uncoordinated carboxyl groups, which load in the structure like a freely dangling arm. Compound 3 also displays weak ferromagnetic character. Compounds 4 and 5 are isomorphic. H₂L and BIBP ligands in 4 and 5 interact with a metal center to form wave-like 2D sheets. In addition, the thermal stabilities and photochemical properties of compounds have been studied.}