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Synthesis, structure and characterization of two new metal–organic coordination polymers based on the ligand 5‐iodobenzene‐1,3‐dicarboxylate
Author(s) -
Zhang Xu,
Zhang Lei,
Wang MengJie,
Zhang KouLin
Publication year - 2015
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229615014655
Subject(s) - iodobenzene , ligand (biochemistry) , characterization (materials science) , polymer , metal , metal organic framework , polymer chemistry , chemistry , coordination complex , combinatorial chemistry , materials science , organic chemistry , nanotechnology , catalysis , biochemistry , receptor , adsorption
Two new coordination polymers (CPs) formed from 5‐iodobenzene‐1,3‐dicarboxylic acid (H 2 iip) in the presence of the flexible 1,4‐bis(1 H ‐imidazol‐1‐yl)butane (bimb) auxiliary ligand, namely poly[[μ 2 ‐1,4‐bis(1 H ‐imidazol‐1‐yl)butane‐κ 2 N 3 : N 3′ ](μ 3 ‐5‐iodobenzene‐1,3‐dicarboxylato‐κ 4 O 1 , O 1′ : O 3 : O 3′ )cobalt(II)], [Co(C 8 H 3 IO 4 )(C 10 H 14 N 4 )] n or [Co(iip)(bimb)] n , (1), and poly[[[μ 2 ‐1,4‐bis(1 H ‐imidazol‐1‐yl)butane‐κ 2 N 3 : N 3′ ](μ 2 ‐5‐iodobenzene‐1,3‐dicarboxylato‐κ 2 O 1 : O 3 )zinc(II)] trihydrate], {[Zn(C 8 H 3 IO 4 )(C 10 H 14 N 4 )]·3H 2 O} n or {[Zn(iip)(bimb)]·3H 2 O} n , (2), were synthesized and characterized by FT–IR spectroscopy, thermogravimetric analysis (TGA), solid‐state UV–Vis spectroscopy, single‐crystal X‐ray diffraction analysis and powder X‐ray diffraction analysis (PXRD). The iip 2− ligand in (1) adopts the (κ 1 ,κ 1 ‐μ 2 )(κ 1 , κ 1 ‐μ 1 )‐μ 3 coordination mode, linking adjacent secondary building units into a ladder‐like chain. These chains are further connected by the flexible bimb ligand in a trans – trans – trans conformation. As a result, a twofold three‐dimensional interpenetrating α‐Po network is formed. Complex (2) exhibits a two‐dimensional (4,4) topological network architecture in which the iip 2− ligand shows the (κ 1 )(κ 1 )‐μ 2 coordination mode. The solid‐state UV–Vis spectra of (1) and (2) were investigated, together with the fluorescence properties of (2) in the solid state.