Cobalt(II) and silver(I) coordination polymers containing flexible bis (benzimidazol‐1‐yl)hexane ligands: synthesis, crystal structures, sensing and photocatalytic properties
Ai‐Ling Li, Zeng‐Chuan Hao, Chao Han, Guang‐Hua Cui
Abstract
Two new ternary metal coordination polymers (CPs), namely, {[Co 2 (BTC)(L)]·0.25H 2 O} n ( 1 ) and [Ag(HIPA)(L)] n ( 2 ) (H 4 BTC = 1,2,3,4‐butanetetracarboxylic acid, H 2 IPA = isophthalic acid, L = 1,6‐bis(5,6‐dimethylbenzimidazol‐1‐yl)hexane) were hydrothermally synthesized and characterized by elemental analysis, infrared spectroscopy, single‐crystal X‐ray diffraction, and powder X‐ray diffraction (PXRD). 1 exhibits unusual 2D network with point symbol {4 3 .6 3 } 2 {4 6 .6 6 .7 3 }. 2 possesses 1D chain structure which is further extended into a 3D supramolecular network via O–H···O hydrogen‐bonding and π – π stacking interactions. 1 and 2 can selectively detect benzaldehyde (BZH), Fe 3+ (just 1 ) and Cr 2 O 7 2− (just 2 ) ions in water via the luminescence quenching process. Furthermore, the photocatalytic activities of two CPs were evaluated for degradation of methylene blue (MB) and methyl violet (MV) under UV irradiation.