Cobalt(II) and silver(I) coordination polymers containing flexible bis (benzimidazol‐1‐yl)hexane ligands: synthesis, crystal structures, sensing and photocatalytic properties

• Published in: Applied organometallic chemistry Vol. 34; no. 3
• Main Authors: Li, Ai‐Ling, Hao, Zeng‐Chuan, Han, Chao, Cui, Guang‐Hua
• Format: Journal Article
• Language: English
• Published: Chichester Wiley Subscription Services, Inc 01.03.2020
• Subjects: Benzaldehyde; Bis (benzimidazole); Chemistry; coordination polymer; Coordination polymers; Crystal structure; Infrared analysis; Luminescence quenching; luminescent quenching; Methylene blue; Photocatalysis; photocatalytic property; Silver; Ultraviolet radiation; X-ray diffraction
• ISSN: 0268-2605; 1099-0739
• DOI: 10.1002/aoc.5313

Two new ternary metal coordination polymers (CPs), namely, {[Co2(BTC)(L)]·0.25H2O}n (1) and [Ag(HIPA)(L)]n (2) (H4BTC = 1,2,3,4‐butanetetracarboxylic acid, H2IPA = 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 {43.63}2{46.66.73}. 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), Fe3+ (just 1) and Cr2O72− (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. Two new coordination polymers (CPs) bearing bis(benzimidazole)hexane have been synthesized and characterized. 1 exhibits unusual 2D network with point symbol {43.63}2{46.66.73}, 2 features 1D chain structure. Two CPs present efficient photocatalytic capacities for degrading methylene blue and methyl violet dyes. 1 and 2 show high selectivity for detecting benzaldehyde by fluorescence quenching. And CPs 1 and 2 can be used as highly selective and sensitive luminescent probes for sensing Fe3+ ion and Cr2O72‐–, respectively.