title: The assembly of thiophene-based bis-pyridyl-bis-amide CoIIcoordination polymers and their polypyrrole-functionalized hybrid materials for boosting their photocatalytic performances.
abstract: Herein, a series of multifunctional CoIIcoordination polymer (CP) materials, which were based on a new semi-rigid thiophene-containing bis-pyridyl-bis-amide N,N'-bis(pyridine-3-yl)thiophene-2,5-dicarboxamide (3-bptpa) ligand and different polycarboxylates, namely, [Co(3-bptpa)(1,3-BDC)]·2H2O (CP1), [Co(3-bptpa)(5-MIP)]·2H2O (CP2), [Co(3-bptpa)(1,3,5-HBTC)] (CP3), [Co(3-bptpa)(5-NIP)]·2H2O (CP4) and [Co(3-bptpa)(1,3-BDC)]·2H2O (CP5) (1,3-H2BDC = 1,3-benzenedicarboxylic acid, 5-H2MIP = 5-methylisophthalic acid, 1,3,5-H3BTC = 1,3,5-benzenetricarboxylic acid, 5-H2NIP = 5-nitroisophthalic acid) and their polypyrrole (PPy)-functionalized hybrid materials PPy/CPn (n = 1, 2, 3, 4, 5), have been prepared. The CP materials were structurally characterized by single-crystal X-ray diffraction analyses, IR spectra, UV-vis diffuse-reflectance spectra (DRS), powder X-ray diffraction (PXRD) and thermal gravimetric analyses (TG). The structural analyses indicate that CP1-CP4 reveal similar 2D networks. CP5 exhibits a 2-fold interpenetrating 3D α-Po framework. The PPy-functionalized CP1-CP5 hybrid materials PPy/CPn were fabricated by the combination of micro-size CP particles and PPyvia a facile in situ chemical oxidation polymerization process under the initiation of ammonium persulfate (APS). The photocatalytic properties of CP1-CP5 and PPy/CPn hybrid materials have been investigated in detail. As a result, after being decorated with PPy, the photocatalytic properties of the hybrid materials, particularly PPy/CP3, have been observably enhanced for the degradation of methylene blue (MB) under visible light irradiation.
authors.affiliation: Department of Chemistry, Bohai University, Jinzhou, 121000, P. R. China. wangxiuli@bhu.edu.cn.
authors.forename: Xiu-Li
authors.initials: XL
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Bohai University, Jinzhou, 121000, P. R. China. wangxiuli@bhu.edu.cn.
authors.forename: Xiao-Mei
authors.initials: XM
authors.lastname: Wu
authors.affiliation: Department of Chemistry, Bohai University, Jinzhou, 121000, P. R. China. wangxiuli@bhu.edu.cn.
authors.forename: Guo-Cheng
authors.initials: GC
authors.lastname: Liu
authors.affiliation: Department of Chemistry, Bohai University, Jinzhou, 121000, P. R. China. wangxiuli@bhu.edu.cn.
authors.forename: Hong-Yan
authors.initials: HY
authors.lastname: Lin
authors.affiliation: Department of Chemistry, Bohai University, Jinzhou, 121000, P. R. China. wangxiuli@bhu.edu.cn.
authors.forename: Xiang
authors.initials: X
authors.lastname: Wang