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Issue 5, 2018
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Assembly of ZnII-coordination polymers constructed from benzothiadiazole functionalized bipyridines and V-shaped dicarboxylic acids: topology variety, photochemical and visible-light-driven photocatalytic properties

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Abstract

Four coordination polymers constructed from a benzothiadiazole functionalized bipyridine ligand bearing vinyl linkage 4,7-bis((E)-2-(pyridin-4-yl)vinyl)benzo[2,1,3]thiadiazole (bptda) with diverse conformations, namely, [Zn2(bptda)(dpa)2]n (1), {[Zn2(bptda)(oba)2]·2.75DMF}n (2), {[Zn4(bptda)3(oba)4]·2H2O}n (3), and [Zn2(bptda)(sdba)2]n (4), have been synthesized under solvothermal/hydrothermal conditions by tuning V-shaped aromatic polycarboxylate co-ligands possessing different bend angles (4,4′-dicarboxydiphenylamine (H2dpa), 4,4′-oxybis(benzoic acid) (H2oba), and 4,4′-sulfonyldibenzoic acid (H2sdba)). All the obtained complexes are based on binuclear secondary building units (SBUs), but exhibit different topologies. Complex 1 presents a uninodal 3-fold interpenetrated jsm topology with the point symbol 510·64·7, complex 2 shows a 6-connected threefold interpenetrated structure with pcu topology, complex 3 presents a 2D + 2D → 3D polycatenation, and complex 4 reveals a 2D + 2D → 2D twofold interpenetrating network with both polyrotaxane and polycatenane features. The effects of the bend angles of the V-shaped dicarboxylic acids on the diverse structures have been discussed. The thermal and luminescence properties of the complexes are investigated. The functionalization effect of thiadiazole groups on the optical absorption and visible-light-driven photocatalytic degradation of rhodamine B (RhB), methylene blue (MB), and crystal violet (CV) has been investigated.

Graphical abstract: Assembly of ZnII-coordination polymers constructed from benzothiadiazole functionalized bipyridines and V-shaped dicarboxylic acids: topology variety, photochemical and visible-light-driven photocatalytic properties

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Publication details

The article was received on 07 Nov 2017, accepted on 27 Dec 2017 and first published on 27 Dec 2017


Article type: Paper
DOI: 10.1039/C7CE01933E
Citation: CrystEngComm, 2018,20, 668-678
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    Assembly of ZnII-coordination polymers constructed from benzothiadiazole functionalized bipyridines and V-shaped dicarboxylic acids: topology variety, photochemical and visible-light-driven photocatalytic properties

    W. Song, L. Liang, X. Cui, X. Wang, E. Yang and X. Zhao, CrystEngComm, 2018, 20, 668
    DOI: 10.1039/C7CE01933E

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