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Issue 33, 2014
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Structural variability, topological analysis and photocatalytic properties of neoteric Cd(II) coordination polymers based on semirigid bis(thiazolylbenzimidazole) and different types of carboxylic acid linkers

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Abstract

A series of novel CdII coordination complexes, formulated as {[Cd(btbb)0.5(p-phda)]·H2O}n (1), [Cd(btbb)0.5(oba)]n (2), {[Cd2(btbb)(m-bdc)2(H2O)]·2H2O}n (3), {[Cd(btbb)0.5(btec)0.5(H2O)]·2H2O}n (4), [Cd(btbb)0.5(o-bdc)]n (5) and {[Cd2(btbb)(bptc)(H2O)]·4H2O}n (6) (btbb = 1,4-bis(2-(4-thiazolyl)benzimidazol-1-ylmethyl)benzene, H2phda = phenylenediacetic acid, H2oba = 4,4′-oxybis(benzoic acid), m-H2bdc = 1,3-benzenedicarboxylic acid, H4btec = 1,2,4,5-benzenetetracarboxylate, o-H2bdc = 1,2-benzenedicarboxylic acid, H4bptc = 3,3′,4,4′-benzophenone tetracarboxylic acid), have been obtained by solvothermal/hydrothermal reactions for the exploration of efficient photocatalytic degradation of organic dye pollutants. Complex 1 features a 6-connected 3D pcu α-Po primitive cubic topology net with the point symbol 412·63. Interestingly, complexes 2, 3 and 5 contain left- and right-handed helical chains (2: a 2-fold interpenetrating 3D architecture with {412·63}-pcu topology network; 3: a (3,6)-connected net with a vertex symbol (42·54·66·7·82)(4·62); 5: a (3,4)-connected 3,4L83 topology net with point symbol (42·6)(42·63·8)). Complex 4 exhibits a (3,4)-connected 3,4T48 topology net with point symbol (84·102)(8·102), while complex 6 possesses a (3,5)-connected 3,5L2 topology with the point symbol (42·6)(42·67·8). Furthermore, the photophysical studies indicate that the relatively narrow optical energy gaps of complexes 1–6 (<2.30 eV) calculated from the diffuse reflectivity spectra reflect their outstanding semiconductive nature. The photocatalytic properties of complexes 1–6 were studied in detail, and the results demonstrate their good photocatalytic activities in methylene blue (MB) degradation reactions, especially for complexes 3, 4 and 6 (3: 91.4%, 4: 92.7%, 6: 86.7%).

Graphical abstract: Structural variability, topological analysis and photocatalytic properties of neoteric Cd(ii) coordination polymers based on semirigid bis(thiazolylbenzimidazole) and different types of carboxylic acid linkers

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Publication details

The article was received on 15 Apr 2014, accepted on 16 Jun 2014, published on 17 Jun 2014 and first published online on 17 Jun 2014


Article type: Paper
DOI: 10.1039/C4DT01080A
Citation: Dalton Trans., 2014,43, 12790-12799
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    Structural variability, topological analysis and photocatalytic properties of neoteric Cd(II) coordination polymers based on semirigid bis(thiazolylbenzimidazole) and different types of carboxylic acid linkers

    L. Liu, J. Ding, M. Li, X. Lv, J. Wu, H. Hou and Y. Fan, Dalton Trans., 2014, 43, 12790
    DOI: 10.1039/C4DT01080A

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