Dual Ligand Strategy for Constructing a Series of d10 Coordination Polymers: Syntheses, Structures, Photoluminescence, and Sensing Properties

5 years ago

Dual Ligand Strategy for Constructing a Series of d10 Coordination Polymers: Syntheses, Structures, Photoluminescence, and Sensing Properties

Guo-Ming Wang, Jie Pan, Di Zhang, Zhen-Zhen Xue, Jin-Hua Li

Constructed from a rigid pyrazine-tetrazole ligand, 5-(pyrazinyl)tetrazole (Hptz), as well as various polycarboxylate molecules, a series of novel Zn(II)/Cd(II) coordination polymers, [Cd(Hptz)(Hbtc)(H2O)2•H2O]n (1), [Cd2(ptz)(btc)(H2O)2•2H2O]n (2), [Cd2(ptz)2(p-bdc)]n (3), [Cd2(ptz)2(m-bdc)(H2O)]n (4), [Zn2(ptz)(btc)(H2O)2•H2O]n (5) and [Cd2(ptz)(btc)(DMA)(H2O)•4.5H2O]n (6) (H3btc = 1, 3, 5-benzenetricarboxylic acid, p-H2bdc = p-phthalic acid, m-H2bdc = m-phthalic acid, DMA = N,N-dimethylacetamide), have been obtained under hydrothermal or solvothermal conditions. The structural diversity of 1-6 mainly stems from the different and various coordination modes of the N-donor ligand, as different chelating or bridging/chelating fashions have generated various structures with one-, two-, or three-dimensions. Both π-π stacking interactions could be observed in adjacent chains and layers for 1 and 2, respectively, through which leads to 3D supramolecular frameworks. Differently, the 3D complicated architectures are constructed in 3-6 through the linkage of metal centers and organic ligands. All of these interesting structures have been determined and characterized by single-crystal X-ray diffraction analyses. Photoluminescence properties of compounds 1-6 have been investigated. Moreover, photoluminescence sensing experiment indicates that compound 1 and 6 can be acted as promising selective sensors towards Cu2+.

Publisher URL: http://dx.doi.org/10.1021/acs.cgd.7b01749

DOI: 10.1021/acs.cgd.7b01749