Cadmium(II)–Triazole Framework as a Luminescent Probe for Ca2+ and Cyano Complexes |
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| Authors: | Prof Ying Wang Ping Xu Qiong Xie Qing‐Qing Ma Yan‐Hui Meng Dr Zi‐Wen Wang Dr Shaowei Zhang Prof?Dr Xiao‐Jun Zhao Prof?Dr Jun Chen Prof?Dr Zhong‐Liang Wang |
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| Affiliation: | 1. Key Laboratory of Inorganic-Organic, Hybrid Functional Material Chemistry, Ministry of Education, College of Chemistry, Tianjin Normal University, Tianjin, P.R. China;2. Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education, Nankai University, Tianjin, P.R. China;3. Key Laboratory of Theoretical Organic Chemistry, and Functional Molecule of the Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, P.R. China;4. Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin, P.R. China |
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| Abstract: | A bidentate ligand, 1‐{4‐4‐(1H‐1,2,4‐triazol‐1‐yl)phenoxy]phenyl}‐1H‐1,2,4‐triazole (TPPT), has been designed and synthesized. By using TPPT as a building block for self‐assembly with Cd(NO3)2 ? 4 H2O and CdCl2 ? 10.5 H2O, novel 1D double‐chain {Cd(TPPT)(NO3)2] ? 3 H2O}n ( 1 ) and 2D (4,4) layer Cd(TPPT)Cl2(H2O)]n ( 2 ) have been constructed. When 1 was employed as a precursor and exposed to DMF or N,N′‐dimethylacetamide (DMAC), the crystals of 1 dissolved and reassembled into two types of brown block‐shaped crystals of 1D double chains: {Cd(TPPT)2(NO3)2] ? DMF}n ( 1 a ) and {Cd(TPPT)2(NO3)2] ? DMAC}n ( 1 b ). The anion‐exchange reactions of complex 2 have also been investigated. After gently stirring crystals of 2 in CHCl3/C2H5OH/H2O containing NaBr, NaI ? 2 H2O, or NaOAc ? 3 H2O, the crystals retained their crystalline appearances. A remarkable single crystal to single crystal transformation was observed and 1D double chains of {Cd(TPPT)Br2] ? C2H5OH}n ( 2 a ) and {Cd(TPPT)2I2] ? CHCl3}n ( 2 b ), and 1D single chains of Cd(TPPT)(H2O)2(CH3COO)2]n ( 2 c ), can be obtained. Luminescent properties indicate that 1 shows excellent selectivity for Ca2+ and cyano complexes. To the best of our knowledge, this is the first example of a luminescent probe for Ca2+ based on triazole derivatives. |
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| Keywords: | crystal growth fluorescence metal– organic frameworks self-assembly sensors |
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