Two New Luminescent Cd(II)-Metal–Organic Frameworks as Bifunctional Chemosensors for Detection of Cations Fe3+, Anions CrO42–, and Cr2O72– in Aqueous Solution

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• 作者：Shuguang Chen ; Zhenzhen Shi ; Ling Qin ; Hailang Jia ; Hegen Zheng
• 刊名：Crystal Growth & Design
• 出版年：2017
• 出版时间：January 4, 2017
• 年：2017
• 卷：17
• 期：1
• 页码：67-72
• 全文大小：607K
• ISSN：1528-7505

文摘

Two new luminescent Cd(II)-metal–organic frameworks (MOFs), {[Cd(L)(BPDC)]·2H₂O}_n (1) and {[Cd(L)(SDBA)(H₂O)]·0.5H₂O}_n (2) [L = 4,4′-(2,5-bis(methylthio)-1,4-phenylene)dipyridine, H₂BPDC = 4,4′-biphenyldicarboxylic acid, H₂SDBA = 4,4′-sulfonyldibenzoic acid], have been solvothermally synthesized using Cd²⁺ ion and L ligand in the presence of auxiliary ligands and characterized by infrared spectroscopy, elemental analysis, powder X-ray diffraction, and thermogravimetry measurement. Topological analyses reveal that MOF 1 is a 6-connected 3-fold interpenetrating pcu network, and MOF 2 is a new 4-connected 2-fold interpenetrating network. Fluorescence titration, cyclic and anti-interference experiments demonstrate that MOFs 1 and 2 both are excellent probes for Fe³⁺, CrO₄^2–, and Cr₂O₇^2–. The mechanisms of quenching are also deeply studied.