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  • Title: Stable Indium-Pyridylcarboxylate Framework: Selective Gas Capture and Sensing of Fe3+ Ion in Water.
    Author: Zhang B, Zhang SH, Liu B, Yue KF, Hou L, Wang YY.
    Journal: Inorg Chem; 2018 Dec 17; 57(24):15262-15269. PubMed ID: 30480441.
    Abstract:
    By employing a pyridyl-decorated dicarboxylic acid ligand, 3-(2',5'-dicarboxylphenyl)pyridine acid (H2dcpy), a three-dimensional In3+-based metal-organic framework, H3O[In3(dcpy)4(OH)2]·3DMF·4H2O (1), with a good chemical stability toward acid and base has been synthesized. The compound 1 shows an uncommon (3,8)-connected tfz-d; UO3 topological net based on linear In3(COO)4(OH)2 clusters and also contains one-dimensional open channels. Particularly, 1 contains two types of dcpy2- linkers, in which the pyridyl group in one participates in coordination with the In3+ ion, whereas that in the other is uncoordinated but hangs in the inner sides of the channels as functionalized sites. Gas adsorption experiments demonstrate that 1 is able to selectively adsorb C2H2, C2H4, and CO2 over CH4. Simultaneously, 1 shows a highly selective and sensitive fluorescence detection toward Fe3+ ion in water with good recyclability.
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