The Fe ion is the most important element in environmental systems and plays a fundamental role in biological processes. Iron deficiency can result in diseases and highly selective and sensitive detection of trace Fe has become a hot topic. A novel two-dimensional Zn coordination framework, poly[[μ-4,4'-bis(2-methylimidazol-1-yl)diphenyl ether-κN:N](μ-4,4'-sulfonyldibenzoato-κO:O')zinc(II)], [Zn(CHOS)(CHNO)] or [Zn(SDBA)(BMIOPE)], (I), where HSDBA is 4,4'-sulfonyldibenzoic acid and BMIOPE is 4,4'-bis(2-methylimidazol-1-yl)diphenyl ether, has been prepared and characterized by IR, elemental analysis, thermal analysis and X-ray diffraction analysis, the latter showing that the coordination polymer exhibits a threefold interpenetrating two-dimensional 4-sql network. In addition, it displays a highly selective and sensitive sensing for Fe ions in aqueous solution.
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