Abstract
A known Zn-based luminescent coordination polymer (LCP) [Zn(2,6-ndc)(H2O)] (1, 2,6-H2ndc = naphthalene-2,6-dicarboxylic acid, CCDC 182255) featuring a condensed three-dimensional framework has been re-constructed. LCP 1 is highly stable in various solvents and displays reversible dehydration–rehydration phase transformations. Photoluminescence studies showed that LCP 1 emits ligand-centered blue-light fluorescence in solid-state and in various solvent suspensions. Therefore, LCP 1 behaves as a recyclable crystalline sensor material for efficient detection of iodine vapor due to the immense fluorescence quenching effect. Through metal-ion exchange, LCP 1 proceeds partial substitution of Zn2+ by Cu2+ in the framework via a single-crystal to single-crystal (SCSC) transformation accompanied by obvious crystal color change from colorless to green.
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