title: Luminescent zinc metal-organic framework (ZIF-90) for sensing metal ions, anions and small molecules.
abstract: We synthesize a zinc zeolite-type metal-organic framework, the zeolitic imidazolate framework (ZIF-90), which exhibits an intense blue luminescence excited under visible light. Luminescent studies indicate that ZIF-90 could be an efficient multifunctional fluorescence material for high sensitivity metal ions, anions and organic small molecules, especially for Cd(2+), Cu(2+), CrO4(2-) and acetone. The luminescence intensity of ZIF-90 increases with the concentration of Cd(2+) and decreases proportionally with the concentration of Cu(2+), while the same quenched experimental phenomena appear in the sensing of CrO4(2-). With the increase of the amount of acetone, the luminescence intensity decreases gradually in the emulsions of ZIF-90. The mechanism of the sensing properties is studied in detail as well. This study shows that ZIF-90 could be a useful luminescent sensor for metal ions, anions and organic small molecules.
authors.affiliation: Department of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, China. byan@tongji.edu.cn.
authors.forename: Chang
authors.initials: C
authors.lastname: Liu
authors.forename: Bing
authors.initials: B
authors.lastname: Yan