Liu Chang, Yan Bing
Department of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, China.
Photochem Photobiol Sci. 2015 Sep 26;14(9):1644-50. doi: 10.1039/c5pp00107b. Epub 2015 Jun 30.
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.
我们合成了一种锌沸石型金属有机框架材料，即沸石咪唑酯骨架材料（ZIF-90），它在可见光激发下呈现出强烈的蓝色发光。发光研究表明，ZIF-90可能是一种用于高灵敏度检测金属离子、阴离子和有机小分子的高效多功能荧光材料，特别是对于Cd(2+)、Cu(2+)、CrO4(2-)和丙酮。ZIF-90的发光强度随Cd(2+)浓度的增加而增强，随Cu(2+)浓度的增加而成比例降低，而在CrO4(2-)传感中也出现相同的猝灭实验现象。随着丙酮量的增加，ZIF-90乳液中的发光强度逐渐降低。同时，还详细研究了传感特性的机理。这项研究表明，ZIF-90可能是一种用于金属离子、阴离子和有机小分子的有用发光传感器。
