Luminescent zinc metal-organic framework (ZIF-90) for sensing metal ions, anions and small molecules
Luminescent zinc metal-organic framework (ZIF-90) for sensing metal ions, anions and small molecules
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DOI：
10.1039/c5pp00107b
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发表时间：
2015-01-01
影响因子：
3.1
通讯作者：
Yan, Bing
中科院分区：
文献类型：
--
作者：
Liu, Chang;Yan, Bing
我们合成了一种锌沸石型金属-有机骨架--沸石咪唑骨架(ZIF-90)，它在可见光激发下表现出强烈的蓝色发光。发光研究表明，ZIF-90对高灵敏度的金属离子、阴离子和有机小分子，特别是对Cd~(2+)、Cu~(2+)、CrO_4~(2-)和丙酮是一种高效的多功能荧光材料。ZIF-90的发光强度随Cd~(2+)浓度的增加而增大，随Cu2+浓度的增加而成比例地减小，而对CrO_4~(2-)的传感则出现同样的猝灭实验现象。随着丙酮用量的增加，ZIF-90乳液中的发光强度逐渐减弱。并对其传感机理进行了详细的研究。本研究表明，ZIF-90可以作为金属离子、阴离子和有机小分子的发光传感器。
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 Cd2+, Cu2+, CrO42- and acetone. The luminescence intensity of ZIF-90 increases with the concentration of Cd2+ and decreases proportionally with the concentration of Cu2+, while the same quenched experimental phenomena appear in the sensing of CrO42-. 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.