Tuning the Luminescence of Metal-Organic Frameworks for Detection of Energetic Heterocyclic Compounds

被引：457

作者：

Guo, Yuexin ^{[1
]}

Feng, Xiao ^{[1
]}

Han, Tianyu ^{[2
]}

Wang, Shan ^{[1
]}

Lin, Zhengguo ^{[1
]}

Dong, Yuping ^{[2
]}

Wang, Bo ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Chem, Minist Educ China, Key Lab Cluster Sci, Beijing 100081, Peoples R China

[2] Beijing Inst Technol, Coll Mat Sci & Engn, Beijing 100081, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2014年 / 136卷 / 44期

基金：

中国国家自然科学基金;

关键词：

TURN-ON FLUORESCENCE; THERMAL-DECOMPOSITION; SALTS; DERIVATIVES; EXPLOSIVES; RDX; NTO;

D O I：

10.1021/ja508962m

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

Herein we report three metal-organic frameworks (MOFs), TABD-MOF-1, -2, and -3, constructed from Mg2+, Ni2+, and Co2+, respectively, and deprotonated 4,4'-((Z,Z)-1,4-diphenylbuta-1,3-diene-1,4-diyl)dibenzoic acid (TABD-COOH). The fluorescence of these three MOFs is tuned from highly emissive to completely nonemissive via ligand-to-metal charge transfer by rational alteration of the metal ion. Through competitive coordination substitution, the organic linkers in the TABD-MOFs are released and subsequently reassemble to form emissive aggregates due to aggregation-induced emission. This enables highly sensitive and selective detection of explosives such as five-membered-ring energetic heterocyclic compounds in a few seconds with low detection limits through emission shift and/or turn-on. Remarkably, the cobalt-based MOF can selectively sense the powerful explosive 5-nitro-2,4-dihydro-3H-1,2,4-triazole-3-one with high sensitivity discernible by the naked eye (detection limit = 6.5 ng on a 1 cm(2) testing strip) and parts per billion-scale sensitivity by spectroscopy via pronounced fluorescence emission.

引用

页码：15485 / 15488

页数：4

共 36 条

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