期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 247, 期 -, 页码 238-244出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.02.178
关键词
Alkaline earth metal ion; Coordination polymers; Sensing; Amine gases; Indicator box; Fluorescence color
资金
- National Natural Science Foundation of China [21571030, 21231002, 21371029, 91622108, 21671033]
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry (Jilin University) [2015.01]
A low-cost and convenient fluorescent indicator of alkaline earth metal-organic coordination polymer Sr (H(2)ABTC)(DMF)(H2O) (1) (ABTC = 3,3,5,5-azobenzenetetracarboxylic acid) was designed and synthesized by using a flexible ligand ABTC and alkaline earth metal ion Sr2+ for sensing trace amine gases in the air. The complex 1 was characterized by X-ray single crystal measurement, mainly composed of conjugated fluorophore and uncoordinated carboxyl groups. A series of detailed experiments confirmed the dramatic change of fluorescence color under ultraviolet. When the complex 1 interacted with amine gases, its fluorescence emission intensity is enhanced and emission peak redshift greatly. Of most important, convenient fluorescence detection for amine gases was realized by a homemade indicator box, which was reusable and allowed to detect the concentration of amine gases down to 10 ppb (parts per billion) upon real-time (3 min). The sensing mechanisms were analyzed through the closed-loop stiffening effect and the enhanced conjugate effect. (c) 2017 Published by Elsevier B.V.
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