期刊
APPLIED ORGANOMETALLIC CHEMISTRY
卷 36, 期 7, 页码 -出版社
WILEY
DOI: 10.1002/aoc.6752
关键词
ammonia sensor; crystal structure; luminescent probe; reactive quenching; ternary europium complex
资金
- Science and Technology Innovation Plan of College Students in Zhejiang Province [2022R409014]
- Project of Innovation and Entrepreneurship Training for National Undergraduates [202010356013]
- Science and Technology Project of Zhejiang Province, China [LGC22F050003, LGF21B010001]
A thin film-based fluorescence sensor for rapid and accurate detection of ammonia was developed using a ternary europium (III) complex probe. The sensor exhibited highly sensitive and selective response to ammonia, achieving a low limit of detection of 2.740 x 10(-6) ppm.
The rapid and accurate detection of ammonia is very important for manufacture and environmental monitoring, which needs to be developed urgently. Herein, a thin film-based fluorescence sensor is fabricated by using a ternary europium (III) complex probe for ammonia. The new complex Eu(TPM)(3)(2-PBO) (1) was designed and synthesized by utilizing a trifluoromethyl substituted beta-diketone ligand TPM and a diimine ligand 2-PBO (TPM = 1,1,1-trifluoro-5,5-dimethyl-2,4-hexanedione, 2-PBO = 2-(2 '-pyridyl)-benzoxazole). This complex probe was synthetically characterized by elemental analysis, crystallographic and spectroscopic analysis, and photoluminescence (PL) study. The crystallographic analysis revealed complex 1 as a neutral complex structure with the Eu(III) center in a distorted square antiprism EuO6N2 coordination polyhedron. Based on this complex probe, a thin film fluorescence sensor with highly sensitive and selective response to ammonia was developed by polymethyl methacrylate (PMMA): complex composite and cellulose paper support. When the paper-based sensor was exposed to ammonia, its PL emission showed a sensing behavior of rapid quenching. Surprisingly, this new method can achieve excellent limit of detection as low as 2.740 x 10(-6) ppm.
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