期刊
DYES AND PIGMENTS
卷 98, 期 1, 页码 42-50出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2013.02.002
关键词
Fluorescent sensor; Mercury; Aluminum; Rhodamine; Phthalimido acids; Cellular imaging
资金
- National Natural Science Foundation of China [50973084]
- Science and Technical Development Foundation of Colleges and Universities, Tianjin, China [20071214]
Employing the Off-On switching of the spirocyclic moiety in Rhodamine B derivatives, three sensors were designed and characterized as new fluorescent probes for detecting Hg2+ and Al3+ in the environment, respectively. The first probe exhibited chromogenic and fluorogenic selectivity to detection of Hg2+ in methanol-H2O (4:6, v/v, HEPES, pH 7.0). The first and second probes displayed fluorescence intensity enhancement following Hg2+ coordination with limits of detection for Hg2+ at the ppb level. The limit of detection based on 3 blank/k was calculated to be 2.5 x 10(-8) M and 4.2 x 10(-8) M, respectively. The third probe contained a benzyl group which resulted in better selectivity for Al3+. Job's plot clearly suggested the formation of 1:1 complexation behavior between the three probes and Hg2+ or Al3+. The three probes can be used as a fluorescent probe for monitoring Hg2+ or Al3+ in living cells with satisfying results, which demonstrates the value of the probes in practical applications in environmental and biological systems. (C) 2013 Elsevier Ltd. All rights reserved.
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