Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 123, Issue -, Pages 216-223Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2013.12.079
Keywords
Fluorescent probe; Mercury; Rhodamine; Turn-on; Crystal structure; Cellular imaging
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Funding
- National Natural Science Foundation of China [21174103, 31200719]
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In this paper, we reported a new rhodamine derivative bearing 2,4-dichloroquinazoline as a selective fluorescent chemosensor for Hg2+. The ring-opening process of spirolactam enabled the large fluorescent enhancement and calorimetric change by Hg2+ induced configuration transformation of the rhodamine. Moreover, the fluorescence changes of the chemosensor were dramatically specific for Hg2+ in the presence of other metal ions, which could meet the selective requirements for practical application. Under optimized experimental conditions, the linear response range covered the concentration range of Hg2+ from 0 to 1.0 x 10(-6) M, and the limit of detection was calculated to be 2.7 x 10(-8) M. In addition, the probe was also successfully applied to the determination of Hg2+ in water samples, test strips and living cells. (C) 2013 Elsevier B.V. All rights reserved.
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