期刊
TETRAHEDRON LETTERS
卷 50, 期 23, 页码 2822-2824出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2009.03.179
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资金
- KRF [2008-312-C00206]
- Seoul RBD
- Ministry of Education [BK 21]
- National Research Foundation of Korea [과06A1501] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We have developed naphthalimide-based fluorescent chemosensors that exhibit fluorescence enhancement upon binding Zn2+ ion in 10 mM HEPES buffer (pH 7.4) at 25 degrees C. The fluorescence enhancement was induced by a PET inhibition process in which electron transfer from the nitrogen lone pair electrons of the Dpa unit to naphthalimide was blocked upon the binding of the sensor to Zn2+. The longer the linker length (n = 1-3) of the sensor, the less the PET efficiency becomes. Among the sensors (1, 2, and 3) examined, I shows the highest selectivity and sensitivity for Zn2+ over other transition metal ions and alkali metal ions in water. (C) 2009 Elsevier Ltd. All rights reserved.
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