Journal
TETRAHEDRON LETTERS
Volume 46, Issue 1, Pages 165-168Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2004.10.169
Keywords
Hg2+ ions; fluorescent chemosensor; calixarene; dansyl amide
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A new fluorescent chemosensor for Hg2+ based on a dansyl amide-armed calix[4]-aza-crown was reported. It exhibits high sensitivity and selectivity toward Hg2+ over a wide range of metal ions in MeCN-H2O (4:1, v/v). The association constant of the 1:1 complex formation for 2-Hg2+ was calculated to be 1.31 x 10(5) M-1, and the detection limit for Hg3+ was found to be 4.1 X 10(-6) mol L-1. (C) 2004 Elsevier Ltd. All rights reserved.
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