An Effective Hg2+-Selective Fluorescent Chemosensor Based on a Calix[4]arene Bearing Four Dansyl Amides

A new calix[4]arene‐based fluorescent chemosensor bearing four dansyl amides on the upper rim (1) was conveniently synthesized, which showed high sensitivity and selectivity toward Hg2+ over a wide range of metal ions in 50% aqueous acetonitrile. The complexation of Hg2+ ion induced a strong fluores...

Full description

Saved in:
Bibliographic Details
Published in:Chinese journal of chemistry 2008-08, Vol.26 (8), p.1440-1446
Main Authors: LI, Guang-Ke, LIU, Min, YANG, Guo-Qiang, CHEN, Chuan-Feng, HUANG, Zhi-Tang
Format: Article
Language:English
Subjects:
calixarene
dansyl amide
fluorescent chemosensor
Hg2+ recognition
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A new calix[4]arene‐based fluorescent chemosensor bearing four dansyl amides on the upper rim (1) was conveniently synthesized, which showed high sensitivity and selectivity toward Hg2+ over a wide range of metal ions in 50% aqueous acetonitrile. The complexation of Hg2+ ion induced a strong fluorescence quenching of 1 due to a well‐defined electron transfer process from the dansyl group(s) to the metal center. Compared with compounds 2 and 3, tetradansyl amide substituted calix[4]arene 1 showed a preorganized and coordinated complexing site for metal ions. Moreover, the detection limit for Hg2+ was found to be 3.41×10−6 mol·L−1, which might make 1 a potentially practical Hg2+‐selective fluorescent sensor in aqueous system.
ISSN:1001-604X
1614-7065
DOI:10.1002/cjoc.200890262