A Squaraine-Based Colorimetric and “Turn on” Fluorescent Sensor for Selective Detection of Hg2+ in an Aqueous Medium

A novel squaraine-based chemosensor SQ-1 has been synthesized, and its sensing behavior toward various metal ions was investigated by UV−vis and fluorescence spectroscopies. In AcOH−H2O (40:60, v/v) solution, Hg2+ ions coordinate with SQ-1 causing a deaggregation which induces a visual color and abs...

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Published inOrganic letters Vol. 13; no. 5; pp. 1162 - 1165
Main Authors Chen, Cheng, Wang, Ruyong, Guo, Liangqia, Fu, Nanyan, Dong, Haijun, Yuan, Yaofeng
Format Journal Article
LanguageEnglish
Published WASHINGTON American Chemical Society 04.03.2011
Amer Chemical Soc
Subjects
Chemistry
Chemistry, Organic
Colorimetry - methods
Cyclobutanes
Fluorescent Dyes
Ions
Mercury - analysis
Metals - analysis
Phenols
Physical Sciences
Science & Technology
Water
REPORTER
FOLDAMER
MERCURY
DYES
BEHAVIOR
PHOTOPHYSICS
ION
LANGMUIR-BLODGETT-FILMS
AGGREGATION
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Summary:A novel squaraine-based chemosensor SQ-1 has been synthesized, and its sensing behavior toward various metal ions was investigated by UV−vis and fluorescence spectroscopies. In AcOH−H2O (40:60, v/v) solution, Hg2+ ions coordinate with SQ-1 causing a deaggregation which induces a visual color and absorption spectral changes as well as strong fluorescence. In contrast, the addition of other metals (e.g., Pb2+, Cd2+, Cu2+, Zn2+, Al3+, Ni2+, Co2+, Fe3+, Ca2+, K+, Mg2+, Na+, and Ag+) does not induce these changes at all. Thus SQ-1 is a specific Hg2+ sensing agent due to the inducing deaggregation of the dye molecule by Hg2+.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:1523-7060
1523-7052
DOI:10.1021/ol200024g