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Hg(II) ion specific dual mode signalling in a thiophene derivatized rhodamine based probe and their complexation cooperativity

Paper ID Volume ID Publish Year Pages File Format Full-Text
27066 43998 2012 8 PDF Available
Title
Hg(II) ion specific dual mode signalling in a thiophene derivatized rhodamine based probe and their complexation cooperativity
Abstract

The rhodamine based chemosensor 1 exhibited highly selective and sensitive detection of Hg(II) ion in MeCN–H2O mixture observable through amplified absorption and emission signals with a colour change from colourless to pink. Its thiophenyl subunit plays a predominant role in observed allosteric cooperativity in binding of both the Hg(II) ions of its 1:2 (L:M) complex stoichiometry. The anion induced ‘turn-off’ signalling responses of the Hg(II)-complex of 1 and subsequent ‘turn-on’ responses with further addition of Hg(II) here demonstrated its repetitive usability as a probe for Hg(II) ion detection.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► 1 responds to highly selective and sensitive detection of Hg(II) ion. ► Its thiophenyl subunit contributes to allosteric cooperativity in binding of both Hg(II) ions. ► The first Hg(II) ion binds to probe along with thiophenyl S atom and promotes a faster binding of second one. ► The Hg(II) induced turn-on, then anion induced ‘turn-off’ signalling responses demonstrate its repetitive usability.

Keywords
Signalling probe; Chromogenic; Fluorogenic; Mercury specificity; Rhodamine delactonization
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Hg(II) ion specific dual mode signalling in a thiophene derivatized rhodamine based probe and their complexation cooperativity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 240, 15 July 2012, Pages 42–49
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us