Dual optical detection of a novel selective mercury sensor based on 7-nitrobenzo-2-oxa-1,3-diazolyl subunits
A novel macromolecule based on 2-[3-(2-aminoethylthio)propylthio]ethanamine covalently bound to two 7-nitrobenzo-2-oxa-1,3-diazolyl moieties was prepared as a fluoroionophore and a chromophore for the selective optical detection of Hg2+. The sensor was prepared in two steps and its fluoroionophoric...
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th-cmuir.6653943832-59072014-08-30T03:23:36Z Dual optical detection of a novel selective mercury sensor based on 7-nitrobenzo-2-oxa-1,3-diazolyl subunits Wanichacheva N. Siriprumpoonthum M. Kamkaew A. Grudpan K. A novel macromolecule based on 2-[3-(2-aminoethylthio)propylthio]ethanamine covalently bound to two 7-nitrobenzo-2-oxa-1,3-diazolyl moieties was prepared as a fluoroionophore and a chromophore for the selective optical detection of Hg2+. The sensor was prepared in two steps and its fluoroionophoric and chromophoric properties toward various transition metal, alkali, and alkali earth cations were investigated. Compound 4 selectively binds Hg2+, and the binding is indicated by both fluorescence quenching and a chromogenic change which can be detected by the naked eye. In an 80:20 acetonitrile/water solvent mixture, 4 acts as an ON-OFF fluorescence switch upon Hg2+ binding, exhibiting efficient quenching and a detection limit of 10-7 M or 20 ppb. © 2009 Elsevier Ltd. All rights reserved. 2014-08-30T03:23:36Z 2014-08-30T03:23:36Z 2009 Article 00404039 10.1016/j.tetlet.2009.01.118 TELEA http://www.scopus.com/inward/record.url?eid=2-s2.0-61349160485&partnerID=40&md5=a7098bee42609479177ba1c543f30327 http://cmuir.cmu.ac.th/handle/6653943832/5907 English |
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A novel macromolecule based on 2-[3-(2-aminoethylthio)propylthio]ethanamine covalently bound to two 7-nitrobenzo-2-oxa-1,3-diazolyl moieties was prepared as a fluoroionophore and a chromophore for the selective optical detection of Hg2+. The sensor was prepared in two steps and its fluoroionophoric and chromophoric properties toward various transition metal, alkali, and alkali earth cations were investigated. Compound 4 selectively binds Hg2+, and the binding is indicated by both fluorescence quenching and a chromogenic change which can be detected by the naked eye. In an 80:20 acetonitrile/water solvent mixture, 4 acts as an ON-OFF fluorescence switch upon Hg2+ binding, exhibiting efficient quenching and a detection limit of 10-7 M or 20 ppb. © 2009 Elsevier Ltd. All rights reserved. |
| format |
Article |
| author |
Wanichacheva N. Siriprumpoonthum M. Kamkaew A. Grudpan K. |
| spellingShingle |
Wanichacheva N. Siriprumpoonthum M. Kamkaew A. Grudpan K. Dual optical detection of a novel selective mercury sensor based on 7-nitrobenzo-2-oxa-1,3-diazolyl subunits |
| author_facet |
Wanichacheva N. Siriprumpoonthum M. Kamkaew A. Grudpan K. |
| author_sort |
Wanichacheva N. |
| title |
Dual optical detection of a novel selective mercury sensor based on 7-nitrobenzo-2-oxa-1,3-diazolyl subunits |
| title_short |
Dual optical detection of a novel selective mercury sensor based on 7-nitrobenzo-2-oxa-1,3-diazolyl subunits |
| title_full |
Dual optical detection of a novel selective mercury sensor based on 7-nitrobenzo-2-oxa-1,3-diazolyl subunits |
| title_fullStr |
Dual optical detection of a novel selective mercury sensor based on 7-nitrobenzo-2-oxa-1,3-diazolyl subunits |
| title_full_unstemmed |
Dual optical detection of a novel selective mercury sensor based on 7-nitrobenzo-2-oxa-1,3-diazolyl subunits |
| title_sort |
dual optical detection of a novel selective mercury sensor based on 7-nitrobenzo-2-oxa-1,3-diazolyl subunits |
| publishDate |
2014 |
| url |
http://www.scopus.com/inward/record.url?eid=2-s2.0-61349160485&partnerID=40&md5=a7098bee42609479177ba1c543f30327 http://cmuir.cmu.ac.th/handle/6653943832/5907 |
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