Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 161, Issue 1, Pages 661-668Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2011.10.087
Keywords
Chemodosimeter; Thiocarbonyl quinacridone; Hg2+; Turn-on type fluorescent sensor
Funding
- NSFC/China [2116110444, 21172073]
- National Basic Research 973 Program [2011CB808400]
- Fundamental Research Funds for the Central Universities [WJ0913001]
- Scientific Committee of Shanghai [10520709700]
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Two new thiocarbonyl quinacridone compounds (TQA-H and TQA-TPA) were designed and synthesized, and their fluorescent behaviors toward various metal ions were investigated. The measurements of sensing behavior to various metal ions reveal that both of them are excellent turn on fluorescent chemosensors for mercury ion. Addition of Hg2+ to the chloroform solution of TQA-TPA gave the lowest detection limit at 4.7 nM. In addition, colorimetric changes of sensors interacted with Hg2+ are also successfully demonstrated. The recognition is attributed to Hg2+-induced conversion of thiocarbonyl quinacridones into their carbonyl analogues. (C) 2011 Elsevier B.V. All rights reserved.
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