A new ratiometric fluorescent chemodosimeter based on an ICT modulation for the detection of Hg2+
2016 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 230, 639-644 p.Article in journal (Refereed) PublishedText
We design and synthesize a new ratiometric fluorescent chemodosimeter (S1) for the selective and sensitive detection of Hg2+. Upon addition of Hg2+, the emission of the S1 exhibits a large bathochromic shift from 393 to 515 nm (up to 122 nm) which is ascribed to an intramolecular charge transfer process in the resultant. The Hg2+-induced dethioacetalization for sensing mechanism has been demonstrated by using high-performance liquid chromatography analysis of the sensing process. The interference experiments further demonstrate that S1 exhibits very high selectivity towards Hg2+ over other coexisting cations/anions. Subsequently, a good linearity of the concentrations of Hg2+ (0-15 mu M) vs the ratiometric signals (I-515/I-393) allows a fluorogenic method for the quantitative detection of Hg2+, with the limitation of detection determined to be 5.22 x 10(-7) M. (C) 2016 Elsevier B.V. All rights reserved.
Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2016. Vol. 230, 639-644 p.
Chemodosimeter; Ratiometric fluorescence; Mercury detection; Intramolecular charge transfer; Phenanthroimidazole
IdentifiersURN: urn:nbn:se:liu:diva-128714DOI: 10.1016/j.snb.2016.02.125ISI: 000374329300081OAI: oai:DiVA.org:liu-128714DiVA: diva2:933914
Funding Agencies|National Natural Science Foundation of China ; Foundation of State Key Laboratory of Pollution Control and Resource Reuse, China [PCRRK13024]; Knut and Alice Wallenberg Foundation (KAW) [2012.0083]; Swedish Government strategic faculty grant in material science (SFO, MATLIU) in Advanced Functional Materials (AFM) (VR) [5.1-2015-5959]; International Exchange Program for Graduate Students of Tongji University 2016-06-072016-05-302016-06-21