点击次数：

论文类型： 期刊论文

发表时间： 2018-03-15

发表刊物： JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

收录刊物： SCIE

卷号： 355

期号： ,SI

页面范围： 165-174

ISSN号： 1010-6030

关键字： Dichromate chemosensor; Rhodamine derivatives; Determination of Cr2O72- in water

摘要： The dichromate as an industrial oxidant has a very extensive application. However, as one of the heavy metal elements, chromium has become a great threat to the organism and environment due to its carcinogenicity and mutageicity. So far, there is only a small number of detection and imaging methods for dichromate. In this work, a new fluorescent probe RhoCr for detecting dichromate based on in situ Cr3+-controlled opening of spirolactam-ring in a rhodamine dye after Cr2O72- reduced to Cr3+ by NaHSO3 in solution and self-reduction in organism is reported, which displays a strong enhancement of fluorescence emission (lambda(em) 582 nm), fast response (completed within 2 min) and excellent sensitivity (DL 1.18 nM). RhoCr successfully obtained fluorescence images of the intracellular Cr2O72-. In addition, the effect have been exhibited in tap water and pool water, which will be crucial to the detection of dichromate in the environment. (C) 2017 Elsevier B.V. All rights reserved.