Sensitive and rapid detection of Cr3+ in live cells by a red turn-on fluorescent probe
摘要:
A new probe RB-CR for the detection of Cr3+ was constructed based on the conjugation between rhodamine B and phenylthiourea. The Cr3+ could trigger opening of the rhodamine spirolactam of RB-CR upon complexation selectively, sensitively and rapidly, resulting in a pronounced enhancement of absorption and fluorescence signal. Further fluorescence imaging study has suggested that RB-CR could be applied as a probe for Cr3+ surveillance in living HepG2 cells with low cytotoxicity, which provide us the feasibility of exploring the Cr3+ recognition process by the turn-on fluorescence response. (C) 2020 Elsevier B.V. All rights reserved.
Highly sensitive and selective turn-on fluorescent chemosensor for Pb2+ and Hg2+ based on a rhodamine–phenylurea conjugate
作者:Zhi-Qiang Hu、Cun-sheng Lin、Xiao-Ming Wang、Lei Ding、Cun-Li Cui、Shu-Feng Liu、Hai Yan Lu
DOI:10.1039/c001587c
日期:——
A novel easily available turn-onfluorescentchemosensor RPU based on a rhodamine-phenylurea conjugate was synthesized, which showed highlyselective and sensitive recognition toward Pb(2+) in CH(3)CN and Hg(2+) in aqueous media over a wide range of tested metal ions with remarkably enhanced fluorescent intensities and also clear color changes from colorless to pink.