A new “turn-on” fluorescent probe, DCM-q, was synthesized for the selectiverecognition of cysteine (Cys). DCM-q was obtained by connecting 2-(2-methyl-4H-chromen-4-ylidene) malononitrile as the fluorophore to a cationic methyl quinoline group by CC bonds. The probe can selectively and sensitively recognize Cys in the presence of Hcy and GSH in DMSO/HEPES (2:8, v/v). We verified the mechanism through
A near-infrared fluorogenic probe with fast response for detecting sodium dithionite in living cells
作者:Xizi Yu、Lie Xiang、Sheng Yang、Shuanglin Qu、Xianqing Zeng、Yibo Zhou、Ronghua Yang
DOI:10.1016/j.saa.2020.118887
日期:2021.1
fluorescence probe is crucial for accurately monitoring sodium dithionite (Na2S2O4, SDT) in biosystems, but the current reported azo-based ones suffers from short excitation/emission wavelengths and relative slow response speed. To address this issue, we herein present a novel near-infrared emissive fluorescence probe for SDT, namely DCM-MQ, consisting of a dicyanomethylene-benzopyran fluorogenic reporter
开发可靠的荧光探针对于精确监测生物系统中的连二亚硫酸钠(Na 2 S 2 O 4,SDT)至关重要,但是目前报道的基于偶氮基的探针受激发/发射波长短且响应速度相对较慢。为了解决这个问题,我们在这里提出了一种用于SDT的新型近红外发射荧光探针,即DCM-MQ,其由二氰基亚甲基-苯并吡喃荧光报告分子和1-甲基喹啉鎓作为识别部分组成。根据具体的还原机制,DCM-MQ表现出对SDT的快速比色和荧光识别(少于3 s),斯托克斯位移(112 nm)大,灵敏度高(检测限为19 nM)。荧光成像结果表明,DCM-MQ具有监测生命系统中SDT的能力。
Selective turn-on near-infrared fluorescence probe for hypoxic tumor cell imaging
作者:Chen Jin、Qiumeng Zhang、Wei Lu
DOI:10.1039/c7ra01466j
日期:——
In this study, we designed a new selective turn on near-infrared fluorescence probe by conjugating (1-methyl-2-nitro-1H-imidazol-5-yl)methanol to DCPO with ether linkage for hypoxic tumor cell imaging.