We developed a reversible fluorescent probe for sulfane sulfur. This probe enabled us to monitor concentration changes of sulfane sulfur.
我们开发了一种可逆荧光探针,用于检测硫醚硫的浓度变化。
Mitochondria-Anchored Colorimetric and Ratiometric Fluorescent Chemosensor for Visualizing Cysteine/Homocysteine in Living Cells and <i>Daphnia magna</i> Model
Cysteine (Cys) and homocysteine (Hcy) are essential for maintaining the cellular redox homeostasis and play critical roles in pathological and physiological processes. The development of Cys/Hcy-specific responsive fluorescent probes that are independent of the surrounding environment, equipment, and abundant endogenous GSH is critical to accurately investigate the roles of Cys/Hcy in living biological
A 4-methoxythiophenol-substituted pyronin dye 1 was exploited as reaction-type fluorescent probe for biothiols Cys/Hcy and GSH. The probe itself is nonfluorescent due to the photoinduced electron transfer (PET) process. The Cys (or Hcy)-induced substitution–rearrangement cascade reaction and GSH-induced substitution reaction with the probe lead to the corresponding aminopyronin and thiopyronin dyes with distinct photophysical properties, enabling Cys/Hcy and GSH to be detected from visible and near-infrared (NIR) emission channels, respectively, in pure PB buffer with relatively fast kinetics and obvious fluorescence turn-on response. Assisted by laser scanning confocal microscope, we also demonstrated that probe 1 could simultaneously sense Cys/Hcy and GSH in B16 cells in multicolor imaging.
Near-Infrared Phosphorus-Substituted Rhodamine with Emission Wavelength above 700 nm for Bioimaging
作者:Xiaoyun Chai、Xiaoyan Cui、Baogang Wang、Fan Yang、Yi Cai、Qiuye Wu、Ting Wang
DOI:10.1002/chem.201502921
日期:2015.11.16
the region above700nm, with bathochromic shifts of 140 and 40 nm relative to rhodamine and silicon‐substituted rhodamine, respectively. Other advantageous properties of the rhodamine family, including high molar extinction coefficient, considerable quantum efficiency, high water solubility, pH‐independent emission, great tolerance to photobleaching, and low cytotoxicity, stay intact in PR. Given these