A near-infrared fluorescent probe for rapid detection of hydrogen peroxide in living cells
摘要:
A new near-infrared and colorimetric fluorescent molecular probe was developed for rapid detection of H2O2. The near-infrared fluorescence OFF ON switch is triggered by transformation of phenylboronic acid unit to phenol in the presence of H2O2. No quinone methides are released in this process, which is preferable for in vivo studies. In addition, probe 1 at low concentration exhibits high quality optical imaging during a short period in in vitro cell study. (C) 2015 Elsevier Ltd. All rights reserved.
Dicyanomethylene-4H-pyran-based NIR fluorescent ratiometric chemosensor for pH measurement
作者:Jinfeng Yang、Meng Li、Wei-Hong Zhu
DOI:10.1007/s11164-018-3334-z
日期:2018.7
neutral conditions, DCM-OH shows a long absorption wavelength at 431 nm attributed to the DCM chromophore via the intramolecular charge transfer (ICT), but very weak fluorescence around 574 nm. While pH increases from 7.15 to 11.00, DCM-OH shows a bathochromic absorption band at 574 nm due to the increase of the ICT process from the oxygen anion group, shifting the emission band to the NIR region. A DFT calculation
A ratiometric fluorescent probe for quantification of alkaline phosphatase in living cells
作者:Zhenxing Lu、Jiasheng Wu、Weimin Liu、Guangyou Zhang、Pengfei Wang
DOI:10.1039/c6ra00983b
日期:——
from the probe that changed the ability of the intramolecular charge transfer. The fluorescence intensity ratio displayed a linear relationship against the concentration of ALP in the concentration range from 50 to 200 U L−1. Other biological species, including lysozyme, trypsin, pepsin, acetyl cholinesterase, carboxylesterase, and bovine serumalbumin, did not induce distinct spectral changes of the
具有强分子内电荷转移(ICT)特性的比例荧光探针已设计用于检测碱性磷酸酶(ALP)。在存在ALP的情况下,探针1在荧光光谱中显示了从550 nm到650 nm的显着红移,并且观察到带有等渗点的明显比例信号。光谱变化归因于探针的磷酸基团的水解和裂解,从而改变了分子内电荷转移的能力。在50至200 UL -1的浓度范围内,荧光强度比与ALP的浓度呈线性关系。。其他生物物种,包括溶菌酶,胰蛋白酶,胃蛋白酶,乙酰胆碱酯酶,羧酸酯酶和牛血清白蛋白,均未引起探针的明显光谱变化,表明其对ALP的选择性感应能力。此外,探针1也已成功应用于活细胞中内源性ALP活性成像。
A fluorogenic and red-shifted diphenyl phosphinate-based probe for selective peroxynitrite detection as demonstrated in fixed cells
作者:Sandip V. Mulay、Youngsam Kim、Kyung Jin Lee、Tesla Yudhistira、Hee-Sung Park、David G. Churchill
DOI:10.1039/c7nj02530k
日期:——
A new dicyanomethylene-4H-pyran-based fluorescent probe has been designed, synthesized and characterized. It shows selective “TURN-ON” fluorescence response upon reaction with ONOO−.