Sensitive Near-Infrared Fluorescent Probes for Thiols Based on SeN Bond Cleavage: Imaging in Living Cells and Tissues
作者:Rui Wang、Lingxin Chen、Ping Liu、Qin Zhang、Yunqing Wang
DOI:10.1002/chem.201200671
日期:2012.9.3
Cy‐NiSe and Cy‐TfSe were designed and synthesized as sensitive near‐infrared (NIR) fluorescent probes for detecting thiols on the basis of SeN bond cleavage both in cells and in tissues. Since a donor‐excited photoinduced electron transfer (d‐PET) process occurs between the modulator and the fluorophore, Cy‐NiSe and Cy‐TfSe have weak fluorescence. On titration with glutathione, the free dye exhibits
Cy-NiSe和Cy-TfSe被设计并合成为敏感的近红外(NIR)荧光探针,用于基于细胞和组织中SeN键的裂解来检测硫醇。由于在调制器和荧光团之间发生了供体激发的光诱导电子转移(d-PET)过程,因此Cy-NiSe和Cy-TfSe的荧光很弱。用谷胱甘肽滴定时,游离染料显示出显着的荧光增强。与其他相关生物物种相比,这两种探针对硫醇敏感且具有选择性。它们可以在pH 7.4时快速起作用,并且其发射位于NIR区域。共聚焦成像证实Cy-NiSe和Cy-TfSe可用于检测活细胞和组织中的硫醇。