Donor and Ring‐Fusing Engineering for Far‐Red to Near‐Infrared Triphenylpyrylium Fluorophores with Enhanced Fluorescence Performance for Sensing and Imaging
作者:Si‐Yu Wen、Wei Zhang、Tian‐Bing Ren、Qian‐Ling Zhang、Yu‐Peng Liu、Ling Shi、Rongfeng Hu、Xiao‐Bing Zhang、Lin Yuan
DOI:10.1002/chem.201900246
日期:2019.5.17
TPP‐Fluors demonstrate their biological value as mitochondria‐specific labeling reagents due to their inherently positive nature. In addition, TPP‐Fluors can also be applied to develop ratiometric fluorescent probes, as the electron‐donating ability of the 2,6‐phenyl substituents is closely correlated with their emission wavelength. A proof‐of‐concept ratiometric probe has been developed by derivatizing the
荧光探针由于其灵敏性和技术简便性,已成为生物和疾病相关分析物检测和成像中必不可少的工具。特别是,具有远红外至近红外(FR-NIR)发射的荧光探针对于生物医学应用非常有吸引力。但是,许多可用的FR-NIR荧光团的斯托克斯位移小,有时量子产率低,导致自猝灭和低对比度。在这项工作中,我们描述了基于FR-NIR 2,4,6-三苯基吡啶基荧光团(TPP-Fluors)的合理设计和工程。)借助理论计算。我们的策略是基于给电子取代基和稠合基团附加到2,4,6-三苯基吡啶上。与具有短发射波长,弱量子产率和低化学稳定性的母体TPP相比,所获得的新型TPP荧光灯显示出一些有利的特性,例如长波长发射,大斯托克斯频移,中等至高量子产率以及化学性质。稳定。由于其固有的阳性性质,TPP-Fluor证明了其作为线粒体特异性标记试剂的生物学价值。另外,TPP-Fluors也可以用于开发比例荧光探针,因为2,6-苯基取代基