Strongly Emissive and Photostable Four‐Coordinate Organoboron N,C Chelates and Their Use in Fluorescence Microscopy
作者:Vânia F. Pais、María M. Alcaide、Rocío López‐Rodríguez、Daniel Collado、Francisco Nájera、Ezequiel Pérez‐Inestrosa、Eleuterio Álvarez、José M. Lassaletta、Rosario Fernández、Abel Ros、Uwe Pischel
DOI:10.1002/chem.201501626
日期:2015.10.19
Six strongly fluorescent four‐coordinate organoboron N,C chelates containing an aryl isoquinoline skeleton were prepared. Remarkably, the fluorescence quantum yields reach values of up to 0.74 in oxygen‐free toluene. The strong BN interaction was corroborated by the single‐crystal X‐ray analysis of two dyes. The intramolecular charge‐transfer character of the fluorophores was evidenced by solvatochromism
制备了六种含有芳基异喹啉骨架的强荧光四配位有机硼N,C螯合物。值得注意的是,在无氧甲苯中,荧光量子产率高达0.74。强乙通过两种染料的单晶X射线分析证实了N的相互作用。在PCM(甲苯)/ CAM-B3LYP / 6-311 ++ G(2d,p)// PCM(甲苯)/ B3LYP上通过溶剂变色研究和随时间变化的DFT计算证明了荧光团的分子内电荷转移特性。 / 6‐311G(2d,p)的理论水平。这些化合物兼具高化学稳定性和高光稳定性,尤其是在配备有供电子取代基时。强烈的荧光和较大的斯托克斯频移预示了这些化合物可用于共聚焦荧光显微镜检查。N13小鼠小胶质细胞系的成像证明了这一点。此外,显着的双光子吸收截面(高达61 GM)允许在近红外区域(> 800 nm)使用激发波长。