Red-Emitting Tetracoordinate Organoboron Chelates: Synthesis, Photophysical Properties, and Fluorescence Microscopy
作者:Vânia F. Pais、Pedro Ramírez-López、Antonio Romero-Arenas、Daniel Collado、Francisco Nájera、Ezequiel Pérez-Inestrosa、Rosario Fernández、José M. Lassaletta、Abel Ros、Uwe Pischel
DOI:10.1021/acs.joc.6b01569
日期:2016.10.21
absorption and emission spectra. In the most interesting cases, the spectra were red-shifted to maximum absorbance at wavelengths longer than 500 nm and emission maxima between 620 and 660 nm. The pronounced intramolecular charge-transfer character of the dyes yielded large Stokes shifts (3500–5100 cm–1), while maintaining appreciable fluorescence quantum yields of up to 0.2 for emission maxima longer than
制备了七个具有杂联二芳基N,O-或N,N-螯合配体的四配位有机硼荧光团并进行了光物理表征(在甲苯中)。杂芳族部分的电子变化为微调UV / vis吸收和发射光谱提供了一种手段。在最有趣的情况下,光谱在超过500 nm的波长处发生红移,达到最大吸收度,并且发射最大值在620至660 nm之间。染料具有明显的分子内电荷转移特性,可产生较大的斯托克斯频移(3500-5100 cm -1),同时对于大于600 nm的最大发射,仍可保持高达0.2的可观荧光量子产率。染料的亲脂性使其能够在共聚焦荧光显微镜成像中用作囊泡亚结构的染色剂。