Alkynylpyrenes as Improved Pyrene-Based Biomolecular Probes with the Advantages of High Fluorescence Quantum Yields and Long Absorption/Emission Wavelengths
a new class of pyrene-based biomolecular probes. The absorption maxima of the alkynylpyrenes were seen to be shifted to longer wavelengths compared with those of the unsubstituted parent pyrene. Fluorescencequantumyields of the alkynylpyrenes dramatically increased up to 0.99 in ethanol, and only slight quenching of the fluorescence occurred even under aerated conditions. The alkynylpyrenes have
Effects of substituents on absorption and fluorescence properties of trimethylsilylethynyl- and tert-butylethynyl-pyrenes
作者:Hajime Maeda、Ryota Ueno、Taniyuki Furuyama、Masahito Segi
DOI:10.1016/j.jphotochem.2020.112428
日期:2020.4
silyl derivative having a formyl group shifted to longer wavelengths as the solvent polarity increased, whereas that of the carbon analog shifted to shorter wavelengths. On the other hand, in the solventdependence of fluorescence, both fluorescence of them shifted to longer wavelengths as the polarity of the solvent increased. Fluorescence spectra of pyrene derivatives synthesized in this study at saturated
研究了在三甲基甲硅烷基乙炔基和叔丁基乙炔基-吡啶的1-位引入的取代基对吸收和荧光性质的影响。荧光强度为1.0×10 –5 M CH 2 Cl 2这些pyr衍生物的溶液明显大于that。随着溶剂极性的增加,具有甲酰基的甲硅烷基衍生物的吸收移至更长的波长,而碳类似物的吸收移至较短的波长。另一方面,在荧光的溶剂依赖性中,随着溶剂的极性增加,它们的两个荧光都移向更长的波长。饱和浓度的CH 2 Cl 2中本研究合成的saturated衍生物的荧光光谱与未取代的pyr相比,在更长的波长范围内表现出准分子发射。在溶液和固态下,硅类似物的荧光量子产率均高于相应碳类似物的荧光量子产率。从分子轨道的计算结果可以看出,the环上1-位的取代基对吸收和荧光性质的影响可以通过与各个电子跃迁相对应的分子轨道的性质来解释。