Photophysical properties of 1,3,6,8-tetrakis(arylethynyl)pyrenes with donor or acceptor substituents: their fluorescence solvatochromism and lightfastness
We prepared a series of 1,3,6,8-tetrakis(arylethynyl)pyrenes with donor or acceptor substituents and investigated their photophysical properties. Solvent polarity hardly affected on the UV/vis spectra of all of the tetrakis(arylethynyl)pyrenes used in this study. On the other hand, electron-donating groups, NMe2 and NPh2 groups imparted fluorescence solvatochromicity to the skeleton by intramolecular
Photophysical properties of 1,3,6,8-tetraarylpyrenes and their cation radicals
作者:Vijay S. Vyas、Sergey V. Lindeman、Rajendra Rathore
DOI:10.1016/j.jphotochem.2019.01.014
日期:2019.4
groups and the pyrene core. Electronic absroption spectra of the cationradicals generated in solution by the single electron oxidation of pyrenes reaffirmed the coupling of the aryl rings with the pyrene. The aryl groups at 1,3,6,8-positions completely inhibit the π-stacking of pyrene core in solution. Crystal structure of the cationradical salt of tetraphenyl shows charge delocalization between neutral
Pyrene‐Based D‐A Molecules as Efficient Heterogeneous Catalysts for Visible‐Light‐Induced Aerobic Organic Transformations
作者:Zhihui Jiang、Wenhao Sun、Zhenyan Yang、Hui Pan、Zubing Tang、Wei Shi、Yonggang Xiang、Dingce Yan、Huailong Teng
DOI:10.1002/cssc.202202082
日期:2023.3.8
efficient heterogeneous photocatalysts in photocatalytic oxidative dehydrogenation coupling of benzylamine, oxidation of thioethers and arylboronic acids. These simply structured molecules could be recycled for many rounds with slight catalytic activity degradation. Large scale (1 mol) reaction of benzylamine coupling proceeded smoothly under the standard conditions.