作者:Haoke Zhang、Xiaoyan Zheng、Ni Xie、Zikai He、Junkai Liu、Nelson L. C. Leung、Yingli Niu、Xuhui Huang、Kam Sing Wong、Ryan T. K. Kwok、Herman H. Y. Sung、Ian D. Williams、Anjun Qin、Jacky W. Y. Lam、Ben Zhong Tang
DOI:10.1021/jacs.7b08592
日期:2017.11.15
π-Bonds connected with aromatic rings were generally believed as the standard structures for constructing highly efficient fluorophores. Materials without these typical structures, however, exhibited only low fluorescence quantum yields and emitted in the ultraviolet spectral region. In this work, three molecules, namely bis(2,4,5-trimethylphenyl)methane, 1,1,2,2-tetrakis(2,4,5-trimethylphenyl)ethane
与芳环相连的π-键通常被认为是构建高效荧光团的标准结构。然而,没有这些典型结构的材料仅表现出低的荧光量子产率并在紫外光谱区域发射。在这项工作中,三个分子,即双(2,4,5-三甲基苯基)甲烷、1,1,2,2-四(2,4,5-三甲基苯基)乙烷和1,1,2,2-四苯基乙烷, 具有非共轭结构和孤立的苯环被合成并系统地研究了它们的光物理性质。有趣的是,这三种分子的发射光谱可以很好地扩展到 600 nm,固态量子产率高达 70%。实验和理论分析证明,“孤立”之间的分子内通过空间共轭