不对称1,3 - 二芳基 -β- 二酮的发射行为：一个完美揭示分子构象对有机固体发光影响的模型。
Emission behaviors of unsymmetrical 1,3-diaryl-β-diketones: a model perfectly disclosing the effect of molecular conformation on luminescence of organic solids.
作者信息
Cheng Xiao, Li Feng, Han Shenghua, Zhang Yufei, Jiao Chuanjun, Wei Jinbei, Ye Kaiqi, Wang Yue, Zhang Hongyu
机构信息
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Avenue, Changchun 130012, P. R. China.
出版信息
Sci Rep. 2015 Mar 16;5:9140. doi: 10.1038/srep09140.
A series of unsymmetrical 1,3-diaryl-β-diketones 1-6 displaying molecular conformation-dependent fluorescence quantum yields have been synthesized. Crystals with planar molecular conformation such as 1, 2, 3 and 4 are highly fluorescent (φf: 39-53%), and the one holding slightly twisted conformation (5) is moderately luminescent (φf = 17%), while crystal 6 possessing heavily bent structure is completely nonluminous (φf ~ 0). The distinct fluorescence efficiencies are ascribed to their different molecular conformations, since all the crystals hold the same crystal system, space group and crystal packing structures. Additionally, the fluorescent crystals 1-5 display low threshold amplified spontaneous emission (ASE) with small full widths at half-maximum (FWHM: 3-7 nm), indicating their potential as candidates for organic crystal lasing devices.
一系列具有依赖于分子构象的荧光量子产率的不对称1,3 - 二芳基-β-二酮1 - 6已被合成。具有平面分子构象的晶体，如1、2、3和4，具有高荧光性（φf：39 - 53%），而具有轻微扭曲构象的晶体（5）具有中等发光性（φf = 17%），而具有严重弯曲结构的晶体6则完全不发光（φf ~ 0）。由于所有晶体具有相同的晶体系统、空间群和晶体堆积结构，其不同的荧光效率归因于它们不同的分子构象。此外，荧光晶体1 - 5显示出低阈值放大自发辐射（ASE），半高宽较小（FWHM：3 - 7 nm），表明它们有潜力作为有机晶体激光器件的候选材料。
Zotero 插件