Synthesis and properties of paramagnetic derivatives of linear and fused polyaromatic compounds
作者:E. V. Tretyakov、T. V. Novikova、V. V. Korolev、O. M. Usov、S. F. Vasilevsky、Yu. N. Molin
DOI:10.1007/bf02495088
日期:2000.8
is an aromatic group, R• is a stable radical center, and Sp is a spacer, were synthesized. The electronic absorption and luminescence spectra of these compounds were examined. The introduction of the paramagnetic dihydroimidazole fragment causes a decrease (10–500-fold) in the quantum yield of luminescence compared to emission of the individual aromatic luminophore. The presence of a radical center
合成了 A-Sp-R• 类型的甲苯、蒽和三联苯的顺磁性衍生物,其中 A 是芳族基团,R• 是稳定的自由基中心,Sp 是间隔基。检查了这些化合物的电子吸收和发光光谱。与单个芳香族发光体的发射相比,顺磁性二氢咪唑片段的引入导致发光量子产率降低(10-500 倍)。(烷烃)•+/-•A-Sp-R• 自由基-离子对中自由基中心 (R•) 的存在导致在重组时产生的发光磁效应消失或快速(纳秒)衰减这些对。