Violet-to-Blue Tunable Emission of Aryl-Substituted Dispirofluorene-Indenofluorene Isomers by Conformationally-Controllable Intramolecular Excimer Formation
作者:Damien Thirion、Cyril Poriel、Rémi Métivier、Joëlle Rault-Berthelot、Frédéric Barrière、Olivier Jeannin
DOI:10.1002/chem.201100971
日期:2011.9.5
(2,1‐a)‐DSF‐IF (2) is discussed in terms of intramolecular π–π interactions occurring in (2,1‐a)‐DSF‐IF (2) leading to conformationally‐controllable intramolecular excimer formation. Indeed, the original geometry of the (2,1‐a)‐DSF‐IF (2) family, with face‐to‐face “aryl‐fluorene‐aryl” moieties, leads to remarkable excimer emission through intramolecular π–π interactions in the excited state. Furthermore
DiSpiroFluorene-IndenoFluorene(DSF-IF)两个位置异构体系列,即dispiro [2,7-diarylfluorene-9',6,9'',12-indeno [1,2- b ]芴],(1,2- b)-DSF-IFs 1和dispiro [2,7-二芳基芴-9',6,9'',12-茚并[ 2,1- a ]芴],(2,1- a)-DSF-IFs 2已经合成。这些紫色至蓝色荧光发射体具有一个3π-2-螺架构,其通过两个螺联合机连接两个不同的茚并芴核,即(1,2- b)- IF或(2,1-一个)-IF和2,7-取代的二芳基-芴单元。由于它们的几何外形不同,这两个位置异构体家族表现出截然不同的特性。(1,2 - b)-DSF-IF(1)和(2,1- a)-DSF-IF(2)之间观察到的显着差异是根据发生在( 2,1-一个)-DSF-IF(2),导致构象可控分子内受激形成。实际上,(2