Molecular design of fluorene-based polymers and oligomers for organic light-emitting diodes

被引：81

作者：

Lee, SH ^{[1
]}

Tsutsui, T

机构：

[1] Kyushu Univ, CREST, Japan Sci & Technol Corp,JST, Core Res Evolut Sci & Technol, Fukuoka 8168580, Japan

[2] Kyushu Univ, Grad Sch Engn Sci, Dept Appl Sci Elect & Mat, Fukuoka 8168580, Japan

来源：

THIN SOLID FILMS | 2000年 / 363卷 / 1-2期

基金：

日本科学技术振兴机构;

关键词：

well-defined monodisperse oligomer; repetitive divergent approach; pi-pi stacking interaction;

D O I：

10.1016/S0040-6090(99)00997-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three kinds of well-defined monodisperse oligo(9.9-bis-n-hexylfluorene-2,7-diyl)s (n = 2, 3, 4) were prepared by repetitive divergent synthesis starting from 2-bromo-9,9-bis-n-hexylfluorene, 2,7-dibromo-9,9-bis-n-hexylfluorene, and 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9,9-bis-n-hexylfluorene and using Pd(0)-catalyzed cross-coupling reaction. These oligofluorenes were fully characterized with H-1- and C-13-NMR, and FAB-MS measurement. In both solution and film, absorption and photoluminescence (PL) spectra of these oligofluorenes showed red shift as the rod length increases. In the case of PL spectrum of the tetramer (5), it showed two characteristic peaks at 422 and 438 nm in film. The PL intensity at 422 nm can be explained in terms of pi-pi stacking interaction between fluorene rings in the tetramer (5). (C) 2000 Published by Elsevier Science S.A. All rights reserved.

引用

页码：76 / 80

页数：5

共 6 条

[1] Polyfluorene derivatives: Effective conjugation lengths from well-defined oligomers [J].