Molecular Design Principles for Achieving Strong Chiroptical Properties of Fluorene Copolymers in Thin Films

被引：72

作者：

Kulkarni, Chidambar ^{[1
]}

van Son, Martin H. C. ^{[1
]}

Di Nuzzo, Daniele ^{[2
]}

Meskers, Stefan C. J. ^{[1
]}

Palmans, Anja R. A. ^{[1
]}

Meijer, E. W. ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Inst Complex Mol Syst, Lab Macromol & Organ Chem, POB 513, NL-5600 MB Eindhoven, Netherlands

[2] Univ Cambridge, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 OHE, England

来源：

CHEMISTRY OF MATERIALS | 2019年 / 31卷 / 17期

基金：

英国工程与自然科学研究理事会;

关键词：

CIRCULARLY-POLARIZED ELECTROLUMINESCENCE; DENDRON SIDE-CHAINS; SUBSTITUTED POLYFLUORENE; CONJUGATED POLYMER; LIGHT; SEMICONDUCTORS; MORPHOLOGY; SCATTERING; STABILITY; DICHROISM;

D O I：

10.1021/acs.chemmater.9b00601

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Understanding the molecular level origin of chiroptical properties in enantiopure pi-conjugated polymers is essential for tailoring these materials for application in organic light-emitting diodes and photonic devices. Here we have studied poly(9,9'-dialkylfluorene-alt-2,5-dialkoxyphenyl)s as prototypical copolymers to investigate their structure-chiroptical property relationship. The effect of a systematic variation of the location and configuration (S or R) of chiral and achiral side chains in the repeating units on the liquid crystalline ordering and its relationship to chiroptical properties were investigated. The results clearly indicate that enantiopure side chains on the fluorene units are critical for obtaining the cholesteric liquid crystalline ordering and thereby strong chiroptical properties in both absorption and photoluminescence in annealed thin films. Finally, solution-processed organic light-emitting diodes constructed from a liquid crystalline polymer show strong emission of circularly polarized light, demonstrating the potential application of these systems.

引用

页码：6633 / 6641

页数：9

共 72 条

[1] Molecular Weight Optimum in the Mesoscopic Order of Chiral Fluorene (Co)polymer Films [J].