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

Chidambar Kulkarni | Zendy; Martin H. C. van Son | Zendy; Daniele Di Nuzzo | Zendy; Stefan C. J. Meskers | Zendy; Anja R. A. Palmans | Zendy; E. W. Meijer | Zendy

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

Author(s) -

Chidambar Kulkarni,

Martin H. C. van Son,

Daniele Di Nuzzo,

Stefan C. J. Meskers,

Anja R. A. Palmans,

E. W. Meijer

Publication year - 2019

Publication title -

chemistry of materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.741

H-Index - 375

eISSN - 1520-5002

pISSN - 0897-4756

DOI - 10.1021/acs.chemmater.9b00601

Subject(s) - fluorene , materials science , enantiopure drug , photoluminescence , copolymer , side chain , oled , polymer , liquid crystalline , conjugated system , thin film , absorption (acoustics) , molecular engineering , optoelectronics , liquid crystal , nanotechnology , organic chemistry , chemistry , enantioselective synthesis , composite material , layer (electronics) , catalysis

Understanding the molecular level origin of chiroptical properties in enantiopure π-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.

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