Molecular design principles for achieving strong chiroptical properties of fluorene copolymers in thin films

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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.

Originele taal-2Engels
Pagina's (van-tot)6633-6641
Aantal pagina's9
TijdschriftChemistry of Materials
Volume31
Nummer van het tijdschrift17
DOI's
StatusGepubliceerd - 10 sep 2019

Vingerafdruk

Organic light emitting diodes (OLED)
Copolymers
Crystalline materials
Thin films
Photonic devices
Liquid crystal polymers
Conjugated polymers
Liquids
Light polarization
Photoluminescence
fluorene

Citeer dit

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title = "Molecular design principles for achieving strong chiroptical properties of fluorene copolymers in thin films",
abstract = "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.",
author = "Chidambar Kulkarni and {van Son}, {Martin H.C.} and {Di Nuzzo}, Daniele and Meskers, {Stefan C.J.} and Palmans, {Anja R.A.} and E.W. Meijer",
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Molecular design principles for achieving strong chiroptical properties of fluorene copolymers in thin films. / Kulkarni, Chidambar; van Son, Martin H.C.; Di Nuzzo, Daniele; Meskers, Stefan C.J.; Palmans, Anja R.A.; Meijer, E.W. (Corresponding author).

In: Chemistry of Materials, Vol. 31, Nr. 17, 10.09.2019, blz. 6633-6641.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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