Structural Organization of π Conjugated Highly Luminescent Molecular Material

B. Toudic; P. Limelette; G. Froyer; F. Le Gac; A. Moréac; P. Rabiller

Structural Organization of π Conjugated Highly Luminescent Molecular Material

B. Toudic ¹ P. Limelette ¹ G. Froyer ² F. Le Gac ¹ A. Moréac ¹ P. Rabiller ³

1 GMCM - Groupe matière condensée et matériaux

2 IMN - Institut des Matériaux Jean Rouxel

Abstract : We report on striking evidence for a room temperature structural phase instability in p-hexaphenyl, inducing a nonplanar conformation of the molecules. Solid state proton NMR and single crystal x-ray diffraction allow the analysis of the organization, the individual dynamics and the involved symmetry breaking. The analysis of Raman spectra above and below room temperature reveals a singular behavior suggesting a modification of the overlap between the electronic wave function induced by the non-planarity. These results provide a new basis to answer fundamental issues related to molecular and electronic materials and, in particular, luminescent organic devices.

Document type :

Journal articles

Domain :

Physics [physics] / Condensed Matter [cond-mat] / Materials Science [cond-mat.mtrl-sci]

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https://hal-univ-tours.archives-ouvertes.fr/hal-01870053
Contributor : Patrice Limelette <>
Submitted on : Friday, September 7, 2018 - 10:25:08 AM
Last modification on : Wednesday, July 17, 2019 - 11:16:02 AM
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