Fastest non-ionic azo dyes and transfer of their thermal isomerisation kinetics into liquid-crystalline materials

Push-pull bithienylpyrrole-based azo dyes exhibit thermal isomerisation rates as fast as 1.4 μs in acetonitrile at 298 K becoming, thus, the fastest neutral azo dyes reported so far. These remarkably low relaxation times can be transferred into liquid-crystalline matrixes enabling light-triggered os...

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Bibliographic Details
Main Author: Garcia-Amorós, J. (author)
Other Authors: Castro, M. C. R. (author), Coelho, P. (author), Raposo, M. Manuela M. (author), Velasco, D. (author)
Format: article
Language:eng
Published: 2016
Subjects:
Photochromism
Azo dyes
Heterocycles
Synthesis
Liquid-crystalline materials
Molecular switches
Push-pull heterocyclic systems
Ciências Naturais::Ciências Químicas
Science & Technology
Online Access:http://hdl.handle.net/1822/44225
Country:Portugal
Oai:oai:repositorium.sdum.uminho.pt:1822/44225
Description
Summary:Push-pull bithienylpyrrole-based azo dyes exhibit thermal isomerisation rates as fast as 1.4 μs in acetonitrile at 298 K becoming, thus, the fastest neutral azo dyes reported so far. These remarkably low relaxation times can be transferred into liquid-crystalline matrixes enabling light-triggered oscillations in the optical density of the final material up to 11 kHz under ambient conditions.

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