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A Combination of Selective Light Reflection and Fluorescence Modulation in a Cholesteric Polymer Matrix
Author(s) -
Medvedeva Dasha,
Bobrovsky Alexey,
Boiko Natalia,
Shibaev Valery,
Zavarzin Igor,
Kalik Marina,
Krayushkin Mikhail
Publication year - 2005
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400483
Subject(s) - diarylethene , photochromism , photochemistry , dopant , fluorescence , materials science , förster resonance energy transfer , polymer , chemistry , optics , optoelectronics , doping , physics , composite material
Summary: The phase behavior and optical properties of a cholesteric ternary copolymer, containing nematogenic phenylbenzoate, cholesteric, and photochromic diarylethene side groups, and its mixture with 2 wt.‐% fluorescent dopant were studied. The investigation of the kinetics of a photochemical opening‐cycle process of the photochromic groups in the cholesteric mixture proved the energy transfer from the fluorescent dopant to the photochromic diarylethene groups. It was shown that the fluorescence intensity of the fluorescent dopant could be controlled by the portion of the “closed” form of the diarylethene groups. During the photocyclization of the photochromic groups a “degeneration” of the selective light reflection of the cholesteric matrix is observed.Fluorescence‐resonance energy transfer makes possible the process of photosensitization of the back ring‐opening photoreaction of the photochromic diarylethene groups in the cholesteric polymer matrix.