Photoinduced changes of absorption and circular dichroism in a chiral nematic phase containing a photochromic fulgide

Mesophases composed of a nematic mixture (ZLI1132) alone or with a chiral inductor (twisted nematic phase) were doped with a photochromic furylfulgide (FFU) and irradiated with visible and UV light. FFU shows great fatigue resistance and high repeatability of photochromic cycles in these media. Quan...

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Autores principales: Bossi, M.L., Rodríguez, J.B., Aramendía, P.F.
Formato: JOUR
Materias:
Circular dichroism
Fulgides
Liquid crystals
Memories and data storage
Photochromism
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_10106030_v179_n1-2_p35_Bossi
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_10106030_v179_n1-2_p35_Bossi2023-10-03T15:56:00Z Photoinduced changes of absorption and circular dichroism in a chiral nematic phase containing a photochromic fulgide Bossi, M.L. Rodríguez, J.B. Aramendía, P.F. Circular dichroism Fulgides Liquid crystals Memories and data storage Photochromism Mesophases composed of a nematic mixture (ZLI1132) alone or with a chiral inductor (twisted nematic phase) were doped with a photochromic furylfulgide (FFU) and irradiated with visible and UV light. FFU shows great fatigue resistance and high repeatability of photochromic cycles in these media. Quantum yields for the photoconversions are very similar to values previously reported in solution. Beside from the photochromic changes in absorption spectra, a great and reversible circular dichroism change in the chiral nematic phase was observed in the visible absorption band of the cyclic isomeric form of FFU upon UV irradiation. This change is due to the mesophase-induced chiral absorption. The potential of this signal for information storage is discussed. © 2005 Elsevier B.V. All rights reserved. Fil:Bossi, M.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Rodríguez, J.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Aramendía, P.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10106030_v179_n1-2_p35_Bossi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Circular dichroism
Fulgides
Liquid crystals
Memories and data storage
Photochromism
spellingShingle Circular dichroism
Fulgides
Liquid crystals
Memories and data storage
Photochromism
Bossi, M.L.
Rodríguez, J.B.
Aramendía, P.F.
Photoinduced changes of absorption and circular dichroism in a chiral nematic phase containing a photochromic fulgide
topic_facet Circular dichroism
Fulgides
Liquid crystals
Memories and data storage
Photochromism
description Mesophases composed of a nematic mixture (ZLI1132) alone or with a chiral inductor (twisted nematic phase) were doped with a photochromic furylfulgide (FFU) and irradiated with visible and UV light. FFU shows great fatigue resistance and high repeatability of photochromic cycles in these media. Quantum yields for the photoconversions are very similar to values previously reported in solution. Beside from the photochromic changes in absorption spectra, a great and reversible circular dichroism change in the chiral nematic phase was observed in the visible absorption band of the cyclic isomeric form of FFU upon UV irradiation. This change is due to the mesophase-induced chiral absorption. The potential of this signal for information storage is discussed. © 2005 Elsevier B.V. All rights reserved.
format JOUR
author Bossi, M.L.
Rodríguez, J.B.
Aramendía, P.F.
author_facet Bossi, M.L.
Rodríguez, J.B.
Aramendía, P.F.
author_sort Bossi, M.L.
title Photoinduced changes of absorption and circular dichroism in a chiral nematic phase containing a photochromic fulgide
title_short Photoinduced changes of absorption and circular dichroism in a chiral nematic phase containing a photochromic fulgide
title_full Photoinduced changes of absorption and circular dichroism in a chiral nematic phase containing a photochromic fulgide
title_fullStr Photoinduced changes of absorption and circular dichroism in a chiral nematic phase containing a photochromic fulgide
title_full_unstemmed Photoinduced changes of absorption and circular dichroism in a chiral nematic phase containing a photochromic fulgide
title_sort photoinduced changes of absorption and circular dichroism in a chiral nematic phase containing a photochromic fulgide
url http://hdl.handle.net/20.500.12110/paper_10106030_v179_n1-2_p35_Bossi
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AT rodriguezjb photoinducedchangesofabsorptionandcirculardichroisminachiralnematicphasecontainingaphotochromicfulgide
AT aramendiapf photoinducedchangesofabsorptionandcirculardichroisminachiralnematicphasecontainingaphotochromicfulgide
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