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, Mariano Luis, Rodríguez, Juan Bautista, Aramendía, Pedro Francisco
Publicado:	2006
Materias:	Circular dichroism Fulgides Liquid crystals Memories and data storage Photochromism
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10106030_v179_n1-2_p35_Bossi http://hdl.handle.net/20.500.12110/paper_10106030_v179_n1-2_p35_Bossi
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_10106030_v179_n1-2_p35_Bossi
record_format	dspace
spelling	paper:paper_10106030_v179_n1-2_p35_Bossi2023-06-08T15:59:35Z Photoinduced changes of absorption and circular dichroism in a chiral nematic phase containing a photochromic fulgide Bossi, Mariano Luis Rodríguez, Juan Bautista Aramendía, Pedro Francisco 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. 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10106030_v179_n1-2_p35_Bossi 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, Mariano Luis Rodríguez, Juan Bautista Aramendía, Pedro Francisco 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.
author	Bossi, Mariano Luis Rodríguez, Juan Bautista Aramendía, Pedro Francisco
author_facet	Bossi, Mariano Luis Rodríguez, Juan Bautista Aramendía, Pedro Francisco
author_sort	Bossi, Mariano Luis
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
publishDate	2006
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10106030_v179_n1-2_p35_Bossi http://hdl.handle.net/20.500.12110/paper_10106030_v179_n1-2_p35_Bossi
work_keys_str_mv	AT bossimarianoluis photoinducedchangesofabsorptionandcirculardichroisminachiralnematicphasecontainingaphotochromicfulgide AT rodriguezjuanbautista photoinducedchangesofabsorptionandcirculardichroisminachiralnematicphasecontainingaphotochromicfulgide AT aramendiapedrofrancisco photoinducedchangesofabsorptionandcirculardichroisminachiralnematicphasecontainingaphotochromicfulgide
_version_	1768545937548902400

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

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