Liquid crystalline dihydroazulene photoswitches

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Standard

Liquid crystalline dihydroazulene photoswitches. / Petersen, Anne Ugleholdt; Jevric, Martyn; Mandle, Richard J.; Davis, Edward J.; Cowling, Stephen J.; Goodby, John W.; Nielsen, Mogens Brøndsted.

I: R S C Advances, Bind 5, Nr. 109, 2015, s. 89731-89744.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Petersen, AU, Jevric, M, Mandle, RJ, Davis, EJ, Cowling, SJ, Goodby, JW & Nielsen, MB 2015, 'Liquid crystalline dihydroazulene photoswitches', R S C Advances, bind 5, nr. 109, s. 89731-89744. https://doi.org/10.1039/C5RA18649H

APA

Petersen, A. U., Jevric, M., Mandle, R. J., Davis, E. J., Cowling, S. J., Goodby, J. W., & Nielsen, M. B. (2015). Liquid crystalline dihydroazulene photoswitches. R S C Advances, 5(109), 89731-89744. https://doi.org/10.1039/C5RA18649H

Vancouver

Petersen AU, Jevric M, Mandle RJ, Davis EJ, Cowling SJ, Goodby JW o.a. Liquid crystalline dihydroazulene photoswitches. R S C Advances. 2015;5(109):89731-89744. https://doi.org/10.1039/C5RA18649H

Author

Petersen, Anne Ugleholdt ; Jevric, Martyn ; Mandle, Richard J. ; Davis, Edward J. ; Cowling, Stephen J. ; Goodby, John W. ; Nielsen, Mogens Brøndsted. / Liquid crystalline dihydroazulene photoswitches. I: R S C Advances. 2015 ; Bind 5, Nr. 109. s. 89731-89744.

Bibtex

@article{5948dc31feb146bf8101676c940530a4,
title = "Liquid crystalline dihydroazulene photoswitches",
abstract = "A large selection of photochromic dihydroazulene (DHA) molecules incorporating various substituents at position 2 of the DHA core was prepared and investigated for their ability to form liquid crystalline phases. Incorporation of an octyloxy-substituted biphenyl substituent resulted in nematic phase behavior and it was possible to convert one such compound partly into its vinylheptafulvene (VHF) isomer upon irradiation with light when in the liquid crystalline phase. This conversion resulted in an increase in the molecular alignment of the phase. In time, the meta-stable VHF returns to the DHA where the alignment is maintained. The systematic structural variation has revealed that a biaryl spacer between the DHA and the alkyl chain is needed for liquid crystallinity and that the one aromatic ring in the spacer cannot be substituted by a triazole. This work presents an important step towards employing the dihydroazulene-vinylheptafulvene photo/thermoswitch in photoactive liquid crystalline materials.",
author = "Petersen, {Anne Ugleholdt} and Martyn Jevric and Mandle, {Richard J.} and Davis, {Edward J.} and Cowling, {Stephen J.} and Goodby, {John W.} and Nielsen, {Mogens Br{\o}ndsted}",
year = "2015",
doi = "10.1039/C5RA18649H",
language = "English",
volume = "5",
pages = "89731--89744",
journal = "RSC Advances",
issn = "2046-2069",
publisher = "RSC Publishing",
number = "109",

}

RIS

TY - JOUR

T1 - Liquid crystalline dihydroazulene photoswitches

AU - Petersen, Anne Ugleholdt

AU - Jevric, Martyn

AU - Mandle, Richard J.

AU - Davis, Edward J.

AU - Cowling, Stephen J.

AU - Goodby, John W.

AU - Nielsen, Mogens Brøndsted

PY - 2015

Y1 - 2015

N2 - A large selection of photochromic dihydroazulene (DHA) molecules incorporating various substituents at position 2 of the DHA core was prepared and investigated for their ability to form liquid crystalline phases. Incorporation of an octyloxy-substituted biphenyl substituent resulted in nematic phase behavior and it was possible to convert one such compound partly into its vinylheptafulvene (VHF) isomer upon irradiation with light when in the liquid crystalline phase. This conversion resulted in an increase in the molecular alignment of the phase. In time, the meta-stable VHF returns to the DHA where the alignment is maintained. The systematic structural variation has revealed that a biaryl spacer between the DHA and the alkyl chain is needed for liquid crystallinity and that the one aromatic ring in the spacer cannot be substituted by a triazole. This work presents an important step towards employing the dihydroazulene-vinylheptafulvene photo/thermoswitch in photoactive liquid crystalline materials.

AB - A large selection of photochromic dihydroazulene (DHA) molecules incorporating various substituents at position 2 of the DHA core was prepared and investigated for their ability to form liquid crystalline phases. Incorporation of an octyloxy-substituted biphenyl substituent resulted in nematic phase behavior and it was possible to convert one such compound partly into its vinylheptafulvene (VHF) isomer upon irradiation with light when in the liquid crystalline phase. This conversion resulted in an increase in the molecular alignment of the phase. In time, the meta-stable VHF returns to the DHA where the alignment is maintained. The systematic structural variation has revealed that a biaryl spacer between the DHA and the alkyl chain is needed for liquid crystallinity and that the one aromatic ring in the spacer cannot be substituted by a triazole. This work presents an important step towards employing the dihydroazulene-vinylheptafulvene photo/thermoswitch in photoactive liquid crystalline materials.

U2 - 10.1039/C5RA18649H

DO - 10.1039/C5RA18649H

M3 - Journal article

VL - 5

SP - 89731

EP - 89744

JO - RSC Advances

JF - RSC Advances

SN - 2046-2069

IS - 109

ER -

ID: 147126637