start-ver=1.4
cd-journal=joma
no-vol=10
cd-vols=
no-issue=
article-no=
start-page=4159
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2019
dt-pub=20190913
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Ultrafast isomerization-induced cooperative motions to higher molecular orientation in smectic liquid-crystalline azobenzene molecules
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The photoisomerization of molecules is widely used to control the structure of soft matter in
both natural and synthetic systems. However, the structural dynamics of the molecules
during isomerization and their subsequent response are difficult to elucidate due to their
complex and ultrafast nature. Herein, we describe the ultrafast formation of higherorientation
of liquid-crystalline (LC) azobenzene molecules via linearly polarized ultraviolet
light (UV) using ultrafast time-resolved electron diffraction. The ultrafast orientation is
caused by the trans-to-cis isomerization of the azobenzene molecules. Our observations are
consistent with simplified molecular dynamics calculations that revealed that the molecules
are aligned with the laser polarization axis by their cooperative motion after photoisomerization.
This insight advances the fundamental chemistry of photoresponsive molecules
in soft matter as well as their ultrafast photomechanical applications.
en-copyright=
kn-copyright=

en-aut-name=HadaMasaki
en-aut-sei=Hada
en-aut-mei=Masaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=YamaguchiDaisuke
en-aut-sei=Yamaguchi
en-aut-mei=Daisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=IshikawaTadahiko
en-aut-sei=Ishikawa
en-aut-mei=Tadahiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=SawaTakayoshi
en-aut-sei=Sawa
en-aut-mei=Takayoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=TsurutaKenji
en-aut-sei=Tsuruta
en-aut-mei=Kenji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

en-aut-name=IshikawaKen
en-aut-sei=Ishikawa
en-aut-mei=Ken
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

en-aut-name=KoshiharaShin-Ya
en-aut-sei=Koshihara
en-aut-mei=Shin-Ya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=

en-aut-name=HayashiYasuhiko
en-aut-sei=Hayashi
en-aut-mei=Yasuhiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=

en-aut-name=KatoTakashi
en-aut-sei=Kato
en-aut-mei=Takashi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=

affil-num=1
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=Department of Chemistry & Biotechnology, School of Engineering, The University of Tokyo
kn-affil=

affil-num=3
en-affil=School of Science,Tokyo Institute of Technology
kn-affil=

affil-num=4
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=5
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=6
en-affil=School of Materials and Chemical Technology, Tokyo Institute of Technology
kn-affil=

affil-num=7
en-affil=School of Science,Tokyo Institute of Technology
kn-affil=

affil-num=8
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=9
en-affil=Department of Chemistry & Biotechnology, School of Engineering, The University of Tokyo
kn-affil=
END