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Photo‐Induced Orientation of a Film of Ladderlike Polysiloxane Bearing Dual Photoreactive Side Groups
Author(s) -
Gu H.W.,
Xie P.,
Shen D.Y.,
Fu P.F.,
Zhang J.M.,
Shen Z.R.,
Tang Y.X.,
Cui L.,
Kong B.,
Wei X.F.,
Wu Q.,
Bai F.L.,
Zhang R.B.
Publication year - 2003
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200305241
Subject(s) - materials science , side chain , dual (grammatical number) , raman scattering , raman spectroscopy , optoelectronics , optics , composite material , polymer , art , physics , literature
A newly designed ladder‐like polysiloxane (LPS) containing dual photoreactive side groups has been synthesized for the purpose of generating high‐quality photo‐alignment layers with controllable pretilt angle (∼ 1–7°, see Figure and cover). Integrated spectroscopic methods of UV dichroism, surface‐enhanced Raman scattering (SERS), and FT‐IR are used together for the first time to elucidate the photo‐alignment mechanism and the real cause of the high pretilt angle.