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Novel diacetylene‐containing polymers for second order NLO applications: effect of main chains and structure property relationships
Author(s) -
Hernández Susana,
Miura Hirohiko,
Beristain Miriam F.,
Ogawa Takeshi,
Watanabe Toshiyuki,
Miyata Seizo
Publication year - 2003
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200390021
Subject(s) - polymer , chromophore , diacetylene , side chain , materials science , glass transition , polymer chemistry , azo compound , molecule , chemistry , organic chemistry , monomer , composite material
In order to obtain polymers having high second order nonlinear optical (NLO) response, various novel polymers that contain polar dye molecules in side chains and diacetylenic groups in the main chains were synthesized, and their second order NLO properties were studied. Some of these polymers consisting of para ‐benzoate and para ‐cinnamate main chains, showed extremely high NLO coefficients, d 33 of 200 ‐ 350 pm/V, and the corresponding meta polymers showed much inferior NLO coefficients. The polymers having aliphatic main chains had very little NLO response probably because of their low glass transition temperatures and flexibility of main chains. The high SHG responses of these polymers are attributed to their facile orientation of both chromophores and main chains. In the case of para ‐polymers, the main chain orientation of alkoxybenzoate and cinnamate along the chromophore is thought to be a reason for their high NLO coefficients.