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An alternative synthetic route to soluble polyetherimide derivatives with high second‐order optical nonlinearity
Author(s) -
Lee KwangSup,
Moon KiJeong,
Woo Han Young,
Shim HongKu
Publication year - 1997
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.19970091211
Subject(s) - materials science , polyimide , polyetherimide , chromophore , mitsunobu reaction , thermal stability , polymer , azobenzene , diimide , diol , nonlinear optical , thermal , thermosetting polymer , nonlinear system , polymer chemistry , chemical engineering , optoelectronics , photochemistry , nanotechnology , organic chemistry , composite material , molecule , thermodynamics , layer (electronics) , chemistry , perylene , physics , quantum mechanics , engineering
Processible polytherimide‐based polymers that display nonlinear optical (NLO) activity are reported to have been synthesized by the Mitsunobu reaction, in which the polyimide structure is synthesized directly in a single step from a diimide and a diol, without a high‐temperature thermal imidization step. The resulting polymers, with pendant‐incorporated tricyanovinyl azobenzene chromophores, showed very large second‐order NLO activity with good temporal and thermal stability—in one case no decay of the signal was observed up to 125°C.