| 摘要 |
The present invention relates to nonlinear optical (NLO) materials, compositions thereof and NLO devices using polymeric matrices supporting a second order NLO material defined by the formula (I):ED-B-EW where ED is an electron donating moiety, B is a bridging moiety, and EW is the electron withdrawing moiety (terminal acceptor group) defined by formula (II), where C1 is a carbon atom linked through a double bond to a cyclic or an acylic carbon atom in the bridging moiety, and A1, A2, A3 or A4 are the same or different from one another, each of which is an electron withdrawing group such as CN, COR, COOR, COOH or CH=C(R)2 where R is a C1-6 alkyl.
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