Synthesis and Structure of NLO - active 8,8 - Dicyano - 3 - (4' - N, N - dimethylamino) phenylheptafulvene
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Some new 8,8-dicyanophenylheptafulvene derivatives have been synthesized, among which the title compound <B>1a</B> is found to crystallize in the polar space group of <I>P</I>1 showing non-linear optical characteristics. Compound <B>1a</B> is composed of a strong acceptor of the dicyanomethylene group and a strong donor of the dimethylamino group, both of which are combined with the π-conjugated phenylheptafulvene skeleton.
- Chemistry Letters
Chemistry Letters 1999(5), 389-390, 1999-05-05
The Chemical Society of Japan