Stock solution for production of nonlinear-optical materials, nonlinear-optical material, and nonlinear-optical device

A nonlinear-optical material prepared using a wet coating method, wherein a stock solution for production of nonlinear-optical materials comprising a nonlinear-optically active organic compound is used, the stock solution satisfying the following condition (i) or (ii):

• (i) the nonlinear-optically active organic compound further comprises at least one cross-linkable functional group comprising a hydrolysable silyl group;
• and the nonlinear-optically active organic compound is a push-pull π-conjugated compound represented by Formula (1), or
• (ii) the stock solution further comprises a matrix-forming compound having at least one cross-linkable functional group comprising a hydrolysable silyl group;
• and
• the nonlinear-optically active organic compound is represented by Formula (2):
• wherein in Formula (1), Z1 to Z3 each are independently an aromatic group which may have substituents;
• L is a π-conjugated group which may have substituents;
• A is an electron-withdrawing group which may have substituents;
• m is 0 or 1;
• Z1 to Z3, L and A each may be linked with any other group to form a ring structure;
• and at least one group thereof has one or more cross-linkable functional groups:
• wherein in Formula (2), Z4 to Z6 each are independently an aromatic group which may have substituents;
• D is a π-conjugated group which may have substituents;
• E is an electron-withdrawing group which may have substituents;
• n is 0 or 1;
• and Z4 to Z6, D, and E each may be linked with any other group to form a ring structure and may have one or more cross-linkable functional groups.

A nonlinear-optical device prepared using a wet coating method wherein a stock solution for production of nonlinear-optical materials comprising a nonlinear-optically active organic compound is used, the stock solution satisfying the following condition (i) or (ii):

• (i) the nonlinear-optically active organic compound further comprises at least one cross-linkable functional group comprising a hydrolysable silyl group;
• and the nonlinear-optically active organic compound is a push-pull π-conjugated compound represented by Formula (1), or
• (ii) the stock solution further comprises a matrix-forming compound having at least one cross-linkable functional group comprising a hydrolysable silyl group;
• and
• the nonlinear-optically active organic compound is represented by Formula (2):
• wherein in Formula (1), Z1 to Z3 each are independently an aromatic group which may have substituents;
• L is a π-conjugated group which may have substituents;
• and A is an electron-withdrawing group which may have substituents;
• m is 0 or 1;
• wherein Z1 to Z3, L and A each may be linked with any other group to form a ring structure;
• and at least one group thereof has one or more cross-linkable functional groups:
• wherein in Formula (2), Z4 to Z6 each are independently an aromatic group which may have substituents;
• D is a π-conjugated group which may have substituents;
• E is an electron-withdrawing group which may have substituents;
• n is 0 or 1;
• and Z4 to Z6, D, and E each may be linked with any other group to form a ring structure and may have one or more cross-linkable functional groups.