Influence of the position of the connecting spacer of the chromophore on the nonlinear optical response

A new chromophore, C1, based on a similar D pi A-structure as in the FTC-chromophore but with a hydroxyalkyl spacer perpendicular to the direction of the dipole moment was synthesized. Both chromophores and the CLD-chromophore were used to prepare high T-g nonlinear optical vinyl polymers. The influence of the position of the spacer on the D pi A-system on the NLO response of the resulting polymers was investigated.