電気光学ポリマーは超高速光変調器や光スイッチ、高速デジタルシグナル伝送、電界センサー、テラヘルツ発生・検出など様々な応用が期待されている。本稿ではドナー部位に2つのアルキルオキシ基を持ったアミノベンゼン、π共役系部位にチエニルジビニレン、アクセプター部位にトリシアノフラン誘導体を持った、新規電気光学色素の超分極率の評価を行った。アルキルオキシ基を2つ持つ電気光学色素はアルキルオキシ基を持たないあるいはアルキルオキシ基を1つ持つ電気光学色素比べて、線形及び非線型光学特性に改善が見られた。その改善の要因として分子内の2つの弱い水素結合の可能性について議論を行う。

　Recently, considerable attention has been paid to the development of polymeric electro-optic (EO) materials due to their potential applications in ultra-high-speed optical modulators and switches, high-speed digital signal processing, electric field sensing, and terahertz generation/detection. One important subject in preparing EO polymer is the development of EO chromophores with large molecular first hyperpolarizability and excellent thermal and chemical stability. In this paper, we evaluated molecular first hyperpolarizability of new EO chromophores that have amino-benzene with two alkyloxy groups as the donor unit, thienyl-di-vinylene bridges as the π-electron bridge, and tricyanofuran derivatives as the acceptor unit. We found an improvement in linear and nonlinear optical properties for the EO chromophores having an amino-benzene donor with two alkyloxy groups, compared with the benchmark EO chromophores without alkyloxy group and the EO chromophores with one alkyloxy group. We discuss a possible mechanism with a contribution for the improvement − two intra-molecular week hydrogen bondings.