申请人:HOECHST AKTIENGESELLSCHAFT
公开号:EP0644453A1
公开(公告)日:1995-03-22
Organic nonlinear optical materials that have light absorption in the crystal at wavelengths shorter than 390 nm, that have good crystallinity and processability, that have a non-centrosymmetry molecular arrangement and that hence are suitable for use in wavelength conversion devices comprises compounds having the formula I:
where
R¹, R² and R³ which may be the same or different represent a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group;
R⁴ is a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group or an electron withdrawing group;
R⁵ which may be the same or different represent a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group or an electron donating group;
m is an integer of 1 to 4;
when m is 2 or more, two or more R⁵s may bind together to form a ring;
provided that R³ is not a methyl group when R¹, R², R⁴ and R⁵ are all hydrogen atoms.
有机非线性光学材料在波长短于 390 纳米的晶体中具有光吸收特性,具有良好的结晶性和加工性,具有非中心对称的分子排列,因此适用于波长转换装置,包括具有式 I 的化合物:
式中
可以相同或不同的 R¹、R² 和 R³ 代表氢原子、烷基、芳基或杂环基团;
R⁴ 是氢原子、烷基、芳基、杂环基团或退电子基团;
可以相同或不同的 R⁵ 代表氢原子、烷基、芳基、杂环基团或电子捐赠基团;
m 是 1 至 4 的整数;
当 m 为 2 或 2 以上时,两个或两个以上的 R⁵ 可结合在一起形成一个环;
当 R¹、R²、R⁴ 和 R⁵ 都是氢原子时,R³ 不是甲基。