| 摘要 |
PURPOSE:To obtain an novel org. nonlinear optical material which hardly forms an inverted symmetrical form in the bulk state such as crystal state or thin film state, etc., having substantially no absorption in visible region, and exhibiting high nonlinear optical effect by constituting the material of a specified compd. CONSTITUTION:A compd. expressed by the formula I is used for constituting the title nonlinear optical material. In the formula I, D is an electron donative group; C is a univalent org. group; m is an integer 1-3; n is zero or an integer 1-3; when n is >=2, C contained in plural numbers may be same or different to each other, or may form a condensed ring by connecting with each other. The compd. can be used as a nonlinear optical material in several forms such as single crystal, powder, soln., thin film(Langmuir-Blodgett's film, vapor- deposited film, etc.) deposited on a base body, or in the form blended in a polymer or a liquid crystal molecules, etc. Thus, an org. nonlinear optical material having substantially no absorption in visible region, becoming hardly inverted symmetrical in the form when it is used, and generating high secondary high harmonics, is obtd. |
