| 摘要 |
PURPOSE:To obtain the subject material comprising a monocrystal which is stable at a room temp. and does not have center of symmetry and having large SHG activity by forming an org. crystal which has the large SHG activity, from a specified stilbene derivative shown by the formula. CONSTITUTION:The stilbene derivative shown by formula I is incorporated in the subject material comprising the monocrystal which does not have the center of symmetry, and having large effective nonlinear optical constant and the large SHG activity. In the formula, X is a halogen atom such as chlorine, bromine, fluorine and iodine atoms, etc. The stilbene derivative has good crystallinity and is easily obtained the monocrystal of the derivative from an org. solvent of the derivative by a slow evaporation method, etc. The monocrystal of the derivative is stable at the room temp. The stilbene derivative enables to degenerate the symmetry of the crystal by introducing the halogen atom to one of phenyl groups at 4-position thereof as a nucleus substituting group. |
