| abstract |
NEW MATERIAL:A compound expressed by formula I (R 1 is NO 2 or NH 2 and R 2 WR 5 are H; R 2 is NO 2 or NH 2 and R 1 , R 3 WR 5 are H or R 1 is NR 2 , R 2 and R 3 are H and R 4 is NO 2 ). n EXAMPLE: 1-(2-Nitrophenyl)butadiyne. n USE: A nonlinear optical material, photosensitive material or high polymer semiconductor crystals, having great molecular polarization due to nitro group which is an electron attractive group or amino group which is an electron donative group, resulting in expectable great nonlinear optical effects. n PREPARATION: A phenylicetylene derivative expressed by formula II and a 4-bromo-2-methyl-3-butyn-2-ol expressed by formula III are subjected to asymmetric coupling reaction to provide a phenyldiacetylene derivative expressed by formula IV, which is then subjected to acetone removing reaction in the presence of potassium hydroxide catalyst to afford the aimed compound expressed by formula I. n COPYRIGHT: (C)1989,JPO&Japio |