| 摘要 |
NEW MATERIAL:A compound shown by the formula I (M is H, alkali metal or alkaline earth metal; X is lower alkoxy; Y is H or lower alkyl; Z is alkyl or aralkyl). USE:A far infrared ray absorber. Capable of forming a thin film having a uniform composition in good reproducibility, useful as a dyestuff for an optical recording having high stability to light and heat. Since the compound has absorption wavelength reaching a visible light range and light screening action on wavelength from visible light range to far infrared ray range and is useful as a remote control device for TV, etc., speed and distance measurement of camera, etc., an optical filter for preventing malfunction caused by visible light rays having vigrous change in light volume of receptor element in game machine, etc. PREPARATION:A compound shown by the formula II is tetrazotized, reacted with m-phenylenediamine to give a compound shown by the formula III, which is alkylated with an alkyl halide or aralkyl halide to give a compound shown by the formula I. |
