Bisbenzopyran and bisbenzopyrylium adducts

Abstract

Abstract A sensitizer for use in electrophotography comprising a bisbenzopyran or bisbenzopyrylium adduct of a member selected from the group consisting of bisbenzopyrylium salts represented by the general formula I: wherein R1 represents hydrogen, iso- or normal-alkyl radical having 1 to 10 carbon atoms or the phenyl radical; R2 represents phenyl, naphthyl styryl or any of these radicals having 1 to 3 substituents selected from methyl radical, alkoxy containing 1 to 4 carbon atoms such as methoxy, ethoxy and butoxy; and X represents an anionic functional radical; and benzopyrylium salts represented by the general formula II: wherein R3 represents methyl, phenyl or wherein R6 represents hydrogen or a lower alkyl radical having 1 to 3 carbon atoms; R7 represents phenyl, naphthyl or either of these radicals having 1 to 3 substituents selected from methyl, methoxy, nitro, nitrile, halogen, carboxyl, amino and hydroxy; R4 represents hydrogen, methyl or phenyl; R5 represents hydrogen, lower alkyl containing 1 to 2 carbon atoms, alkoxy containing 1 to 2 carbon atoms, halogen, nitro or nitrile; and Y represents an anionic functional radical; AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF BISBENZOPYRAN DERIVATIVES HAVING THE FOLLOWING GENERAL FORMULA I'': wherein R1 and R2 are identical with R1 and R2 in the general formula I respectively: AND BENZOPYRAN DERIVATIVES HAVING THE FOLLOWING GENERAL FORMULA II'': wherein R3, R4 and R5 are identical with R3, R4 and R5 in the general formula II respectively.

Inventors

• 👤 Tomio Kubota
• 👤 Katsue Kojima
• 👤 Masafumi Ohta

Bibliographic Details