| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain the subject new derivative comprising a specific fluorenone derivative having oxadiazole ring and bisazo group, having high sensitivity and good color-sensitive property, excellent in stability and durability and capable of withstanding repeated use and useful for electrophotographic photoreceptors, etc. SOLUTION: This new fluorenone derivative is represented by formula I (K<1> and K<2> are each a coupling residue containing hydroxyl group having a coupling ability) and has high sensitivity, good color-sensitive property and slight fatigue by light. Therefore, the fluorenone derivative hardly causes variation of sensitivity, antistatic property and residual electric potential when repeatedly used and has high stability and excellent durability and is useful for electrophotographic copying machines as well as photoreceptors for printers such as laser printer, liquid crystal and shutter printer. The compound is obtained by reacting 2-amino-9-fluorenone-7-carboxylic acid of formula II with hydrazium sulfate to afford a diamine of formula III, subjecting the diamine to tetrazotization according to ordinary method and coupling the resultant azo compound to the corresponding coupler.</p> |
