Di-hydrazone based charge transport compounds

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Reexamination Certificate

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C430S078000, C430S079000, C430S058350, C399S159000, C546S095000, C546S096000, C548S444000, C564S251000

Reexamination Certificate

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06864028

ABSTRACT:
Improved organophotoreceptors have:(a) a charge transport compound having the formulawhere R1and R2are, independently, an (N,N-disubstituted) arylamine group, such as a julolidine group, a triphenyl amine group, or an N-substituted carbazole group;R3and R4are, independently, an alkylsulfonylphenyl group; andX is a linking group having the formula —(CH2)m—, branched or linear, where m is an integer between 0 and 20, inclusive, and one or more of the methylene groups is optionally replaced by an oxygen atom, a carbonyl group, urethane, urea, an ester group, a —NR5group, a CHR6group, or a CR7R8group where R5, R6, R7, and R8are, independently, H, an alkyl group, or aryl group;(b) a charge generating compound; and(c) an electrically conductive substrate over which the charge transport compound and the charge generating compound are located.

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