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Multi-active electrophotographic element and imaging process using free radicals as charge transport material

  • US 5,324,604 A
  • Filed: 06/17/1991
  • Issued: 06/28/1994
  • Est. Priority Date: 06/17/1991
  • Status: Expired due to Fees
First Claim
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1. A multi-active electrophotographic element comprising:

  • a charge-generation layer;

    a charge-transport layer contiguous with said charge-generation layer, wherein said charge-transport layer comprises;

    a stable free radical compound defined by the formula;

    ##STR3## wherein;

    °

    C. is a carbon atom with an unpaired electron andR1, R2, and R3 are the same or different and each represent a hydrogen, alkyl, aryl, aralkyl, arylene, alkylene, heterocyclic arylene, imino or halogen group;

    or a substituted alkyl, aryl, aralkyl, arylene, alkylene, heterocyclic arylene or imino group;

    or an alkyl, aryl, aralkyl, arylene, alkylene or heterocyclic arylene group linking two or more °

    C. atoms;

    or are themselves linked; and

    a conductive support in electrical contact with either said charge-generation layer or said charge-transport layer.

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