Derivatives of diiminoquinones useful as electron transport agents in electrophotographic elements
AssigneeHewlett-Packard Company
InventorsKhe C. Nguyen, Sivapackia Ganapathiappan
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Abstract
Derivatives of diiminoquinones are useful as electron transport agents in electrophotography. The diiminoquinone derivatives are inexpensive materials, requiring only two steps to synthesize, have excellent solubility and compatibility with most binders due to the presence of long alkyl chains, and evidence high electron mobility.
Claims21
An electrophotographic element for use in electrophotographic printing, said electrophotographic element including a charge generation region and a charge transport region and formed on an electrically conducting substrate, said charge transport region including at least one electron transport agent having the structure ##STR13## where A is a moiety selected from the group consisting of.dbd.CH--CH.dbd., ##STR14## B.sub.1 and B.sub.2 are independently selected from the group consisting of O, S, Se, Te, dicyano, and alkoxy, and R.sub.1 to R.sub.23 are independently selected from the group consisting of hydrogen, alkyl, alkoxy, alkene, aryl, hydroxy, halogen, cyano, nitro, and sulfuryl, n is an integer within the range of 0 to 3, and ##STR15## are independently selected from the group consisting of ##STR16##
An electrophotographic element for use in electrophotographic printing, said electrophotographic element including a charge generation region and a charge transport region and formed on an electrically conducting substrate, said charge transport region including at least one electron transport agent having the structure ##STR23##
An electrophotographic element for use in electrophotographic printing, said electrophotographic element including a charge generation region and a charge transport region and formed on an electrically conducting substrate, said charge transport region including at least one electron transport agent having the structure ##STR24##
A method for fabricating an electrophotographic element which includes a charge generation region and a charge transport region, said electrophotographic element formed on an electrically conducting substrate, said method comprising forming said electrophotographic element containing at least one electron transport agent having the structure ##STR25## where A is a moiety selected from the group consisting of .dbd.CH--CH.dbd., ##STR26## B.sub.1 and B.sub.2 are independently selected from the group consisting of O, S, Se, Te, dicyano, and alkoxy, and R.sub.1 to R.sub.23 are independently selected from the group consisting of hydrogen, alkyl, alkoxy, alkene, aryl, hydroxy, halogen, cyano, nitro, and sulfuryl, n is an integer within the range of 0 to 3, and ##STR27## are independently selected from the group consisting of ##STR28##
Dependencies are inferred from the claim text.