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Volume: 46 | Article ID: art00004
Development of Azo Pigments for High Performance Organic Photoconductors (OPC)
  DOI :  10.2352/J.ImagingSci.Technol.2002.46.4.art00004  Published OnlineJuly 2002

We developed a novel coupler, hydroxyperinone, 2- and/or 5-hydroxy-7H-benz[de]benzimidazo[2,1-a]isoquinoline-7-one and synthesized a bisazo pigment from the novel coupler. The OPC using this bisaszo pigments showed better characteristics in sensitivity and cyclic stability than the OPC using bisazo pigments derived from Naphthol AS. 13C NMR spectra of these bisazo pigments indicated that the dominant tautomer of the new bisazo pigment in the solid state was different from those of other bisazo pigments. The difference in tautomers reflects their characteristics. We designed and synthesized a unique highly sensitive unsymmetrical bisazo pigment having a large dipole moment in the excited state, on the basis of the photocarrier generation process model. Thermally stimulated current measurements were applied to elucidate factors for high sensitivity.

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Tetsuo Murayama, "Development of Azo Pigments for High Performance Organic Photoconductors (OPC)in Journal of Imaging Science and Technology,  2002,  pp 285 - 291,

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