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Crystal structure of an azo-Cr complex used as a charge-control agent and its electrical properties

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The title compound is an azo-Cr complex (S-34Na) used as a charge-control agent in electrophotography. A high thermal stability of S-34Na has been investigated from the standpoint of the crystal structure. X-ray analysis revealed that S-34Na is a dinuclear complex of octahedral CrIII and NaI units and forms a one-dimensional polymer running along the c axis, contributing to a significant thermal stability of S-34Na. On the other hand, the electrical conductivity of S-34Na at about 100 °C is found to be higher than that of room temperature by three orders of magnitude. This supports our charge-control mechanism that assumes an appreciable temperature increase at the “toner/carrier” interface due to tribo-electrification.

Document Type: Research Article

Publication date: January 1, 2008

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  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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