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Volume: 20 | Article ID: art00022_1
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Crystal Structure of Solvated Zinc Complexes Based on Salicylic Acid Derivatives
Takashi Makino
Jin Mizuguchi
  DOI :  10.2352/ISSN.2169-4451.2004.20.1.art00022_1  Published Online :  January 2004
Abstract

A zinc complex based on salicylic acid derivatives (E-84 from Orient Chem.) is a powerful charge-control agent for toners used in electrophotography. However, its chargecontrol ability is known to greatly depend on the process of toner preparations. It is therefore probable that the structure of E-84 can be modified during the process, or the molecules might rearrange themselves in a different way, leading to different characteristics. For this reason, structure analysis of E-84 has been carried out on single crystals recrystallized from solution in dimethylacetoamide (DMA), or dimethylsufoxide (DMSO) in the presence or absence of water. As a result, a variety of complexes have been isolated. 3,5-di-tert-butyl-salicylic acid (TBS) is found to coordinate to the Zn atom as a monodentate ligand in all complexes: four-coordinate E-84/(DMSO)2, five-coordinate E-84/(H2O)3 and. four-coordinate E-84/(H2O)2. The present results lead us to conclude that various Zn complexes form easily in the process of toner preparations, depending on solvents, polymers etc. This may result in scattered characteristics of the charge-control ability.

Journal Title : NIP & Digital Fabrication Conference
Publisher Name : Society of Imaging Science and Technology
Publisher Location : 7003 Kilworth Lane, Springfield, VA 22151, USA
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 DOI 10.2352/ISSN.2169-4451.2004.20.1.art00022_1
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Takashi Makino, Jin Mizuguchi, "Crystal Structure of Solvated Zinc Complexes Based on Salicylic Acid Derivatives"  in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP20),  2004,  pp 94 - 97,  https://doi.org/10.2352/ISSN.2169-4451.2004.20.1.art00022_1

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Articles
Crystal Structure of Solvated Zinc Complexes Based on Salicylic Acid Derivatives
MakinoTakashi
MizuguchiJin
01012004
2004
1
94
97
2004
A zinc complex based on salicylic acid derivatives (E-84 from Orient Chem.) is a powerful charge-control agent for toners used in electrophotography. However, its chargecontrol ability is known to greatly depend on the process of toner preparations. It is therefore probable that the structure of E-84 can be modified during the process, or the molecules might rearrange themselves in a different way, leading to different characteristics. For this reason, structure analysis of E-84 has been carried out on single crystals recrystallized from solution in dimethylacetoamide (DMA), or dimethylsufoxide (DMSO) in the presence or absence of water. As a result, a variety of complexes have been isolated. 3,5-di-tert-butyl-salicylic acid (TBS) is found to coordinate to the Zn atom as a monodentate ligand in all complexes: four-coordinate E-84/(DMSO)2, five-coordinate E-84/(H2O)3 and. four-coordinate E-84/(H2O)2. The present results lead us to conclude that various Zn complexes form easily in the process of toner preparations, depending on solvents, polymers etc. This may result in scattered characteristics of the charge-control ability.