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Materials 2016, 9(10), 837; doi:10.3390/ma9100837

Surface Structures Formed by a Copper(II) Complex of Alkyl-Derivatized Indigo

1
Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
2
Hitachi, Ltd., Power Generation Plant & Grid Control Systems Engineering Department, Control System Platform Division, 5-2-1 Omika-cho, Hitachi-shi, Ibaraki 319-1293, Japan
3
School of Dentistry, Faculty of Dentistry, Meikai University, 1-1 Keyakidai, Sakado-shi, Saitama 350-0283, Japan
*
Authors to whom correspondence should be addressed.
Academic Editor: Callum McHugh
Received: 15 July 2016 / Revised: 29 September 2016 / Accepted: 10 October 2016 / Published: 15 October 2016
(This article belongs to the Special Issue Functional Organic Dyes and Pigments)
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Abstract

Assembled structures of dyes have great influence on their coloring function. For example, metal ions added in the dyeing process are known to prevent fading of color. Thus, we have investigated the influence of an addition of copper(II) ion on the surface structure of alkyl-derivatized indigo. Scanning tunneling microscope (STM) analysis revealed that the copper(II) complexes of indigo formed orderly lamellar structures on a HOPG substrate. These lamellar structures of the complexes are found to be more stable than those of alkyl-derivatized indigos alone. Furthermore, 2D chirality was observed. View Full-Text
Keywords: dye; scanning tunneling microscope; alkyl chain; indigo; copper; mordanting dye; scanning tunneling microscope; alkyl chain; indigo; copper; mordanting
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Honda, A.; Noda, K.; Tamaki, Y.; Miyamura, K. Surface Structures Formed by a Copper(II) Complex of Alkyl-Derivatized Indigo. Materials 2016, 9, 837.

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