Preparation of a Near-Infrared Ray Absorption Film from N-Phenylthiocarbamoyl Chitosan DerivativeReport as inadecuate




Preparation of a Near-Infrared Ray Absorption Film from N-Phenylthiocarbamoyl Chitosan Derivative - Download this document for free, or read online. Document in PDF available to download.

Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan





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Academic Editors: Hitoshi Sashiwa and Shinsuke Ifuku

Abstract We recently observed that the decanoylation of N-phenylthiocarbamoyl chitosan 2 with a mixture of decanoic anhydride and pyridine at 60 °C for 24 h afforded N,N-decanoylphenythiocarbamoyl-2-isothiocynato chitosan decanoate 3b rather than the expected product N,N-decanoylphenylthiocarbamoyl chitosan decanoate 3a. This result suggested that some of the N,N-decanoylphenylthiocarmbamoyl groups had been converted to isothiocyanate groups during the decanoylation process. The subsequent reaction of compound 3b with aniline gave N,N-decanoylphenylthiocarbamoyl-N-phenylthiocarbamoyl chitosan decanoate 4 in high yield. A solution of compound 4 in CHCl3 was then added to a solution of copper decanoate 5 in the same solvent, and the resulting mixture was cast onto a glass plate to give a cast film. The film was annealed at 200 °C in an oven to give a greenish film, which showed good near-infrared absorption characteristic in the range of 800–2200 nm. View Full-Text

Keywords: chitosan; copper; decanoylation; near-infrared absorption; phenythiocarbamoyl chitosan; copper; decanoylation; near-infrared absorption; phenythiocarbamoyl





Author: Shouko Nishida, Masaya Shibano, Hiroshi Kamitakahara and Toshiyuki Takano *

Source: http://mdpi.com/



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