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Title: Preparation of a Near-Infrared Ray Absorption Film from N-Phenylthiocarbamoyl Chitosan Derivative.
Authors: Nishida, Shouko
Shibano, Masaya
Kamitakahara, Hiroshi  kyouindb  KAKEN_id  orcid (unconfirmed)
Takano, Toshiyuki  kyouindb  KAKEN_id
Author's alias: 高野, 俊幸
Keywords: chitosan
near-infrared absorption
Issue Date: 4-Dec-2015
Publisher: MDPI
Journal title: International journal of molecular sciences
Volume: 16
Issue: 12
Start page: 29093
End page: 29102
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-(decanoyl)phenythiocarbamoyl-/2-isothiocynato chitosan decanoate (3b) rather than the expected product N,N-(decanoyl)phenylthiocarbamoyl chitosan decanoate (3a). This result suggested that some of the N,N-(decanoyl)phenylthiocarmbamoyl groups had been converted to isothiocyanate groups during the decanoylation process. The subsequent reaction of compound 3b with aniline gave N,N-(decanoyl)phenylthiocarbamoyl/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.
Rights: This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
DOI(Published Version): 10.3390/ijms161226153
PubMed ID: 26690129
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