Abstract
Supramolecular films consisting of guanosine derivatives modified with a tetrathiafulvalene (TTF) moiety have been prepared. The hydrogen bonding network of the guanosine unit enables the formation of a robust and self-supporting cast film by a solution process. Differential scanning calorimetry and dynamic mechanical analysis (DMA) revealed that the self-supporting films were mechanically flexible and their glass transition temperature was lower than room temperature. The results of the DMA also showed the viscoelastic properties of the films at room temperature. The physical properties of the films of the derivatives depended on both the length of the alkyl chains and the structure of their terminal group. The chemical oxidation of the derivatives resulted in the formation of the absorption band due to the radical cationic TTF moiety. The composite film of the derivatives with 7,7,8,8,-tetracyanoquinodimethane exhibited electrical conductivity.
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Acknowledgements
This work was partly supported by Grants-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan. The Circle for the promotion of science and Engineering is acknowledged for the financial support. The authors are grateful to the Chemical Analysis Center of University of Tsukuba for elemental analyses and NMR spectroscopy. The authors are grateful thank to Mr T Aikawa and Mr J Kanai in TA Instruments for the measurements of DMA. Professor Y Otsuka and Mr Y Shoji are acknowledged for technical supports of the measurements of electrical conductivity.
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Choi, S., Kuwabara, J. & Kanbara, T. Physical and electrical characteristics of supramolecular polymer films based on guanosine derivatives modified with tetrathiafulvalene moiety. Polym J 44, 946–951 (2012). https://doi.org/10.1038/pj.2012.47
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DOI: https://doi.org/10.1038/pj.2012.47
