Physical and electrical characteristics of supramolecular polymer films based on guanosine derivatives modified with tetrathiafulvalene moiety

• Published in: Polymer journal Vol. 44; no. 9; pp. 946 - 951
• Main Authors: Choi, Seong Jib, Kuwabara, Junpei, Kanbara, Takaki
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 01.09.2012; Nature Publishing Group
• Subjects: 639/638/455/941; 639/638/455/958; 639/638/455/960; Absorption spectra; Biomaterials; Bioorganic Chemistry; Cationic; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Conductivity of specific materials; Derivatives; Dynamic tests; Electronic transport in condensed matter; Exact sciences and technology; Guanosines; Mechanical analysis; Networks; original-article; Physics; Polymer Sciences; Polymers; organic compounds (including organic semiconductors); Resistivity; Surfaces and Interfaces; Thin Films; supramolecular polymer; electrical conductivity; 2-deoxyguanosine; hydrogen bond; tetrathiafulvalene; Viscoelasticity; Differential scanning calorimetry; Electrical conductivity; Organic conductors; Guanosine; Chain length; Tetrathiafulvalene derivatives; XRD; Dynamic mechanical analysis; Glass transition; Hydrogen bonds; Supramolecular structure
• ISSN: 0032-3896; 1349-0540
• DOI: 10.1038/pj.2012.47

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. Supramolecular films consisting of guanosine derivatives modified with a tetrathiafulvalene 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. The self-supporting films were mechanically flexible. 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 composite film of the derivatives with 7,7,8,8,-tetracyanoquinodimethane exhibited electrical conductivity.