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    Title: Synthetic conducting materials VIII. Synthesis and characterization of 7,7,8, 8-tetracyanoquinodimethane salt with tetrazine derivatives
    Authors: 王文竹;Wang, Wen-jwu;Shoaw, T. Y.
    Contributors: 淡江大學化學學系
    Date: 1991-05-15
    Issue Date: 2009-12-01
    Publisher: Elsevier
    Abstract: A series of 1,2,4,5-tetrazine derivatives have been synthesized from 2-cyanopyridine and hydrazine. The charge transfer complexes of tetrazine derivatives and 7,7,8,8-tetracyanoquinodimethane (TCNQ) have been prepared and characterized by elemental analysis, infrared, electronic, electron spin resonance, mass spectra, magnetic susceptibility and electric conductivity measurements. The infrared spectra show a very strong absorption envelope in the range between 4000 to 1000 cm−1 causing from the electronic conduction band. The degree of charge transfer was estimated as 0.6 by using the cyano stretching frequency of TCNQ in complex. The electric conductivity (powder pellet) is 1.99 Scm−1 at room temperature with activation energy of 0.113 eV. The charge transfer complexes have semiconductor properties investigated by variable temperature conductivity measurements.

    Electron spin resonance spectra were recorded on these charge transfer complexes at different temperature. The observed g-values increased with decreasing temperature. The peak broadened and peak height decreased with decreasing temperature. On the basis of these results, no local unpaired ellectrons contributed from tetrazine cation were proposed.
    Relation: Synthetic metals 42(1-2), pp.1723-1728
    DOI: 10.1016/0379-6779(91)91940-C
    Appears in Collections:[化學學系暨研究所] 期刊論文

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