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|Title: ||Synthetic conductive materials V. Synthesis and characterization of charge transfer complex of 3, 6-bis(2'-pyridyl)-4, 5-dihydro-1, 2, 4, 5-tetrazine and 7, 7, 8, 8-tetracyanoquinodimethane|
|Authors: ||王文竹;Wang, Wen-jwu;Chen, C. C.|
|Issue Date: ||2009-12-01|
|Abstract: ||3,6-Bis(2′-pyridyl)-4,5-dihydro-1,2,4,5-tetrazine (PTAH2) has been synthesized by 2-cyanopyridine and hydazine. The acetonitrile solution of PTAH2 and 7,7,8,8-tetracyanoqinodimethane was mixed with 1:1mole ratio and stand for 2 weeks. The black needle crystal has been characterized by elemental analysis, IR, NMR, ESR, MS, UV/VIS/NIR, DSC, CV, magnetic susceptibility and electric conductivity. This charge-transfer complex has (PTAH2) (TCNQ) composition with segregated stacking. The segregated stacking was evidenced by IR spectra which show very strong absorption before 1000 cm−1 then drop to normal pattern. Many sharp indentations in a very broad electronicabsorption envelope which had a steep edge at 1000 cm−1 caused byvibrations whose absorption falls inside the conduction band were observed in 4000-1000 cm−1 range. All other physical properties characterized by above physical methods will be discussed. The electric conductivity (powder form) is 4.8 × 10−1Scm−1 at 20°C with activation energy of 0.08 eV. This very low activation energy may be caused by contact resistance between powder particles. The intropsic properties of electric conduction may be metallic type.|
|Relation: ||Synthetic metals 27(3-4), pp.219-224|
|Appears in Collections:||[化學學系暨研究所] 期刊論文|
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