Electronic Properties of Benzidine·TCNQ System

The benzidine·tetracyano-p-quinodimethane (TCNQ) system forms two types of charge-transfer complexes; one (I) containes some sort of solvent molecules, while the other (II) does not. The electronic properties of I have been found to be unusual in many respects compared to II which shows the properties expected from those of ordinary charge-transfer complexes. I and II did not exhibit ESR absorption, if they were well-grown crystals. However, when they were pulverized to fine powder, I showed a strong absorption while II did not. The visible range absorption spectra of I and II consisted of three main bands, but all the bands of I were found to be shifted to longer wavelengths compared to those of II. In addition to these bands, two shoulders were found in the spectrum of I. The shoulders were considered to be due to the ion radicals produced from benzidine and TCNQ. The electrical resistivities are again quite different from one another. The resistivity of I was found to be 103–105 ohm cm at room temperat...

[1]  M. Kinoshita,et al.  Inclusion Compounds of Some Charge-Transfer Complexes , 1971 .

[2]  C. Pecile,et al.  Polarized Infrared Spectra of TCNQ and TCNQ‐d4 Single Crystals , 1970 .

[3]  M. Kinoshita,et al.  Mechanochemical Spin Generation in a Solid Charge Transfer Complex , 1969 .

[4]  H. Kuroda,et al.  The Charge-transfer Bands in the Crystal Spectra of Molecular Compounds of Tetramethylbenzidine and Those of Benzidine , 1969 .

[5]  M. Kinoshita,et al.  Electronic Properties of Some Complexes of Tetracyanoquinodimethan with Aromatic Diamines , 1968 .

[6]  S. Nakayama,et al.  The Temperature Dependence of Absorption Spectra of Cation Radicals of Benzidine and N,N,N′,N′-Tetramethyl-benzidine and Their Dimerization in Solution , 1968 .

[7]  Y. Matsunaga.  Organic Molecular Complexes Exhibiting Low Electrical Resistivities: Syntheses and Some Physical Properties , 1968 .

[8]  Y. Matsunaga.  Polymorphic Forms of the Diaminopyrene-p-chloranil and Related Molecular Complexes , 1966, Nature.

[9]  Y. Matsunaga.  Electrical Resistivities and the Type of Bonding in Some Quinone Complexes , 1965, Nature.

[10]  J. H. Osiecki,et al.  Relation between the Chemical Composition and the Electronic Properties of the Charge‐Transfer Complex, p‐Chloranil: p‐Phenylenediamine , 1963 .

[11]  W. R. Hertler,et al.  Substituted Quinodimethans. I. Preparation and Chemistry of 7,7,8,8-Tetracyanoquinodimethan , 1962 .

[12]  W. Mahler,et al.  Substituted Quinodimethans. II. Anion-radical Derivatives and Complexes of 7,7,8,8-Tetracyanoquinodimethan , 1962 .

[13]  R. Sehr,et al.  Organic Semiconductors. II. The Electrical Resistivity of Organic Molecular Complexes , 1960 .

[14]  J. Evans.  The vibrational assignments and configuration of aniline, aniline-NHD and aniline-ND2 , 1960 .