scholarly journals The Electrical Conductivities of Aromatic Diamine-Chloranil and -Tetracyanoethylene Charge-Transfer Complexes

1965 ◽  
Vol 38 (12) ◽  
pp. 2201-2202 ◽  
Author(s):  
Hideaki Kusakawa ◽  
Shun-ichiro Nishizaki
Keyword(s):  
Charge Transfer ◽  
Aromatic Diamine ◽  
Charge Transfer Complexes ◽  
Electrical Conductivities

Thermochemical hole burning performance of TCNQ-based charge transfer complexes with different electrical conductivities

2008 ◽  
Vol 19 (23) ◽  
pp. 235303 ◽  
Author(s):  
Wei Zhou ◽  
Feng Lin ◽  
Liang Ren ◽  
Xiaomin Huang ◽  
Chunbo Ran ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Hole Burning ◽  
Charge Transfer Complexes ◽  
Electrical Conductivities ◽  
Thermochemical Hole Burning

scholarly journals Crystal Structures and Electrical Conductivities of TXCn-TTF (X=Sulfur, Selenium, Tellurium;n=2,3)·TCNQ Charge-Transfer Complexes

1991 ◽  
Vol 64 (7) ◽  
pp. 2159-2168 ◽  
Author(s):  
Kenichi Imaeda ◽  
Takehiko Mori ◽  
Chikako Nakano ◽  
Hiroo Inokuchi ◽  
Naoko Iwasawa ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Crystal Structures ◽  
Charge Transfer Complexes ◽  
Electrical Conductivities

scholarly journals Semiconduction in charge-transfer complexes

1969 ◽  
Vol 47 (20) ◽  
pp. 3899-3902 ◽  
Author(s):  
S. N. Bhat ◽  
C. N. R. Rao
Keyword(s):  
Charge Transfer ◽  
Charge Carriers ◽  
Charge Transfer Complexes ◽  
Chloride Complexes ◽  
Seebeck Coefficients ◽  
Spin Resonance ◽  
Electrical Conductivities ◽  
Donor Acceptor ◽  
Ambient Gases ◽  
Antimony Chloride

Electrical conductivities, electron spin resonance spectra, electronic spectra, and Seebeck coefficients of solid charge-transfer complexes of benzidine–iodine, p-phenylenediamine–iodine, and phenothiazine–iodine as well as two antimony chloride complexes of phenothiazine have been studied. The phenothiazine–I2 system shows change in sign of the majority charge carriers with the donor–acceptor ratio. The effect of ambient gases on the conductivities of a few donors, acceptors, and their complexes in the solid state have been examined. Seebeck coefficient measurements show that the conduction in TCNQ salts takes place by a hopping mechanism.

scholarly journals Synthesis of racemic and chiral BEDT-TTF derivatives possessing hydroxy groups and their achiral and chiral charge transfer complexes

2015 ◽  
Vol 11 ◽  
pp. 1561-1569 ◽  
Author(s):  
Sara Jane Krivickas ◽  
Chiho Hashimoto ◽  
Junya Yoshida ◽  
Akira Ueda ◽  
Kazuyuki Takahashi ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Hydrogen Bonds ◽  
Molecular Design ◽  
Charge Transfer Complexes ◽  
The Novel ◽  
Chiral Molecules ◽  
Intermolecular Hydrogen Bonds ◽  
Electrical Conductivities ◽  
Chiral Crystals ◽  
Hydroxy Groups

Chiral molecular crystals built up by chiral molecules without inversion centers have attracted much interest owing to their versatile functionalities related to optical, magnetic, and electrical properties. However, there is a difficulty in chiral crystal growth due to the lack of symmetry. Therefore, we made the molecular design to introduce intermolecular hydrogen bonds in chiral crystals. Racemic and enantiopure bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) derivatives possessing hydroxymethyl groups as the source of hydrogen bonds were designed. The novel racemic trans-vic-(hydroxymethyl)(methyl)-BEDT-TTF 1, and racemic and enantiopure trans-vic-bis(hydroxymethyl)-BEDT-TTF 2 were synthesized. Moreover, the preparations, crystal structure analyses, and electrical resistivity measurements of the novel achiral charge transfer salt θ21-[(S,S)-2]3[(R,R)-2]3(ClO4)2 and the chiral salt α’-[(R,R)-2]ClO4(H2O) were carried out. In the former θ21-[(S,S)-2]3[(R,R)-2]3(ClO4)2, there are two sets of three crystallographically independent donor molecules [(S,S)-2]2[(R,R)-2] in a unit cell, where the two sets are related by an inversion center. The latter α’-[(R,R)-2]ClO4(H2O) is the chiral salt with included solvent H2O, which is not isostructural with the reported chiral salt α’-[(S,S)-2]ClO4 without H2O, but has a similar donor arrangement. According to the molecular design by introduction of hydroxy groups and a ClO4 − anion, many intermediate-strength intermolecular hydrogen bonds (2.6–3.0 Å) were observed in these crystals between electron donor molecules, anions, and included H2O solvent, which improve the crystallinity and facilitate the extraction of physical properties. Both salts are semiconductors with relatively low resistivities at room temperature and activation energies of 1.2 ohm cm with E a = 86 meV for θ21-[(S,S)-2]3[(R,R)-2]3(ClO4)2 and 0.6 ohm cm with E a = 140 meV for α'-[(R,R)-2]2ClO4(H2O), respectively. The variety of donor arrangements, θ21 and two kinds of α’-types, and their electrical conductivities of charge transfer complexes based upon the racemic and enantiopure (S,S)-2, and (R,R)-2 donors originates not only from the chirality, but also the introduced intermolecular hydrogen bonds involving the hydroxymethyl groups, perchlorate anion, and the included solvent H2O.

Magnetic properties of new charge-transfer complexes based on manganese porphyrins

1997 ◽  
Vol 90 (3) ◽  
pp. 407-413
Author(s):  
MARC KELEMEN ◽  
CHRISTOPH WACHTER ◽  
HUBERT WINTER ◽  
ELMAR DORMANN ◽  
RUDOLF GOMPPER ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Charge Transfer ◽  
Charge Transfer Complexes ◽  
Manganese Porphyrins

Charge Transfer Complexation Boosts Molecular Conductance Through Fermi Level Pinning

2018 ◽  
Author(s):  
Kun Wang ◽  
Andrea Vezzoli ◽  
Iain Grace ◽  
Maeve McLaughlin ◽  
Richard Nichols ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Single Molecule ◽  
Quantum Interference ◽  
Transmission Function ◽  
Scanning Tunneling ◽  
Charge Transfer Complexes ◽  
Tunneling Microscopy ◽  
Quantum Interference Effect ◽  
Single Molecule Junctions ◽  
Charge Transfer Complexation

We have used scanning tunneling microscopy to create and study single molecule junctions with thioether-terminated oligothiophene molecules. We find that the conductance of these junctions increases upon formation of charge transfer complexes of the molecules with tetracyanoethene, and that the extent of the conductance increase is greater the longer is the oligothiophene, i.e. the lower is the conductance of the uncomplexed molecule in the junction. We use non-equilibrium Green's function transport calculations to explore the reasons for this theoretically, and find that new resonances appear in the transmission function, pinned close to the Fermi energy of the contacts, as a consequence of the charge transfer interaction. This is an example of a room temperature quantum interference effect, which in this case boosts junction conductance in contrast to earlier observations of QI that result in diminished conductance.<br>

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