Interfacial interactions between aqueous solutions of 4,4'-bipyridyl and mercury

1987 ◽  
Vol 52 (1) ◽  
pp. 54-65 ◽  
Author(s):  
Michael Heyrovský ◽  
Ladislav Novotný
Keyword(s):  
Charge Transfer ◽  
Acid Solution ◽  
Electrode Surface ◽  
Negative Charge ◽  
Cation Radical ◽  
Simultaneous Increase ◽  
Neutral Solution ◽  
Adsorbed State ◽  
Langmuir Coefficient ◽  
Drop Time

From analysis of electrocapillary curves obtained by drop-time measurements with spindle-type capillary and the method of controlled convection the data on reversible equilibrium adsorption of 4,4'-bipyridyl on mercury from aqueous 0·1M solutions of Na2SO4 and H2SO4 were obtained. In neutral solution 4,4'-bipyridyl is strongly adsorbed: at potential of maximum adsorption the Langmuir coefficient β = 1.4 . 102 m3 mol-1 and Γm = 1.8 . 10-6 mol m-2; in acid solution the adsorption of the doubly protonated 4,4'-bipyridylium cation is weaker and its potential dependence goes through a minimum. The increase of adsorption of the bipyridylium cation and a simultaneous increase of negative charge with increasing negative potential are explained by charge transfer in adsorbed state. The electroreduction of 4,4'-bipyridyl is preceded by formation at the electrode surface of a layer of sparingly soluble salt of the bipyridyl cation radical.

New π -Donor Molecules with a Pyrazino Group and their Conducting Salts

2001 ◽  
Vol 56 (3) ◽  
pp. 297-300 ◽  
Author(s):  
G. C. Papavassiliou ◽  
Yohji Misaki ◽  
Kazuko Takahashi ◽  
Jun-ichi Yamada ◽  
G. A. Mousdis ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Cation Radical ◽  
Charge Transfer Complexes ◽  
Edge Group

Abstract The preparation and characterization of some π-donors with a pyrazine-edge-group as well as with tetrathiapentalene-, thiophene-, and dihydrobenzoselenophene-spacer-groups are de­ scribed. Some of these donors give conducting charge transfer complexes with TCNQ and/or cation radical salts with I3-, BF4-and PF6-as counter anions.

scholarly journals Anomalous charge and negative-charge-transfer insulating state in cuprate chain compoundKCuO2

2015 ◽  
Vol 92 (20) ◽  
Author(s):  
D. Choudhury ◽  
P. Rivero ◽  
D. Meyers ◽  
X. Liu ◽  
Y. Cao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Negative Charge

Absorption spectra of field-generated cation radical in triphenyldiamine film: Lack of intervalence-charge transfer band

2010 ◽  
Vol 485 (1-3) ◽  
pp. 100-103 ◽  
Author(s):  
Yutaka Harima ◽  
Yasushi Ishiguro ◽  
Youhei Fujikawa ◽  
Takahiro Hashiguchi ◽  
Kenji Komaguchi ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Absorption Spectra ◽  
Charge Transfer Band ◽  
Cation Radical ◽  
Intervalence Charge Transfer

scholarly journals Mechanism of hydrogen adsorption on gold nanoparticles and charge transfer probed by anisotropic surface plasmon resonance

2017 ◽  
Vol 19 (40) ◽  
pp. 27397-27405 ◽  
Author(s):  
William L. Watkins ◽  
Yves Borensztein
Keyword(s):  
Gold Nanoparticles ◽  
Surface Plasmon Resonance ◽  
Charge Transfer ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Negative Charge ◽  
Hydrogen Adsorption ◽  
Anisotropic Surface

The adsorption of dihydrogen on gold nanoparticles is observed by a shift in the surface plasmon resonance of gold, during argon/hydrogen cycles. This is induced by the dissociation of the H2 molecules and negative charge transfer from Au to Au–H bondings.

Origin of the Band Gap in the Negative Charge-Transfer-Energy Compound NaCuO2

1993 ◽  
Vol 70 (10) ◽  
pp. 1565-1565 ◽  
Author(s):  
T. Mizokawa ◽  
H. Namatame ◽  
A. Fujimori ◽  
K. Akeyama ◽  
H. Kondoh ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Band Gap ◽  
Negative Charge ◽  
Transfer Energy ◽  
Charge Transfer Energy

scholarly journals Electronic structure of negative charge transfer CaFeO3 across the metal-insulator transition

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Paul C. Rogge ◽  
Ravini U. Chandrasena ◽  
Antonio Cammarata ◽  
Robert J. Green ◽  
Padraic Shafer ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Charge Transfer ◽  
Negative Charge ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator

Electronic structure and band gap of the negative charge-transfer material Sr3Fe2O7

2004 ◽  
Vol 129 (2) ◽  
pp. 113-116 ◽  
Author(s):  
M. Abbate ◽  
H. Ascolani ◽  
F. Prado ◽  
A. Caneiro
Keyword(s):  
Electronic Structure ◽  
Charge Transfer ◽  
Band Gap ◽  
Negative Charge

Different Magnetic Properties of Charge-Transfer Complexes and Cation Radical Salts of Tetrathiafulvalene Derivatives Substituted with Imino Pyrolidine- and Piperidine-1-oxyls

1993 ◽  
Vol 22 (11) ◽  
pp. 1817-1820 ◽  
Author(s):  
Toyonari Sugimoto ◽  
Seiji Yamaga ◽  
Makoto Nakai ◽  
Masaya Tsujii ◽  
Hiroshi Nakatsuji ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Charge Transfer ◽  
Cation Radical ◽  
Charge Transfer Complexes
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