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.

Electronic Conduction in Polymers. III. Electronic Properties of Polypyrrole

1963 ◽  
Vol 16 (6) ◽  
pp. 1090 ◽  
Author(s):  
BA Bolto ◽  
R McNeill ◽  
DE Weiss
Keyword(s):  
Charge Transfer ◽  
Pyrolysis Temperature ◽  
Electron System ◽  
Charge Carriers ◽  
Charge Transfer Complexes ◽  
Spin Resonance ◽  
Broad Signal ◽  
Donor Nitrogen ◽  
P Type ◽  
Narrow Signal

The electron spin resonance absorption and electrical resistivity have been measured under rigorous conditions for a series of polypyrroles prepared over the temperature range 120-500�. When plotted as a function of pyrolysis temperature the resistivity shows a maximum in the region 200-300�. Although the resistivity of the polymers prepared at 120� and 500� is roughly similar, their e.s.r. behaviour is quite different. The low-temperature polymer, containing much complexed iodine, shows a very broad signal arising from an excited state probably associated with a polypyrrole-iodine charge-transfer complex; the high temperature polymer, containing no iodine, shows a strong narrow signal arising from the ground state of the polymer. The changes in conductivity of the polymers following the adsorption of electron acceptor or donor molecules have been measured. It is concluded that, depending on the relative amounts of electron donating or attracting chemisorbed species in relation to the concentration of donor nitrogen atoms in the polypyrrole, the polymer may behave as an intrinsic or extrinsic semiconductor with n- or p-type characteristics. Charge-transfer complexes of strength sufficient to cause partial ionization induce extrinsic behaviour by changing the ratio of the number of electrons to the number of holes. Substituent groups such as the hetero atoms which interact with the π-electron system inductively or through resonance affect only the relative mobility of the charge carriers and induce intrinsic behaviour.

Crystal growth and characterization of solvated organic charge-transfer complexes built on TTF and 9-dicyanomethylenefluorene derivatives

CrystEngComm ◽  
2015 ◽  
Vol 17 (32) ◽  
pp. 6227-6235 ◽  
Author(s):  
Amparo Salmerón-Valverde ◽  
Sylvain Bernès
Keyword(s):  
Charge Transfer ◽  
Crystal Growth ◽  
Charge Transfer Complexes ◽  
Organic Complexes ◽  
Donor Acceptor ◽  
Degree Of Charge Transfer

A series of solvated donor–acceptor organic complexes were shown to slowly release the lattice solvent while the degree of charge transfer decreases steadily. This behavior is not observed in the case of a hydrate.

scholarly journals PAH/PAH(CF 3 ) n Donor/Acceptor Charge‐Transfer Complexes in Solution and in Solid‐State Co‐Crystals

2019 ◽  
Vol 25 (59) ◽  
pp. 13547-13565 ◽  
Author(s):  
Karlee P. Castro ◽  
Eric V. Bukovsky ◽  
Igor V. Kuvychko ◽  
Nicholas J. DeWeerd ◽  
Yu‐Sheng Chen ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Solid State ◽  
Charge Transfer Complexes ◽  
Donor Acceptor

Charge Transfer Complexes of Aromatic Nitrocompounds with Disubstituted Naphthalenes. I.Spectroscopic Investigation of the Donor Behaviour of the 2,6- and 23-Dimethylnaphthalene

1984 ◽  
Vol 39 (12) ◽  
pp. 1274-1278 ◽  
Author(s):  
M. H. Abdel-Kader ◽  
R. M. Issa ◽  
M. M. Ayad ◽  
M. S. Abdel-Mottaleb
Keyword(s):  
Charge Transfer ◽  
Spectral Characteristics ◽  
Charge Transfer Complexes ◽  
Element Analysis ◽  
H Nmr ◽  
Aromatic Nitrocompounds ◽  
Donor Acceptor ◽  
The Difference ◽  
Donor Behaviour ◽  
Ct Complexes

The charge transfer complexes of 2,3- (I) and 2,6-Dimethylnaphthalenes (II) as electron donors with tri- and di-nitrobenzenes as electron acceptors are prepared and investigated by element analysis, IR. 1H nmr and electronic absorption spectroscopy. The results showed that I yields CT complexes of 1:1 type only while II is capable of forming 1 : 1 and 1 : 2 (donor: acceptor) compounds. The spectral characteristics of the CT complexes are pointed out and discussed. The difference in the donor behaviour between I and II is explained in the light of PPP-MO calculations.

scholarly journals Fermi level pinned molecular donor/acceptor junctions: reduction of induced carrier density by interfacial charge transfer complexes

2020 ◽  
Vol 8 (43) ◽  
pp. 15199-15207
Author(s):  
Paul Beyer ◽  
Eduard Meister ◽  
Timo Florian ◽  
Alexander Generalov ◽  
Wolfgang Brütting ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Fermi Level ◽  
Carrier Density ◽  
Charge Transfer Complex ◽  
Charge Transfer Complexes ◽  
Interfacial Charge Transfer ◽  
Fermi Level Pinning ◽  
Donor Acceptor ◽  
Interfacial Charge

Charge transfer complex (CPX) formation at a donor–acceptor interface reduces the amount of Fermi-level pinning induced interfacial charge transfer.

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

Double-shot inkjet printing of donor–acceptor-type organic charge-transfer complexes: Wet/nonwet definition and its use for contact engineering

2010 ◽  
Vol 518 (14) ◽  
pp. 3988-3991 ◽  
Author(s):  
Tatsuo Hasegawa ◽  
Maki Hiraoka ◽  
Toshikazu Yamada
Keyword(s):  
Charge Transfer ◽  
Inkjet Printing ◽  
Charge Transfer Complexes ◽  
Donor Acceptor ◽  
Contact Engineering
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