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

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

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.

Synthesis of Two New Polyferrocenylsilanes and Magnetic Properties of Their Charge Transfer Complexes

2007 ◽  
Vol 17 (1) ◽  
pp. 111-119 ◽  
Author(s):  
Yunyang Liu ◽  
Hongding Tang ◽  
Jingui Qin ◽  
Makoto Inokuchi ◽  
Minoru Kinoshita
Keyword(s):  
Magnetic Properties ◽  
Charge Transfer ◽  
Charge Transfer Complexes

Optical and magnetic properties of ionic charge transfer complexes based on 1,2-dicyano[60]fullerene

2002 ◽  
Vol 13 (2) ◽  
pp. 252-257 ◽  
Author(s):  
Yukihiro Yoshida ◽  
Akihiro Otsuka ◽  
Olga O. Drozdova ◽  
Kyuya Yakushi ◽  
Gunzi Saito
Keyword(s):  
Magnetic Properties ◽  
Charge Transfer ◽  
Charge Transfer Complexes ◽  
Ionic Charge ◽  
Optical And Magnetic Properties

Electron Paramagnetic Resonance Studies of Donor-Acceptor Salts in Polymer Media

1989 ◽  
Vol 173 ◽  
Author(s):  
Yang-Cheng Fann ◽  
Susan Ann Jansen
Keyword(s):  
Electrical Conductivity ◽  
Electron Paramagnetic Resonance ◽  
Magnetic Properties ◽  
Charge Transfer ◽  
Molecular Electronics ◽  
Charge Transfer Complexes ◽  
Paramagnetic Resonance ◽  
Donor Acceptor ◽  
Electron Paramagnetic ◽  
Polymeric Medium

ABSTRACTCharge transfer complexes, their inherent electrical conductivity, magnetic properties and donor-acceptor redox relationships have been a focus of much research in the last several years. One direction has been in the design of memory devices and applications in molecular electronics.1,2 Our work has focused on analysis of such processes in a polymeric medium. Polycarbonate films of 7,7’,8,8’-Tetracyanoquinodimethane (TCNQ) and o-tolidine (o-T) complexes were studied by EPR spectroscopy from 100-300K. EPR spectra and magnetic susceptibility of the dispersed charge-transfer complexes are presented and compared with the pristine materials. These studies were carried out as a function of donor/acceptor stoichiometry and concentration within the polymer matrix. Saturation studies show significant differences as the composition varies. In addition the g-tensor and linewidth are strongly dependent on temperature and composition.

Electrical and magnetic properties of some organic charge transfer complexes

1972 ◽  
Vol 4 (4) ◽  
pp. 449-451 ◽  
Author(s):  
I. N. Bazhina ◽  
V. S. Versilov ◽  
V. S. Grechishkin ◽  
R. V. Grechishkina ◽  
V. M. Gusarov ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Charge Transfer ◽  
Charge Transfer Complexes ◽  
Electrical And Magnetic Properties

scholarly journals Trifluoromethyl-substituted tetrathiafulvalenes

2015 ◽  
Vol 11 ◽  
pp. 647-658 ◽  
Author(s):  
Olivier Jeannin ◽  
Frédéric Barrière ◽  
Marc Fourmigué
Keyword(s):  
Charge Transfer ◽  
Absorption Band ◽  
Cation Radical ◽  
Radical Cations ◽  
Oxidation Potential ◽  
Low Energy ◽  
Charge Transfer Complexes ◽  
Mesomeric Effect ◽  
Oxidation Potentials ◽  
Homo Lumo

A series of tetrathiafulvalenes functionalized with one or two trifluoromethyl electron-withdrawing groups (EWG) is obtained by phosphite coupling involving CF3-substituted 1,3-dithiole-2-one derivatives. The relative effects of the EWG such as CF3, CO2Me and CN on the TTF core were investigated from a combination of structural, electrochemical, spectrochemical and theoretical investigations. Electrochemical data confirm the good correlations between the first oxidation potential of the TTF derivatives and the σmeta Hammet parameter, thus in the order CO2Me < CF3 < CN, indicating that, in any case, the mesomeric effect of the substituents is limited. Besides, crystal structure determinations show that the deformation of the unsymmetrically substituted dithiole rings, when bearing one, or two different EWG, and attributed to the mesomeric effect of ester or nitrile groups, is not notably modified or counter-balanced by the introduction of a neighboring trifluoromethyl group. DFT calculations confirm these observations and also show that the low energy HOMO–LUMO absorption band found in nitrile or ester-substituted TTFs is not found in TTF-CF3, where, as in TTF itself, the low energy absorption band is essentially attributable to a HOMO→LUMO + 1 transition. Despite relatively high oxidation potentials, these donor molecules with CF3 EWG can be involved in charge transfer complexes or cation radical salts, as reported here for the CF3-subsituted EDT-TTF donor molecule. A neutral charge transfer complex with TCNQ, (EDT-TTF-CF3)2(TCNQ) was isolated and characterized through alternated stacks of EDT-TTF-CF3 dimers and TCNQ in the solid state. A radical cation salt of EDT-TTF-CF3 is also obtained upon electrocrystallisation in the presence of the FeCl4 − anion. In this salt, formulated as (EDT-TTF-CF3)(FeCl4), the (EDT-TTF-CF3)+• radical cations are associated two-by-two into centrosymmetric dyads with a strong pairing of the radical species in a singlet state.

1,1'-Disubstituted Ferrocenes as Donors for Charge-Transfer Complexes. Synthesis, Structure, Conductivity, and Magnetic Properties

1994 ◽  
Vol 13 (4) ◽  
pp. 1224-1234 ◽  
Author(s):  
Antonio Togni ◽  
Markus Hobi ◽  
Grety Rihs ◽  
Guenther Rist ◽  
Alberto Albinati ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Charge Transfer ◽  
Charge Transfer Complexes

Magnetic properties of charge transfer complexes of manganese porphyrin derivatives and tetracyanoethylene

1997 ◽  
Vol 85 (1-3) ◽  
pp. 1701-1702 ◽  
Author(s):  
Keiji Nagai ◽  
Tomokazu Iyoda ◽  
Akira Fujishima ◽  
Kazuhito Hashimoto
Keyword(s):  
Magnetic Properties ◽  
Charge Transfer ◽  
Charge Transfer Complexes ◽  
Manganese Porphyrin ◽  
Porphyrin Derivatives
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