Nature of the strong electron donor 1,3,6,8-tetrakis(dimethylamino)pyrene and ionicity of its charge transfer complexes

2001 ◽  
Vol 11 (3) ◽  
pp. 723-735 ◽  
Author(s):  
Gunzi Saito ◽  
Seiji Hirate ◽  
Kazukuni Nishimura ◽  
Hideki Yamochi
Keyword(s):  
Charge Transfer ◽  
Electron Donor ◽  
Charge Transfer Complexes ◽  
Strong Electron

Preparation of C60 Charge Transfer Complexes with Organic Donor Molecules and Alkali Doping

1997 ◽  
Vol 488 ◽  
Author(s):  
A. Otsuka ◽  
G. Saito ◽  
S. Hirate ◽  
S. Pac ◽  
T. Ishida ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Electron Donor ◽  
Mild Condition ◽  
Electronic Structures ◽  
Charge Transfer Complexes ◽  
Strong Electron ◽  
Alkali Doping ◽  
Donor Ability ◽  
Ct Complexes ◽  
Electron Donor Ability

AbstractSolid charge transfer (CT) complexes of C60 with TSeC1-TTF, EDT-TTF, EOET-TTF, and TDAP (1, 3, 6, 8-tetrakis(dimethylamino)pyrene) were newly prepared. All the obtained black crystals were proved to be neutral despite of their rather strong electron donor ability. Lattice parameters of them except for EOET-TTF complex were determined together with those of HMTTeF·C60, which had been reported with different values. Rubidium doping under a mild condition was examined on the complexes of TDAP, EOET-TTF, HMTTeF, BEDT-TTF, hydroquinone and ferrocene to search for the superconductors of new crystal and electronic structures. Among them, the rubidium-doped ferrocene complex easily showed an apparent superconducting signal in SQUID magnetization measurements. The doping effect on these CT complexes is compared to that on OMTTF complex.

scholarly journals New complexes of liquid crystal discotic triphenylenes: induction of the double gyroid phase

2021 ◽  
Author(s):  
Olga A Otmakhova ◽  
Alexey Piryazev ◽  
Galina N Bondarenko ◽  
Georgii A. Shandryuk ◽  
Alexey Merekalov ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Charge Transfer ◽  
Liquid Crystals ◽  
Electron Donor ◽  
Charge Transfer Complexes ◽  
Flexible Instrument ◽  
Donor Acceptor ◽  
Double Gyroid ◽  
The Creation

Electron donor-acceptor liquid crystals have been attracting considerable attention due to possible applications in optoelectronics and photonics. The creation of such charge transfer complexes is a powerful and flexible instrument...

Vibrational spectra of two new organic semiconductors: tetrathiafulvalene (TTF) and tetramethyltetraselenafulvalene (TMTSF) salts of paranitrophenylmalononitrile (PNMA)

1991 ◽  
Vol 69 (5) ◽  
pp. 901-907 ◽  
Author(s):  
K. D. Truong ◽  
A. D. Bandrauk ◽  
J. ZAUHAR ◽  
C. Carlose
Keyword(s):  
Raman Spectroscopy ◽  
Charge Transfer ◽  
Organic Semiconductors ◽  
Vibrational Spectra ◽  
Electron Distribution ◽  
Charge Transfer Complexes ◽  
Strong Electron ◽  
Ir And Raman ◽  
Degree Of Charge Transfer ◽  
Ftir And Raman Spectroscopy

Two new complexes of stoichiometry 2:1 are reported for the donors tetrathiafulvalene (TTF) and tetramethyltetraselenafulvalene (TMTSF) with the acceptor paranitrophenylmalononitrile (PNPMA). Both compounds are semiconductors with a resistivity of about 4 × 10−4 Ω m for (TMTSF)2PNPMA and 0.58 Ω m for (TTF)2PNPMA. The larger conductivity of the first complex can be attributed to the disorder of the PNPMA anions. Vibrational spectra were obtained by FTIR and Raman spectroscopy, in order to determine the degree of charge transfer in these systems. Both complexes have the electron distribution (D+0.4)2A−0.8. As a result the donors D stack in tetramerized units and exhibit vibronic activation of certain symmetric monomer modes, thus indicating the presence of strong electron–vibrational interactions in the donor stacks. Key words: TTF and TMTSF salts, charge transfer complexes, IR and Raman spectra, degree of charge transfer, paranitrophenylmalononitrile (PNPMA).

Sign in / Sign up

Export Citation Format

Share Document