DICATION SALTS OF THE ORGANIC DONOR BIS(ETHYLENEDITHIO)TETRATHIAFULVALENE

被引:38
作者
CHOU, LK
QUIJADA, MA
CLEVENGER, MB
DEOLIVEIRA, GF
ABBOUD, KA
TANNER, DB
TALHAM, DR
机构
[1] UNIV FLORIDA,DEPT PHYS,GAINESVILLE,FL 32611
[2] UNIV FLORIDA,DEPT CHEM,GAINESVILLE,FL 32611
关键词
D O I
10.1021/cm00051a014
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Dication salts of the organic pi-donor bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) have been isolated as tetrafluoroborate and perchlorate salts. The salts are prepared by electrocrystallization from an oxidizing solvent mixture. Optical spectroscopy shows that BEDT-TTF is first chemically oxidized to the monocation in the electrolyte media followed by electrochemical oxidation to the dication. BEDT-TTF(BF4)(2) (1) crystallizes in the P2(1)/n space group with a = 5.824(1) Angstrom, b = 9.490(2) Angstrom, c = 17.593(3) Angstrom, beta = 91.61(1)degrees, V = 972.0(3) Angstrom(3), and Z = 2, BEDT-TTF(ClO4)(2) (2) is isostructural to the BF4- salt with a = 5.867(1) Angstrom, b = 9.579(2) Angstrom, c = 17.669(3) Angstrom, beta = 92.06(2)degrees, and V = 992.4(3) Angstrom(3). Optical transmittance spectra from 2 show no evidence for low-frequencey metallic behavior. Two localized transitions at 855 nm (11 700 cm(-1)) and 714 nm (14 000 cm(-1)), each strongly polarized along the crystallographic b axis, are observed by optical reflectance.
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页码:530 / 534
页数:5
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