Abstract
In order to develop novel electron donors, by structural modification to a superior electron donor, bis(ethylenedithio)-tetraselenafulvalene (BETS 2), unsymmetrical TSF derivatives ethylenedithio-propylenethio-TSF (EDT-PT-TSF 5) and ethylenedithio-propyleneseleno-TSF (EDT-PS-TSF 6) have been effectively synthesized. The synthetic method involves a one-pot formation of 1,3-diselenole-2-selones from acetylene derivatives, a cross-coupling to the TSF system, and finally a ring construction of the outer heterocycles. Electro-crystallization of S affords a series of conductive radical cation salts with BF4-, PF6-, AsF 6-, ClO4-, and SbF6 - anions, which are of the 2:1 or 3:2 composition ratio. All of the salts with 2:1 ratio are stable metals down to 4.2K without any specific phase transitions. X-ray crystallographic analyses confirm that they have so-called K-type donor arrangements.
Original language | English |
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Pages (from-to) | 189-195 |
Number of pages | 7 |
Journal | Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals |
Volume | 380 |
DOIs | |
Publication status | Published - 2002 Dec 1 |
Externally published | Yes |
Event | Proceedings of the International Chemical Congress of the Pacific Basin Societies (PACIFICHEM 2001): Proceedings of the Symposium on Twenty years of Organic Superconductors: New Materials, New Insights - Honolulu, HI, United States Duration: 2000 Dec 14 → 2000 Dec 19 |
Keywords
- Organic conductor
- Tetraselenafulvalene: radical cation salt
- X-ray crystallographic analysis
ASJC Scopus subject areas
- Condensed Matter Physics