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An Organic Metal Derived from a Selenium Analogue of Benzothienobenzothiophene
Author(s) -
Higashino Toshiki,
Kadoya Tomofumi,
Kumeta Shohei,
Kurata Kohei,
Kawamoto Tadashi,
Mori Takehiko
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201402221
Subject(s) - chemistry , isostructural , metal , selenium , conductivity , singlet state , electrical resistivity and conductivity , ground state , charge (physics) , benzothiophene , inorganic chemistry , stereochemistry , crystallography , crystal structure , organic chemistry , atomic physics , physics , quantum mechanics , electrical engineering , excited state , thiophene , engineering
Benzothieno[3,2‐ b ]benzothiophene (BTBT) is an excellent organic transistor material, and its charge‐transfer salt (BTBT) 2 PF 6 is an organic metal that exhibits conductivity as high as 1500 S cm –1 at room temperature. Here, we report a charge‐transfer salt of the selenium analogue, benzoseleno[3,2‐ b ]benzoselenophene (BSBS). (BSBS) 2 TaF 6 is a one‐dimensional metal isostructural to (BTBT) 2 PF 6 . The resistance jump temperature is reduced from 150 to 90 K, and the increase of the low‐temperature resistivity is largely diminished. However, the spin susceptibility shows an obvious drop below 50 K, which implies that the low‐temperature ground state is essentially a singlet state.