Issue 10, 2001

Abstract

Novel tellurium containing fulvalene-type electron donors, triselenatellurafulvalene (TSTeF) and diselenaditellurafulvalene (DSDTeF) are synthesized by an efficient two- or three-stage procedure. They behave as superior electron donors to give highly conductive charge-transfer (CT) complexes with TCNQ. TSTeF–TCNQ shows a high conductivity of 2000 S cm−1 at room temperature and is metallic down to 85 K, where a metal–insulator (MI) transition takes place. In contrast, the conductivity of DSDTeF–TCNQ is 1400 S cm−1 at room temperature and monotonously increases down to 4.2 K without any MI transition. An X-ray structural analysis shows that TSTeF–TCNQ is crystallographically isostructural with TTF–TCNQ comprising typical one-dimensional donor and acceptor columns. On the other hand, the crystal structure of DSDTeF–TCNQ is characterized by quasi one-dimensional donor stacks with side-by-side intercolumnar interactions through Te–Se contacts, which stabilize the metallic state at low temperature.

Graphical abstract: Novel tellurium containing fulvalene-type electron donors, triselenatellurafulvalene (TSTeF) and diselenaditellurafulvalene (DSDTeF); synthesis, conductivities and crystal structures of their TCNQ complexes

Supplementary files

Article information

Article type
Paper
Submitted
17 May 2001
Accepted
11 Jul 2001
First published
21 Aug 2001

J. Mater. Chem., 2001,11, 2431-2436

Novel tellurium containing fulvalene-type electron donors, triselenatellurafulvalene (TSTeF) and diselenaditellurafulvalene (DSDTeF); synthesis, conductivities and crystal structures of their TCNQ complexes

A. Morikami, K. Takimiya, Y. Aso and T. Otsubo, J. Mater. Chem., 2001, 11, 2431 DOI: 10.1039/B104402H

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