Abstract
Cu(tatbp)I (tatbp = triazatetrabenzporphyrinato) is a quasi-one-dimensional molecular conductor that incorporates in its structure a dense array of S = 1 2 moments localized on a metal spine Cu+2 sites and interacting strongly with charge carriers on the p-π molecular orbitals of the tatbp aromatic ring. The microwave dielectric properties have been measured at 13 GHz between 2 and 300K. The a.c. conductivity is in agreement with the d.c. measurement, and its magnitude is similar to that found in other good molecular conductors. The conductivity increases from a room temperature value of σ ∼ 3 × 102Ω-1cm-1 to a maximum of ca. 7 × 102Ω-1cm-1 at T ∼ 90K; it decreases by almost three orders of magnitude at lower temperatures, but remains practically constant below 6K at σ ∼ 1Ω-1cm-1. In the same range the dielectric constant decreases with temperature, the slope being less pronounced below 7K. This temperature behaviour of both properties is not believed to be associated with a normal metal-insulator or semiconductor transition but to be related to the presence of local moments on the metal spine.
Original language | English (US) |
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Pages (from-to) | 613-616 |
Number of pages | 4 |
Journal | Solid State Communications |
Volume | 64 |
Issue number | 4 |
DOIs | |
State | Published - Oct 1987 |
Funding
Acknowledgements -- This work was supported by NSERC and FCAR. (M.P.) and by the Solid State Chemistry program of the national science foundation (grant DMR 8519233, B,M.H.)
ASJC Scopus subject areas
- General Chemistry
- Condensed Matter Physics
- Materials Chemistry