Synthesis and characterization of an extended tetrathiafulvalene derivative coordinated to copper iodide and its charge-transfer and radical ion salts

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J. Ramos, V. M. Yartsev, S. Golhen, L. Ouahab and P. Delhaès


Abstract

A new bisfunctional TTF type donor molecule (D–σ–D) with a copper iodine bridge has been synthesized and characterized. Its salts have been prepared using standard crystallization techniques. The structural, electrical, optical and low-temperature magnetic properties of these new compounds have been investigated. It has been shown in particular that the compound (D–σ–D)(TCNQ)3 presents a low-temperature magnetic ground state which is connected to the antiferromagnetic interactions of the bis-radical cation. This result opens the way to prepare new extended-hybrid TTF molecules containing paramagnetic metals showing related magnetic and electrical properties.


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