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Bulk Spontaneous Magnetization in the New Radical Cation Salt TM-TTF[Cr(NCS)(isoquinoline)] (TM-TTF = Tetramethyltetrathiafulvalene)

Mas-Torrent, M, Vidal-Gancedo, J, Ribas, X, Veciana, J, Rovira, C, Turner, SS, Day, P and Wurst, K (2003) Bulk Spontaneous Magnetization in the New Radical Cation Salt TM-TTF[Cr(NCS)(isoquinoline)] (TM-TTF = Tetramethyltetrathiafulvalene) Inorganic Chemistry, 42 (23). pp. 7544-7549.

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Abstract

A new organic-inorganic hybrid salt [TM-TTF][Cr(NCS) (isoquinoline)] (1) (TM-TTF = Tetramethyltetrathiafulvalene) has been synthesized. Compound 1 crystallizes in the triclinic P1 space group with a = 8.269(1), b = 10.211(2), and c = 11.176(2) Å, α = 89.244(9), β = 88.114(6), and γ = 74.277(7)°, V = 907.6(3) Å, and Z = 1. The crystal structure was resolved in the temperature range between 223 and 123 K, showing that changes in the crystal structure at low temperature result in stronger interactions between anions and cations. The packing of 1 consists of mixed anion-cation layers in the bc plane containing S···S and π-π anion-cation interactions, the layers being connected by very short S···S contacts between anions and cations. Magnetic measurements in a small external field show bulk spontaneous magnetization with a T of 6.6 K consistent with the presence of weakly coupled ferrimagnetic order in compound 1. The EPR measurements also demonstrate the interaction between the d and π electrons and the presence of an internal magnetic field brought about by the magnetic ordering.

Item Type: Article
Authors :
AuthorsEmailORCID
Mas-Torrent, MUNSPECIFIEDUNSPECIFIED
Vidal-Gancedo, JUNSPECIFIEDUNSPECIFIED
Ribas, XUNSPECIFIEDUNSPECIFIED
Veciana, JUNSPECIFIEDUNSPECIFIED
Rovira, CUNSPECIFIEDUNSPECIFIED
Turner, SSUNSPECIFIEDUNSPECIFIED
Day, PUNSPECIFIEDUNSPECIFIED
Wurst, KUNSPECIFIEDUNSPECIFIED
Date : 17 November 2003
Identification Number : https://doi.org/10.1021/ic034379c
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 13:22
Last Modified : 28 Mar 2017 13:22
URI: http://epubs.surrey.ac.uk/id/eprint/802894

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