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Science 14 April 1995:
Vol. 268. no. 5208, pp. 265 - 267
DOI: 10.1126/science.268.5208.265
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Articles

Spin Crossover in a Catenane Supramolecular System

José Antonio Real 1, Enrique Andrés 1, M. Carmen Muñoz 2, Miguel Julve 1, Thierry Granier 3, Azzedine Bousseksou 4, and François Varret 5

1 Departament de Química Inorgànica, Facultat de Química, Universitat de València, Dr. Moliner 50, 46100 Burjassot, València, Spain
2 Departamento de Fisica Aplicada, Universidad Politécnica de València, Camino de Vera s/n, 46071 València, Spain
3 Laboratoire de Cristallographie et de Physique Cristalline (URA 144, CNRS), Université de Bordeaux I, 33405 Talence, France
4 Laboratoire de Chimie de Coordination, 205 Route de Narbonne, 31077 Toulouse, France
5 Laboratoire d'Optique et Magnétisme, CNRS, EPJ0035, Université de Versailles, 45 Avenue des États Unis, 78035 Versailles, France

The compound [Fe(tvp)2(NCS)2] · CH3OH, where tvp is 1,2-di-(4-pyridyl)-ethylene, has been synthesized and characterized by x-ray single-crystal diffraction. It consists of two perpendicular, two-dimensional networks organized in parallel stacks of sheets made up of edge-shared [Fe(II)]4 rhombuses. The fully interlocked networks define large square channels in the [001] direction. Variable-temperature magnetic susceptibility measurements and Mössbauer studies reveal that this compound shows low-spin to high-spin crossover behavior in the temperature range from 100 to 250 kelvin. The combined structural and magnetic characterization of this kind of compound is fundamental for the interpretation of the mechanism leading to the spin crossover, which is important in the development of electronic devices such as molecular switches.

Submitted on November 11, 1994
Accepted on February 10, 1995


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Guest-Dependent Spin Crossover in a Nanoporous Molecular Framework Material.
G. J. Halder, C. J. Kepert, B. Moubaraki, K. S. Murray, and J. D. Cashion (2002)
Science 298, 1762-1765
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