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Interplay of Antiferromagnetic Coupling and Spin Crossover in Dinuclear Iron(II) Complexes |
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| Authors: | Gaspar Ana B Ksenofontov Vadim Spiering Hartmut Reiman Sergey Real José A Gütlich Philipp |
| Institution: | 1.Institut für Anorganische und Analytische Chemie, Johannes Gutenberg Universit?t, Staudinger Weg 9, D-55099, Mainz, Germany ;2.Departament de Química Inorgánica/Institut de Ciéncia Molecular, Universitat de València, Doctor Moliner 50, E-46100, Burjassot, València, Spain ; |
| Abstract: | This article reports on the study of the interplay between magnetic coupling and spin transition in 2,2′-bipyrimidine (bpym)-bridged iron(II) dinuclear compounds. Coexistence of both phenomena has been observed in Fe(bpym)(NCS)2]2bpym, Fe(bpym)(NCSe)2]2bpym and Fe(bt)(NCS)2]2bpym (bpym = 2,2′-bipyrimidine, bt = 2,2′-bithiazoline) by the action of external physical factors namely pressure or electromagnetic radiation. Competition between magnetic exchange and spin crossover has been studied in Fe(bpym)(NCS)2]2bpym at 6.3 kbar. LIESST experiments carried out in Fe(bpym)(NCSe)2]2bpym and Fe(bt)(NCS)2]2bpym at 4.2 K have shown that is possible to achieve dinuclear molecules with different spin states in this class of compounds. This revised version was published online in August 2006 with corrections to the Cover Date. |
| Keywords: | spin transition Fe(II) dinuclear complexes LIESST effect magnetic field M?ssbauer spectroscopy |
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