Influence of Metal Dilution on the Light-Induced Spin Transition in Two 1D Chain Compounds: [FexZn1-x(btzp)3](BF4)2 and [FexZn1-x(endi)3](BF4)2 {btzp = 1,2-Bis(tetrazol-1-yl)propane and endi = 1,2-Bis(tetrazol-1-yl)ethane}

• Published in: European Journal of Inorganic Chemistry 2008-12, Vol.2008 (34), p.5382-5389
• Main Authors: Baldé, Chérif, Desplanches, Cédric, Grunert, Matthias, Wei, Yongli, Gütlich, Philipp, Létard, Jean-François
• Format: Article
• Language: English
• Subjects: Chemical Sciences; Dilution effects; Iron; Magnetic properties; Material chemistry; Photomagnetism; Spin crossover
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.200800570

The thermal and light‐induced spin transitions in [FexZn1–x(btzp)3](BF4)2 and [FexZn1–x(endi)3](BF4)2 {btzp = 1,2‐bis(tetrazol‐1‐yl)propane; endi = 1,2‐bis(tetrazol‐1‐yl)ethane} chain compounds have been investigated by magnetic susceptibility, photomagnetism and diffuse reflectivity measurements. These compounds display a thermal spin transition and the Light‐Induced Excited Spin State Trapping (LIESST) effect at low temperature. For each compound, the thermal spin transition temperature, T1/2, and the relaxation temperature of the photo‐induced high‐spin state, T(LIESST), have been systematically determined. A decrease in T1/2 induces an increase in T(LIESST). The results are discussed and compared with some other “metal‐diluted” iron(II) spin crossover (SCO) complexes. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008) Thermal spin transition and Light‐Induced Excited Spin State Trapping (LIESST) studies have been undertaken on a series of zinc‐diluted polymeric chain iron(II)complexes. The relationship between T(LIESST) and dilution by zinc(II) on these systems is discussed.