Nanoparticles of iron(II) spin-crossover.

We report the synthesis of spin crossover 69 nm spherical nanoparticles of [Fe(NH2-trz)3](Br)2.3H2O.0.03(surfactant) (NH2trz = 4-amino-1,2,4-triazole, surfactant = Lauropal), prepared by the reverse micelle technique, which exhibit at room temperature a thermal hysteresis characterized by magnetic, diffuse reflectivity and Raman studies.

[1]  O. Kahn,et al.  Spin-Transition Polymers: From Molecular Materials Toward Memory Devices , 1998 .

[2]  Mei Li,et al.  Synthesis of Prussian Blue Nanoparticles and Nanocrystal Superlattices in Reverse Microemulsions , 2000 .

[3]  G. Molnár,et al.  Multilayer sequential assembly of thin films that display room-temperature spin crossover with hysteresis. , 2006, Angewandte Chemie.

[4]  P. Gütlich,et al.  Photoswitchable coordination compounds , 2001 .

[5]  E. Rivière,et al.  Cyanide‐Bridged CrIII–NiII Superparamagnetic Nanoparticles , 2003 .

[6]  Olivier Kahn,et al.  Spin Transition Molecular Materials for displays and data recording , 1992 .

[7]  Marcos Pita,et al.  Functionalization of thioctic acid-capped gold nanoparticles for specific immobilization of histidine-tagged proteins. , 2005, Journal of the American Chemical Society.

[8]  Eugenio Coronado,et al.  Bistable Spin‐Crossover Nanoparticles Showing Magnetic Thermal Hysteresis near Room Temperature , 2007 .

[9]  Christopher J. Kiely,et al.  Synthesis and reactions of functionalised gold nanoparticles , 1995 .

[10]  A. Spek,et al.  Synthesis, Structure, Magnetic Behavior, and Mössbauer Spectroscopy of Two New Iron(II) Spin-Transition Compounds with the Ligand 4-Isopropyl-1,2,4-triazole. X-ray Structure of [Fe(3)(4-isopropyl-1,2,4-triazole)(6)(H(2)O)(6)](tosylate)(6).2H(2)O. , 1997, Inorganic chemistry.

[11]  V. Ksenofontov,et al.  Bipyrimidine‐Bridged Dinuclear Iron(II) Spin Crossover Compounds , 2005 .

[12]  Jean-François Létard,et al.  Towards spin crossover applications , 2004 .

[13]  P. Gütlich,et al.  Supramolecular spintronic devices: spin transitions and magnetostructural correlations in [Fe4IIL4]8+ [2x2]-grid-type complexes. , 2003, Chemistry.

[14]  B. Manoun,et al.  Low‐wavenumber Raman spectra of the spin‐transition complexes [Fe(NH2 trz)3](ClO4)2 and [Fe(Htrz)3](ClO4)2 , 2001 .

[15]  Philipp Gütlich,et al.  Thermal and Optical Switching of Iron(II) Complexes , 1994 .

[16]  Christophe Vieu,et al.  A Combined Top‐Down/Bottom‐Up Approach for the Nanoscale Patterning of Spin‐Crossover Coordination Polymers , 2007 .