A family of discrete magnetaically switchable nanoballs

B. Duriska Martin (1) , Suzanne M. Neville (1) , Boujemaa Moubaraki (1) , Keith S. Murray (1) , Cherif Baldé (2, 3) , Jean-François Létard (2) , Cameron J. Kepert (4) , Stuart R. Batten (1)

1 School of Chemistry
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
3 LCPM - Laboratoire de Chimie et Physique des Matériaux
4 School of Chemistry

The thermal and light-induced magnetic properties of a family of discrete magnetically switchable "nanoball" species (3 nm in diameter) is reported. The self-assembly of these materials is accomplished by the use of the metallo building block, [Cu([Tp4-py])(NCCH3)] ([Tp4-py]=tris-[3-(4'-pyridyl)pyrazol-1-yl]hydroborate), combined with a [Fe(NCX)2] (X=S, Se and BH3) species. We previously showed that the thiocyanate analogue (Fe(NCS)-nano) undergoes a thermal and light-induced spin crossover (SCO)--the largest such discrete SCO material reported. Now included in this family are the Se and BH3 analogues, Fe(NCSe)-nano and Fe(NCBH3)-nano, which show increased thermal transition temperatures (T1/2=124 K, 162 and 173 K). This variation in transition temperature over the series S

Mots clés: Discrete; Iron; LIESST; Spin crossover; Supramolecules

Domaines: Matériaux

B. Duriska Martin, Suzanne M. Neville, Boujemaa Moubaraki, Keith S. Murray, Cherif Baldé, et al.. A family of discrete magnetaically switchable nanoballs. ChemPlusChem, 2012, 77 (8), pp.616-623. ⟨10.1002/cplu.201200123⟩. ⟨hal-00747368⟩