Jean-François Létard

TL;DR: In this article, clean evaporation under ultra-high vacuum conditions of two spin crossover materials, yielding either microcrystallites or homogeneous thin films, was reported, showing that thermal and light-induced spin crossover properties are preserved.

TL;DR: In this paper, the crystal structures of four Fe(PM-L) compounds were determined, both in high and low spin state, and the crystal packing is similar in all of the structures except that the intermolecular interactions, classified as intra- and inter-sheet, show some differences.

TL;DR: This study definitively proves the 1-D polymeric nature of the crystal structure and allows a description of the [Fe(Rtrz)(3)] chains, as well as of the anions and water implementation within the crystal lattice opening the possibility of subsequent investigations of the structure-property correlation within this peculiar family of spin transition compounds.

TL;DR: A two-step magnetic spin transition with accompanying structural phase transitions is reported for the first time for Fe III, and contains an unprecedented [HS-HS-LS] motif with tripling of the unit cell.

TL;DR: Three analogous one dimensional (1D) polymeric iron(II) spin crossover (SCO) materials containing the new ligand 4,6-bis(2',2''-pyridyl)pyrazine (bdpp) have been comprehensively characterised magnetically and structurally and relaxation studies on the HS fraction fitted well to a stretched exponential model with kinetic parameters indicative of weak cooperativity.