title: Selective photoswitching of the binuclear spin crossover compound {[Fe(bt)(NCS)2]2(bpm)} into two distinct macroscopic phases.
abstract: The low-spin (LS-LS, S = 0) diamagnetic form of the binuclear spin crossover complex {[Fe(bt)(NCS)(2)](2)(bpm)} was selectively photoconverted into two distinct macroscopic phases at different excitation wavelengths (1342 or 647.1 nm). These long-lived metastable phases have been identified, respectively, as the symmetry-broken paramagnetic form (HS-LS, S = 2) and the antiferromagnetically coupled (HS-HS, S = 0) high-spin form of the compound. The selectivity may be explained by the strong coupling of the primary excited states to the paramagnetic state.
authors.affiliation: Laboratoire de Chimie de Coordination, CNRS UPR-8241, 205 route de Narbonne, F-31077 Toulouse, France.
authors.forename: N Ould
authors.initials: NO
authors.lastname: Moussa
authors.forename: G
authors.initials: G
authors.lastname: Molnár
authors.forename: S
authors.initials: S
authors.lastname: Bonhommeau
authors.forename: A
authors.initials: A
authors.lastname: Zwick
authors.forename: S
authors.initials: S
authors.lastname: Mouri
authors.forename: K
authors.initials: K
authors.lastname: Tanaka
authors.forename: J A
authors.initials: JA
authors.lastname: Real
authors.forename: A
authors.initials: A
authors.lastname: Bousseksou