title: High-temperature photo-induced switching and pressure-induced transition in a cooperative molecular spin-crossover material.
abstract: The thermal and photo-induced switching properties of the recently published molecular spin crossover complex [Fe(H4L)2](ClO4)2·H2O·2(CH3)2CO () have been investigated in detail through Raman spectroscopy. Magnetometric and single crystal X-ray diffraction kinetic studies within the hysteresis loop have proven its metastable character, which allowed establishing the shape of the true, quasi-static hysteresis loop. This is related to the proximity of the temperatures of the thermal high to low spin SCO (T1/2↓) to those of the relaxation of the thermally or photo-generated metastable states (T(TIESST) and T(LIESST), respectively). Green light irradiation within the hysteresis loop results in a complete low to high spin photo-switch. In addition, the SCO of at room temperature can be induced by applying pressure, as followed by Raman spectroscopy.
authors.affiliation: Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain. guillem.aromi@qi.ub.es.
authors.forename: Gavin A
authors.initials: GA
authors.lastname: Craig
authors.forename: Jose Sánchez
authors.initials: JS
authors.lastname: Costa
authors.forename: Olivier
authors.initials: O
authors.lastname: Roubeau
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Teat
authors.forename: Helena J
authors.initials: HJ
authors.lastname: Shepherd
authors.forename: Manuel
authors.initials: M
authors.lastname: Lopes
authors.forename: Gábor
authors.initials: G
authors.lastname: Molnár
authors.forename: Azzedine
authors.initials: A
authors.lastname: Bousseksou
authors.forename: Guillem
authors.initials: G
authors.lastname: Aromí