title: Drastic effect of lattice propionitrile molecules on the spin-transition temperature of a 2,2'-dipyridylamino/s-triazine-based iron(II) complex.
abstract: Reaction of iron(II) selenocyanate (obtained from Fe(ClO4)2 and KNCSe) with 2-(N,N-bis(2-pyridyl)amino)-4,6-bis(pentafluorophenoxy)-(1,3,5)triazine (L1(F)) in propionitrile produces the compound [Fe(L1(F))2(NCSe)2]·2CH3CH2CN (1(NCSe)·2PrCN), which shows spin-crossover (SCO) properties characterized by a T(1/2) of 283 K and a ΔT80 (i.e., temperature range within which 80% of the transition considered occurs) of about 65 K. Upon air exposure, 1(NCSe)·2PrCN gradually converts to a new SCO species that exhibits different properties, as reflected by T(1/2) = 220 K and ΔT80 = 70 K. Various characterization techniques, namely, IR spectroscopy, thermogravimetric analysis, and thermodiffractometric studies, reveal that the new phase is obtained through the loss of the lattice propionitrile molecules within several days upon air exposure or several hours upon heating above 390 K.
authors.affiliation: Departament de Química Inorgànica, Universitat de Barcelona , Martí i Franquès 1-11, 08028 Barcelona, Spain.
authors.forename: Nanthawat
authors.initials: N
authors.lastname: Wannarit
authors.forename: Nassim
authors.initials: N
authors.lastname: Nassirinia
authors.forename: Saeid
authors.initials: S
authors.lastname: Amani
authors.forename: Norberto
authors.initials: N
authors.lastname: Masciocchi
authors.forename: Sujittra
authors.initials: S
authors.lastname: Youngme
authors.forename: Olivier
authors.initials: O
authors.lastname: Roubeau
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Teat
authors.forename: Patrick
authors.initials: P
authors.lastname: Gamez