title: Monitoring dehydration of the organic-inorganic [(C3H7)4N][SnCl5(H2O)]·2H2O compound using simultaneous thermal and Raman studies.
abstract: In this work we report the experimental studies of the structural phase transition in the [(C3H7)4N]SnCl5(H2O)]·2H2O compound by differential scanning calorimetric (DSC) and Raman spectroscopic. The X-ray powder diffraction study of the [(C3H7)4N][SnCl5(H2O)]·2H2O sample at room temperature showed that this compound is monoclinic and has P121/c1 space group. Differential scanning calorimetric disclosed two types of phase transitions in the temperature range 356-376 (T1) K and at 393K (T2) characterized, by a loss of water molecules and probably a reconstruction of new anionic parts after T2 transition. The Raman scattering spectra recorded at various temperatures in the wavenumber range from 100 to 3800cm(-1) covering the domains of existence of changes in the vicinity of the two phase transitions detected by DSC measurement. A detailed study of the spectral parameters (wave number, reduced intensity and the full width at half maximum) as a function of temperature of a chosen band, associated with (νs(SnO)+νs(SnCl)), based on an order-disorder model allowed us to obtain information relative to the activation energy and correlation length.
authors.affiliation: Unité de recherche de la matière condensée, Faculté des Sciences de Sfax, Université de Sfax, BP 1171, 3000 Sfax, Tunisia. Electronic address: hajlaouisondes@yahoo.fr.
authors.forename: S
authors.initials: S
authors.lastname: Hajlaoui
authors.affiliation: Unité de recherche de la matière condensée, Faculté des Sciences de Sfax, Université de Sfax, BP 1171, 3000 Sfax, Tunisia.
authors.forename: I
authors.initials: I
authors.lastname: Chaabane
authors.affiliation: Unité de recherche de la matière condensée, Faculté des Sciences de Sfax, Université de Sfax, BP 1171, 3000 Sfax, Tunisia.
authors.forename: K
authors.initials: K
authors.lastname: Guidara
authors.affiliation: LUNAM Université, Université du Maine, CNRS UMR 6283, Institut des Molécules et Matériaux du Mans (IMMM), Avenue Olivier Messiaen Cedex 9, 72085 Le Mans, France.
authors.forename: A
authors.initials: A
authors.lastname: Bulou
keywords: DSC measurement|; Phase transition; Raman spectroscopy; X-ray powder diffraction; [(C(3)H(7))(4)N][SnCl(5)(H(2)O)]·2H(2)O compound