Please use this identifier to cite or link to this item:
Title: A sequential method to prepare polymorphsand solvatomorphs of [Fe(1,3-bpp)2](ClO4)2·nH2O( n=0, 1, 2) with varying spin-crossover behaviour
Author: Bartual-Murgui, Carlos
Codina, Carlota
Roubeau, Olivier
Aromí Bedmar, Guillem
Keywords: Compostos de ferro
Polimorfisme (Cristal·lografia)
Iron compounds
Polymorphism (Crystallography)
Issue Date: 2-Aug-2016
Publisher: Wiley-VCH
Abstract: Two polymorphs of the spin crossover (SCO) compound [Fe(1,3bpp)2](ClO4)2 (1 and 2; 1,3bpp, 2-(pyrazol-1-yl)-6-(pyrazol-3-yl)-pyridine) are prepared using a novel, stepwise procedure. Crystals of 1 deposit from dry solvents while 2 is obtained from a solid-state procedure, by sequentially removing lattice H2O molecules from the solvatomorph [Fe(1,3bpp)2](ClO4)2·2H2O (2·2H2O), using single-crystal-to-single-crystal (SCSC) transformations. Hydrate 2·2H2O is obtained through the same reaction as 1, now with 2.5% of added water. Compounds 2 and 2·2H2O are unstable in the atmosphere and absorb or lose one equivalent of water, respectively, to both yield the stable solvatomorph [Fe(1,3bpp)2](ClO4)2·H2O (2·H2O), also following SCSC processes. The four derivatives have been characterized by single crystal X-ray diffraction (SCXRD). Furthermore, the homogeneity of the various compounds as well as their SCSC interconversions have been confirmed by powder X-ray diffraction (PXRD). Polymorphs 1/2 exhibit abrupt SCO near room temperature with T1/2↑ = 279/316 K and T1/2↓ = 276/314 K (near 40 K of shift) and different cooperativity.
Note: Versió postprint del document publicat a:
It is part of: Chemistry-A European Journal, 2016, vol. 22, num. 36, p. 12767-12776
Related resource:
ISSN: 0947-6539
Appears in Collections:Articles publicats en revistes (Química Inorgànica i Orgànica)

Files in This Item:
File Description SizeFormat 
667417.pdf900.73 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.