Enhanced porosity in a new 3D Hofmann-like network exhibiting humidity sensitive cooperative spin transitions at room temperature

Carlos Bartual-Murgui; Norma A. Ortega-Villar; Helena J. Shepherd; M. Carmen Muñoz; Lionel Salmon; Gábor Molnár; Azzedine Bousseksou; José Antonio Real

doi:10.1039/C0JM04387G

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Journal of Materials Chemistry

Issue 20, 2011

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Enhanced porosity in a new 3D Hofmann-like network exhibiting humidity sensitive cooperative spin transitions at room temperature

Carlos Bartual-Murgui , Norma A. Ortega-Villar , Helena J. Shepherd , M. Carmen Muñoz , Lionel Salmon , Gábor Molnár , Azzedine Bousseksou and José Antonio Real

J. Mater. Chem., 2011,21, 7217-7222

DOI: 10.1039/C0JM04387G
Received 15 Dec 2010, Accepted 16 Mar 2011
First published on the web 14 Apr 2011

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Abstract
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The porous coordination polymers (PCPs) of general formula {Fe(bpac)[M(CN)₄]}·guest (M = Pt, Pd) exhibit larger channels than previously synthesised 3D-Hofmann-like PCP. The channels are partially occupied by uncoordinated guest bpac ligands and labile H₂O molecules. These PCPs exhibit very scarce cooperative spin crossover behaviour around room temperature with a large hysteresis loop (up to 49 K) and also display sensitivity to humidity and guest molecules. The inclusion of bpac molecules in the 3D network can be avoided by adding competitive volatile molecules during the crystallization process, affording the guest-free material. The spin crossover behavior of different guest and guest-free materials is also presented.