CO adsorption on cpo-27-ni coordination polymer: spectroscopic features and interaction energy

Sachin Chavan, Jenny G. Vitillo, Elena Groppo, Francesca Bonino, Carlo Lamberti, Pascal D C Dietzel, Silvia Bordiga

Research output: Contribution to journalArticlepeer-review

104 Scopus citations

Abstract

The microporous metal-organic framework Ni2(dhtp) (H 4dhtp ) 2,5-dihydroxyterephtalic acid) is a 3D network that maintains crystallinity and porosity after solvent removal. A mild thermal treatment in high vacuo at 393 K removes completely water allowing to obtain a MOF material with honeycomb structure able to strongly coordinate CO at room temperature. In this contribution, the reactivity toward CO of CPO-27-Ni has been studied by the combined use of infrared, extended X-ray absorption fine structure, X-ray absorption near edge structure, and UV-vis spectropies and microcalorimetry. Most of the Ni2+ sites are involved in the interaction (about 80%), forming 1:1 linear adducts whose interaction enthalpy is slightly above 50 kJ/mol. In the presence of CO, a large modification of the vibrational and electronic properties of the material with respect to the dehydrated one has been observed.

Original languageEnglish (US)
Pages (from-to)3292-3299
Number of pages8
JournalJournal of Physical Chemistry C
Volume113
Issue number8
DOIs
StatePublished - Feb 26 2009

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