Next Article in Journal
Post Hartree–Fock and DFT Studies on Pyrrole···Nitrogen and Pyrrole···Carbon Monoxide Molecules
Previous Article in Journal
Reverse Phase Thin Layer Chromatography of Aminoalkanethiosulfuric Acids, Mercaptoalkanamines and Aminoalkyl Disulfides
Open AccessArticle

Quantum Chemical and FTIR Spectroscopic Studies on the Linkage Isomerism of Carbon Monoxide in Alkali-Metal-Exchanged Zeolites: A Review of Current Research

1
Departamento de Química, Universidad de las Islas Baleares, 07071 Palma de Mallorca, Spain
2
Institute of Physics, St. Petersburg University, 198504 St. Petersburg, Russia
3
Dipartimento di Scienza dei Materiali ed Ingegneria Chimica, Politecnico di Torino, 10129 Turin, Italy
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2002, 3(7), 764-776; https://doi.org/10.3390/i3070764
Received: 21 May 2002 / Accepted: 13 June 2002 / Published: 30 July 2002
When adsorbed (at a low temperature) on alkali-metal-exchanged zeolites, CO forms both M(CO)+ and M(OC)+ carbonyl species with the extra-framework alkali-metal cation of the zeolite. Both quantum chemical and experimental results show that C-bondend adducts are characterized by a C−O stretching IR band at a frequency higher than that of 2143 cm-1 for free CO, while for O-bonded adducts this IR band appears below 2143 cm-1. The cation-CO interaction energy is higher for M(CO)+ than for M(OC)+ carbonyls, although the corresponding difference decreases substantially when going from Li+ to Cs+. By means of variable-temperature FTIR spectroscopy, this energy difference was determined for several alkali-metal cations, and the existence of a thermal equilibrium between M(CO)+ and M(OC)+ species was established. The current state of research in this field is reviewed here, with a view to gain more insight into the thermal isomerization process. View Full-Text
Keywords: Alkali metal carbonyls; CO adsorption; FTIR spectroscopy; Linkage isomerism; Zeolites Alkali metal carbonyls; CO adsorption; FTIR spectroscopy; Linkage isomerism; Zeolites
Show Figures

Figure 1

MDPI and ACS Style

Areán, C.O.; Palomino, G.T.; Tsyganenko, A.A.; Garrone, E. Quantum Chemical and FTIR Spectroscopic Studies on the Linkage Isomerism of Carbon Monoxide in Alkali-Metal-Exchanged Zeolites: A Review of Current Research. Int. J. Mol. Sci. 2002, 3, 764-776.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Search more from Scilit
 
Search
Back to TopTop