Non-covalent interactions in anisole-(CO2)(n) (n=1, 2) complexes

0478540 - ÚOCHB 2018 RIV GB eng J - Journal Article
Becucci, M. - Mazzoni, F. - Pietraperzia, G. - Řezáč, Jan - Nachtigallová, Dana - Hobza, Pavel
Non-covalent interactions in anisole-(CO2)(n) (n=1, 2) complexes.
Physical Chemistry Chemical Physics. Roč. 19, č. 34 (2017), s. 22749-22758. ISSN 1463-9076. E-ISSN 1463-9084
R&D Projects: GA ČR(CZ) GBP208/12/G016
Institutional support: RVO:61388963
Keywords : density functional theory * anisole-water complex * equation of state
OECD category: Physical chemistry
Impact factor: 3.906, year: 2017

Non-covalent interactions are ubiquitous and represent a very important binding motif. The direct experimental measurement of binding energies in complexes has been elusive for a long time despite its importance, for instance, for understanding and predicting the structure of bio-macromolecules. Here, we report a combined experimental and computational analysis on the 1 : 1 and 1 : 2 clusters formed by anisole (methoxybenzene) and carbon dioxide molecules. We have obtained a detailed description of the interaction between CO2 and anisole. This system represents quite a challenging test for the presently available experimental and theoretical methods for the characterization of weakly bound molecular complexes. The results, evaluated in the framework of previous studies on anisole clusters, show a very good agreement between experimental and theoretical data. A comparison of the experimental and computational data enabled the binding energy values of the 1 : 1 and 1 : 2 clusters to be determined in the ground electronic state of the neutral and cation complex and in the first excited singlet state of the neutral complex. In addition, it was possible to adduce the presence of different 1 : 1(+) conformers, prepared by direct ionization of the 1 : 1 complex or by dissociative ionization of the 1 : 2 complex.
Permanent Link: http://hdl.handle.net/11104/0274639