Spectroscopic Investigation of Size-dependent CO Binding on Cationic Copper Clusters: Analysis of the CO Asymmetric Stretch

Overview

Journal Phys Chem Chem Phys

Publisher Royal Society of Chemistry

Specialties Biophysics
Chemistry

Date 2024 Jul 17

PMID 39015096

Authors

A M Reider

M Szalay

J Reichegger

J Barabas

M Schmidt

M Kappe

T Holtzl

P Scheier

O V Lushchikova

Affiliations

Soon will be listed here.

Abstract

Photofragmentation spectroscopy, combined with quantum chemical computations, was employed to investigate the position of the asymmetric CO stretch in cold, He-tagged Cu[CO] ( = 1-10) and Cu[CO][HO] ( = 1-7) complexes. A blue shift in the band position was observed compared to the free CO molecule for Cu[CO] complexes. Furthermore, this shift was found to exhibit a notable dependence on cluster size, progressively redshifting with increasing cluster size. The computations revealed that the CO binding energy is the highest for Cu and continuously decreases with increasing cluster size. This dependency could be explained by highlighting the role of polarization in electronic structure, according to energy decomposition analysis. The introduction of water to this complex amplified the redshift of the asymmetric stretch, showing a similar dependency on the cluster size as observed for Cu[CO] complexes.

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