A combined Raman, DFT and MD study of the solvation dynamics and the adsorption process of pyridine in silver hydrosols.
The adsorption of pyridine onto silver colloids has been investigated by Raman spectroscopy experiments and by ab initio DFT and MP2 calculations. The solvation dynamics of the pyridine in water has been studied by a molecular dynamics simulation. The results are compared with the latest available experimental and theoretical data. It is found that the pyridine is essentially hydrogen bonded to one solvent molecule. Calculations based on pyridine-water and pyridine-Ag(+) complexes allow the reproduction of the experimentally observed Raman features and explain the adsorption process of the ligand in silver hydrosols.
Laboratorio di Spettroscopia Molecolare, Dipartimento di Chimica, Università di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy.
Marco
M
Pagliai
Luca
L
Bellucci
Maurizio
M
Muniz-Miranda
Gianni
G
Cardini
Vincenzo
V
Schettino
D003102:Colloids / Q000737:chemistry; D007700:Kinetics; D008956:Models, Chemical; D008958:Models, Molecular; D011725:Pyridines / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D012995:Solubility; D013059:Spectrum Analysis, Raman; D013499:Surface Properties; D014867:Water / Q000737:chemistry
D003102:Colloids; D011725:Pyridines; D014867:Water; D012834:Silver; C023666:pyridine