title: Conformational landscape of supersonically expanded 1-(fluorophenyl)ethanols and their monohydrated clusters.
abstract: The effects of the presence of the ring fluorine atom on the conformational landscape of supersonically expanded isomeric 1-(fluorophenyl)ethanols and their monohydrated clusters are investigated by resonant two-photon ionization (R2PI) spectroscopy, coupled with time-of-flight (TOF) mass spectrometry. In contrast to the very simple spectrum of 1-phenylethanol, the lack of structural symmetry of the aromatic rings of isomeric 1-(fluorophenyl)ethanols generates more complicated spectra, characterized by several low-frequency progressions of bands. Their interpretation is based on the strict correspondence with theoretical predictions at the D-B3LYP/6-31G** level of theory. Monohydration of the 1-(fluorophenyl)ethanol isomers favours exclusive formation of the corresponding conformers, characterized by the O-H...O(w)-H...pi intracomplex interaction and whose excitation spectrum exhibits features attributed to the C(1)-C(alpha) torsion plus intermolecular water torsion.
authors.affiliation: Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza, Università di Roma, P. le Aldo Moro 5, 00185 Roma, Italy. maurizio.speranza@uniroma1.it
authors.forename: Maurizio
authors.initials: M
authors.lastname: Speranza
authors.forename: Flaminia
authors.initials: F
authors.lastname: Rondino
authors.forename: Anna
authors.initials: A
authors.lastname: Giardini
authors.forename: Alessandra
authors.initials: A
authors.lastname: Paladini
authors.forename: Ana R
authors.initials: AR
authors.lastname: Hortal
authors.forename: Susanna
authors.initials: S
authors.lastname: Piccirillo
authors.forename: Mauro
authors.initials: M
authors.lastname: Satta