Chiral clusters in a supersonic beam: R2PI-TOF spectroscopy of diastereomeric carboxylic esters/(R)-(+)-1-phenyl-1-propanol complexes.
Wavelength and mass resolved resonance-enhanced two photon ionization (R2PI) excitation spectra of (R)-(+)-1-phenyl-1-propanol (P(R)) and its complexes with some chiral esters, i.e. methyl lactates (L(R) and L(S)), methyl 3-hydroxybutyrates (H(R) and H(S)), and methyl 2-chloropropionates (C(R) and C(S)), have been recorded after a supersonic molecular beam expansion and interpreted in the light of DFT calculations. The spectral features of the selected complexes were found to depend on the nature of hydrogen-bond interactions within the diasteromeric complexes, whose intensity in turn depends upon the structure and the configuration of the estereal moiety. The study further confirms resonant two-photon ionization spectroscopy, coupled with time-of-flight mass resolution (R2PI-TOF), as an excellent tool for gathering valuable information on the interactive forces in molecular clusters and for the enantiodiscrimination of chiral molecules in the gas phase.
Giardini Guidoni
A
A
Dipartimento di Chimica, Università di Roma La Sapienza, Italy.
Paladini
A
A
Rondino
F
F
Piccirillo
S
S
Satta
M
M
Speranza
M
M
D004952:Esters / Q000737:chemistry*; D006860:Hydrogen Bonding; D013058:Mass Spectrometry / Q000379:methods*; D020005:Propanols / Q000737:chemistry*; D013237:Stereoisomerism
D004952:Esters; D020005:Propanols; C439395:1-phenylpropanol