Fluorescence spectroscopy of jet-cooled chiral (+/-)-indan-1-ol and its cluster with (+/-)-methyl- and ethyl-lactate.
The laser-induced fluorescence excitation, dispersed fluorescence, and IR-UV double resonance spectra of chiral (+/-)-indan-1-ol have been measured in a supersonic expansion. Three low energy conformers of the molecule have been identified, and the ground state vibrational modes of each conformer are tentatively assigned with the aid of quantum chemistry calculations. The frequencies of the nu(OH) and nu(CH) stretch modes of the two most abundant conformers have been measured by fluorescence dip IR spectroscopy and have been used for their assignment. The dispersed fluorescence spectra clearly indicate the coupling of low-frequency modes, as was seen in other substituted indanes such as 1-aminoindan and 1-amino-2-indanol. (R)- and (S)-indan-1-ol distinctly form different types of clusters with (R)- and (S)- methyl- and ethyl-lactate. Both hetero- and homochiral clusters are characterized by complex spectra which exhibit a progression built on low-frequency intermolecular modes.
Le Barbu-Debus
Katia
K
Laboratoire de Photophysique Moléculaire du CNRS, Univ Paris-Sud, F-91405 Orsay, France. katia.lebarbu@ppm.u-psud.fr
Lahmani
Francoise
F
Zehnacker-Rentien
Anne
A
Guchhait
Nikhil
N
Panja
Sujit S
SS
Chakraborty
Tapas
T