Fluorescence excitation and dispersed emission spectra of tetrahydroisoquinoline are presented here. Two bands at 36 781 and 36 884 cm−1 are confirmed from the spectral hole burning studies as two origins for two conformers. These bands correspond to the inequivalent twist conformers with the hydrogen atom attached to the nitrogen atom at axial and equatorial positions, respectively. The former is found to be the most stable one. SVL spectra are explained on the basis of two theoretically calculated low-frequency vibrations. These correspond to the butterfly and puckering motions of the benzene chromophore, respectively.

Spectroscopic investigation of tetrahydroisoquinoline in supersonic jet

Conformers of 1,2,3,4 –tetrahydroisoquinoline in S0 and S1: An analysis through potential energy surface, hardness principles and vibrational spectroscopy

Fluorescence excitation spectra, Raman spectra and structure of isochroman in its S1 (π, π∗) state

Conformational landscape, stability, potential energy curves and vibrations of 1,2,3,4 tetrahydroquinoline

Investigation of the structures, potential energy surface, transition states and vibrational frequencies of a vitamin E precursor-chroman in S0 and S1 states: DFT based computational study

Abhijit Chakraborty

Papers

Low-frequency vibrations in S1 states of tetrahydroquinoline and N-deuterotetrahydroquinoline in supersonic jet