Issue 40, 2010

Rotationally resolved high-resolution spectrum of the S1–S0 transition of jet-cooled thioanisole

Abstract

The rotationally resolved high-resolution fluorescence excitation spectrum of the 0–0 band in the S1 ← S0 electronic excitation of thioanisole was observed using the techniques of a collimated supersonic jet and a single-mode ultraviolet laser for the first time. High accurate rotational constants for the S0 and the S1 states have been determined by precisely calibrated transition energies of about 1000 assigned rotational lines. The molecular structure of thioanisole has been estimated by high-level MO calculations. The planarity of thioanisole in the S0 and the S1 states was also demonstrated clearly. The lifetime of the S1 state was estimated to be 2.0 ns from the observed line width. This line shape did not change with the magnetic field of 1 Tesla, suggesting that the main radiationless process should be internal conversion to the S0 state.

Graphical abstract: Rotationally resolved high-resolution spectrum of the S1–S0 transition of jet-cooled thioanisole

Article information

Article type
Paper
Submitted
18 Mar 2010
Accepted
30 Jul 2010
First published
02 Sep 2010

Phys. Chem. Chem. Phys., 2010,12, 13243-13247

Rotationally resolved high-resolution spectrum of the S1–S0 transition of jet-cooled thioanisole

M. Hoshino-Nagasaka, T. Suzuki, T. Ichimura, S. Kasahara, M. Baba and S. Kawauchi, Phys. Chem. Chem. Phys., 2010, 12, 13243 DOI: 10.1039/C004454G

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