Abstract
In the present investigation we have examined fluorescence excitation spectra and fluorescence decay profiles for various vibronic bands in the X → A transitions of thiophosgene (Cl2CS) under 10 mTorr in magnetic fields of up to 10 T. These experimental results indicated that the observed magnetic quenching (MQ) of the fluorescence can no longer be explained by the ordinary theory of the direct mechanism (DM). In order to interpret such experimental results in larger magnetic fields than 1.2 T, we have applied a new theory that was developed by solving the equation of motion for the density matrix. According to this theory, MQ due to DM is saturated in sufficiently large fields. This theoretical prediction is in agreement with the experimental results for the 44 1, 41 0, 31 041 0, 43 0, and 11 041 0 bands. Thus, we may conclude that the saturation of MQ due to DM is a new phenomenon characteristic of MQ in magnetic fields larger than 1.2 T. Moreover, we have examined the pressure dependence of MQ of the fluorescence in several vibronic bands. These experimental results show that MQ of the fluorescence under 10 mTorr is due mainly to the acceleration of intramolecular radiationless processes induced by magnetic fields.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
