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    Magnetic circular dichroism of the mercapto radical in noble-gas matrices

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    12601053_Harrison_JJ final 11.9.06.pdf (153.3Kb)
    Author
    Harrison, J.J.
    Williamson, B.E.
    Date
    2005
    Permanent Link
    http://hdl.handle.net/10092/7047

    Magnetic circular dichroism (MCD) and absorption spectra are reported over the temperature range ~ 1.3–25 K and at magnetic fields up to 5 T for the (0, 0) band of the A2S+ ¬ X2Pi system of the mercapto radical isolated in Ar, Kr and Xe matrices. A simple model is presented in which the temperature and magnetic-field dependences of the MCD are ascribed to population differences between the levels of the X2Pi term that are split by the simultaneous action of spin-orbit and crystal-field effects. This model reproduces the observed positive sign of the MCD B and C terms. However, attempts to extend it to a quantitative interpretation of the data yield poor fits and unrealistic parameters, possibly as a consequence of strong guest-host binding.

    Subjects
    mercapto
     
    magnetic circular dichroism
     
    matrix isolation
     
    crystal fields
     
    spin–orbit coupling
     
    Field of Research::03 - Chemical Sciences::0305 - Organic Chemistry::030505 - Physical Organic Chemistry
     
    Field of Research::03 - Chemical Sciences::0306 - Physical Chemistry (incl. Structural)::030606 - Structural Chemistry and Spectroscopy
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    • Science: Journal Articles [500]
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