Ari Gafni and his group at the Univ. of Michigan has done a considerable amount of work on this in the past (1990s). You might want to find papers published by his group on CPL. Also papers by Izchak Steinberg and Ari Gafni from the 1970s.

Gianfranco,

In a review on CPL:

Frederick Richardson and James Riehl

Circularly Polarized Luminescence Spectroscopy

Chemical Reviews, Vol. 77, No. 6, pp 773-791

Mentions work done by Shindo and Miura. They used optically active sodium 1,3,5-triphenyl-pyrazolinyl sulfate in methanol at room temperature. The g(lum) factor was found to be constant (~ 4 x 10^-4) across the 390-560 nm emission band.

Unfortunately I lost the last page of my copy of the review that contains the direct reference to Shindo's and Miura's work.

Hopefully that is helpful.

Cheers,

John