From Wikipedia,
the free encyclopedia.
Internal conversion is
defined as a transition between
one set of
atomic (or molecular)
electronic excited levels to
another set (for example, the
singlet state to a triplet state).
It is sometimes called "radiationless
de-excitation", because no
photons are emitted.
A classic example of this
process is the
quinine sulphate
fluorescence, which can be
quenched by the use of various
halide
salts. What happens is that
the excited molecule can de-excite
by increasing the thermal energy
of the surrounding solvated
ions.
