SOLVENT EFFECT ON THE O-2(B(1)SIGMA(-]O-2(A(1)DELTA(G)) EMISSION-SPECTRUM()(G)))

The effect of solvent on the O-2(b(1) Sigma(g)(+)) - O-2(a(1) Delta(g) ) fluorescence spectrum has been examined. The emission maximum in sol ution is red-shifted relative to the gas-phase value of 1908 nm, and t he extent of the shift increases as the refractive index, n, of the so lvent increases. This observation is consistent with previously publis hed data on the O-2(a(1) Delta(g)) - O-2(X-3 Sigma(g)(-)) transition. Although solvent-dependent changes in the wavelength of the infrared O -2(b(1) Sigma(g)(+)) - O-2(a(1) Delta(g)) emission peak are more prono unced than on the near-infrared O-2(a(1) Delta(g)) - O-2(X-3 Sigma(g)( +)) peak, the effect of-solvent on the respective transition energies is roughly equivalent. Plots of the O-2(b(1) Sigma(g)(+)) - O-2(a(1) D elta(g)) emission maximum against n, or functions of n, indicate that a number of variables likely contribute to the oxygen-solvent interact ion.