Quantum yield solution

For comparison, the solution quantum yield was determined by the merocyanine dye technique. Acetonitrile solutions of triphenylsulfonium hexafluoroantimonate were irradiated with a 5 m. /cm2 dose. Dye solution was added and the acid content was determined by changes in dye absorption. The quantum yield for acid production was determined to be 0.8, which agrees reasonably well with the value (0.71) determined for the hexafluoroarsenate salt (8). 

In benzene solution, quantum yields for formation of olefin triplets from 2537 A irradiation are only 0.20.235 There is some doubt whether triplet benzene is the actual energy donor in solution, since the quantum yield for sensitized phosphorescence of biacetyl depends on a greater than first order of benzene concentration.238 Dubois has suggested that an excited dimer is responsible for energy transfer.236... 

For example, in the system shown in Figure 16 with EDTA or NADH as electron donor trapped in the inner pools, [ZnTPP] in the bilayer and in the bulk solution, quantum yields for... 

The tris(diimine)Ru(II) complexes are inert to photosubstitution in RT aqueous solutions however at higher T, [RufbipyljP undergoes measurable photoaquation in strongly acidic solutions . Quantum yields for this are small (2 X 10 in 1 M aq HCl... 

In general, strongly emitting molecules contain extensive conjugated 8 -systems and emission in the NIR can be achieved from the condensation products from aromatic aldehydes and active methylenes [40]. However, relatively small fluorophores may give useful results. Thus, bis(alkenyl)-dipiperidino benzenes have been found to emit visible light in solution (quantum yield 0.09-0.66) and, more strongly, in the solid state (0.43-0.98) as a thin film or incorporated in a polystyrene films (0.43-1.00, Scheme 9.15) [41]. 

Sun, YR and Bunker, C.E., Fluorescence of (5,6)-fullerene-C7o in room-temperature solutions — quantum yields and well-resolved spectra as a function of excitation wavelength, /. Phys. Chem., 97, 6770, 1993. 

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