Abstract
Abstract Excited state activation energies for cooperative double proton transfer in 1:1 complexes of 7-azaindole (7AI) with different alcohols were determined from quantum yield and lifetime measurements of luminescences from the primarily excited and tautomeric species. The energy barriers of tautomerization are solvent-dependent and correlate with the phenomenological activation energies of the alcohols. Thus, the important factor in the reaction seems to be the twisting motion of 7AI and alcohol molecules, leading to a planar conformation of all atoms participating in proton transfer.
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