Abstract: Total quenching (kr+ k,) and chemical reaction rates (k,) for the removal of singlet oxygen by 2 ', 3 ', 5'-tris ((tert-butyldimethylsily1) oxy) guanosine (1) and its oxidation product, 2', 3', 5'-tris ((tert-butyldimethylsilyl) oxy)-7, 8-dihydro-8-oxoguanosine (2), were determined by the time-resolved infrared luminescence technique and competition experiments, respectively. Compound 2 is two orders of magnitude more reactive with ...
