Kinetic evidence for excited state proton transfer in salicylamide
β Scribed by P.J. Thistlethwaite; G.J. Woolfe
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 471 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0009-2614
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π SIMILAR VOLUMES
Rate constants for the exawd-slate protolyuc rcactmn of F-nophthylanune In alkalrne aqueous solu~ons have been delemuned usmg nanosecond pulse fluoromeuy. and the excited-slate pK has been derived from the rate cons~~~ls It 1s ancludd whet &naphthylamme follows a two-state reversible proton-uansfcr
## 3aminoacridme (I) has been used to extend the quantitation of acited-state proton-transfer kinetics in concentrated acid media to ==13 hl sulfuric acid. The hydration requirement of tire reaction and the reasons for its not attaining equilibrium witbin the lifetime of the excited state are disc
Fluorimetric titrations of 4-hydroxydiphenyl ether and its anion give stretched sigmoid curves with two inflection points. This reveals that the rates of excited state proton exchange are comparable to the rates of deactivation of the conjugate pair. These curves are analyzed using the lifetimes of
The spectral turnover from molecular to cationic fluoresCence of Z-naphthylamine in sulphuric acid-water mir;tures is accompanied by strong quenching of both components. Within the turnover region deuteration increases the fluorescence quahtum yields considerably. It is concluded that in this system