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Study of the excited states of nafion incorporated xanthone and benzophenone

1987; Elsevier BV; Volume: 43; Issue: 7 Linguagem: Inglês

10.1016/s0040-4020(01)90274-1

1464-5416

D. Weir, J. C. Scaiano,

Analytical Chemistry and Sensors

The photochemistry of xanthone and of benzophenone has been examined in Nafion membranes in their acid and sodium exchanged forms. Both ketones remain in their neutral form in their ground state, but in acid-Nafion they protonate upon excitation and lead to the typical fluorescence of the protonated form. Similarly, the triplet states protonate in the acid membranes. These membranes offer excellent protection from oxygen quenching.