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(a–d) PhotolysisON—photolysisOFF ESI mass spectra of a mildly alkaline solution of aqueous RF after irradiation at 365 nm (3.4 eV) at 3, 6, 9, and 12 min, respectively. [*] indicates the photodepleted ions at m/z 255, 375, 471, and 751, where m/z 375 is that of the parent ion.
