title: TEMPO-Attached Pre-fluorescent Probes Based on Pyridinium Fluorophores.
abstract: The photophysical behavior of three pyridinium-derived fluorophores, the N-aryl-2,4,6-triphenylpyridinium, the N-aryl-5,6-dihydro-2,4-diphenylbenzo[h]quinolinium and the N-aryl-5,6,8,9-tetrahydro-7-phenyldibenzo[c,h]acridinium perchlorates, was investigated. Comparison of their fluorescence quantum yields led to the preparation of a novel, more sensitive pyridinium-based, TEMPO-attached prefluorescent probe for H-abstraction processes, the N-{4-[4-(N-oxyl-2,2,6,6-tetramethylpiperidinyl)carbonylamino]phenyl}-5,6,8,9-tetrahydro-7-phenyldibenzo[c,h]-acridinium perchlorate.
authors.affiliation: Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40 Correo 33, Santiago, de Chile, carolina.aliaga@usach.cl.
authors.forename: Carolina
authors.initials: C
authors.lastname: Aliaga
authors.forename: Freddy
authors.initials: F
authors.lastname: Celis
authors.forename: Susan
authors.initials: S
authors.lastname: Lühr
authors.forename: Rubén
authors.initials: R
authors.lastname: Oñate