title: Mechanistic study of the photochemical hydroxide ion release from 9-hydroxy-10-methyl-9-phenyl-9,10-dihydroacridine.
abstract: The excited-state behavior of 9-hydroxy-10-methyl-9-phenyl-9,10-dihydroacridine and its derivative, 9-methoxy-10-methyl-9-phenyl-9,10-dihydroacridine (AcrOR, R = H, Me), was studied via femtosecond and nanosecond UV-vis transient absorption spectroscopy. The solvent effects on C-O bond cleavage were clearly identified: a fast heterolytic cleavage (τ = 108 ps) was observed in protic solvents, while intersystem crossing was observed in aprotic solvents. Fast heterolysis generates 10-methyl-9-phenylacridinium (Acr(+)) and (-)OH, which have a long recombination lifetime (no signal decay was observed within 100 μs). AcrOH exhibits the characteristic behavior needed for its utilization as a chromophore in the pOH jump experiment.
authors: Department of Chemistry, Bowling Green State University, Bowling Green, Ohio 43403, USA.
authors: Dapeng
authors: D
authors: Zhou
authors: Renat
authors: R
authors: Khatmullin
authors: Janitha
authors: J
authors: Walpita
authors: Nicholas A
authors: NA
authors: Miller
authors: Hoi Ling
authors: HL
authors: Luk
authors: Shubham
authors: S
authors: Vyas
authors: Christopher M
authors: CM
authors: Hadad
authors: Ksenija D
authors: KD
authors: Glusac