Journal
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
Volume 2, Issue 4, Pages 402-406Publisher
SPRINGERNATURE
DOI: 10.1039/b211834n
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trans-1-(1'-Hydroxy-2'-naphthyl)-3-(1-naphthyl)-2-propen-1-one (trans-NHC) exhibited a fluorescence spectrum (lambda(max) = 650 nm) with a large Stokes shift (10,500 cm(-1)) in benzene at room temperature, indicating that intramolecular hydrogen atom transfer took place in the singlet excited state. On laser flash photolysis, the T-T absorption spectrum (lambda(max) = 660 nm) assigned to the tautomer and the ground state transient spectrum (lambda(max) = 480 nm) assigned to the ground state trans-keto form were observed. The former spectrum indicates that adiabatic intramolecular hydrogen atom transfer also took place in the excited triplet state.
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