Picosecond time-resolved fluorescence of the intramolecular excited-state proton transfer in 2-naphthyl-3-hydroxychromones. Torsional relaxation in the excited states

Mukaihata, Hiromi; Ohkubo, Takashi; Fujiwara, Yoshihisa; Itoh, Michiya

doi:10.1016/0009-2614(93)80063-u

Cited by 3 publications

(1 citation statement)

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“…2-NHC is also known to undergo a keto-enol-tautomerism after electronic excitation; the tautomer fluorescence lifetime in 3-methylpentane solution varies from 4.3 to 5.0 ns depending on the temperature, 32 whereas the lifetime of the non-tautomeric form is 8.4 ps. 33 In a supersonic jet the lifetime of the tautomer was determined to be 11-12 ns. 19 The electronic origin was determined with the help of fluorescence excitation spectroscopy to be 27 291 cm À1 19 for 2-NHC.…”

Section: Introductionmentioning

confidence: 99%

IR spectroscopy applied subsequent to a proton transfer reaction in the excited state of isolated 3-hydroxyflavone and 2-(2-naphthyl)-3-hydroxychromone

Bartl

Функ

Schwing

et al. 2009

Phys. Chem. Chem. Phys.

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IR/R2PI-spectroscopy has been applied to the electronic ground and electronically excited states of 3-hydroxyflavone (3-HF) and 2-(2-naphthyl)-3-hydroxychromone (2-NHC) in a supersonic jet yielding direct structural information on the educt and product of a proton transfer reaction. We show that IR spectra of the electronically excited states can be recorded subsequent to a photoinduced chemical reaction, in this case a proton transfer. In combination with DFT and TDDFT calculations structural assignments are performed.

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Section: Introductionmentioning

confidence: 99%