Alcoholic Solvent-Mediated Excited-State Proton Transfer
Dynamics of a Novel Dihydroxynaphthalene Dye
Posted on 2023-09-19 - 03:33
The
excited-state proton transfer (ESPT) reaction is an important
primary photochemical process because it is closely related to photophysical
properties. Although ESPT research in aqueous solutions is predominant,
alcoholic solvent-mediated ESPT studies are also significant in terms
of photoacid–based reactions. Especially, the research for
dihydroxynaphthalenes (DHNs) has been largely neglected due to the
challenging data interpretation of two hydroxyl groups. A novel fluorescent
dye, resveratrone, synthesized by light irradiation of resveratrol,
which is famous for its antioxidant properties, can be regarded as
a type of DHN, and it has distinctive optical properties, including
high quantum yield, a large two-photon absorption coefficient, a large
Stokes shift, and very high biocompatibility. In this study, we investigate
the overall kinetics of the optical properties of resveratrone and
find evidence for alcoholic solvent-mediated ESPT involvement in the
radiative properties of resveratrone with a large Stokes shift. Our
investigation provides an opportunity to revisit the overlooked photophysical
properties of intriguing photoacid behavior and the large Stokes shift
of the dihydroxynaphthalene dye.
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Han, Gi Rim; Lim, Eunhak; Kang, Jooyeon; Hwang, Doyk; Heo, Jiyoung; Kim, Seong Keun; et al. (1753). Alcoholic Solvent-Mediated Excited-State Proton Transfer
Dynamics of a Novel Dihydroxynaphthalene Dye. ACS Publications. Collection. https://doi.org/10.1021/acs.jpca.3c03170