Long-Lived Photoacid Based upon a Photochromic Reaction
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- 8 August 2011
- journal article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 133 (37), 14699-14703
- https://doi.org/10.1021/ja203851c
Abstract
A visible-light activatable photoacid has been studied, which upon irradiation, changes from a weak acid, with a pKa of 7.8, to a strong acid, which achieves nearly complete proton dissociation. This process is reversible and the half-life of the proton-dissociation state is ∼70s. The long lifetime of the proton-dissociation state is due to a sequential intramolecular photochromic reaction. Using this photoacid, a pH change of 2.2 units has been achieved. In addition, we demonstrated that the photoinduced proton concentration can catalyze an esterification reaction, and greatly alter the volume of a pH-sensitive polymer. This work shows that acid-catalyzed and pH-sensitive processes can be photochemically controlled by using this type of photoacid.Keywords
This publication has 25 references indexed in Scilit:
- Photoinduced pH drops in waterPhysical Chemistry Chemical Physics, 2011
- Photochemical control of dielectric properties based on intermolecular proton transfer in a hydrogen-bonded diarylethene crystalChemical Communications, 2011
- Dynamics and mechanism of repair of ultraviolet-induced (6–4) photoproduct by photolyaseNature, 2010
- Recent Experimental Advances on Excited-State Intramolecular Proton Coupled Electron Transfer ReactionAccounts of Chemical Research, 2010
- Reversible photochromic switch ensemble and its photoimaging using H+ transfer between spiropyran and fluorescein in a polymer matrixChemical Communications, 2009
- Photoacid for Extremely Long-Lived and Reversible pH-JumpsJournal of the American Chemical Society, 2009
- A Simple Molecular Machine Operated by Photoinduced Proton TransferJournal of the American Chemical Society, 2007
- Excited-State Proton Transfer: From Constrained Systems to “Super” Photoacids to Superfast Proton TransferAccounts of Chemical Research, 2001
- Excited-state proton transfer reactions I. Fundamentals and intermolecular reactionsJournal of Photochemistry and Photobiology A: Chemistry, 1993
- Photoisomerization of indolinespirobenzopyran in layered double hydroxidesJournal of Materials Chemistry, 1993