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Article: The solvent effect on the photodeprotection of anthraquinone protected carboxylic acid unravelled by time-resolved spectroscopic studies

TitleThe solvent effect on the photodeprotection of anthraquinone protected carboxylic acid unravelled by time-resolved spectroscopic studies
Authors
KeywordsAromatic compounds
Atoms
Chromophores
Density functional theory
Design for testability
Issue Date2019
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/pccp
Citation
Physical Chemistry Chemical Physics, 2019, v. 21 n. 27, p. 14598-14604 How to Cite?
AbstractTime-resolved spectroscopy studies coupled with the results from density functional theory (DFT) computations were utilized to unravel the photodeprotection reaction mechanism(s) of AQ protected p-methoxybenzoic acid (1) and its influence on the solvent was examined. It has been found that in aprotic organic solvents such as acetonitrile only the triplet state species was seen, whereas a hydrogen atom transfer (HAT) reaction takes place in isopropanol (IPA) to yield the aromatic ketyl radical species for 1. Compound 1 undergoes HAT and a proton transfer process sequentially to accomplish the release of the leaving group in protic organic solvent MeOH and MeOH–H2O solutions and photodeprotection is more favourable in the latter solution due to the stronger proton mediation ability of the water molecules and this system also facilitates the potential application of 1 in biological systems. Although the released acid from photodeprotection reaction can also be seen in another aqueous solvent system of THF–H2O, the by-product of the AQ chromophore undergoes side recombination reaction, which means this the solvent is not preferred for the photodeprotection process. This mechanistic work will help in the future design and development of AQ-PPGs for particular applications.
Persistent Identifierhttp://hdl.handle.net/10722/286177
ISSN
2019 Impact Factor: 3.43
2015 SCImago Journal Rankings: 1.836
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorGuo, Y-
dc.contributor.authorSong, Q-
dc.contributor.authorXu, T-
dc.contributor.authorMa, J-
dc.contributor.authorPhillips, DL-
dc.date.accessioned2020-08-31T07:00:13Z-
dc.date.available2020-08-31T07:00:13Z-
dc.date.issued2019-
dc.identifier.citationPhysical Chemistry Chemical Physics, 2019, v. 21 n. 27, p. 14598-14604-
dc.identifier.issn1463-9076-
dc.identifier.urihttp://hdl.handle.net/10722/286177-
dc.description.abstractTime-resolved spectroscopy studies coupled with the results from density functional theory (DFT) computations were utilized to unravel the photodeprotection reaction mechanism(s) of AQ protected p-methoxybenzoic acid (1) and its influence on the solvent was examined. It has been found that in aprotic organic solvents such as acetonitrile only the triplet state species was seen, whereas a hydrogen atom transfer (HAT) reaction takes place in isopropanol (IPA) to yield the aromatic ketyl radical species for 1. Compound 1 undergoes HAT and a proton transfer process sequentially to accomplish the release of the leaving group in protic organic solvent MeOH and MeOH–H2O solutions and photodeprotection is more favourable in the latter solution due to the stronger proton mediation ability of the water molecules and this system also facilitates the potential application of 1 in biological systems. Although the released acid from photodeprotection reaction can also be seen in another aqueous solvent system of THF–H2O, the by-product of the AQ chromophore undergoes side recombination reaction, which means this the solvent is not preferred for the photodeprotection process. This mechanistic work will help in the future design and development of AQ-PPGs for particular applications.-
dc.languageeng-
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/pccp-
dc.relation.ispartofPhysical Chemistry Chemical Physics-
dc.subjectAromatic compounds-
dc.subjectAtoms-
dc.subjectChromophores-
dc.subjectDensity functional theory-
dc.subjectDesign for testability-
dc.titleThe solvent effect on the photodeprotection of anthraquinone protected carboxylic acid unravelled by time-resolved spectroscopic studies-
dc.typeArticle-
dc.identifier.emailPhillips, DL: phillips@hku.hk-
dc.identifier.authorityPhillips, DL=rp00770-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/C9CP01227C-
dc.identifier.pmid31187831-
dc.identifier.scopuseid_2-s2.0-85068817525-
dc.identifier.hkuros313839-
dc.identifier.volume21-
dc.identifier.issue27-
dc.identifier.spage14598-
dc.identifier.epage14604-
dc.identifier.isiWOS:000477969700013-
dc.publisher.placeUnited Kingdom-
dc.identifier.issnl1463-9076-

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