Singlet oxygen quenching by riboflavin

Insińska-Rak, Małgorzata; Henke, Petr; Breitenbach, Thomas; Ogilby, Peter R.

doi:10.1016/j.jphotochem.2023.115108

Cited by 1 publication

(1 citation statement)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is indeed known that many amino acids can react with and/or deactivate O 2 (a 1 Δ g ), 506,564,565 and that FMN itself can deactivate O 2 (a 1 Δ g ), albeit poorly. 566 However, it has since been established that, in miniSOG and its subsequent mutants, quenching by the protein as O 2 (a 1 Δ g ) diffuses out into the surrounding solvent does not adversely affect the measured O 2 (a 1 Δ g ) quantum yield. 284,490 Indeed, the data indicate that a large fraction of the O 2 (a 1 Δ g ) produced by the protein-encased FMN escapes into the surrounding solvent, a result that is consistent with observations from other protein encased sensitizers 559 and from sensitizers encased in polymeric nanoparticles.…”

Section: Sensitizers Dissolved In Homogeneous Systemsmentioning

confidence: 99%

Singlet Oxygen Photophysics: From Liquid Solvents to Mammalian Cells

Bregnhøj,

Thorning,

Ogilby

2024

Chem. Rev.

View full text Add to dashboard Cite

Molecular oxygen, O2, has long provided a cornerstone for studies in chemistry, physics, and biology. Although the triplet ground state, O2(X3Σg –), has garnered much attention, the lowest excited electronic state, O2(a1Δg), commonly called singlet oxygen, has attracted appreciable interest, principally because of its unique chemical reactivity in systems ranging from the Earth’s atmosphere to biological cells. Because O2(a1Δg) can be produced and deactivated in processes that involve light, the photophysics of O2(a1Δg) are equally important. Moreover, pathways for O2(a1Δg) deactivation that regenerate O2(X3Σg –), which address fundamental principles unto themselves, kinetically compete with the chemical reactions of O2(a1Δg) and, thus, have practical significance. Due to technological advances (e.g., lasers, optical detectors, microscopes), data acquired in the past ∼20 years have increased our understanding of O2(a1Δg) photophysics appreciably and facilitated both spatial and temporal control over the behavior of O2(a1Δg). One goal of this Review is to summarize recent developments that have broad ramifications, focusing on systems in which oxygen forms a contact complex with an organic molecule M (e.g., a liquid solvent). An important concept is the role played by the M+•O2 –• charge-transfer state in both the formation and deactivation of O2(a1Δg).

show abstract