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Bregnhøj M, Thorning F, Ogilby PR. Singlet Oxygen Photophysics: From Liquid Solvents to Mammalian Cells. Chem Rev 2024; 124:9949-10051. [PMID: 39106038 DOI: 10.1021/acs.chemrev.4c00105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/07/2024]
Abstract
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).
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Affiliation(s)
- Mikkel Bregnhøj
- Department of Chemistry, Aarhus University, 140 Langelandsgade, Aarhus 8000, Denmark
| | - Frederik Thorning
- Department of Chemistry, Aarhus University, 140 Langelandsgade, Aarhus 8000, Denmark
| | - Peter R Ogilby
- Department of Chemistry, Aarhus University, 140 Langelandsgade, Aarhus 8000, Denmark
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2
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Ishchenko AA, Syniugina AT. Structure and Photosensitaizer Ability of Polymethine Dyes in Photodynamic Therapy: A Review. THEOR EXP CHEM+ 2023. [DOI: 10.1007/s11237-023-09754-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
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3
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Pavlova MA, Panchenko PA, Alekhina EA, Ignatova AA, Plyutinskaya AD, Pankratov AA, Pritmov DA, Grin MA, Feofanov AV, Fedorova OA. A New Glutathione-Cleavable Theranostic for Photodynamic Therapy Based on Bacteriochlorin e and Styrylnaphthalimide Derivatives. BIOSENSORS 2022; 12:1149. [PMID: 36551116 PMCID: PMC9775103 DOI: 10.3390/bios12121149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 12/02/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Herein, we report a new conjugate BChl-S-S-NI based on the second-generation photosensitizer bacteriochlorin e6 (BChl) and a 4-styrylnaphthalimide fluorophore (NI), which is cleaved into individual functional fragments in the intracellular medium. The chromophores in the conjugate were cross-linked by click chemistry via a bis(azidoethyl)disulfide bridge which is reductively cleaved by the intracellular enzyme glutathione (GSH). A photophysical investigation of the conjugate in solution by using optical spectroscopy revealed that the energy transfer process is realized with high efficiency in the conjugated system, leading to the quenching of the emission of the fluorophore fragment. It was shown that the conjugate is cleaved by GSH in solution, which eliminates the possibility of energy transfer and restores the fluorescence of 4-styrylnaphthalimide. The photoinduced activity of the conjugate and its imaging properties were investigated on the mouse soft tissue sarcoma cell line S37. Phototoxicity studies in vitro show that the BChl-S-S-NI conjugate has insignificant dark cytotoxicity in the concentration range from 15 to 20,000 nM. At the same time, upon photoexcitation, it exhibits high photoinduced activity.
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Affiliation(s)
- Marina A. Pavlova
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 119991 Moscow, Russia
| | - Pavel A. Panchenko
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 119991 Moscow, Russia
- Faculty of Petroleum Chemistry and Polymeric Materials, D. Mendeleev University of Chemical Technology of Russia, 125047 Moscow, Russia
| | - Ekaterina A. Alekhina
- Faculty of Petroleum Chemistry and Polymeric Materials, D. Mendeleev University of Chemical Technology of Russia, 125047 Moscow, Russia
| | - Anastasia A. Ignatova
- M.M. Shemyakin and Yu.A. Ovchinnikov Institute of Bioorganic Chemistry of Russian Academy of Sciences, 117997 Moscow, Russia
| | - Anna D. Plyutinskaya
- P. Hertsen Moscow Oncology Research Institute—Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, 125284 Moscow, Russia
| | - Andrey A. Pankratov
- P. Hertsen Moscow Oncology Research Institute—Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, 125284 Moscow, Russia
| | - Dmitriy A. Pritmov
- Institute of Fine Chemical Technology, MIREA—Russian Technological University, 119571 Moscow, Russia
| | - Mikhail A. Grin
- Institute of Fine Chemical Technology, MIREA—Russian Technological University, 119571 Moscow, Russia
| | - Alexey V. Feofanov
- M.M. Shemyakin and Yu.A. Ovchinnikov Institute of Bioorganic Chemistry of Russian Academy of Sciences, 117997 Moscow, Russia
| | - Olga A. Fedorova
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 119991 Moscow, Russia
- Faculty of Petroleum Chemistry and Polymeric Materials, D. Mendeleev University of Chemical Technology of Russia, 125047 Moscow, Russia
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Olaizola AM, Kuis R, Johnson A, Kingsley D. Stimulated Raman generation of aqueous singlet oxygen without photosensitizers. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2022; 235:112562. [PMID: 36095974 DOI: 10.1016/j.jphotobiol.2022.112562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 08/23/2022] [Accepted: 09/01/2022] [Indexed: 06/15/2023]
Abstract
Singlet oxygen is traditionally produced via photosensitizer molecules such as methylene blue, which function as catalysts. Here we investigate stimulated Raman generation of singlet oxygen from dissolved oxygen in both water (H2O) and heavy water (D2O) using nanosecond-pulsed visible blue laser light in the 400-440 nm spectral region without singlet oxygen photosensitizers. We report an oxygen-dependent Stokes peak in the red spectrum (600-670 nm) that is identical when produced in H2O and D2O. These red Stokes photons are not detected when an oxygen quencher is present. Temporal photodepletion of the uric acid absorbance peak at 294 nm is consistent with singlet oxygen generation. We postulate that a two-photon stimulated Raman process produces singlet oxygen from O2 dissolved within the solvents. We note that the energy difference between input and output photons of 0.97 eV is precisely the energy needed to excite O2 to its singlet state.
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Affiliation(s)
- Aristides Marcano Olaizola
- Division of Physics, Engineering, Mathematics, and Computer Science, Delaware State University, 1200 North DuPont Highway, Dover, DE 19901, USA.
| | - Robinson Kuis
- Center for Advanced Studies in Photonics Research, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, United States of America
| | - Anthony Johnson
- Center for Advanced Studies in Photonics Research, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, United States of America
| | - David Kingsley
- Residue Chemistry and Predictive Microbiology Research Unit, US Dept. of Agriculture, Agriculture Research Service, Delaware State University, 1200 North DuPont Highway, Dover, DE 19901, United States of America
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Klimenko A, Rodina EE, Silachev D, Begun M, Babenko VA, Benditkis AS, Kozlov AS, Krasnovsky AA, Khotimchenko YS, Katanaev VL. Chlorin Endogenous to the North Pacific Brittle Star Ophiura sarsii for Photodynamic Therapy Applications in Breast Cancer and Glioblastoma Models. Biomedicines 2022; 10:biomedicines10010134. [PMID: 35052813 PMCID: PMC8773836 DOI: 10.3390/biomedicines10010134] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/03/2022] [Accepted: 01/05/2022] [Indexed: 02/06/2023] Open
Abstract
Photodynamic therapy (PDT) represents a powerful avenue for anticancer treatment. PDT relies on the use of photosensitizers—compounds accumulating in the tumor and converted from benign to cytotoxic upon targeted photoactivation. We here describe (3S,4S)-14-Ethyl-9-(hydroxymethyl)-4,8,13,18-tetramethyl-20-oxo-3-phorbinepropanoic acid (ETPA) as a major metabolite of the North Pacific brittle stars Ophiura sarsii. As a chlorin, ETPA efficiently produces singlet oxygen upon red-light photoactivation and exerts powerful sub-micromolar phototoxicity against a panel of cancer cell lines in vitro. In a mouse model of glioblastoma, intravenous ETPA injection combined with targeted red laser irradiation induced strong necrotic ablation of the brain tumor. Along with the straightforward ETPA purification protocol and abundance of O. sarsii, these studies pave the way for the development of ETPA as a novel natural product-based photodynamic therapeutic.
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Affiliation(s)
- Antonina Klimenko
- Institute of Life Sciences and Biomedicine, Far Eastern Federal University, 690922 Vladivostok, Russia; (A.K.); (E.E.R.); (M.B.); (Y.S.K.)
| | - Elvira E. Rodina
- Institute of Life Sciences and Biomedicine, Far Eastern Federal University, 690922 Vladivostok, Russia; (A.K.); (E.E.R.); (M.B.); (Y.S.K.)
| | - Denis Silachev
- A.N. Belozersky Research Institute of Physico-Chemical Biology, Moscow State University, 119899 Moscow, Russia; (D.S.); (V.A.B.)
| | - Maria Begun
- Institute of Life Sciences and Biomedicine, Far Eastern Federal University, 690922 Vladivostok, Russia; (A.K.); (E.E.R.); (M.B.); (Y.S.K.)
| | - Valentina A. Babenko
- A.N. Belozersky Research Institute of Physico-Chemical Biology, Moscow State University, 119899 Moscow, Russia; (D.S.); (V.A.B.)
| | - Anton S. Benditkis
- Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (A.S.B.); (A.S.K.); (A.A.K.)
| | - Anton S. Kozlov
- Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (A.S.B.); (A.S.K.); (A.A.K.)
| | - Alexander A. Krasnovsky
- Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (A.S.B.); (A.S.K.); (A.A.K.)
| | - Yuri S. Khotimchenko
- Institute of Life Sciences and Biomedicine, Far Eastern Federal University, 690922 Vladivostok, Russia; (A.K.); (E.E.R.); (M.B.); (Y.S.K.)
| | - Vladimir L. Katanaev
- Institute of Life Sciences and Biomedicine, Far Eastern Federal University, 690922 Vladivostok, Russia; (A.K.); (E.E.R.); (M.B.); (Y.S.K.)
- Translational Research Center in Oncohaematology, Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland
- Correspondence:
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Burtsev I, Platonova Y, Volov A, Tomilova L. Synthesis, characterization and photochemical properties of novel octakis(p–fluorophenoxy)substituted phthalocyanine and its gallium and indium complexes. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114697] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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7
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Zakharko MA, Panchenko PA, Zarezin DP, Nenajdenko VG, Pritmov DA, Grin MA, Mironov AF, Fedorova OA. Conjugates of 3,4-dimethoxy-4-styrylnaphthalimide and bacteriochlorin for theranostics in photodynamic therapy. Russ Chem Bull 2020. [DOI: 10.1007/s11172-020-2885-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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8
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Effect of linker length on the spectroscopic properties of bacteriochlorin – 1,8-naphthalimide conjugates for fluorescence-guided photodynamic therapy. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112338] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Blázquez-Castro A. Optical Tweezers: Phototoxicity and Thermal Stress in Cells and Biomolecules. MICROMACHINES 2019; 10:E507. [PMID: 31370251 PMCID: PMC6722566 DOI: 10.3390/mi10080507] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 07/29/2019] [Accepted: 07/30/2019] [Indexed: 12/12/2022]
Abstract
For several decades optical tweezers have proven to be an invaluable tool in the study and analysis of myriad biological responses and applications. However, as with every tool, they can have undesirable or damaging effects upon the very sample they are helping to study. In this review the main negative effects of optical tweezers upon biostructures and living systems will be presented. There are three main areas on which the review will focus: linear optical excitation within the tweezers, non-linear photonic effects, and thermal load upon the sampled volume. Additional information is provided on negative mechanical effects of optical traps on biological structures. Strategies to avoid or, at least, minimize these negative effects will be introduced. Finally, all these effects, undesirable for the most, can have positive applications under the right conditions. Some hints in this direction will also be discussed.
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Affiliation(s)
- Alfonso Blázquez-Castro
- Department of Physics of Materials, Faculty of Sciences, Autonomous University of Madrid, 28049 Madrid, Spain.
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10
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Panchenko PA, Grin MA, Fedorova OA, Zakharko MA, Pritmov DA, Mironov AF, Arkhipova AN, Fedorov YV, Jonusauskas G, Yakubovskaya RI, Morozova NB, Ignatova AA, Feofanov AV. A novel bacteriochlorin-styrylnaphthalimide conjugate for simultaneous photodynamic therapy and fluorescence imaging. Phys Chem Chem Phys 2018; 19:30195-30206. [PMID: 29105711 DOI: 10.1039/c7cp04449f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Propargyl-152,173-dimethoxy-131-amide of bacteriochlorin e (BChl) and a 4-(4-N,N-dimethylaminostyryl)-N-alkyl-1,8-naphthalimide bearing azide group in the N-alkyl fragment were conjugated by the copper(i)-catalyzed 1,3-dipolar cycloaddition to produce a novel dyad compound BChl-NI for anticancer photodynamic therapy (PDT) combining the modalities of a photosensitizer (PS) and a fluorescence imaging agent. A precise photophysical investigation of the conjugate in solution using steady-state and time-resolved optical spectroscopy revealed that the presence of the naphthalimide (NI) fragment does not decrease the photosensitizing ability of the bacteriochlorin (BChl) core as compared with BChl; however, the fluorescence of naphthalimide is completely quenched due to resonance energy transfer (RET) to BChl. It has been shown that the BChl-NI conjugate penetrates into human lung adenocarcinoma A549 cells, and accumulates in the cytoplasm where it has a mixed granular-diffuse distribution. Both NI and BChl fluorescence in vitro provides registration of bright images showing perfectly intracellular distribution of BChl-NI. The ability of NI to emit light upon excitation in imaging experiments has been found to be due to hampering of RET as a result of photodestruction of the energy acceptor BChl unit. Phototoxicity studies have shown that the BChl-NI conjugate is not toxic for A549 cells at tested concentrations (<8 μM) without light-induced activation. At the same time, the concentration-dependent killing of cells is observed upon the excitation of the bacteriochlorin moiety with red light that occurs due to reactive oxygen species formation. The presented data demonstrate that the BChl-NI conjugate is a promissing dual function agent for cancer diagnostics and therapy.
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Affiliation(s)
- Pavel A Panchenko
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 119991, Vavilova str. 28, Moscow, Russia.
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11
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Blázquez-Castro A. Direct 1O 2 optical excitation: A tool for redox biology. Redox Biol 2017; 13:39-59. [PMID: 28570948 PMCID: PMC5451181 DOI: 10.1016/j.redox.2017.05.011] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 04/30/2017] [Accepted: 05/20/2017] [Indexed: 12/28/2022] Open
Abstract
Molecular oxygen (O2) displays very interesting properties. Its first excited state, commonly known as singlet oxygen (1O2), is one of the so-called Reactive Oxygen Species (ROS). It has been implicated in many redox processes in biological systems. For many decades its role has been that of a deleterious chemical species, although very positive clinical applications in the Photodynamic Therapy of cancer (PDT) have been reported. More recently, many ROS, and also 1O2, are in the spotlight because of their role in physiological signaling, like cell proliferation or tissue regeneration. However, there are methodological shortcomings to properly assess the role of 1O2 in redox biology with classical generation procedures. In this review the direct optical excitation of O2 to produce 1O2 will be introduced, in order to present its main advantages and drawbacks for biological studies. This photonic approach can provide with many interesting possibilities to understand and put to use ROS in redox signaling and in the biomedical field.
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Affiliation(s)
- Alfonso Blázquez-Castro
- Department of Physics of Materials, Faculty of Sciences, Autonomous University of Madrid, Madrid, Spain; Formerly at Aarhus Institute of Advanced Studies (AIAS)/Department of Chemistry, Aarhus University, Aarhus, Denmark.
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12
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Minaev B. Photochemistry and Spectroscopy of Singlet Oxygen in Solvents. Recent Advances which Support the Old Theory. CHEMISTRY & CHEMICAL TECHNOLOGY 2016. [DOI: 10.23939/chcht10.04si.519] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Molecular oxygen is a paramagnetic gas with the triplet O2( ) ground state which exhibits just sluggish chemical reactivity in the absence of radical sources. In contrast, the excited metastable singlet oxygen O2( ) is highly reactive; it can oxygenate organic molecules in a wide range of specific reactions which differ from those of the usual triplet oxygen of the air. This makes the singlet oxygen an attractive reagent for new synthesis and even for medical treatments in photodynamic therapy. As an important intermediate O2( ) has attracted great attention of chemists during half-century studies of its reactivity and spectroscopy, but unusual properties of singlet oxygen makes it difficult to unravel all mysterious features. The semiempirical theory of spin-orbit coupling in dioxygen and in collision complexes of O2 with diamagnetic molecules proposed in 1982 year has explained and predicted many photochemical and spectral properties of dioxygen produced by the dye sensitization in solvents. Recent experiments with direct laser excitation of O2 in solvents provide a complete support of the old theory. The present review scrutinizes the whole story of development and experimental verification of this theory.
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Bregnhøj M, Krægpøth MV, Sørensen RJ, Westberg M, Ogilby PR. Solvent and Heavy-Atom Effects on the O 2(X 3Σ g-) → O 2(b 1Σ g+) Absorption Transition. J Phys Chem A 2016; 120:8285-8296. [PMID: 27689752 DOI: 10.1021/acs.jpca.6b08035] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The effect of 16 liquid solvents on both the spectrum and molar absorption coefficient of the X3Σg- → b1Σg+ transition in molecular oxygen has been examined. The ability to monitor this weak transition using air or oxygen saturated samples at atmospheric pressure was facilitated by the rapid and efficient O2(b1Σg+) → O2(a1Δg) transition, which allowed the use of O2(a1Δg) phosphorescence as a sensitive probe of O2(b1Σg+) production. The results of these O2(a1Δg) phosphorescence experiments are consistent with the results of independent experiments in which the O2(a1Δg) thus produced was "trapped" via a chemical reaction. The data recorded were used to calculate rate constants for the O2(b1Σg+) → O2(X3Σg-) radiative transition, a parameter that is otherwise difficult to directly obtain from such a wide range of solvents using O2(b1Σg+) → O2(X3Σg-) phosphorescence. The data show that the response of the O2(b1Σg+) → O2(X3Σg-) radiative transition to solvent is not the same as that of the O2(b1Σg+) → O2(a1Δg) and O2(a1Δg) → O2(X3Σg-) radiative transitions, both of which have been extensively examined over the years. However, our data are consistent with a theoretical model proposed by Minaev for the effect of solvent on radiative transitions in oxygen and, as such, arguably provide one of the final chapters in describing a system that has challenged the scientific community for years.
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Affiliation(s)
- Mikkel Bregnhøj
- Department of Chemistry, Aarhus University , DK-8000 Aarhus, Denmark
| | - Mikkel V Krægpøth
- Department of Chemistry, Aarhus University , DK-8000 Aarhus, Denmark
| | | | - Michael Westberg
- Department of Chemistry, Aarhus University , DK-8000 Aarhus, Denmark
| | - Peter R Ogilby
- Department of Chemistry, Aarhus University , DK-8000 Aarhus, Denmark
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Westberg M, Bregnhøj M, Banerjee C, Blázquez-Castro A, Breitenbach T, Ogilby PR. Exerting better control and specificity with singlet oxygen experiments in live mammalian cells. Methods 2016; 109:81-91. [DOI: 10.1016/j.ymeth.2016.07.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 07/01/2016] [Accepted: 07/03/2016] [Indexed: 12/25/2022] Open
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Krasnovsky AA, Kozlov AS. Photonics of dissolved oxygen molecules. Comparison of the rates of direct and photosensitized excitation of oxygen and reevaluation of the oxygen absorption coefficients. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.06.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Westberg M, Bregnhøj M, Blázquez-Castro A, Breitenbach T, Etzerodt M, Ogilby PR. Control of singlet oxygen production in experiments performed on single mammalian cells. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.01.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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18
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Liu F, Lu W, Yin X, Liu J. Mechanistic and Kinetic Study of Singlet O2 Oxidation of Methionine by On-Line Electrospray Ionization Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2016; 27:59-72. [PMID: 26306590 DOI: 10.1007/s13361-015-1237-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 07/24/2015] [Indexed: 06/04/2023]
Abstract
We report a reaction apparatus developed to monitor singlet oxygen ((1)O2) reactions in solution using on-line ESI mass spectrometry and spectroscopy measurements. (1)O2 was generated in the gas phase by the reaction of H2O2 with Cl2, detected by its emission at 1270 nm, and bubbled into aqueous solution continuously. (1)O2 concentrations in solution were linearly related to the emission intensities of airborne (1)O2, and their absolute scales were established based on a calibration using 9,10-anthracene dipropionate dianion as an (1)O2 trapping agent. Products from (1)O2 oxidation were monitored by UV-Vis absorption and positive/negative ESI mass spectra, and product structures were elucidated using collision-induced dissociation-tandem mass spectrometry. To suppress electrical discharge in negative ESI of aqueous solution, methanol was added to electrospray via in-spray solution mixing using theta-glass ESI emitters. Capitalizing on this apparatus, the reaction of (1)O2 with methionine was investigated. We have identified methionine oxidation intermediates and products at different pH, and measured reaction rate constants. (1)O2 oxidation of methionine is mediated by persulfoxide in both acidic and basic solutions. Persulfoxide continues to react with another methionine, yielding methionine sulfoxide as end-product albeit with a much lower reaction rate in basic solution. Density functional theory was used to explore reaction potential energy surfaces and establish kinetic models, with solvation effects simulated using the polarized continuum model. Combined with our previous study of gas-phase methionine ions with (1)O2, evolution of methionine oxidation pathways at different ionization states and in different media is described.
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Affiliation(s)
- Fangwei Liu
- Department of Chemistry and Biochemistry, Queens College and the Graduate Center of the City University of New York, Queens, NY, 11367, USA
| | - Wenchao Lu
- Department of Chemistry and Biochemistry, Queens College and the Graduate Center of the City University of New York, Queens, NY, 11367, USA
| | - Xunlong Yin
- Department of Chemistry and Biochemistry, Queens College and the Graduate Center of the City University of New York, Queens, NY, 11367, USA
| | - Jianbo Liu
- Department of Chemistry and Biochemistry, Queens College and the Graduate Center of the City University of New York, Queens, NY, 11367, USA.
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Bregnhøj M, Blázquez-Castro A, Westberg M, Breitenbach T, Ogilby PR. Direct 765 nm Optical Excitation of Molecular Oxygen in Solution and in Single Mammalian Cells. J Phys Chem B 2015; 119:5422-9. [DOI: 10.1021/acs.jpcb.5b01727] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Mikkel Bregnhøj
- Center
for Oxygen Microscopy and Imaging, Department of Chemistry, Aarhus University, Langelandsgade 140, Aarhus 8000, Denmark
| | - Alfonso Blázquez-Castro
- Center
for Oxygen Microscopy and Imaging, Department of Chemistry, Aarhus University, Langelandsgade 140, Aarhus 8000, Denmark
- Aarhus
Institute of Advanced Studies, Aarhus University, Høegh-Guldbergs Gade 6B, Aarhus 8000, Denmark
| | - Michael Westberg
- Center
for Oxygen Microscopy and Imaging, Department of Chemistry, Aarhus University, Langelandsgade 140, Aarhus 8000, Denmark
| | - Thomas Breitenbach
- Center
for Oxygen Microscopy and Imaging, Department of Chemistry, Aarhus University, Langelandsgade 140, Aarhus 8000, Denmark
| | - Peter R. Ogilby
- Center
for Oxygen Microscopy and Imaging, Department of Chemistry, Aarhus University, Langelandsgade 140, Aarhus 8000, Denmark
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Krasnovsky AA, Kozlov AS. New approach to measurement of IR absorption spectra of dissolved oxygen molecules based on photochemical activity of oxygen upon direct laser excitation. Biophysics (Nagoya-shi) 2014. [DOI: 10.1134/s000635091402016x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Singlet oxygen () generation upon 1270nm laser irradiation of ground state oxygen () dissolved in organic solvents: Simultaneous and independent determination of production rate and reactivity with chemical traps. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2012.10.063] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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