1
|
Michon MA, Chmielniak P, Weber PM, Rose-Petruck C. Two-photon chemistry of tetrahydrofuran in clathrate hydrates. Phys Chem Chem Phys 2024; 26:2568-2579. [PMID: 38170862 DOI: 10.1039/d3cp02607h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
High-lying electronic states hold the potential for new and unusual photochemical reactions. However, for conventional single-photon excitation in the condensed phase, reaching these states is often not possible because the vacuum-ultraviolet (VUV) light required is competitively absorbed by the surrounding matrix rather than the molecule of interest. Here, this hurdle is overcome by leveraging nonresonant two-photon absorption (2PA) at 265 nm to achieve preferential photolysis of tetrahydrofuran (THF) trapped within a clathrate hydrate network at 77 K. Electron spin resonance (ESR) spectroscopy enables direct observation and identification of otherwise short-lived organic radicals stabilized by the clathrate cages, providing clues into the rapid dynamics that immediately follow photoexcitation. 2PA induces extensive fragmentation of enclathrated THF yielding 1-alkyl, acyl, allyl and methyl radicals-a stark departure from the reactive motifs commonly reported in γ-irradiated hydrates. We speculate on the undetected transient dynamics and explore the potential role of trapped electrons generated from water and THF. This demonstration of nonresonant two-photon chemistry presents an alternative approach to targeted condensed phase photochemistry in the VUV energy range.
Collapse
Affiliation(s)
- Michael A Michon
- Department of Chemistry, Brown University, Providence, 02912, Rhode Island, USA.
| | - Pawel Chmielniak
- Department of Chemistry, Brown University, Providence, 02912, Rhode Island, USA.
| | - Peter M Weber
- Department of Chemistry, Brown University, Providence, 02912, Rhode Island, USA.
| | | |
Collapse
|
2
|
Fujii K, Izumi Y, Narita A, Ghose KK, López-Tarifa P, Touati A, Spezia R, Vuilleumier R, Gaigeot MP, Politis MF, Du Penhoat MAH, Yokoya A. Roles of Hydration for Inducing Decomposition of 2-Deoxy-d-ribose by Ionization of Oxygen K-Shell Electrons. Radiat Res 2018; 189:264-272. [DOI: 10.1667/rr14225.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Kentaro Fujii
- Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, Japan
| | - Yudai Izumi
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-0046, Japan
| | - Ayumi Narita
- Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-0046, Japan
| | - Krishna Kamol Ghose
- LAMBE UMR CNRS 8587, Université d'Evry val d'Essonne, Evry, & Université Paris-Sacley, France France
| | - Pablo López-Tarifa
- École Polytechnique Fédérale de Lausanne, EPFL SB-ISIC-LCBC-BCH, 1015, Lausanne, Switzerland
| | - Alain Touati
- IMPMC, Sorbonne Universités - UPMC Univ Paris 06, UMR CNRS 7590, MNHN, IRD UMR 206, Paris, France
| | - Riccardo Spezia
- LAMBE UMR CNRS 8587, Université d'Evry val d'Essonne, Evry, & Université Paris-Sacley, France France
| | - Rodolphe Vuilleumier
- PASTEUR, Département de chimie, École normale supérieure, PSL Research University, Sorbonne Universités, UPMC Univ. Paris 06, CNRS, Paris 75005, France
| | - Marie-Pierre Gaigeot
- LAMBE UMR CNRS 8587, Université d'Evry val d'Essonne, Evry, & Université Paris-Sacley, France France
| | - Marie-Françoise Politis
- LAMBE UMR CNRS 8587, Université d'Evry val d'Essonne, Evry, & Université Paris-Sacley, France France
| | | | - Akinari Yokoya
- Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, Japan
| |
Collapse
|
3
|
Alizadeh E, Sanche L. Precursors of solvated electrons in radiobiological physics and chemistry. Chem Rev 2012; 112:5578-602. [PMID: 22724633 DOI: 10.1021/cr300063r] [Citation(s) in RCA: 225] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Elahe Alizadeh
- Groupe en Sciences des Radiations, Département de Médecine Nucléaire et Radiobiologie, Faculté de médecine et des sciences de la santé, Université de Sherbrooke, Canada
| | | |
Collapse
|
4
|
Mirsaleh-Kohan N, Bass AD, Cloutier P, Massey S, Sanche L. Low energy electron stimulated desorption from DNA films dosed with oxygen. J Chem Phys 2012; 136:235104. [PMID: 22779623 PMCID: PMC3820536 DOI: 10.1063/1.4729781] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Desorption of anions stimulated by 1-18 eV electron impact on self-assembled monolayer (SAM) films of single DNA strands is measured as a function of film temperature (50-250 K). The SAMs, composed of 10 nucleotides, are dosed with O(2). The OH(-) desorption yields increase markedly with exposure to O(2) at 50 K and are further enhanced upon heating. In contrast, the desorption yields of O(-), attributable to dissociative electron attachment to trapped O(2) molecules decrease with heating. Irradiation of the DNA films prior to the deposition of O(2) shows that this surprising increase in OH(-) desorption, at elevated temperatures, arises from the reaction of O(2) with damaged DNA sites. These results thus appear to be a manifestation of the so-called "oxygen fixation" effect, well known in radiobiology.
Collapse
Affiliation(s)
- Nasrin Mirsaleh-Kohan
- Groupe en sciences des radiations, Faculté de médecine et des sciences de la santé, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | | | | | | | | |
Collapse
|
5
|
Park Y, Noh HA, Cho H. Effect of Low-Energy Electron Irradiation on DNA Damage by Fe3+Ion. Radiat Res 2012; 177:775-80. [DOI: 10.1667/rr2844.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
6
|
Massey S, Gallino E, Cloutier P, Tatoulian M, Sanche L, Mantovani D, Roy D. Low-energy electrons and X-ray irradiation effects on plasma-polymerized allylamine bioactive coatings for stents. Polym Degrad Stab 2010. [DOI: 10.1016/j.polymdegradstab.2009.11.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
7
|
Yildirim Y, Balcan M, Bass AD, Cloutier P, Sanche L. Electron stimulated desorption of anions and cations from condensed allyl glycidyl ether. Phys Chem Chem Phys 2010; 12:7950-8. [DOI: 10.1039/b925347e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
|
8
|
|
9
|
Deng Z, Bald I, Illenberger E, Huels MA. Hyperthermal (1–100eV) nitrogen ion scattering damage to D-ribose and 2-deoxy-D-ribose films. J Chem Phys 2007; 127:144715. [DOI: 10.1063/1.2772259] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
10
|
Park YS, Cho H, Parenteau L, Bass AD, Sanche L. Cross sections for electron trapping by DNA and its component subunits I: Condensed tetrahydrofuran deposited on Kr. J Chem Phys 2007; 125:074714. [PMID: 16942371 DOI: 10.1063/1.2229201] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
We report cross sections for electron capture processes occurring in condensed tetrahydrofuran (THF) for incident electron energies in the range of 0-9 eV. The charge trapping cross section for 6-9 eV electrons is very small, and an upper limit of 4 x 10(-19) cm2 is estimated from our results. This latter is thus also an upper bound for the cross section for dissociative electron attachment process that is known to occur at these energies for condensed THF. At energies close to zero eV electron trapping proceeds via intermolecular stabilization. The cross section for this process is strongly dependent on the quantity of deposited THF. Since THF may model the furyl ring found in deoxyribose, these measurements indicate that this ring likely plays little role in either initiating or enhancing strand break damage via the attachment of the low energy secondary electrons produced when DNA is exposed to ionizing radiation.
Collapse
Affiliation(s)
- Yeun Soo Park
- Department of Physics, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon 305-764, Korea
| | | | | | | | | |
Collapse
|
11
|
Deng Z, Bald I, Illenberger E, Huels MA. Reactive scattering damage to DNA components by hyperthermal secondary ions. PHYSICAL REVIEW LETTERS 2006; 96:243203. [PMID: 16907238 DOI: 10.1103/physrevlett.96.243203] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2006] [Indexed: 05/11/2023]
Abstract
We have observed reactive scattering damage to fundamental DNA building blocks by the type of hyperthermal secondary ions that are produced along heavy ion tracks in biological media. Reactions include carbon abstraction by N+, and hydrogen abstraction by O- and N+, at collision energies down to 1 eV. Our results show that localized reactive scattering by hyperthermal secondary fragments can lead to important physicochemical damage to DNA in cells irradiated by heavy ions. This suggests a fundamentally different picture of nascent DNA damage induced by heavy ion tracks, compared to conventional (x or gamma) radiation tracks.
Collapse
Affiliation(s)
- Zongwu Deng
- Ion Reaction Laboratory, Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, University of Sherbrooke, Sherbrooke, Quebec, J1H 5N4, Canada
| | | | | | | |
Collapse
|
12
|
Bald I, Deng Z, Illenberger E, Huels MA. 10–100 eV Ar+ ion induced damage to d-ribose and 2-deoxy-d-ribose molecules in condensed phase. Phys Chem Chem Phys 2006; 8:1215-22. [PMID: 16633602 DOI: 10.1039/b514754a] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report that 10-100 eV Ar+ ion irradiation induces severe damage to the biologically relevant sugar molecules D-ribose and 2-deoxy-D-ribose in the condensed phase on a polycrystalline Pt substrate. Ar+ ions with kinetic energies down to 15 eV induce effective decomposition of both sugar molecules, leading to the desorption of abundant cation and anion fragments, including CH3+, C2H3+, C3H3+, H3O+, CHO+, CH3O+, C2H3O+, H-, O-, and OH-, etc. Use of isotopically labelled molecules (5- 13C D-ribose and 1-D D-ribose) reveals the site specificity for some of the fragment origins, and thus the nature of the chemical bond breaking. It is found that all of the chemical bonds in both molecules are vulnerable to ion impact at energies down to 15 eV, particularly both the endo- and exocyclic C-O bonds. In addition to molecular fragmentation, several chemical reactions are also observed. A small amount of O-/O fragments abstract hydrogen to form OH-. It is found that the formation of the H3O+ ion is related to the hydroxyl groups of the sugar molecules, and is associated with additional hydrogen loss from the parent or adjacent molecules via hydrogen abstraction or proton transfer. The formation of several other cation fragments also requires hydrogen abstraction from its parent or an adjacent molecule. These fragmentations and reactions are likely to occur in a real biomedium during ionizing radiation treatment of tumors and thus bear significant radiobiological relevance.
Collapse
Affiliation(s)
- Ilko Bald
- Ion Reaction Laboratory, Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, University of Sherbrooke, Sherbrooke, Quebec, CanadaJ1H 5N4
| | | | | | | |
Collapse
|
13
|
Deng Z, Imhoff M, Huels MA. Fragmentation dynamics of condensed phase thymine by low-energy (10–200eV) heavy-ion impact. J Chem Phys 2005; 123:144509. [PMID: 16238409 DOI: 10.1063/1.2046671] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report measurements of the formation and desorption of ionic fragments induced by very low-energy (10-200 eV) Ar(+) irradiation of thymine (T) films, deposited on a polycrystalline Pt substrate. A multitude of dissociation channels is observed, among which the major cation species are identified as HNCH(+), HNC(3)H(4) (+), C(3)H(3) (+), OCNH(2) (+), [T-OCN](+), [T-OCNH(2)](+), [T-O](+), and [T+H](+) and the major anions as H(-), O(-), CN(-),and OCN(-). Cation fragment desorption appears at much lower threshold energies (near 15 eV) than anion fragment desorption, where the latter depends strongly on the film thickness. It is proposed that anion fragment formation and desorption results from projectile impact-induced excitation of either (1) a neutral thymine molecule, followed by fragmentation and charge exchange between the energetic neutral fragment and the substrate (or film) and/or (2) a deprotonated monoanionic thymine molecule to a dissociative state, followed by a unimolecular fragmentation of the excited thymine anion. The H(-) and O(-) fragment formations may have a further contribution from dipolar dissociation, e.g., formation of electronically excited neutral thymine, followed by dissociation into O(-)+[T-O](+), due to their reduced sensitivity to the film thickness. Positive-ion fragment desorption exhibits no significant dependence on film thickness before the emergence of surface charging, and originates from a kinetically assisted charge-transfer excitation. The results suggest that the potential energy of the incident ion plays a significant role in lowering the threshold energy of kinetic fragmentation of thymine. Measurements of the time-dependent film degradation yields for 100-eV Ar(+) suggest a quantum efficiency for degradation of about six thymine molecules per incident ion.
Collapse
Affiliation(s)
- Zongwu Deng
- Ion Reaction Laboratory, Department of Nuclear Medicine and Radiobiology, Faculty of Medicine, University of Sherbrooke, Quebec, Canada
| | | | | |
Collapse
|
14
|
Pan X, Sanche L. Mechanism and site of attack for direct damage to DNA by low-energy electrons. PHYSICAL REVIEW LETTERS 2005; 94:198104. [PMID: 16090218 DOI: 10.1103/physrevlett.94.198104] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2005] [Indexed: 05/03/2023]
Abstract
We report results on the desorption of OH- induced by 0-19 eV electrons incident on self-assembled monolayer films made of single and double DNA strands of different orientations with respect to a gold substrate. Such measurements make it possible to deduce the mechanism and site of OH- formation within a biomolecule as complex as DNA. This type of damage is attributed to dissociative electron attachment to the phosphate group of DNA, when it contains the counterion H+.
Collapse
Affiliation(s)
- X Pan
- Group in the Radiation Sciences, Department of Nuclear Medicine and Radiobiology, Faculty of Medicine, University of Sherbrooke, Quebec, Canada
| | | |
Collapse
|
15
|
Imhoff M, Parenteau L, Sanche L, Huels MA. Low energy electron and O– reactions in films of O2 coadsorbed with benzene or toluene. Phys Chem Chem Phys 2005; 7:3359-67. [PMID: 16240051 DOI: 10.1039/b506973d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A detailed understanding of nascent reactive events leading to DNA damage is required to describe ionizing radiation effects on living cells. These early, sub-picosecond events involve mainly low energy (E < 20 eV) secondary electrons (SE), and low energy (E < 5 eV) secondary ion (and neutral) fragments; the latter are created either by the primary radiation, or by SE via dissociative electron attachment (DEA). While recent work has shown that SE initiate DNA strand break formation via DEA, the subsequent damage induced by the DEA ion fragments in DNA, or its basic components is unknown. Here, we report 0-20 eV electron impact measurements of anion desorption from condensed films containing O2 and either benzene (C6H6), or toluene (C6H5CH3); these molecules represent the most fundamental structural analogs of pyrimidine bases. Our experiments show that all of the observed OH- yields are the result of reactive scattering of 1-5 eV O- fragments produced initially by DEA to O2. These O- reactions involve hydrogen abstraction from benzene or toluene, and result in the formation of benzyl radicals, or toluene radicals centered on either the ring or exocyclic methyl group. O- scatters over nm distances comparable to DNA dimensions, and reactions involve a transient anion collision complex. Anion desorption is found to depend on both, the temperature of hydrocarbon film formation (morphology), and the order of overlayer adsorption, e.g. O2 on benzene, or benzene on O2. Our measurements support the notion that in irradiated DNA similar secondary-ion reactions can be initiated by the abundant secondary electrons, and may lead to clustered damage.
Collapse
Affiliation(s)
- Marjorie Imhoff
- Dept. of Nuclear Medicine and Radiobiology, Faculty of Medicine, University of Sherbrooke, Sherbrooke, Québec, CanadaJ1H 5N4
| | | | | | | |
Collapse
|