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Hockey EK, McLane N, Martí C, Duckett L, Osborn DL, Dodson LG. Direct Observation of Gas-Phase Hydroxymethylene: Photoionization and Kinetics Resulting from Methanol Photodissociation. J Am Chem Soc 2024; 146:14416-14421. [PMID: 38744681 DOI: 10.1021/jacs.4c03090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Carbene species play an integral role in high-energy chemistry, transition-metal-carbene chemistry, catalysis, photolytic formation of carbohydrates, and possibly even the formation of interstellar sugars. In 1921, "reactive formaldehyde"─now known as hydroxymethylene (HCOH)─was first implicated as an intermediate in photocatalytic processes. However, due to its transient nature, direct observation of HCOH has predominantly been attained using cryogenic isolation methods. As a result, HCOH gas-phase reactivity measurements have been limited. We directly observed HCOH using photoionization spectroscopy following UV photodissociation of methanol. Our measurements show it reacts slowly with O2 at room temperature. This work provides evidence for the formation mechanism of HCOH from CH3OH and its subsequent reactivity under gas-phase reaction conditions.
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Affiliation(s)
- Emily K Hockey
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Nathan McLane
- Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, United States
| | - Carles Martí
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, United States
| | - LeAnh Duckett
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - David L Osborn
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, United States
- Department of Chemical Engineering, University of California, Davis, California 95616, United States
| | - Leah G Dodson
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
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Akerman M, Iny H, Sagi R, Asscher M. Chemical Reactivity of Strongly Interacting, Hydrogen-Bond-Forming Molecules Following 193 nm Photon Irradiation: Methanol in Amorphous Solid Water at Low Temperatures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:2838-2849. [PMID: 36763094 PMCID: PMC9948533 DOI: 10.1021/acs.langmuir.2c03441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/26/2023] [Indexed: 06/18/2023]
Abstract
Mixtures of methanol and amorphous solid water (ASW) ices are observed in the interstellar medium (ISM), where they are subject to irradiation by UV photons and bombardment by charged particles. The charged particles, if at high enough density, induce a local electric field in the ice film that potentially affects the photochemistry of these ices. When CD3OD@ASW ices grown at 38 K on a Ru(0001) substrate are irradiated by 193 nm (6.4 eV) photons, products such as HD, D2, CO, and CO2 are formed in large abundances relative to the initial amount of CD3OD. Other molecules such as D2O, CD4, acetaldehyde, and ethanol and/or dimethyl ether are also observed, but in smaller relative abundances. The reactivity cross sections range from (2.6 ± 0.3) × 10-21 to (3.8 ± 0.3) × 10-25 cm2/photon. The main products are formed through two competing mechanisms: direct photodissociation of methanol and water and dissociative electron attachment (DEA) by photoelectrons ejected from the Ru(0001) substrate. An electric field of 2 × 108 V/m generated within the ASW film during Ne+ ions bombardment is apparently not strong enough to affect the relative abundances (selectivity) of the photochemical products observed in this study.
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Pires F, Geraldo VP, Antunes A, Marletta A, Oliveira ON, Raposo M. On the role of epigallocatechin-3-gallate in protecting phospholipid molecules against UV irradiation. Colloids Surf B Biointerfaces 2019; 173:312-319. [DOI: 10.1016/j.colsurfb.2018.09.065] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 09/12/2018] [Accepted: 09/25/2018] [Indexed: 02/02/2023]
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Baker LA, Marchetti B, Karsili TNV, Stavros VG, Ashfold MNR. Photoprotection: extending lessons learned from studying natural sunscreens to the design of artificial sunscreen constituents. Chem Soc Rev 2018; 46:3770-3791. [PMID: 28580469 DOI: 10.1039/c7cs00102a] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Evolution has ensured that plants and animals have developed effective protection mechanisms against the potentially harmful effects of incident ultraviolet radiation (UVR). Tanning is one such mechanism in humans, but tanning only occurs post-exposure to UVR. Hence, there is ever growing use of commercial sunscreens to pre-empt overexposure to UVR. Key requirements for any chemical filter molecule used in such a photoprotective capacity include a large absorption cross-section in the UV-A and UV-B spectral regions and the availability of one or more mechanisms whereby the absorbed photon energy can be dissipated without loss of the molecular integrity of the chemical filter. Here we summarise recent experimental (mostly ultrafast pump-probe spectroscopy studies) and computational progress towards unravelling various excited state decay mechanisms that afford the necessary photostability in chemical filters found in nature and those used in commercial sunscreens. We also outline ways in which a better understanding of the photophysics and photochemistry of sunscreen molecules selected by nature could aid the design of new and improved commercial sunscreen formulations.
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Affiliation(s)
- Lewis A Baker
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK.
| | - Barbara Marchetti
- Department of Chemistry, University of Pennsylvania, Philadelphia, USA
| | | | - Vasilios G Stavros
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK.
| | - Michael N R Ashfold
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
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Balabanoff ME, Ruzi M, Anderson DT. Signatures of a quantum diffusion limited hydrogen atom tunneling reaction. Phys Chem Chem Phys 2018; 20:422-434. [DOI: 10.1039/c7cp05064j] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We are studying the details of hydrogen atom (H atom) quantum diffusion in parahydrogen quantum solids in an effort to better understand H atom transport and reactivity under these conditions.
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Affiliation(s)
| | - Mahmut Ruzi
- Department of Chemistry
- University of Wyoming
- Laramie
- USA
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Karsili TNV, Fennimore MA, Matsika S. Electron-induced origins of prebiotic building blocks of sugars: mechanism of self-reactions of a methanol anion dimer. Phys Chem Chem Phys 2018; 20:12599-12607. [DOI: 10.1039/c8cp00148k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reactions of methanol dimers in interstellar medium driven by low energy irradiation may lead to prebiotic precursors.
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Saenko EV, Feldman VI. Radiation-induced transformations of methanol molecules in low-temperature solids: a matrix isolation study. Phys Chem Chem Phys 2016; 18:32503-32513. [DOI: 10.1039/c6cp06082j] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Radiation-induced transformations of methanol in inert solids at 6 K reveal remarkable matrix effects, and mechanisms and astrochemical implications are discussed.
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Zhang Y, Oliver TAA, Das S, Roy A, Ashfold MNR, Bradforth SE. Exploring the Energy Disposal Immediately After Bond-Breaking in Solution: The Wavelength-Dependent Excited State Dissociation Pathways of para-Methylthiophenol. J Phys Chem A 2013; 117:12125-37. [DOI: 10.1021/jp405160n] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuyuan Zhang
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089-0482, United States
| | - Thomas A. A. Oliver
- School of Chemistry, Cantocks Close, University of Bristol, Bristol BS8 1TS, U.K
| | - Saptaparna Das
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089-0482, United States
| | - Anirban Roy
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089-0482, United States
| | | | - Stephen E. Bradforth
- Department
of Chemistry, University of Southern California, Los Angeles, California 90089-0482, United States
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Lin JJ, Harich S, Hwang DW, Wu MS, Lee YT, Yang X. Dynamics of Atomic and Molecular Hydrogen Elimination from Hydrocarbons at VUV Excitation. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.199900060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Duarte AA, Gomes PJ, Ribeiro JHF, Ribeiro PA, Hoffmann SV, Mason NJ, Oliveira ON, Raposo M. Characterization of PAH/DPPG layer-by-layer films by VUV spectroscopy. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2013; 36:98. [PMID: 24008406 DOI: 10.1140/epje/i2013-13098-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 07/03/2013] [Accepted: 07/03/2013] [Indexed: 06/02/2023]
Abstract
The spectroscopic characterization of layer-by-layer (LbL) films containing liposomes is essential not only for determining the precise film architecture but also to guide the design of drug delivery systems. In this study we provide the first report of vacuum ultraviolet spectroscopy (VUV) characterization of LbL films made with liposomes from 1.2-dipalmitoyl-sn-Glycero-3-[Phospho-rac-(1-glycerol)] (Sodium Salt) (DPPG) alternated with poly(allylamine hydrochloride) (PAH). Measurements in the 6.0-9.5eV range allowed us to identify the electronic transitions responsible for the spectra, which were assigned to carboxyl, hydroxyl and phosphate groups in DPPG while the PAH spectra were governed by electronic transitions in the amino groups. The surface mass density of the LbL films could be determined, from which the formation of a DPPG bilayer was inferred. This rupture of the liposomes into bilayers was confirmed with atomic force microscopy measurements. In subsidiary experiments we ensured that the UV irradiation in vacuum had negligible damage in the DPPG liposomes during the course of the VUV measurements. In addition to demonstrating the usefulness of VUV spectroscopy, the results presented here may be exploited in biological applications of liposome-containing films.
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Affiliation(s)
- Andreia A Duarte
- CEFITEC, Departamento de Fısica, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal
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Chen Z, Eppink ATJB, Jiang B, Groenenboom GC, Yang X, Parker DH. Product pair correlation in CH3OH photodissociation at 157 nm: the OH + CH3channel. Phys Chem Chem Phys 2011; 13:2350-5. [DOI: 10.1039/c0cp01794a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ashfold MNR, King GA, Murdock D, Nix MGD, Oliver TAA, Sage AG. πσ* excited states in molecular photochemistry. Phys Chem Chem Phys 2010; 12:1218-38. [DOI: 10.1039/b921706a] [Citation(s) in RCA: 274] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hama T, Yokoyama M, Yabushita A, Kawasaki M, Wickramasinghe P, Guo W, Loock HP, Ashfold MNR, Western CM. Translational and internal energy distributions of methyl and hydroxyl radicals produced by 157nm photodissociation of amorphous solid methanol. J Chem Phys 2009; 131:224512. [DOI: 10.1063/1.3259877] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yuan KJ, Cheng Y, Wang FY, Yang XM. Photodissociation Dynamics of Methanol and Ethanol at 157 nm. CHINESE J CHEM PHYS 2008. [DOI: 10.1088/1674-0068/21/04/301-307] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hutchison JM, Holiday RJ, Bach A, Hsieh S, Crim FF. Action Spectroscopy and Photodissociation of Vibrationally Excited Methanol. J Phys Chem A 2004. [DOI: 10.1021/jp049074d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Matthew Hutchison
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706
| | - Robert J. Holiday
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706
| | - Andreas Bach
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706
| | - Shizuka Hsieh
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706
| | - F. Fleming Crim
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706
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Maçôas EMS, Khriachtchev L, Fausto R, Räsänen M. Photochemistry and Vibrational Spectroscopy of the Trans and Cis Conformers of Acetic Acid in Solid Ar. J Phys Chem A 2004. [DOI: 10.1021/jp037840v] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- E. M. S. Maçôas
- Department of Chemistry, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland, and Department of Chemistry (CQC), University of Coimbra, P-3004-535 Coimbra, Portugal
| | - L. Khriachtchev
- Department of Chemistry, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland, and Department of Chemistry (CQC), University of Coimbra, P-3004-535 Coimbra, Portugal
| | - R. Fausto
- Department of Chemistry, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland, and Department of Chemistry (CQC), University of Coimbra, P-3004-535 Coimbra, Portugal
| | - M. Räsänen
- Department of Chemistry, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland, and Department of Chemistry (CQC), University of Coimbra, P-3004-535 Coimbra, Portugal
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Lee SH, Lee HI, Lee YT. Distributions of angular anisotropy and kinetic energy of products from the photodissociation of methanol at 157 nm. J Chem Phys 2004; 121:11053-9. [PMID: 15634056 DOI: 10.1063/1.1814099] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We investigated distributions of angular-anisotropy parameter beta and kinetic energy of fragments after photodissociation of methanol using time-of-flight (TOF) mass spectrometry. Fragments, in particular CH(3)O and CO, were successfully detected using tunable radiation from a synchrotron for photoionization. Following O-H bond fission, a CH(3)O fragment with internal energy greater than 104 kJ mol(-1) dissociates to CH(2)O+H. Elimination of two H(2) accompanies formation of CO. The beta value of hydroxyl hydrogen is -0.26 whereas that of methyl hydrogen is zero. H(2) has two distinct components in TOF spectra; these rapid and slow components have beta values -0.30 and -0.18, respectively. The CH(3)+OH dissociation exhibits a highly anisotropic angular distribution with beta= -0.75. The beta values of fragments from CD(3)OH photolysis are addressed. From measurements of angular-anisotropy parameters of various fragments, we surmise that the transition dipole moment mu is almost perpendicular to the C-O-H plane and that n-3p(x) (2 (1)A") is the major photoexcited state at 157 nm.
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Affiliation(s)
- Shih-Huang Lee
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30077, Taiwan.
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Zhou W, Yuan Y, Zhang J. Photodissociation dynamics of 1-propanol and 2-propanol at 193.3 nm. J Chem Phys 2003. [DOI: 10.1063/1.1607320] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cheng BM, Bahou M, Chen WC, Yui CH, Lee YP, Lee LC. Experimental and theoretical studies on vacuum ultraviolet absorption cross sections and photodissociation of CH3OH, CH3OD, CD3OH, and CD3OD. J Chem Phys 2002. [DOI: 10.1063/1.1485769] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Wisniewski ES, Hershberger MA, Castleman AW. Solvation effects on electronic excited states of methanol: A study of neat and mixed methanol/water clusters. J Chem Phys 2002. [DOI: 10.1063/1.1456505] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Hsu TC, Shu J, Chen Y, Lin JJ, Lee YT, Yang X. Dissociation rates of benzene at VUV excitation. J Chem Phys 2001. [DOI: 10.1063/1.1423945] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lin JJ, Shu J, Lee YT, Yang X. Multiple dynamical pathways in the O([sup 1]D)+CH[sub 4] reaction: A comprehensive crossed beam study. J Chem Phys 2000. [DOI: 10.1063/1.1289462] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Harich S, Lin JJ, Lee YT, Yang X. Photodissociation Dynamics of Methanol at 157 nm. J Phys Chem A 1999. [DOI: 10.1021/jp991987y] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- S. Harich
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan, Republic of China, Department of Chemistry, University of California at Santa Barbara, Santa Barbara, California, and Department of Chemistry, National Taiwan University, Taipei, Taiwan, Republic of China
| | - J. J. Lin
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan, Republic of China, Department of Chemistry, University of California at Santa Barbara, Santa Barbara, California, and Department of Chemistry, National Taiwan University, Taipei, Taiwan, Republic of China
| | - Y. T. Lee
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan, Republic of China, Department of Chemistry, University of California at Santa Barbara, Santa Barbara, California, and Department of Chemistry, National Taiwan University, Taipei, Taiwan, Republic of China
| | - X. Yang
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan, Republic of China, Department of Chemistry, University of California at Santa Barbara, Santa Barbara, California, and Department of Chemistry, National Taiwan University, Taipei, Taiwan, Republic of China
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Xu K, Amaral G, Zhang J. Photodissociation dynamics of ethanol at 193.3 nm: The H-atom channel and ethoxy vibrational distribution. J Chem Phys 1999. [DOI: 10.1063/1.479960] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Harich S, Lin JJ, Lee YT, Yang X. Competing atomic and molecular hydrogen pathways in the photodissociation of methanol at 157 nm. J Chem Phys 1999. [DOI: 10.1063/1.479249] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lin JJ, Harich S, Lee YT, Yang X. Dynamics of the O(1D)+CH4 reaction: Atomic hydrogen channel vs molecular hydrogen channel. J Chem Phys 1999. [DOI: 10.1063/1.479024] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lin JJ, Wu SM, Hwang DW, Lee YT, Yang X. Photodissociation dynamics of 1,1-difluoroethylene at 157 nm excitation. J Chem Phys 1998. [DOI: 10.1063/1.477780] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Lin JJ, Lee YT, Yang X. Crossed molecular beam studies of the O(1D)+CH4 reaction: Evidences for the CH2OH+H channel. J Chem Phys 1998. [DOI: 10.1063/1.476887] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Brownsword RA, Hillenkamp M, Schmiechen P, Volpp HR, Upadhyaya HP. Absolute Reactive Cross Section for H Atom Formation in the Reaction of Translationally Energetic O(1D) Atoms with Methane. J Phys Chem A 1998. [DOI: 10.1021/jp980652y] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Richard A. Brownsword
- Physikalisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
| | - Matthias Hillenkamp
- Physikalisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
| | - Patricia Schmiechen
- Physikalisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
| | - Hans-Robert Volpp
- Physikalisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
| | - Hari P. Upadhyaya
- Chemistry Division, Bhabha Atomic Research Centre, Bombay 400 085, India
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Thomas Lorenz K, Cowen KA, Fleming PE, Mathews MG, Herman MF, Koplitz B. Toward understanding the role of Stark effects when probing the nuclear hyperfine states of atomic hydrogen. Chem Phys Lett 1996. [DOI: 10.1016/0009-2614(96)00908-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Morgan CG, Drabbels M, Wodtke AM. The correlated product state distribution of ketene photodissociation at 308 nm. J Chem Phys 1996. [DOI: 10.1063/1.471459] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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van Zee RD, Stephenson JC. Lifetime of the CH3OH* intermediate in the reaction CH4+O(1D2)→CH3OH*→CH3+OH. J Chem Phys 1995. [DOI: 10.1063/1.469132] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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