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Feldman VI, Ryazantsev SV, Kameneva SV. Matrix isolation in laboratory astrochemistry: state-of-the-art, implications and perspective. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr4995] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Désesquelles P, Van-Oanh NT, Xu L, Luo Y, Mai TVT, Huynh LK, Domin D. Multiple dehydrogenation of fluorene cation and neutral fluorene using the statistical molecular fragmentation model. Phys Chem Chem Phys 2021; 23:9900-9910. [PMID: 33908424 DOI: 10.1039/d0cp06100j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The statistical molecular fragmentation (SMF) model was used to analyze the 306 fragmentation channels (containing 611 different species) that result from the fluorene (C13H10+) cation losing up to three hydrogen atoms (neutral radicals and/or a proton). Breakdown curves from such analysis permit one to extract experimentally inaccessible information about the fragmentation of the fluorene cation, such as the locations of the lost hydrogen atoms (or proton), yields of the neutral fragments, electronic states of the residues, and quantification of very low probability channels that would be difficult to detect. Charge localization during the fragmentation pathways was studied to provide a qualitative understanding of the fragmentation process. Breakdown curves for both the fluorene cation and neutral fluorene were compared. The SMF results match the rise and fall of the one hydrogen loss yield experimentally measured by imaging photoelectron-photoion coincidence spectroscopy using a VUV synchrotron.
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Affiliation(s)
- Pierre Désesquelles
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Gaz et des Plasmas, 91405, Orsay, France
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Photoinduced reversible isomerization of 9H-fluorene into 1H-fluorene by means of hydrogen-atom migration and the lowest electronically excited triplet state studied by matrix-isolation FTIR spectroscopy. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2018.11.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Fulara J, Chakraborty A, Maier JP. Electronic Characterization of Reaction Intermediates: The Fluorenylium, Phenalenylium, and Benz[f]indenylium Cations and Their Radicals. Angew Chem Int Ed Engl 2016; 55:3424-7. [PMID: 26845059 DOI: 10.1002/anie.201511230] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Indexed: 11/09/2022]
Abstract
Three vibrationally resolved absorption systems commencing at 538, 518, and 392 nm were detected in a 6 K neon matrix after mass-selected deposition of C13 H9 (+) ions (m/z=165) produced from fluorene in a hot-cathode discharge ion source. The benz[f]indenylium (BfI(+) : 538 nm), fluorenylium (FL9(+) : 518 nm), and phenalenylium (PHL(+) : 392 nm) cations are the absorbing molecules. Two electronic systems corresponding to neutral species are apparent at 490 and 546 nm after irradiation of the matrix with λ<260 nm photons and were assigned to the FL9 and BfI radicals, respectively. The strongest peak at 518 nm is the origin of the 2 (1) B2 ←X̃ (1) A1 absorption of FL9(+) , and the 490 nm band is the 2 (2) A2 ←X̃ (2) B1 origin of FL9. The electronic systems commencing at 538 nm and 546 nm were assigned to the 1 (1) A1 ←X̃ (1) A1 and 1 (2) A2 ←X̃ (2) A2 transitions of BfI(+) and BfI. The 392 nm band is the 1 (1) E'←X̃ (1) A1 ' transition of PHL(+). The electronic spectra of C13 H9 (+) /C13 H9 were assigned on the basis of the vertical excitation energies calculated with SAC-CI and MS-CASPT2 methods.
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Affiliation(s)
- Jan Fulara
- Departement Chemie, Universität Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland.,Institute of Physics, Polish Academy of Sciences, Al. Lotników, 32/46, 02-668, Warsaw, Poland
| | - Arghya Chakraborty
- Departement Chemie, Universität Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland
| | - John P Maier
- Departement Chemie, Universität Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland.
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Fulara J, Chakraborty A, Maier JP. Electronic Characterization of Reaction Intermediates: The Fluorenylium, Phenalenylium, and Benz[f
]indenylium Cations and Their Radicals. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511230] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jan Fulara
- Departement Chemie; Universität Basel; Klingelbergstrasse 80 4056 Basel Switzerland
- Institute of Physics; Polish Academy of Sciences; Al. Lotników, 32/46 02-668 Warsaw Poland
| | - Arghya Chakraborty
- Departement Chemie; Universität Basel; Klingelbergstrasse 80 4056 Basel Switzerland
| | - John P. Maier
- Departement Chemie; Universität Basel; Klingelbergstrasse 80 4056 Basel Switzerland
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Kim JB, Weichman ML, Yacovitch TI, Shih C, Neumark DM. Slow photoelectron velocity-map imaging spectroscopy of the C9H7 (indenyl) and C13H9 (fluorenyl) anions. J Chem Phys 2013; 139:104301. [DOI: 10.1063/1.4820138] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Valence one-electron and shake-up ionization bands of fluorene, carbazole and dibenzofuran. Chem Phys 2013. [DOI: 10.1016/j.chemphys.2013.05.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Karpicz R, Puzinas S, Sulskus J, Malickaja S, Grigalevicius S, Gulbinas V. Electronic properties of carbazole–fluorene–benzothiadiazole compounds revealed by time resolved spectroscopy and quantum chemistry calculations. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2012.03.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abouaf R, Díaz-Tendero S. Electron energy loss spectroscopy and anion formation in gas phase coronene. Phys Chem Chem Phys 2009; 11:5686-94. [DOI: 10.1039/b904614c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Boo BH, Lee JK, Lim EC. Ab initio, DFT, and spectroscopic studies of excited-state structure and dynamics of 9-ethylfluorene. J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2008.05.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Kumar A, Sevilla MD. Photoexcitation of dinucleoside radical cations: a time-dependent density functional study. J Phys Chem B 2007; 110:24181-8. [PMID: 17125390 PMCID: PMC2526166 DOI: 10.1021/jp064524i] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The excited states of dinucleoside phosphates (dGpdG, dApdA, dApdT, TpdA, and dGpdT) in their cationic radical states were studied with time-dependent density functional theory (TD-DFT). The ground-state geometries of all the dinucleoside phosphate cation radicals considered, in their base stacked conformation, were optimized with the B3LYP/6-31G(d) method. Further, to take into account the effect of the aqueous environment surrounding the dinucleoside phosphates, the polarized continuum model (PCM) was considered and the excitation energies were computed by using the TD-B3LYP/6-31G(d) method. From this study, we find that the first transition in all the dinucleoside molecules involves hole transfer from base to base. dG*+pdG and dApdA*+ were found to have substantially lower first transition energies than others with two different DNA bases. Higher energy transitions involve base to sugar as well as base to base hole transfer. The calculated TD-B3LYP/6-31G(d) transition energies are in good agreement with previous calculations with CASSCF/CAS-PT2 level of theory. This TD-DFT work supports the experimental findings that sugar radicals formed upon photoexcitation of G*+ in gamma-irradiated DNA and suggests an explanation for the wavelength dependence found.
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Kokkin DL, Schmidt TW. On the Electronic Properties of Dehydrogenated Polycyclic Aromatic Hydrocarbons. J Phys Chem A 2006; 110:6173-7. [PMID: 16671689 DOI: 10.1021/jp057441v] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The electronic excited-state properties of a series of dehydrogenated polycyclic aromatic hydrocarbons from phenyl through to decacyl are reported. The radicals were investigated by use of time-dependent density functional theory in conjunction with the B3LYP functional. The pi and n orbitals were seen to converge in energy as the system increased in size, yet all radicals were found to have A' ground states. In addition to the study of the electronic state symmetries, the excited-state transitions and oscillator strengths were investigated with the resulting transitions found within the visible region of the spectrum, placing these radicals in the large group of candidate carriers of the diffuse interstellar bands.
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Affiliation(s)
- Damian L Kokkin
- School of Chemistry, University of Sydney, NSW 2006, Australia
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Van-Oanh NT, Désesquelles P, Douin S, Bréchignac P. Photofragmentation of the Fluorene Cation: I. New Experimental Procedure Using Sequential Multiphoton Absorption. J Phys Chem A 2006; 110:5592-8. [PMID: 16640351 DOI: 10.1021/jp057164s] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The hydrogen-loss channel, induced by sequential multiphoton absorption, of the vapor-phase fluorene cation was investigated using a supersonic molecular beam and a time-of-flight mass spectrometer. The fluorene cation was prepared by resonantly enhanced multiphoton ionization. The ultimate goal of this experiment is the determination of the evolution of the dissociation rate constant in a wide energy range. In this paper, we give a description of the original experimental procedure, show that the absorption process is non-Poissonian, and determine the absolute photon absorption cross section.
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Affiliation(s)
- Nguyen-Thi Van-Oanh
- Laboratoire de Photophysique Moléculaire, CNRS, Fédération de Recherche Lumière Matière, Bât 210, Université Paris-Sud XI, Orsay, France.
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Ayala I, Perry JJP, Szczepanski J, Tainer JA, Vala MT, Nick HS, Silverman DN. Hydrogen bonding in human manganese superoxide dismutase containing 3-fluorotyrosine. Biophys J 2005; 89:4171-9. [PMID: 16150974 PMCID: PMC1366982 DOI: 10.1529/biophysj.105.060616] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Incorporation of 3-fluorotyrosine and site-specific mutagenesis has been utilized with Fourier transform infrared (FTIR) spectroscopy and x-ray crystallography to elucidate active-site structure and the role of an active-site residue Tyr34 in human manganese superoxide dismutase (MnSOD). Calculated harmonic frequencies at the B3LYP/6-31G** level of theory for L-tyrosine and its 3-fluorine substituted analog are compared to experimental frequencies for vibrational mode assignments. Each of the nine tyrosine residues in each of the four subunits of the homotetramer of human MnSOD was replaced with 3-fluorotyrosine. The crystal structures of the unfluorinated and fluorinated wild-type MnSOD are nearly superimposable with the root mean-square deviation for 198 alpha-carbon atoms at 0.3 A. The FTIR data show distinct vibrational modes arising from 3-fluorotyrosine in MnSOD. Comparison of spectra for wild-type and Y34F MnSOD showed that the phenolic hydroxyl of Tyr34 is hydrogen bonded, acting as a proton donor in the active site. Comparison with crystal structures demonstrates that the hydroxyl of Tyr34 is a hydrogen bond donor to an adjacent water molecule; this confirms the participation of Tyr34 in a network of residues and water molecules that extends from the active site to the adjacent subunit.
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Affiliation(s)
- Idelisa Ayala
- Department of Pharmacology, University of Florida, Gainesville, Florida 32610, USA
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Wang H, Szczepanski J, Hirata S, Vala M. Vibrational and Electronic Absorption Spectroscopy of Dibenzo[b,def]chrysene and Its Ions. J Phys Chem A 2005; 109:9737-46. [PMID: 16833287 DOI: 10.1021/jp0527960] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The vibrational and electronic absorption spectra of dibenzo[b,def]chrysene (DBC) and its ions in argon matrixes have been recorded. Assignment of the observed infrared (IR) bands has been made by comparison with the density functional theory (DFT) computations of harmonic vibrational frequencies (with 6-31G(d,p) or 6-311+G(d,p) basis sets). Extensive time-dependent (TD) DFT calculations of vertical excitation energies have aided in the assignment of the experimental electronic absorption transitions. In general, the theoretical predictions are in good agreement with the observed ultraviolet and visible bands. By correlating IR and UV-visible band intensities (after UV photolysis), it has been shown that both DBC cations and anions are formed. The IR band intensity distributions of the DBC ions differ markedly from neutral DBC. A synthetic spectrum composed of neutral, cationic, and anionic DBC contributions compares reasonably well with the interstellar features of the "unidentified infrared" (UIR) bands from the reflection nebula NGC 7023. Finally, it is shown that the electronic absorption bands of the DBC ions lie in close proximity to several of the diffuse interstellar visible absorption bands (DIBs).
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Affiliation(s)
- Haiyan Wang
- Department of Chemistry and Center for Chemical Physics, University of Florida, Gainesville, Florida 32611-7200, USA
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Zeggari S, Lapouge C, Buntinx G, Poizat O. Theoretical and experimental resonance Raman study of the fluorene radical cation. Chem Phys 2005. [DOI: 10.1016/j.chemphys.2005.01.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Furche F, Rappoport D. Density Functional Methods for Excited States: Equilibrium Structure and Electronic Spectra. THEORETICAL AND COMPUTATIONAL CHEMISTRY 2005. [DOI: 10.1016/s1380-7323(05)80020-2] [Citation(s) in RCA: 167] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Grimme S, Izgorodina EI. Calculation of 0–0 excitation energies of organic molecules by CIS(D) quantum chemical methods. Chem Phys 2004. [DOI: 10.1016/j.chemphys.2004.06.050] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Lian-Cai X, Zun-Yun L, Tian-Jing H, Fan-Chen L, Dong-Ming C. Density functional theory studies of lithium porphyrin radicals. Chem Phys 2004. [DOI: 10.1016/j.chemphys.2004.06.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Banisaukas J, Szczepanski J, Vala M, Hirata S. Vibrational and Electronic Absorption Spectroscopy of 2,3-Benzofluorene and Its Cation. J Phys Chem A 2004. [DOI: 10.1021/jp031163n] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- John Banisaukas
- Department of Chemistry and Center for Chemical Physics, University of Florida, Gainesville, Florida 32611-7200
| | - Jan Szczepanski
- Department of Chemistry and Center for Chemical Physics, University of Florida, Gainesville, Florida 32611-7200
| | - Martin Vala
- Department of Chemistry and Center for Chemical Physics, University of Florida, Gainesville, Florida 32611-7200
| | - So Hirata
- William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352
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Rouille G, Krasnokutski S, Huisken F, Henning T, Sukhorukov O, Staicu A. Ultraviolet spectroscopy of pyrene in a supersonic jet and in liquid helium droplets. J Chem Phys 2004; 120:6028-34. [PMID: 15267485 DOI: 10.1063/1.1651476] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In a series of experiments devoted to the study of polycyclic aromatic hydrocarbons for astrophysical applications, the S(2)<--S(0) transition of jet-cooled pyrene (C(16)H(10)) at 321 nm has been studied by an absorption technique for the first time. The spectra observed by cavity ring-down spectroscopy closely resemble the excitation spectra obtained earlier by laser-induced fluorescence (LIF) and show the same band clusters arising from the vibronic interaction of S(2) with S(1). We have also investigated pyrene when it was incorporated into 380 mK cold helium droplets. These spectra which were recorded employing LIF and molecular beam depletion spectroscopy are broadened and redshifted by 0.94 nm but retain the essential features of the gas phase spectra.
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Affiliation(s)
- Gael Rouille
- Max-Planck-Institut fur Astronomie, Konigstuhl 17, D-69117 Heidelberg, Germany
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Liu X, Xu LC, He TJ, Chen DM, Liu FC. Density functional theory investigations of geometries and electronic spectra of lithium phthalocyanines. Chem Phys Lett 2003. [DOI: 10.1016/j.cplett.2003.08.065] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Hirata S, Head-Gordon M, Szczepanski J, Vala M. Time-Dependent Density Functional Study of the Electronic Excited States of Polycyclic Aromatic Hydrocarbon Radical Ions. J Phys Chem A 2003. [DOI: 10.1021/jp0301913] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- So Hirata
- William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352
| | - Martin Head-Gordon
- Department of Chemistry, University of California, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
| | - Jan Szczepanski
- Department of Chemistry and Center for Chemical Physics, University of Florida, Gainesville, Florida 32611-7200
| | - Martin Vala
- Department of Chemistry and Center for Chemical Physics, University of Florida, Gainesville, Florida 32611-7200
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Banisaukas J, Szczepanski J, Eyler J, Vala M, Hirata S, Head-Gordon M, Oomens J, Meijer G, von Helden G. Vibrational and Electronic Spectroscopy of Acenaphthylene and Its Cation. J Phys Chem A 2003. [DOI: 10.1021/jp0219754] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | - So Hirata
- William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352
| | - Martin Head-Gordon
- Department of Chemistry, University of California, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
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Szczepanski J, Banisaukas J, Vala M, Hirata S, Wiley WR. Preresonance Raman Spectrum of the C13H9 Fluorene-like Radical. J Phys Chem A 2002. [DOI: 10.1021/jp020827a] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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