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Shusterman JM, Gutsev GL, López Peña HA, Ramachandran BR, Tibbetts KM. Coulomb Explosion Dynamics of Multiply Charged para-Nitrotoluene Cations. J Phys Chem A 2022; 126:6617-6627. [PMID: 36126364 DOI: 10.1021/acs.jpca.2c04395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work explores Coulomb explosion (CE) dissociation pathways in multiply charged cations of para-nitrotoluene (PNT), a model compound for nitroaromatic energetic molecules. Experiments using strong-field ionization and mass spectrometry indicate that metastable cations PNT2+ and PNT3+ undergo CE to produce NO2+ and NO+. The experimentally measured kinetic energy release from CE upon formation of NO2+ and NO+ agrees qualitatively with the kinetic energy release predicted by computations of the reaction pathways in PNT2+ and PNT3+ using density functional theory (DFT). Both DFT computations and mass spectrometry identified additional products from CE of highly charged PNTq+ cations with q > 3. The dynamical timescales required for direct CE of PNT2+ and PNT3+ to produce NO2+ were estimated to be 200 and 90 fs, respectively, using ultrafast disruptive probing measurements.
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Affiliation(s)
- Jacob M Shusterman
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Gennady L Gutsev
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, United States
| | - Hugo A López Peña
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - B Ramu Ramachandran
- Institute for Micromanufacturing, Louisiana Tech University, Ruston, Louisiana 71272, United States
| | - Katharine Moore Tibbetts
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
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2
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Delgado-Granados LH, Arango CA, López JG. Preparation of vibrational quasi-bound states of the transition state complex BrHBr from the bihalide ion BrHBr . Phys Chem Chem Phys 2022; 24:21250-21260. [PMID: 36040431 DOI: 10.1039/d2cp03120e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient strategies that allow the preparation of molecular systems in particular vibrational states are important in the application of quantum control schemes to chemical reactions. In this paper, we propose the preparation of quasi-bound vibrational states of the collinear transition state complex BrHBr, from vibrational states of the bihalide ion BrHBr-, that favor the bond selective breakage of BrHBr. The results shown complement the investigation that we reported in a previous paper, [A. J. Garzón-Ramírez, J. G. López and C. A. Arango, Int. J. Quantum Chem., 2018, 24, e25784], in which we demonstrated the feasibility of controlling the bond selective decomposition of the collinear BrHBr using linear combinations of reactive resonances. We employed a dipole moment surface, calculated at the QCISD/d-aug-cc-pVTZ level of theory, to simulate the interaction of the BrHBr- ground vibrational state with heuristically optimized sequences of ultrashort infrared linear chirped laser pulses to achieve a target vibrational state, resulting from expanding a chosen linear combination of reactive resonances of BrHBr in terms of vibrational eigenstates of BrHBr-. The results of our simulations show final states that capture the most relevant features of the target state with different levels of description depending on the sequence of laser pulses employed. We also discuss ways of improving the description of the target state and possible limitations of our approach.
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Affiliation(s)
| | - Carlos A Arango
- Departamento de Ciencias Químicas, Universidad Icesi, Cali, Colombia
| | - José G López
- Departamento de Química, Universidad del Valle, A.A. 25360, Cali, Colombia.
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3
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López Peña HA, Shusterman JM, Ampadu Boateng D, Lao KU, Tibbetts KM. Coherent Control of Molecular Dissociation by Selective Excitation of Nuclear Wave Packets. Front Chem 2022; 10:859095. [PMID: 35449589 PMCID: PMC9016217 DOI: 10.3389/fchem.2022.859095] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 03/18/2022] [Indexed: 11/20/2022] Open
Abstract
We report on pump-probe control schemes to manipulate fragmentation product yields in p-nitrotoluene (PNT) cation. Strong field ionization of PNT prepares the parent cation in the ground electronic state, with coherent vibrational excitation along two normal modes: the C–C–N–O torsional mode at 80 cm−1 and the in-plane ring-stretching mode at 650 cm−1. Both vibrational wave packets are observed as oscillations in parent and fragment ion yields in the mass spectrum upon optical excitation. Excitation with 650 nm selectively fragments the PNT cation into C7H7+, whereas excitation with 400 nm selectively produces C5H5+ and C3H3+. In both cases the ion yield oscillations result from torsional wave packet excitation, but 650 and 400 nm excitation produce oscillations with opposite phases. Ab initio calculations of the ground and excited electronic potential energy surfaces of PNT cation along the C–C–N–O dihedral angle reveal that 400 nm excitation accesses an allowed transition from D0 to D6 at 0° dihedral angle, whereas 650 nm excitation accesses a strongly allowed transition from D0 to D4 at a dihedral angle of 90°. This ability to access different electronic excited states at different locations along the potential energy surface accounts for the selective fragmentation observed with different probe wavelengths. The ring-stretching mode, only observed using 800 nm excitation, is attributed to a D0 to D2 transition at a geometry with 90° dihedral angle and elongated C–N bond length. Collectively, these results demonstrate that strong field ionization induces multimode coherent excitation and that the vibrational wave packets can be excited with specific photon energies at different points on their potential energy surfaces to induce selective fragmentation.
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4
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Matsuda A, Tani K, Takeuchi Y, Hayakawa Y, Hishikawa A. Association Reaction of Gaseous C 2H 4 in Femtosecond Laser Filaments Studied by Time-of-Flight Mass Spectrometry. ACS OMEGA 2021; 6:29862-29868. [PMID: 34778659 PMCID: PMC8582076 DOI: 10.1021/acsomega.1c04354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Association reactions by femtosecond laser filamentation in gaseous C2H4 were studied by time-of-flight mass spectrometry of neutral reaction products. Direct sampling from the reaction cell to a mass spectrometer via a differential pumping stage allowed the identification of various hydrocarbon molecules C n H m with n = 3-7 and m = 4-7, which includes species not observed in the previous studies. It was found that products containing three and four carbon atoms dominate the mass spectrum with smaller yields for higher-mass species, suggesting that carbon chain growth proceeds through the reaction with C2H4 in the reaction cell. The product distribution showed a clear dependence on the laser pulse energy for filamentation.
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Affiliation(s)
- Akitaka Matsuda
- Department
of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
| | - Kentaro Tani
- Department
of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
| | - Yukari Takeuchi
- Department
of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
| | - Yui Hayakawa
- Department
of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
| | - Akiyoshi Hishikawa
- Department
of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
- Research
Center for Materials Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
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5
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6
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Das R, Pandey DK, Nimma V, P M, Bhardwaj P, Chandravanshi P, Shameem K M M, Singh DK, Kushawaha RK. Strong-field ionization of polyatomic molecules: ultrafast H atom migration and bond formation in the photodissociation of CH 3OH. Faraday Discuss 2021; 228:432-450. [PMID: 33576353 DOI: 10.1039/d0fd00129e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Strong-field ionization induces various complex phenomena like bond breaking, intramolecular hydrogen migration, and bond association in polyatomic molecules. The H-atom migration and bond formation in CH3OH induced by intense femtosecond laser pulses are investigated using a Velocity Map Imaging (VMI) spectrometer. Various laser parameters like intensity (1.5 × 1013 W cm-2-12.5 × 1013 W cm-2), pulse duration (29 fs and 195 fs), wavelength (800 nm and 1300 nm), and polarization (linear and circular) can serve as a quantum control for hydrogen migration and the yield of Hn+ (n = 1-3) ions which have been observed in this study. Further, in order to understand the ejection mechanism of the hydrogen molecular ions H2+ and H3+ from singly-ionized CH3OH, quantum chemical calculations were employed. The dissociation processes of CH3OH+ occurring by four dissociative channels to form CHO+ + H3, H3+ + CHO, CH2+ + H2O, and H2O+ + CH2 are studied. Using the combined approach of experiments and theory, we have successfully explained the mechanism of intramolecular hydrogen migration and predicted the dissociative channels of singly-ionized CH3OH.
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Affiliation(s)
- Rituparna Das
- Physical Research Laboratory, Ahmedabad, India. and Indian Institute of Technology, Gandhinagar, Gujarat 382355, India
| | - Deepak K Pandey
- Department of Physics, Institute of Infrastructure Technology Research and Management, Ahmedabad, 380026, India
| | | | - Madhusudhan P
- Physical Research Laboratory, Ahmedabad, India. and Indian Institute of Technology, Gandhinagar, Gujarat 382355, India
| | - Pranav Bhardwaj
- Physical Research Laboratory, Ahmedabad, India. and Indian Institute of Technology, Gandhinagar, Gujarat 382355, India
| | | | | | - Dheeraj K Singh
- Department of Physics, Institute of Infrastructure Technology Research and Management, Ahmedabad, 380026, India
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Stamm J, Benel J, Escoto E, Steinmeyer G, Dantus M. Milliradian precision ultrafast pulse control for spectral phase metrology. OPTICS EXPRESS 2021; 29:14314-14325. [PMID: 33985154 DOI: 10.1364/oe.422739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 04/13/2021] [Indexed: 06/12/2023]
Abstract
A pulse-shaper-based method for spectral phase measurement and compression with milliradian precision is proposed and tested experimentally. Measurements of chirp and third-order dispersion are performed and compared to theoretical predictions. The single-digit milliradian accuracy is benchmarked by a group velocity dispersion measurement of fused silica.
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Iwamoto N, Schwartz CJ, Jochim B, Raju P K, Feizollah P, Napierala JL, Severt T, Tegegn SN, Solomon A, Zhao S, Lam H, Wangjam TN, Kumarappan V, Carnes KD, Ben-Itzhak I, Wells E. Strong-field control of H 3 + production from methanol dications: Selecting between local and extended formation mechanisms. J Chem Phys 2020; 152:054302. [PMID: 32035476 DOI: 10.1063/1.5129946] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Using the CD3OH isotopologue of methanol, the ratio of D2H+ to D3 + formation is manipulated by changing the characteristics of the intense femtosecond laser pulse. Detection of D2H+ indicates a formation process involving two hydrogen atoms from the methyl side of the molecule and a proton from the hydroxyl side, while detection of D3 + indicates local formation involving only the methyl group. Both mechanisms are thought to involve a neutral D2 moiety. An adaptive control strategy that employs image-based feedback to guide the learning algorithm results in an enhancement of the D2H+/D3 + ratio by a factor of approximately two. The optimized pulses have secondary structures 110-210 fs after the main pulse and result in photofragments that have different kinetic energy release distributions than those produced from near transform limited pulses. Systematic changes to the linear chirp and higher order dispersion terms of the laser pulse are compared to the results obtained with the optimized pulse shapes.
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Affiliation(s)
- Naoki Iwamoto
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - Charles J Schwartz
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - Bethany Jochim
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - Kanaka Raju P
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - Peyman Feizollah
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - J L Napierala
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - T Severt
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - S N Tegegn
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - A Solomon
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - S Zhao
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - Huynh Lam
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - Tomthin Nganba Wangjam
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - V Kumarappan
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - K D Carnes
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - I Ben-Itzhak
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - E Wells
- Department of Physics, Augustana University, Sioux Falls, South Dakota 57197, USA
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9
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Ampadu Boateng D, Word MD, Gutsev LG, Jena P, Tibbetts KM. Conserved Vibrational Coherence in the Ultrafast Rearrangement of 2-Nitrotoluene Radical Cation. J Phys Chem A 2019; 123:1140-1152. [DOI: 10.1021/acs.jpca.8b11723] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Derrick Ampadu Boateng
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Mi’Kayla D. Word
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Lavrenty G. Gutsev
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Puru Jena
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Katharine Moore Tibbetts
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
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10
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Blasing DB, Pérez-Ríos J, Yan Y, Dutta S, Li CH, Zhou Q, Chen YP. Observation of Quantum Interference and Coherent Control in a Photochemical Reaction. PHYSICAL REVIEW LETTERS 2018; 121:073202. [PMID: 30169056 DOI: 10.1103/physrevlett.121.073202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Indexed: 06/08/2023]
Abstract
Coherent control of reactants remains a long-standing challenge in quantum chemistry. In particular, we have studied laser-induced molecular formation (photoassociation) in a Raman-dressed spin-orbit-coupled ^{87}Rb Bose-Einstein condensate, whose spin quantum state is a superposition of multiple bare spin components. In contrast to the notably different photoassociation-induced fractional atom losses observed for the bare spin components of a statistical mixture, a superposition state with a comparable spin composition displays the same fractional loss on every spin component. We interpret this as the superposition state itself undergoing photoassociation. For superposition states induced by a large Raman coupling and zero Raman detuning, we observe a nearly complete suppression of the photoassociation rate. This suppression is consistent with a model based upon quantum destructive interference between two photoassociation pathways for colliding atoms with different spin combinations. This model also explains the measured dependence of the photoassociation rate on the Raman detuning at a moderate Raman coupling. Our work thus suggests that preparing atoms in quantum superpositions may represent a powerful new technique to coherently control photochemical reactions.
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Affiliation(s)
- David B Blasing
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - Jesús Pérez-Ríos
- School of Materials Sciences and Technology, Universidad del Turabo, Gurabo, Puerto Rico 00778, USA
| | - Yangqian Yan
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
| | - Sourav Dutta
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
- Department of Physics, Indian Institute of Science Education and Research, Bhopal 462066, India
| | - Chuan-Hsun Li
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA
| | - Qi Zhou
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
- Purdue Quantum Center, Purdue University, West Lafayette, Indiana 47907, USA
| | - Yong P Chen
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA
- Purdue Quantum Center, Purdue University, West Lafayette, Indiana 47907, USA
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11
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Brühl E, Buckup T, Motzkus M. Experimental and numerical investigation of a phase-only control mechanism in the linear intensity regime. J Chem Phys 2018; 148:214310. [DOI: 10.1063/1.5029805] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Elisabeth Brühl
- Physikalisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Tiago Buckup
- Physikalisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Marcus Motzkus
- Physikalisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, D-69120 Heidelberg, Germany
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12
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Ampadu Boateng D, Gutsev GL, Jena P, Tibbetts KM. Dissociation dynamics of 3- and 4-nitrotoluene radical cations: Coherently driven C–NO2bond homolysis. J Chem Phys 2018; 148:134305. [DOI: 10.1063/1.5024892] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Derrick Ampadu Boateng
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, USA
| | - Gennady L. Gutsev
- Department of Physics, Florida A&M University, Tallahassee, Florida 32307, USA
| | - Puru Jena
- Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, USA
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13
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Yatsuhashi T, Nakashima N. Multiple ionization and Coulomb explosion of molecules, molecular complexes, clusters and solid surfaces. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2018. [DOI: 10.1016/j.jphotochemrev.2017.12.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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14
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Chang BY, Shin S, Engel V, Sola IR. Geometrical Optimization Approach to Isomerization: Models and Limitations. J Phys Chem A 2017; 121:8280-8287. [DOI: 10.1021/acs.jpca.7b08767] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bo Y. Chang
- School
of Chemistry (BK21), Seoul National University, Seoul 08826, Republic of Korea
| | - Seokmin Shin
- School
of Chemistry (BK21), Seoul National University, Seoul 08826, Republic of Korea
| | - Volker Engel
- Institut
für Physikalische und Theoretische Chemie, Universität Würzburg, 97074 Würzburg, Germany
| | - Ignacio R. Sola
- Departamento
de Química Física I, Universidad Complutense, 28040 Madrid, Spain
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15
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Gutsev GL, Ampadu Boateng D, Jena P, Tibbetts KM. A Theoretical and Mass Spectrometry Study of Dimethyl Methylphosphonate: New Isomers and Cation Decay Channels in an Intense Femtosecond Laser Field. J Phys Chem A 2017; 121:8414-8424. [PMID: 29035556 DOI: 10.1021/acs.jpca.7b08889] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Using both mass spectrometry with intense femtosecond laser ionization and high-level computational methods, we have explored the structure and fragmentation patterns of dimethyl methylphosphonate (DMMP) cation. Extensive search of the geometries of both neutral and positively charged DMMP yields new isomers that are appreciably lower in total energy than those commonly synthesized using the Michaelis-Arbuzov reaction. The stability of the standard isomer with CH3PO(OCH3)2 topology is found to be due to the presence of high barriers to isomer interconversion that involves several transition states. Our femtosecond laser ionization experiments show that the relative yields of the major dissociation products as a function of peak laser intensity correlate well with the theoretical estimates for the energies of the DMMP+ decay via various channels. In contrast, the peak laser intensities required for observation of minor dissociation products exhibit no correlation with the computed decay energies, which suggests that barrier heights and/or excited electronic states of DMMP+ determine its preferred fragmentation pathways in an intense femtosecond laser field.
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Affiliation(s)
- G L Gutsev
- Department of Physics, Florida A&M University , Tallahassee, Florida 32307, United States
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16
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Matsuda A, Hayashi T, Kitaura R, Hishikawa A. Femtosecond Laser Filamentation in Gaseous Ethylene: Formation of Hydrogenated Amorphous Carbon. CHEM LETT 2017. [DOI: 10.1246/cl.170613] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Akitaka Matsuda
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602
| | - Takahiro Hayashi
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602
| | - Ryo Kitaura
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602
| | - Akiyoshi Hishikawa
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602
- Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602
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17
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Adaptive Control of Ion Yield in Femtosecond Laser Post-ionization for Secondary Ion Mass Spectrometry. Sci Rep 2017; 7:5953. [PMID: 28729560 PMCID: PMC5519762 DOI: 10.1038/s41598-017-06562-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 06/13/2017] [Indexed: 11/26/2022] Open
Abstract
Secondary ion mass spectrometry is an excellent technique of analytical chemistry, where primary ions sputter a solid sample generating the secondary ions which are determined. Although the ion yield is inherently low, it can be enhanced by using a post-ionization of sputtered neutral species. Our novel approach integrates this technique with a near infrared femtosecond laser post-ionization based on an adaptive control through a laser pulse shaper. The shaping of the laser pulse provides adaptive control to select a mass peak of interest and to enhance this peak intensity. Versatility is confirmed by optimizing the ion yield for different molecules (tryptophan, anthracene, polyethylene, and oxalic acid) with focus on parent ion enhancement, fragmentation process, sublimation effect, and excited secondary species. This proof-of-concept experiment provides not only a nonspecific increase of the overall ion yield, but also the selection of specific secondary species and the adaptive enhancement of their intensities on the order of 100, potentially simplifying data interpretation. Such tailored spectra might advance the (secondary ion) mass spectrometry to new capabilities.
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18
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Ekanayake N, Nairat M, Kaderiya B, Feizollah P, Jochim B, Severt T, Berry B, Pandiri KR, Carnes KD, Pathak S, Rolles D, Rudenko A, Ben-Itzhak I, Mancuso CA, Fales BS, Jackson JE, Levine BG, Dantus M. Mechanisms and time-resolved dynamics for trihydrogen cation (H 3+) formation from organic molecules in strong laser fields. Sci Rep 2017; 7:4703. [PMID: 28680157 PMCID: PMC5498647 DOI: 10.1038/s41598-017-04666-w] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 05/18/2017] [Indexed: 11/09/2022] Open
Abstract
Strong-field laser-matter interactions often lead to exotic chemical reactions. Trihydrogen cation formation from organic molecules is one such case that requires multiple bonds to break and form. We present evidence for the existence of two different reaction pathways for H3+ formation from organic molecules irradiated by a strong-field laser. Assignment of the two pathways was accomplished through analysis of femtosecond time-resolved strong-field ionization and photoion-photoion coincidence measurements carried out on methanol isotopomers, ethylene glycol, and acetone. Ab initio molecular dynamics simulations suggest the formation occurs via two steps: the initial formation of a neutral hydrogen molecule, followed by the abstraction of a proton from the remaining CHOH2+ fragment by the roaming H2 molecule. This reaction has similarities to the H2 + H2+ mechanism leading to formation of H3+ in the universe. These exotic chemical reaction mechanisms, involving roaming H2 molecules, are found to occur in the ~100 fs timescale. Roaming molecule reactions may help to explain unlikely chemical processes, involving dissociation and formation of multiple chemical bonds, occurring under strong laser fields.
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Affiliation(s)
- Nagitha Ekanayake
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA
| | - Muath Nairat
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA
| | - Balram Kaderiya
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Peyman Feizollah
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Bethany Jochim
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Travis Severt
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Ben Berry
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Kanaka Raju Pandiri
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Kevin D Carnes
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Shashank Pathak
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Daniel Rolles
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Artem Rudenko
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Itzik Ben-Itzhak
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas, 66506, USA
| | - Christopher A Mancuso
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA
| | - B Scott Fales
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA
| | - James E Jackson
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA
| | - Benjamin G Levine
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA
| | - Marcos Dantus
- Department of Chemistry, Michigan State University, East Lansing, Michigan, 48824, USA. .,Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan, 48824, USA.
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19
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Nairat M, Lozovoy VV, Dantus M. Order of Magnitude Dissociative Ionization Enhancement Observed for Pulses with High Order Dispersion. J Phys Chem A 2016; 120:8529-8536. [PMID: 27744700 DOI: 10.1021/acs.jpca.6b08659] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
While the interaction of atoms in strong fields is well understood, the same cannot be said about molecules. We consider how dissociative ionization of molecules depends on the quality of the femtosecond laser pulses, in particular, the presence of third- and fourth-order dispersion. We find that high-order dispersion (HOD) unexpectedly results in order-of-magnitude enhanced ion yields, along with the factor of 3 greater kinetic energy release compared to transform-limited pulses with equal peak intensities. The magnitude of these effects is not caused by increased pulse duration. We evaluate the role of pulse pedestals produced by HOD and other pulse shaping approaches, for a number of molecules including acetylene, methanol, methylene chloride, acetonitrile, toluene, and o-nitrotoluene, and discuss our findings in terms of processes such as prealignment, preionization, and bond softening. We conclude, based on the quasi-symmetric temporal dependence of the observed enhancements that cascade ionization is likely responsible for the large accumulation of charge prior to the ejection of energetic fragments along the laser polarization axis.
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Affiliation(s)
- Muath Nairat
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
| | - Vadim V Lozovoy
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States
| | - Marcos Dantus
- Department of Chemistry, Michigan State University , East Lansing, Michigan 48824, United States.,Department of Physics and Astronomy, Michigan State University , East Lansing, Michigan 48824, United States
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20
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Fanood MMR, Ram NB, Lehmann CS, Powis I, Janssen MHM. Enantiomer-specific analysis of multi-component mixtures by correlated electron imaging-ion mass spectrometry. Nat Commun 2015; 6:7511. [PMID: 26104140 PMCID: PMC4491818 DOI: 10.1038/ncomms8511] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 05/14/2015] [Indexed: 11/09/2022] Open
Abstract
Simultaneous, enantiomer-specific identification of chiral molecules in multi-component mixtures is extremely challenging. Many established techniques for single-component analysis fail to provide selectivity in multi-component mixtures and lack sensitivity for dilute samples. Here we show how enantiomers may be differentiated by mass-selected photoelectron circular dichroism using an electron-ion coincidence imaging spectrometer. As proof of concept, vapours containing ∼1% of two chiral monoterpene molecules, limonene and camphor, are irradiated by a circularly polarized femtosecond laser, resulting in multiphoton near-threshold ionization with little molecular fragmentation. Large chiral asymmetries (2-4%) are observed in the mass-tagged photoelectron angular distributions. These asymmetries switch sign according to the handedness (R- or S-) of the enantiomer in the mixture and scale with enantiomeric excess of a component. The results demonstrate that mass spectrometric identification of mixtures of chiral molecules and quantitative determination of enantiomeric excess can be achieved in a table-top instrument.
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Affiliation(s)
- Mohammad M Rafiee Fanood
- LaserLaB Amsterdam and Department of Physics and Astronomy, VU University Amsterdam, De Boelelaan 1081, Amsterdam 1081 HV, The Netherlands
| | - N Bhargava Ram
- LaserLaB Amsterdam and Department of Physics and Astronomy, VU University Amsterdam, De Boelelaan 1081, Amsterdam 1081 HV, The Netherlands
| | - C Stefan Lehmann
- LaserLaB Amsterdam and Department of Physics and Astronomy, VU University Amsterdam, De Boelelaan 1081, Amsterdam 1081 HV, The Netherlands
| | - Ivan Powis
- School of Chemistry, University Park, University of Nottingham, Nottingham NG7 2RD, UK
| | - Maurice H M Janssen
- LaserLaB Amsterdam and Department of Physics and Astronomy, VU University Amsterdam, De Boelelaan 1081, Amsterdam 1081 HV, The Netherlands
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21
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Solá IR, González-Vázquez J, de Nalda R, Bañares L. Strong field laser control of photochemistry. Phys Chem Chem Phys 2015; 17:13183-200. [PMID: 25835746 DOI: 10.1039/c5cp00627a] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Strong ultrashort laser pulses have opened new avenues for the manipulation of photochemical processes like photoisomerization or photodissociation. The presence of light intense enough to reshape the potential energy surfaces may steer the dynamics of both electrons and nuclei in new directions. A controlled laser pulse, precisely defined in terms of spectrum, time and intensity, is the essential tool in this type of approach to control chemical dynamics at a microscopic level. In this Perspective we examine the current strategies developed to achieve control of chemical processes with strong laser fields, as well as recent experimental advances that demonstrate that properties like the molecular absorption spectrum, the state lifetimes, the quantum yields and the velocity distributions in photodissociation processes can be controlled by the introduction of carefully designed strong laser fields.
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Affiliation(s)
- Ignacio R Solá
- Departamento de Química Física I (Unidad Asociada de I+D+i al CSIC), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain.
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22
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Serrano J, Moros J, Laserna JJ. Sensing Signatures Mediated by Chemical Structure of Molecular Solids in Laser-Induced Plasmas. Anal Chem 2015; 87:2794-801. [DOI: 10.1021/acs.analchem.5b00212] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jorge Serrano
- Universidad de Málaga, Departamento de Química Analítica, 29071 Málaga, España
| | - Javier Moros
- Universidad de Málaga, Departamento de Química Analítica, 29071 Málaga, España
| | - J. Javier Laserna
- Universidad de Málaga, Departamento de Química Analítica, 29071 Málaga, España
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23
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Hydrogen Migration in Intense Laser Fields: Analysis and Control in Concert. SPRINGER SERIES IN CHEMICAL PHYSICS 2015. [DOI: 10.1007/978-3-319-06731-5_1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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24
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Konar A, Shu Y, Lozovoy VV, Jackson JE, Levine BG, Dantus M. Polyatomic molecules under intense femtosecond laser irradiation. J Phys Chem A 2014; 118:11433-50. [PMID: 25314590 DOI: 10.1021/jp505498t] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Interaction of intense laser pulses with atoms and molecules is at the forefront of atomic, molecular, and optical physics. It is the gateway to powerful new tools that include above threshold ionization, high harmonic generation, electron diffraction, molecular tomography, and attosecond pulse generation. Intense laser pulses are ideal for probing and manipulating chemical bonding. Though the behavior of atoms in strong fields has been well studied, molecules under intense fields are not as well understood and current models have failed in certain important aspects. Molecules, as opposed to atoms, present confounding possibilities of nuclear and electronic motion upon excitation. The dynamics and fragmentation patterns in response to the laser field are structure sensitive; therefore, a molecule cannot simply be treated as a "bag of atoms" during field induced ionization. In this article we present a set of experiments and theoretical calculations exploring the behavior of a large collection of aryl alkyl ketones when irradiated with intense femtosecond pulses. Specifically, we consider to what extent molecules retain their molecular identity and properties under strong laser fields. Using time-of-flight mass spectrometry in conjunction with pump-probe techniques we study the dynamical behavior of these molecules, monitoring ion yield modulation caused by intramolecular motions post ionization. The set of molecules studied is further divided into smaller sets, sorted by type and position of functional groups. The pump-probe time-delay scans show that among positional isomers the variations in relative energies, which amount to only a few hundred millielectronvolts, influence the dynamical behavior of the molecules despite their having experienced such high fields (V/Å). High level ab initio quantum chemical calculations were performed to predict molecular dynamics along with single and multiphoton resonances in the neutral and ionic states. We propose the following model of strong-field ionization and subsequent fragmentation for polyatomic molecules: Single electron ionization occurs on a suboptical cycle time scale, and the electron carries away essentially all of the energy, leaving behind little internal energy in the cation. Subsequent fragmentation of the cation takes place as a result of further photon absorption modulated by one- and two-photon resonances, which provide sufficient energy to overcome the dissociation energy. The proposed hypothesis implies the loss of a photoelectron at a rate that is faster than intramolecular vibrational relaxation and is consistent with the observation of nonergodic photofragmentation of polyatomic molecules as well as experimental results from many other research groups on different molecules and with different pulse durations and wavelengths.
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Affiliation(s)
- Arkaprabha Konar
- Department of Chemistry and ‡Department of Physics and Astronomy, Michigan State University , East Lansing, Michigan 48824, United States
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25
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Janssen MHM, Powis I. Detecting chirality in molecules by imaging photoelectron circular dichroism. Phys Chem Chem Phys 2014; 16:856-71. [DOI: 10.1039/c3cp53741b] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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26
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Duffy MJ, Kelly O, Calvert CR, King RB, Belshaw L, Kelly TJ, Costello JT, Timson DJ, Bryan WA, Kierspel T, Turcu ICE, Cacho CM, Springate E, Williams ID, Greenwood JB. Fragmentation of neutral amino acids and small peptides by intense, femtosecond laser pulses. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2013; 24:1366-1375. [PMID: 23817831 DOI: 10.1007/s13361-013-0653-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Revised: 04/15/2013] [Accepted: 04/16/2013] [Indexed: 06/02/2023]
Abstract
High power femtosecond laser pulses have unique properties that could lead to their application as ionization or activation sources in mass spectrometry. By concentrating many photons into pulse lengths approaching the timescales associated with atomic motion, very strong electric field strengths are generated, which can efficiently ionize and fragment molecules without the need for resonant absorption. However, the complex interaction between these pulses and biomolecular species is not well understood. To address this issue, we have studied the interaction of intense, femtosecond pulses with a number of amino acids and small peptides. Unlike previous studies, we have used neutral forms of these molecular targets, which allowed us to investigate dissociation of radical cations without the spectra being complicated by the action of mobile protons. We found fragmentation was dominated by fast, radical-initiated dissociation close to the charge site generated by the initial ionization or from subsequent ultrafast migration of this charge. Fragments with lower yields, which are useful for structural determinations, were also observed and attributed to radical migration caused by hydrogen atom transfer within the molecule.
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Affiliation(s)
- Martin J Duffy
- Centre for Plasma Physics, School of Mathematics and Physics, Queen's University Belfast, Belfast, UK
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27
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Moore Tibbetts K, Xing X, Rabitz H. Systematic Trends in Photonic Reagent Induced Reactions in a Homologous Chemical Family. J Phys Chem A 2013; 117:8205-15. [DOI: 10.1021/jp403824h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Xi Xing
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544,
United States
| | - Herschel Rabitz
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544,
United States
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28
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Shandilya BK, Sen S, Sahoo T, Talukder S, Chaudhury P, Adhikari S. Selective bond breaking mediated by state specific vibrational excitation in model HOD molecule through optimized femtosecond IR pulse: A simulated annealing based approach. J Chem Phys 2013; 139:034310. [DOI: 10.1063/1.4813127] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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29
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Karimi R, Bisson É, Wales B, Walles B, Beaulieu S, Giguère M, Long Z, Liu WK, Kieffer JC, Légaré F, Sanderson J. N2O ionization and dissociation dynamics in intense femtosecond laser radiation, probed by systematic pulse length variation from 7 to 500 fs. J Chem Phys 2013; 138:204311. [PMID: 23742479 DOI: 10.1063/1.4804653] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have made a series of measurements, as a function of pulse duration, of ionization and fragmentation of the asymmetric molecule N2O in intense femtosecond laser radiation. The pulse length was varied from 7 fs to 500 fs with intensity ranging from 4 × 10(15) to 2.5 × 10(14) W∕cm(2). Time and position sensitive detection allows us to observe all fragments in coincidence. By representing the final dissociation geometry with Dalitz plots, we can identify the underlying breakup dynamics. We observe for the first time that there are two stepwise dissociation pathways for N2O(3+): (1) N2O(3+) → N(+) + NO(2+) → N(+) + N(+) + O(+) and (2) N2O(3+) → N2 (2+) + O(+) → N(+) + N(+) + O(+) as well as one for N2O(4+) → N(2+) + NO(2+) → N(2+) + N(+) + O(+). The N2 (2+) stepwise channel is suppressed for longer pulse length, a phenomenon which we attribute to the influence which the structure of the 3+ potential has on the dissociating wave packet propagation. Finally, by observing the total kinetic energy released for each channel as a function of pulse duration, we show the increasing importance of charge resonance enhanced ionization for channels higher than 3+.
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Affiliation(s)
- Reza Karimi
- Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
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30
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Yan L, Cudry F, Li W, Suits AG. Isomer-Specific Mass Spectrometric Detection Via “Semisoft” Strong-Field Ionization. J Phys Chem A 2013; 117:11890-5. [DOI: 10.1021/jp403118c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Lu Yan
- Department of Chemistry, Wayne State University, Detroit Michigan
48202, United
States
| | - Fadia Cudry
- Department of Chemistry, Wayne State University, Detroit Michigan
48202, United
States
| | - Wen Li
- Department of Chemistry, Wayne State University, Detroit Michigan
48202, United
States
| | - Arthur G. Suits
- Department of Chemistry, Wayne State University, Detroit Michigan
48202, United
States
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31
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Goswami T, Das DK, Goswami D. Controlling the femtosecond laser-driven transformation of dicyclopentadiene into cyclopentadiene. Chem Phys Lett 2013; 558:1-7. [PMID: 24098059 PMCID: PMC3790071 DOI: 10.1016/j.cplett.2012.10.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Dynamics of the chemical transformation of dicyclopentadiene into cyclopentadiene in a supersonic molecular beam is elucidated using femtosecond time-resolved degenerate pump-probe mass spectrometry. Control of this ultrafast chemical reaction is achieved by using linearly chirped frequency modulated pulses. We show that negatively chirped femtosecond laser pulses enhance the cyclopentadiene photo-product yield by an order of magnitude as compared to that of the unmodulated or the positively chirped pulses. This demonstrates that the phase structure of femtosecond laser pulse plays an important role in determining the outcome of a chemical reaction.
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Affiliation(s)
| | - Dipak K. Das
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Debabrata Goswami
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
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32
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Schirmel N, Reusch N, Horsch P, Weitzel KM. Formation of fragment ions (H+, H3+, CH3+) from ethane in intense femtosecond laser fields – from understanding to control. Faraday Discuss 2013; 163:461-74; discussion 513-43. [DOI: 10.1039/c3fd20152j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Johansson JO, Campbell EEB. Probing excited electronic states and ionisation mechanisms of fullerenes. Chem Soc Rev 2013; 42:5661-71. [DOI: 10.1039/c3cs60047e] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Goswami T, Das DK, Kumar SKK, Goswami D. Chirp and polarization control of femtosecond molecular fragmentation. INDIAN JOURNAL OF PHYSICS AND PROCEEDINGS OF THE INDIAN ASSOCIATION FOR THE CULTIVATION OF SCIENCE (2004) 2012; 86:181-185. [PMID: 24115807 PMCID: PMC3792555 DOI: 10.1007/s12648-012-0039-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We explore the simultaneous effect of chirp and polarization as the two control parameters for non-resonant photo-dissociation of n-propyl benzene. Experiments performed over a wide range of laser intensities show that these two control knobs behave mutually exclusively. Specifically, for the coherently enhanced fragments (C3H3+, C5H5+) with negatively chirped pulses and C6H5+ with positively chirped pulses, polarization effect is the same as compared to that in the case of transform-limited pulses. Though a change in polarization affects the overall fragmentation efficiency, the fragmentation pattern of n-propyl benzene molecule remains unaffected in contrast to the chirp case.
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Affiliation(s)
- T Goswami
- Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, Uttar Pradesh, India
| | - D K Das
- Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, Uttar Pradesh, India
| | - S K Karthick Kumar
- Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, Uttar Pradesh, India
| | - D Goswami
- Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, Uttar Pradesh, India
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35
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Kalcic CL, Reid GE, Lozovoy VV, Dantus M. Mechanism elucidation for nonstochastic femtosecond laser-induced ionization/dissociation: from amino acids to peptides. J Phys Chem A 2012; 116:2764-74. [PMID: 22141398 DOI: 10.1021/jp208421d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Femtosecond laser-induced ionization/dissociation (fs-LID) has been demonstrated as a novel ion activation method for use in tandem mass spectrometry. The technique opens the door to unique structural information about biomolecular samples that is not easily accessed by traditional means. fs-LID is able to cleave strong bonds while keeping weaker bonds intact. This feature has been found to be particularly useful for the mapping of post-translational modifications such as phosphorylation, which is difficult to achieve by conventional proteomic studies. Here we investigate the laser-ion interaction on a fundamental level through the characterization of fs-LID spectra for the protonated amino acids and two series of derivatized samples. The findings are used to better understand the fs-LID spectra of synthetic peptides. This is accomplished by exploring the effects of several single-residue substitutions.
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Affiliation(s)
- Christine L Kalcic
- Departments of Chemistry, Michigan State University East Lansing, Michigan 48824, USA
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36
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du Plessis A, Strydom CA, Uys H, Botha LR. Laser induced and controlled chemical reaction of carbon monoxide and hydrogen. J Chem Phys 2011; 135:204303. [PMID: 22128931 DOI: 10.1063/1.3662129] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Bimolecular chemical reaction control of gaseous CO and H(2) at room temperature and atmospheric pressure, without any catalyst, using shaped femtosecond laser pulses is presented. High intensity laser radiation applied to a reaction cell facilitates non-resonant bond breakage and the formation of a range of ions, which can then react to form new products. Stable reaction products are measured after irradiation of a reaction cell, using time of flight mass spectroscopy. Bond formation of C-O, C-C, and C-H bonds is demonstrated as CO(2)(+), C(2)H(2)(+), CH(+), and CH(3)(+) were observed in the time of flight mass spectrum of the product gas, analyzed after irradiation. The formation of CO(2) is shown to be dependent on laser intensity, irradiation time, and on the presence of H(2) in the reaction cell. Using negatively chirped laser pulses more C-O bond formation takes place as compared to more C-C bond formation for unchirped pulses.
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37
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Kelly O, Duffy MJ, King RB, Belshaw L, Williams ID, Sá J, Calvert CR, Greenwood JB. Femtosecond lasers for mass spectrometry: proposed application to catalytic hydrogenation of butadiene. Analyst 2011; 137:64-9. [PMID: 22068546 DOI: 10.1039/c1an15706j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Mass spectra from the interaction of intense, femtosecond laser pulses with 1,3-butadiene, 1-butene, and n-butane have been obtained. The proportion of the fragment ions produced as a function of intensity, pulse length, and wavelength was investigated. Potential mass spectrometry applications, for example in the analysis of catalytic reaction products, are discussed.
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Affiliation(s)
- Orla Kelly
- Centre for Plasma Physics, School of Maths and Physics, Queen's University Belfast, Belfast, BT7 1NN, UK
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38
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Antoine R, Dugourd P. Visible and ultraviolet spectroscopy of gas phase protein ions. Phys Chem Chem Phys 2011; 13:16494-509. [PMID: 21811728 DOI: 10.1039/c1cp21531k] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Optical spectroscopy has contributed enormously to our knowledge of the structure and dynamics of atoms and molecules and is now emerging as a cornerstone of the gas phase methods available for investigating biomolecular ions. This article focuses on the UV and visible spectroscopy of peptide and protein ions stored in ion traps, with emphasis placed on recent results obtained on protein polyanions, by electron photodetachment experiments. We show that among a large number of possible de-excitation pathways, the relaxation of biomolecular polyanions is mainly achieved by electron emission following photo-excitation in electronically excited states. Electron photodetachment is a fast process that occurs prior to relaxation on vibrational degrees of freedom. Electron photodetachment yield can then be used to record gas phase action spectra for systems as large as entire proteins, without the limitation of system size that would arise from energy redistribution on numerous modes and prevent fragmentation after the absorption of a photon. The optical activity of proteins in the near UV is directly related to the electronic structure and optical absorption of aromatic amino acids (Trp, Phe and Tyr). UV spectra for peptides and proteins containing neutral, deprotonated and radical aromatic amino acids were recorded. They displayed strong bathochromic shifts. In particular, the results outline the privileged role played by open shell ions in molecular spectroscopy which, in the case of biomolecules, is directly related to their reactivity and biological functions. The optical shifts observed are sufficient to provide unambiguous fingerprints of the electronic structure of chromophores without the requirement of theoretical calculations. They constitute benchmarks for calculating the absorption spectra of chromophores embedded in entire proteins and could be used in the future to study biochemical processes in the gas phase involving charge transfer in aromatic amino acids, such as in the mediation of electron transfer or redox reactions. We then addressed the important question of the sensitivity of protein optical spectra to the intrinsic properties of protein ions, including conformation, charge state, etc., and to environmental factors. We report optical spectra for different charge states of insulin, for ubiquitin starting from native and denaturated solutions, and for apo-myoglobin protein. All these spectra are compared critically to spectra recorded in solution, in order to assess solvent effects. We also report the spectra of peptides complexed with metal cations and show that complexation gives rise to new optical transitions related to charge transfer types of excitation. The perspectives of this work include integrative approaches where UV-Vis spectroscopy could, for example, be combined with ion mobility spectrometry and high level calculations for protein structural characterization. It could also be used in spectroscopy to probe biological processes in the gas phase, with different light sources including VUV radiation (to probe different types of excitations) and ultra short pulses with time and phase modulation (to probe and control the dynamics of de-excitation or charge transfer events), and with the derivatization of proteins with chromophores to modulate their optical properties. We also envision that photo-excitation will play an important role in the future to produce intermediates with new chemical and reactive properties. Another promising route is to conduct activated electron photodetachment dissociation experiments.
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39
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Buryakov IA. Detection of explosives by ion mobility spectrometry. JOURNAL OF ANALYTICAL CHEMISTRY 2011. [DOI: 10.1134/s1061934811080077] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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40
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Roslund J, Shir OM, Dogariu A, Miles R, Rabitz H. Control of nitromethane photoionization efficiency with shaped femtosecond pulses. J Chem Phys 2011; 134:154301. [DOI: 10.1063/1.3576052] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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41
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Zhu X, Lozovoy VV, Shah JD, Dantus M. Photodissociation Dynamics of Acetophenone and Its Derivatives with Intense Nonresonant Femtosecond Pulses. J Phys Chem A 2011; 115:1305-12. [DOI: 10.1021/jp1029486] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xin Zhu
- Department of Chemistry and ‡Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, United States
| | - Vadim V. Lozovoy
- Department of Chemistry and ‡Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, United States
| | - Jay D. Shah
- Department of Chemistry and ‡Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, United States
| | - Marcos Dantus
- Department of Chemistry and ‡Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, United States
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Zhu X, Kalcic CL, Winkler N, Lozovoy VV, Dantus M. Applications of femtochemistry to proteomic and metabolomic analysis. J Phys Chem A 2011; 114:10380-7. [PMID: 20812733 DOI: 10.1021/jp1000732] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Femtosecond laser pulses have been widely used as a tool to study molecular ionization and fragmentation. This article bridges the application of femtosecond laser technology in early research focused on small isolated molecules with that in modern biological mass spectrometry for proteomics and metabolomic analysis on large (140+ atoms) biomolecules. The single-shot interaction of a femtosecond laser with neutral para-nitrotoluene (pNT) is investigated with time-of-flight mass spectrometry and compared with the ultrafast photodissociation of protonated pNT in an ion trap mass spectrometer accumulated over ∼1000 pulses. The ion trap experiment is then extended to longer biomolecules. As demonstrated in the examples of vasopressin and tomatine, this novel ion activation method provides greater sequence coverage and nonstatistical fragmentation, leading to valuable information complementary to conventional methods for structural analysis.
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Affiliation(s)
- Xin Zhu
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
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43
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Plenge J, Wirsing A, Wagner-Drebenstedt I, Halfpap I, Kieling B, Wassermann B, Rühl E. Coherent control of the ultrafast dissociative ionization dynamics of bromochloroalkanes. Phys Chem Chem Phys 2011; 13:8705-14. [DOI: 10.1039/c0cp02742a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- J Plenge
- Physikalische und Theoretische Chemie, Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany.
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44
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Stefan Lehmann C, Bhargava Ram N, Irimia D, Janssen MHM. Photoelectron photoion coincidence imaging of ultrafast control in multichannel molecular dynamics. Faraday Discuss 2011; 153:173-87; discussion 189-212. [DOI: 10.1039/c1fd00047k] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Frei F, Bloch R, Feurer T. Influence of finite spatial resolution on single- and double-pass femtosecond pulse shapers. OPTICS LETTERS 2010; 35:4072-4074. [PMID: 21124616 DOI: 10.1364/ol.35.004072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We investigate the influence of the finite spatial resolution of a typical 4f pulse-shaping setup in a single- and double-pass configuration on the shaped waveforms. Specifically, we calculate and measure the space-frequency distribution at the focal plane of a lens following the shaping setup and show that steep amplitude or phase jumps, as they appear with pixelated spatial light modulators, are affected by a finite spatial resolution.
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Affiliation(s)
- Franziska Frei
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland.
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46
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Wang B, Liu B, Wang Y, Wang L. Dynamics of Highly Excited Nitroaromatics. J Phys Chem A 2010; 114:12972-8. [DOI: 10.1021/jp104727p] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bingxing Wang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, China
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47
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Sarma M, Adhikari S, Mishra M. Laser assisted control of selective bond dissociation in HOD–some mechanistic insights. Mol Phys 2010. [DOI: 10.1080/00268970802708934] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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48
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Irimia D, Janssen MHM. Toward elucidating the mechanism of femtosecond pulse shaping control in photodynamics of molecules by velocity map photoelectron and ion imaging. J Chem Phys 2010; 132:234302. [DOI: 10.1063/1.3436720] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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49
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Comparative study of the dissociative ionization of 1,1,1-trichloroethane using nanosecond and femtosecond laser pulses. Int J Mol Sci 2010; 11:1114-40. [PMID: 20480004 PMCID: PMC2869235 DOI: 10.3390/ijms11031114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 02/25/2010] [Accepted: 02/26/2010] [Indexed: 11/22/2022] Open
Abstract
Changes in the laser induced molecular dissociation of 1,1,1-trichloroethane (TCE) were studied using a range of intensities and standard laser wavelengths with nanosecond and femtosecond pulse durations. TCE contains C-H, C-C and C-Cl bonds and selective bond breakage of one or more of these bonds is of scientific interest. Using laser ionization time of flight mass spectrometry, it was found that considerable variation of fragment ion peak heights as well as changes in relative peak ratios is possible by varying the laser intensity (by attenuation), wavelength and pulse duration using standard laser sources. The nanosecond laser dissociation seems to occur via C-Cl bond breakage, with significant fragmentation and only a few large mass ion peaks observed. In contrast, femtosecond laser dissociative ionization results in many large mass ion peaks. Evidence is found for various competing dissociation and ionization pathways. Variation of the nanosecond laser intensity does not change the fragmentation pattern, while at high femtosecond intensities large changes are observed in relative ion peak sizes. The total ionization yield and fragmentation ratios are presented for a range of wavelengths and intensities, and compared to the changes observed due to a linear chirp variation.
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50
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Coello Y, Jones AD, Gunaratne TC, Dantus M. Atmospheric Pressure Femtosecond Laser Imaging Mass Spectrometry. Anal Chem 2010; 82:2753-8. [PMID: 20210322 DOI: 10.1021/ac9026466] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Yves Coello
- Department of Chemistry, Department of Biochemistry and Molecular Biology, Department of Physics, Michigan State University, East Lansing, Michigan 48824, and BioPhotonic Solutions Inc., Okemos, Michigan 48864
| | - A. Daniel Jones
- Department of Chemistry, Department of Biochemistry and Molecular Biology, Department of Physics, Michigan State University, East Lansing, Michigan 48824, and BioPhotonic Solutions Inc., Okemos, Michigan 48864
| | - Tissa C. Gunaratne
- Department of Chemistry, Department of Biochemistry and Molecular Biology, Department of Physics, Michigan State University, East Lansing, Michigan 48824, and BioPhotonic Solutions Inc., Okemos, Michigan 48864
| | - Marcos Dantus
- Department of Chemistry, Department of Biochemistry and Molecular Biology, Department of Physics, Michigan State University, East Lansing, Michigan 48824, and BioPhotonic Solutions Inc., Okemos, Michigan 48864
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