1
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Li J, He X, Oguzie E, Peng C. Orbital mechanism of upright CO activation on Fe(100). SURF INTERFACE ANAL 2019. [DOI: 10.1002/sia.6678] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jibiao Li
- Chongqing Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology (EBEAM)Yangtze Normal University Chongqing China
- Department of PhysicsAlbaNova University Center, Stockholm University Stockholm Sweden
| | - Xin He
- School of Intelligent ManufacturingSichuan University of Arts and Science Dazhou China
| | - Emeka Oguzie
- Electrochemistry and Materials Science Research Laboratory, Department of ChemistryFederal University of Technology Owerri Nigeria
| | - Cheng Peng
- Chongqing Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology (EBEAM)Yangtze Normal University Chongqing China
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2
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Tsyganenko AA, Kompaniets TN, Novikov RG, Pestsov OS. Resonance laser-induced processes and energy transformations in adsorbed layers. Curr Opin Chem Eng 2019. [DOI: 10.1016/j.coche.2019.02.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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3
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Hu P, Li X, Li B, Han X, Zhang F, Chou KC, Chen Z, Lu X. Molecular Coupling between Organic Molecules and Metal. J Phys Chem Lett 2018; 9:5167-5172. [PMID: 30141630 DOI: 10.1021/acs.jpclett.8b01765] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Molecular couplings at interfaces play important roles in determining the performance of nanophotonics and molecular electronics. In this Letter, using femtosecond sum frequency generation to trace free-induction decay of vibrationally excited aromatic thiol molecules immobilized on metal with and without the bridged methylene group(s), metal surface free electron-coupled and uncoupled phenyl C-H stretching vibrational modes were identified, with dephasing times of ∼0.28 and ∼0.60 ps, respectively. For thiols on Au with the bridged methylene group(s) (benzyl mercaptan and phenylethanethiol), both the coupled and uncoupled modes were observed; for thiol on Au without the bridged methylene group (thiophenol), only the coupled mode was observed. This indicates that the bridged methylene group(s) serving as a spacer can be used to adjust the molecular coupling between the phenyl vibration and surface free electrons. The experimental approach can be used to tune molecular couplings in advanced nanophotonics and molecular electronics.
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Affiliation(s)
- Pengcheng Hu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , Nanjing 210096 , China
| | - Xu Li
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , Nanjing 210096 , China
| | - Bolin Li
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , Nanjing 210096 , China
| | - Xiaofeng Han
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , Nanjing 210096 , China
| | - Furong Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , Nanjing 210096 , China
| | - Keng C Chou
- Department of Chemistry , University of British Columbia , Vancouver , BC , Canada V6T 1Z1
| | - Zhan Chen
- Department of Chemistry , University of Michigan , 930 North University Avenue , Ann Arbor , Michigan 48109 , United States
| | - Xiaolin Lu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , Nanjing 210096 , China
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4
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Mu X, Lau JKC, Lai CK, Siu KWM, Hopkinson AC, Chu IK. Isomerization versus dissociation of phenylalanylglycyltryptophan radical cations. Phys Chem Chem Phys 2017. [PMID: 28631796 DOI: 10.1039/c7cp02355c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four isomers of the radical cation of tripeptide phenylalanylglycyltryptophan, in which the initial location of the radical center is well defined, have been isolated and their collision-induced dissociation (CID) spectra examined. These ions, the π-centered [FGWπ˙]+, α-carbon- [FGα˙W]+, N-centered [FGWN˙]+ and ζ-carbon- [Fζ˙GW]+ radical cations, were generated via collision-induced dissociation (CID) of transition metal-ligand-peptide complexes, side chain fragmentation of a π-centered radical cation, homolytic cleavage of a labile nitrogen-nitrogen single bond, and laser induced dissociation of an iodinated peptide, respectively. The π-centered and tryptophan N-centered peptide radical cations produced almost identical CID spectra, despite the different locations of their initial radical sites, which indicated that interconversion between the π-centered and tryptophan N-centered radical cations is facile. By contrast, the α-carbon-glycyl radical [FGα˙W]+, and ζ-phenyl radical [Fζ˙GW]+, featured different dissociation product ions, suggesting that the interconversions among α-carbon, π-centered (or tryptophan N-centered) and ζ-carbon-radical cations have higher barriers than those to dissociation. Density functional theory calculations have been used to perform systematic mechanistic investigations on the interconversions between these isomers and to study selected fragmentation pathways for these isomeric peptide radical cations. The results showed that the energy barrier for interconversion between [FGWπ˙]+ and [FGWN˙]+ is only 31.1 kcal mol-1, much lower than the barriers to their dissociation (40.3 kcal mol-1). For the [FGWπ˙]+, [FGα˙W]+, and [Fζ˙GW]+, the barriers to interconversion are higher than those to dissociation, suggesting that interconversions among these isomers are not competitive with dissociations. The [z3 - H]˙+ ions isolated from [FGα˙W]+ and [Fζ˙GW]+ show distinctly different fragmentation patterns, indicating that the structures of these ions are different and this result is supported by the DFT calculations.
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Affiliation(s)
- Xiaoyan Mu
- Department of Chemistry, The University of Hong Kong, Hong Kong, China.
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5
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Nihonyanagi S, Yamaguchi S, Tahara T. Ultrafast Dynamics at Water Interfaces Studied by Vibrational Sum Frequency Generation Spectroscopy. Chem Rev 2017; 117:10665-10693. [DOI: 10.1021/acs.chemrev.6b00728] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | - Shoichi Yamaguchi
- Department
of Applied Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan
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6
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LaRue JL, Katayama T, Lindenberg A, Fisher AS, Öström H, Nilsson A, Ogasawara H. THz-Pulse-Induced Selective Catalytic CO Oxidation on Ru. PHYSICAL REVIEW LETTERS 2015; 115:036103. [PMID: 26230806 DOI: 10.1103/physrevlett.115.036103] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Indexed: 05/19/2023]
Abstract
We demonstrate the use of intense, quasi-half-cycle THz pulses, with an associated electric field component comparable to intramolecular electric fields, to direct the reaction coordinate of a chemical reaction by stimulating the nuclear motions of the reactants. Using a strong electric field from a THz pulse generated via coherent transition radiation from an ultrashort electron bunch, we present evidence that CO oxidation on Ru(0001) is selectively induced, while not promoting the thermally induced CO desorption process. The reaction is initiated by the motion of the O atoms on the surface driven by the electric field component of the THz pulse, rather than thermal heating of the surface.
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Affiliation(s)
- Jerry L LaRue
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Tetsuo Katayama
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Aaron Lindenberg
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- SIMES Institute for Materials and Energy Science, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
| | - Alan S Fisher
- Accelerator Directorate, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Henrik Öström
- Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden
| | - Anders Nilsson
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden
| | - Hirohito Ogasawara
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- Stanford Synchrotron Radiation Lightsource (SSRL), SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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7
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Greif M, Nagy T, Soloviov M, Castiglioni L, Hengsberger M, Meuwly M, Osterwalder J. Following the molecular motion of near-resonant excited CO on Pt(111): A simulated x-ray photoelectron diffraction study based on molecular dynamics calculations. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2015; 2:035102. [PMID: 26798798 PMCID: PMC4711632 DOI: 10.1063/1.4922611] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 06/03/2015] [Indexed: 05/31/2023]
Abstract
A THz-pump and x-ray-probe experiment is simulated where x-ray photoelectron diffraction (XPD) patterns record the coherent vibrational motion of carbon monoxide molecules adsorbed on a Pt(111) surface. Using molecular dynamics simulations, the excitation of frustrated wagging-type motion of the CO molecules by a few-cycle pulse of 2 THz radiation is calculated. From the atomic coordinates, the time-resolved XPD patterns of the C 1s core level photoelectrons are generated. Due to the direct structural information in these data provided by the forward scattering maximum along the carbon-oxygen direction, the sequence of these patterns represents the equivalent of a molecular movie.
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Affiliation(s)
- Michael Greif
- Departement of Physics, University of Zürich , Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | | | - Maksym Soloviov
- Department of Chemistry, University of Basel , Klingelbergstrasse 80, CH-4056 Basel, Switzerland
| | - Luca Castiglioni
- Departement of Physics, University of Zürich , Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Matthias Hengsberger
- Departement of Physics, University of Zürich , Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Markus Meuwly
- Department of Chemistry, University of Basel , Klingelbergstrasse 80, CH-4056 Basel, Switzerland
| | - Jürg Osterwalder
- Departement of Physics, University of Zürich , Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
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8
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Matsumoto Y. Applications of time-domain spectroscopy to electron-phonon coupling dynamics at surfaces. CHEM REC 2014; 14:952-63. [PMID: 25139240 DOI: 10.1002/tcr.201402030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Indexed: 11/07/2022]
Abstract
Photochemistry is one of the most important branches in chemistry to promote and control chemical reactions. In particular, there has been growing interest in photoinduced processes at solid surfaces and interfaces with liquids such as water for developing efficient solar energy conversion. For example, photoinduced charge transfer between adsorbates and semiconductor substrates at the surfaces of metal oxides induced by photogenerated holes and electrons is a core process in photovoltaics and photocatalysis. In these photoinduced processes, electron-phonon coupling plays a central role. This paper describes how time-domain spectroscopy is applied to elucidate electron-phonon coupling dynamics at metal and semiconductor surfaces. Because nuclear dynamics induced by electronic excitation through electron-phonon coupling take place in the femtosecond time domain, the pump-and-probe method with ultrashort pulses used in time-domain spectroscopy is a natural choice for elucidating the electron-phonon coupling at metal and semiconductor surfaces. Starting with a phenomenological theory of coherent phonons generated by impulsive electronic excitation, this paper describes a couple of illustrative examples of the applications of linear and nonlinear time-domain spectroscopy to a simple adsorption system, alkali metal on Cu(111), and more complex photocatalyst systems.
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Affiliation(s)
- Yoshiyasu Matsumoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, 606-8502, Japan.
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9
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Mu X, Song T, Xu M, Lai CK, Siu CK, Laskin J, Chu IK. Discovery and mechanistic studies of facile N-terminal Cα-C bond cleavages in the dissociation of tyrosine-containing peptide radical cations. J Phys Chem B 2014; 118:4273-81. [PMID: 24678922 DOI: 10.1021/jp410525f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Fascinating N-terminal Cα-C bond cleavages in a series of nonbasic tyrosine-containing peptide radical cations have been observed under low-energy collision-induced dissociation (CID), leading to the generation of rarely observed x-type radical fragments, with significant abundances. CID experiments of the radical cations of the alanyltyrosylglycine tripeptide and its analogues suggested that the N-terminal Cα-C bond cleavage, yielding its [x2 + H](•+) radical cation, does not involve an N-terminal α-carbon-centered radical. Theoretical examination of a prototypical radical cation of the alanyltyrosine dipeptide, using density functional theory calculations, suggested that direct N-terminal Cα-C bond cleavage could produce an ion-molecule complex formed between the incipient a1(+) and x1(•) fragments. Subsequent proton transfer from the iminium nitrogen atom in a1(+) to the acyl carbon atom in x1(•) results in the observable [x1 + H](•+). The barriers against this novel Cα-C bond cleavage and the competitive N-Cα bond cleavage, forming the complementary [c1 + 2H](+)/[z1 - H](•+) ion pair, are similar (ca. 16 kcal mol(-1)). Rice-Ramsperger-Kassel-Marcus modeling revealed that [x1 + H](•+) and [c1 + 2H](+) species are formed with comparable rates, in agreement with energy-resolved CID experiments for [AY](•+).
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Affiliation(s)
- Xiaoyan Mu
- Department of Chemistry, The University of Hong Kong , Hong Kong, China
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10
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Scheu R, Roke S. Toward Vibrational Dynamics at Liquid–Liquid and Nano-Interfaces: Time-Resolved Sum-Frequency Scattering. J Phys Chem B 2014; 118:3366-71. [DOI: 10.1021/jp411798s] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rüdiger Scheu
- Laboratory of fundamental
BioPhotonics (LBP), Institute of Bioengineering (IBI), School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Sylvie Roke
- Laboratory of fundamental
BioPhotonics (LBP), Institute of Bioengineering (IBI), School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
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11
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Nomoto T, Fujio K, Sasahara A, Okajima H, Koide N, Katayama H, Onishi H. Phonon mode of TiO2 coupled with the electron transfer from N3 dye. J Chem Phys 2014; 138:224704. [PMID: 23781812 DOI: 10.1063/1.4807850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Low frequency vibrational spectra of submonolayer N3 dye (Ru(4,4(')-dicarboxy-2,2(')-bipyridine)2(NCS)2) adsorbed on TiO2 (110) were reported by using fourth-order coherent Raman spectroscopy, which is interface-sensitive vibrational spectroscopy. Most of the peaks observed in the experiment were at the same frequency as that of Raman and infrared spectra of the dye and TiO2. Two interfacial modes at 640 and 100 cm(-1) and one resonantly enhanced phonon at 146 cm(-1) appeared in addition to the pure TiO2 and N3 spectra. Adsorption of N3 dye on TiO2 contributed to the enhancement of 100 and 146 cm(-1) mode. The results not only reported interfacial low-frequency vibrations of TiO2 (110) with N3 dye adsorption but also suggested the coupling between the surface vibrations of TiO2 and charge transfer between N3 dye and TiO2 on the surface.
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Affiliation(s)
- Tomonori Nomoto
- Molecular Photoscience Research Center, Kobe University, Nada, Kobe 657-8501, Japan.
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12
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Quan Q, Hao Q, Song T, Siu CK, Chu IK. Mechanistic investigation of phosphate ester bond cleavages of glycylphosphoserinyltryptophan radical cations under low-energy collision-induced dissociation. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2013; 24:554-562. [PMID: 23516067 DOI: 10.1007/s13361-013-0597-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 02/18/2013] [Accepted: 02/21/2013] [Indexed: 06/01/2023]
Abstract
Under the conditions of low-energy collision-induced dissociation (CID), the canonical glycylphosphoserinyltryptophan radical cation having its radical located on the side chain of the tryptophan residue ([G(p)SW](•+)) fragments differently from its tautomer with the radical initially generated on the α-carbon atom of the glycine residue ([G(•)(p)SW](+)). The dissociation of [G(•)(p)SW](+) is dominated by the neutral loss of H3PO4 (98 Da), with backbone cleavage forming the [b2 - H](•+)/y1(+) pair as the minor products. In contrast, for [G(p)SW](•+), competitive cleavages along the peptide backbone, such as the formation of [G(p)SW - CO2](•+) and the [c2 + 2H](+)/[z(1) - H](•+) pair, significantly suppress the loss of neutral H3PO4. In this study, we used density functional theory (DFT) to examine the mechanisms for the tautomerizations of [G(•)(p)SW](+) and [G(p)SW](•+) and their dissociation pathways. Our results suggest that the dissociation reactions of these two peptide radical cations are more efficient than their tautomerizations, as supported by Rice-Ramsperger-Kassel-Marcus (RRKM) modeling. We also propose that the loss of H3PO4 from both of these two radical cationic tautomers is preferentially charge-driven, similar to the analogous dissociations of even-electron protonated peptides. The distonic radical cationic character of [G(•)(p)SW](+) results in its charge being more mobile, thereby favoring charge-driven loss of H3PO4; in contrast, radical-driven pathways are more competitive during the CID of [G(p)SW](•+).
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Affiliation(s)
- Quan Quan
- Department of Chemistry, University of Hong Kong, Hong Kong, China
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13
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Kong RPW, Quan Q, Hao Q, Lai CK, Siu CK, Chu IK. Formation and dissociation of phosphorylated peptide radical cations. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2012; 23:2094-2101. [PMID: 22968907 PMCID: PMC3514703 DOI: 10.1007/s13361-012-0479-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 08/14/2012] [Accepted: 08/14/2012] [Indexed: 06/01/2023]
Abstract
In this study, we generated phosphoserine- and phosphothreonine-containing peptide radical cations through low-energy collision-induced dissociation (CID) of the ternary metal-ligand phosphorylated peptide complexes [Cu(II)(terpy)(p)M](·2+) and [Co(III)(salen)(p)M](·+) [(p)M: phosphorylated angiotensin III derivative; terpy: 2,2':6',2''-terpyridine; salen: N,N'-ethylenebis(salicylideneiminato)]. Subsequent CID of the phosphorylated peptide radical cations ((p)M(·+)) revealed fascinating gas-phase radical chemistry, yielding (1) charge-directed b- and y-type product ions, (2) radical-driven product ions through cleavages of peptide backbones and side chains, and (3) different degrees of formation of [M - H(3)PO(4)](·+) species through phosphate ester bond cleavage. The CID spectra of the (p)M(·+) species and their non-phosphorylated analogues featured fragment ions of similar sequence, suggesting that the phosphoryl group did not play a significant role in the fragmentation of the peptide backbone or side chain. The extent of neutral H(3)PO(4) loss was influenced by the peptide sequence and the initial sites of the charge and radical. A preliminary density functional theory study, at the B3LYP 6-311++G(d,p) level of theory, of the neutral loss of H(3)PO(4) from a prototypical model--N-acetylphosphorylserine methylamide--revealed several factors governing the elimination of neutral phosphoryl groups through charge- and radical-induced mechanisms.
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Affiliation(s)
- Ricky P. W. Kong
- Department of Chemistry, University of Hong Kong, Hong Kong, China
| | - Quan Quan
- Department of Chemistry, University of Hong Kong, Hong Kong, China
| | - Qiang Hao
- Department of Biology and Chemistry, City University of Hong Kong, Hong Kong, China
| | - Cheuk-Kuen Lai
- Department of Chemistry, University of Hong Kong, Hong Kong, China
| | - Chi-Kit Siu
- Department of Biology and Chemistry, City University of Hong Kong, Hong Kong, China
| | - Ivan K. Chu
- Department of Chemistry, University of Hong Kong, Hong Kong, China
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14
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Matsumoto Y. Toward photochemistry of integrated heterogeneous systems. J Chem Phys 2012; 137:091705. [DOI: 10.1063/1.4746802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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15
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Hao Q, Song T, Ng DCM, Quan Q, Siu CK, Chu IK. Arginine-Facilitated Isomerization: Radical-Induced Dissociation of Aliphatic Radical Cationic Glycylarginyl(iso)leucine Tripeptides. J Phys Chem B 2012; 116:7627-34. [DOI: 10.1021/jp301882p] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Qiang Hao
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
- Department
of Biology and Chemistry, City University of Hong Kong, Hong Kong, China
| | - Tao Song
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Dominic C. M. Ng
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Quan Quan
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Chi-Kit Siu
- Department
of Biology and Chemistry, City University of Hong Kong, Hong Kong, China
| | - Ivan K. Chu
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
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16
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Watanabe K, Matsumoto Y, Yasuike T, Nobusada K. Adsorbate-Localized versus Substrate-Mediated Excitation Mechanisms for Generation of Coherent Cs–Cu Stretching Vibration at Cu(111). J Phys Chem A 2011; 115:9528-35. [DOI: 10.1021/jp112307k] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kazuya Watanabe
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Yoshiyasu Matsumoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Tomokazu Yasuike
- Institute for Molecular Science and The Graduate University for Advanced Studies (SOKENDAI), Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Katsuyuki Nobusada
- Institute for Molecular Science and The Graduate University for Advanced Studies (SOKENDAI), Myodaiji, Okazaki, Aichi 444-8585, Japan
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17
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Wang LM, Sametoglu V, Winkelmann A, Zhao J, Petek H. Two-Photon Photoemission Study of the Coverage-Dependent Electronic Structure of Chemisorbed Alkali Atoms on a Ag(111) Surface. J Phys Chem A 2011; 115:9479-84. [DOI: 10.1021/jp111932r] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lei-Ming Wang
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Vahit Sametoglu
- Department of Electrical & Computer Engineering, University of Alberta, Edmonton, Alberta T6G 2V4, Canada
| | - Aimo Winkelmann
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Jin Zhao
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, China
| | - Hrvoje Petek
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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18
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Song T, Ng DCM, Quan Q, Siu CK, Chu IK. Arginine-Facilitated α- and π-Radical Migrations in Glycylarginyltryptophan Radical Cations. Chem Asian J 2011; 6:888-98. [DOI: 10.1002/asia.201000677] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2010] [Indexed: 12/16/2022]
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19
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Xu M, Song T, Quan Q, Hao Q, Fang DC, Siu CK, Chu IK. Effect of the N-terminal basic residue on facile Cα–C bond cleavages of aromatic-containing peptide radical cations. Phys Chem Chem Phys 2011; 13:5888-96. [DOI: 10.1039/c0cp00974a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Abstract
Ultrafast lasers are versatile tools used in many scientific areas, from welding to eye surgery. They are also used to coherently manipulate light-matter interactions such as chemical reactions, but so far control experiments have concentrated on cleavage or rearrangement of existing molecular bonds. Here we demonstrate the synthesis of several molecular species starting from small reactant molecules in laser-induced catalytic surface reactions, and even the increase of the relative reaction efficiency by feedback-optimized laser pulses. We show that the control mechanism is nontrivial and sensitive to the relative proportion of the reactants. The control experiments open up a pathway towards photocatalysis and are relevant for research in physics, chemistry, and biology where light-induced bond formation is important.
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21
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Ng DCM, Song T, Siu SO, Siu CK, Laskin J, Chu IK. Formation, Isomerization, and Dissociation of α-Carbon-Centered and π-Centered Glycylglycyltryptophan Radical Cations. J Phys Chem B 2010; 114:2270-80. [DOI: 10.1021/jp908599a] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dominic C. M. Ng
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China, Pacific Northwest National Laboratory, Fundamental Sciences Division, Richland, Washington, and Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Tao Song
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China, Pacific Northwest National Laboratory, Fundamental Sciences Division, Richland, Washington, and Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - S. O. Siu
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China, Pacific Northwest National Laboratory, Fundamental Sciences Division, Richland, Washington, and Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - C. K. Siu
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China, Pacific Northwest National Laboratory, Fundamental Sciences Division, Richland, Washington, and Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Julia Laskin
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China, Pacific Northwest National Laboratory, Fundamental Sciences Division, Richland, Washington, and Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Ivan K. Chu
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China, Pacific Northwest National Laboratory, Fundamental Sciences Division, Richland, Washington, and Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
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22
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Coherent Lattice Oscillations in Solids and Their Optical Control. SPRINGER SERIES IN CHEMICAL PHYSICS 2010. [DOI: 10.1007/978-3-642-03825-9_2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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23
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Optically excited near-surface phonons of TiO2 (110) observed by fourth-order coherent Raman spectroscopy. J Chem Phys 2009; 131:084703. [DOI: 10.1063/1.3207947] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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24
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Nomoto T, Onishi H. Fourth-order coherent Raman spectroscopy of liquid-solid interfaces: near-surface phonons of TiO2 (110) in liquids. APPLIED SPECTROSCOPY 2009; 63:941-946. [PMID: 19678993 DOI: 10.1366/000370209788964395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The fourth-order coherent Raman response of a TiO2 (110) surface covered by HCl aqueous solution, neat octanol, acetic acid, or carbon tetrachloride layers is acquired. Four fourth-order optical responses were identified at 837-826, 452-448, 371-362, and 184-183 cm(-1) and assigned to near-surface phonons of TiO2. A third-order response produced in the bulk liquid layer was superimposed on the fourth-order response, when coherent vibrations are efficiently excited in the layer.
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Affiliation(s)
- Tomonori Nomoto
- Molecular Photoscience Research Center, Kobe University, Rokkodai, Nada, Kobe, 657-8501, Japan.
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25
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Melnikov A, Povolotskiy A, Bovensiepen U. Magnon-enhanced phonon damping at Gd(0001) and Tb(0001) surfaces using femtosecond time-resolved optical second-harmonic generation. PHYSICAL REVIEW LETTERS 2008; 100:247401. [PMID: 18643627 DOI: 10.1103/physrevlett.100.247401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2007] [Indexed: 05/26/2023]
Abstract
Damping of coherent optical phonons is investigated by femtosecond time-resolved second-harmonic generation at Gd(0001) and Tb(0001) surfaces. At low temperature the damping rate increases monotonically with temperature, but close to the Curie point the damping rate is strongly reduced. We explain this behavior by phonon-magnon scattering originating from spin-orbit coupling proven by a larger effect for Tb than for Gd. Consideration of phonon-electron and phonon-phonon scattering shows that magnon-mediated damping is dominant almost up to the Curie temperature.
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Affiliation(s)
- A Melnikov
- Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany
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26
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Quasi-diabatic decoupling of Born-Oppenheimer potential energy curves for adsorbate-metal surface systems. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.03.058] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Nomoto T, Onishi H. Fourth-order Raman spectroscopy of adsorbed organic species on TiO2 surface. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.02.108] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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28
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Nagata Y, Tanimura Y, Mukamel S. Two-dimensional infrared surface spectroscopy for CO on Cu(100): Detection of intermolecular coupling of adsorbates. J Chem Phys 2007; 126:204703. [PMID: 17552785 DOI: 10.1063/1.2727445] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Surface-specific infrared signals obtained by subjecting the system to two infrared laser pulses are calculated for an admixture of CO and isotopic CO on Cu(100) by using molecular dynamics simulation based on a stability matrix formalism. The two-dimensional profiles of the signals in the frequency domain show both diagonal and cross peaks. The former peaks mainly arise from the overtones of the CO and isotopic CO, while the latter represent the couplings between those. As temperature is increased, the phases of cross peaks in a second-order infrared response function change significantly, while those of diagonal peaks are unchanged. The authors show that the phase shifts are originated from the potential anharmonicities due to the electronic interaction between adsorbates. Using a model with two dipole moments, they find that the frustrated rotational mode activated with temperature has effects on the anharmonicity. These results indicate that two-dimensional infrared surface spectroscopy reveals the anharmonic couplings between adsorbates and surface atoms or between adsorbates which cannot be observed in first-order spectroscopy.
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Affiliation(s)
- Yuki Nagata
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
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29
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Matsumoto Y. Photochemistry and Photo-Induced Ultrafast Dynamics at Metal Surfaces. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.842] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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30
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Nomoto T, Onishi H. Fourth-order coherent Raman spectroscopy in a time domain: applications to buried interfaces. Phys Chem Chem Phys 2007; 9:5515-21. [DOI: 10.1039/b704566m] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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