1
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Ree J, Ko KC, Kim YH, Shin HK. Excitation of NH Stretching Modes in Aromatic Molecules: o-Toluidine and α-Methylbenzylamine. J Phys Chem B 2023; 127:7276-7282. [PMID: 37566790 DOI: 10.1021/acs.jpcb.3c03968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/13/2023]
Abstract
Selectively excited o-toluidine and α-methylbenzylamine have been studied with quasi-classical trajectory procedures to determine the extent and timescales of intramolecular energy flow. The initial excitation is in the stretching mode of the para-CH bond, and its flow is initiated by interaction with an argon atom. Energy flow to the NH stretching mode is the dominant relaxation pathway, and its effectiveness is enhanced strongly by the methyl-NH interaction. Energy flow characteristics in both molecules are similar, but the flow is more effective in o-toluidine than in α-methylbenzylamine because the methyl group bonded to the benzene ring exerts stronger perturbation on the energy-flow pathway than the group bonded to the side chain. The relaxation of the initially excited CH completes on a timescale of several picoseconds, but the main part of energy flow to the NH occurs on a subpicosecond scale. In o-toluidine, carbon-carbon overtone modes lead to ring-CC bonds gaining and transporting more energy than high-frequency CH bonds, but they all gain far less energy than the NH stretching mode.
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Affiliation(s)
- J Ree
- Department of Chemistry Education, Chonnam National University, Gwangju 61186, Korea
| | - K C Ko
- Department of Chemistry Education, Chonnam National University, Gwangju 61186, Korea
| | - Y H Kim
- Department of Chemistry, Inha University, Incheon 22212, Korea
| | - H K Shin
- Department of Chemistry, University of Nevada, Reno, Nevada 89557, United States
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2
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Hassani M, Mallon CJ, Monzy JN, Schmitz AJ, Brewer SH, Fenlon EE, Tucker MJ. Inhibition of vibrational energy flow within an aromatic scaffold via heavy atom effect. J Chem Phys 2023; 158:224201. [PMID: 37309893 PMCID: PMC10275622 DOI: 10.1063/5.0153760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 05/25/2023] [Indexed: 06/14/2023] Open
Abstract
The regulation of intramolecular vibrational energy redistribution (IVR) to influence energy flow within molecular scaffolds provides a way to steer fundamental processes of chemistry, such as chemical reactivity in proteins and design of molecular diodes. Using two-dimensional infrared (2D IR) spectroscopy, changes in the intensity of vibrational cross-peaks are often used to evaluate different energy transfer pathways present in small molecules. Previous 2D IR studies of para-azidobenzonitrile (PAB) demonstrated that several possible energy pathways from the N3 to the cyano-vibrational reporters were modulated by Fermi resonance, followed by energy relaxation into the solvent [Schmitz et al., J. Phys. Chem. A 123, 10571 (2019)]. In this work, the mechanisms of IVR were hindered via the introduction of a heavy atom, selenium, into the molecular scaffold. This effectively eliminated the energy transfer pathway and resulted in the dissipation of the energy into the bath and direct dipole-dipole coupling between the two vibrational reporters. Several structural variations of the aforementioned molecular scaffold were employed to assess how each interrupted the energy transfer pathways, and the evolution of 2D IR cross-peaks was measured to assess the changes in the energy flow. By eliminating the energy transfer pathways through isolation of specific vibrational transitions, through-space vibrational coupling between an azido (N3) and a selenocyanato (SeCN) probe is facilitated and observed for the first time. Thus, the rectification of this molecular circuitry is accomplished through the inhibition of energy flow using heavy atoms to suppress the anharmonic coupling and, instead, favor a vibrational coupling pathway.
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Affiliation(s)
- Majid Hassani
- Department of Chemistry, University of Nevada, Reno, Nevada 89557, USA
| | | | - Judith N. Monzy
- Department of Chemistry, Franklin & Marshall College, Lancaster, Pennsylvania 17604-3003, USA
| | - Andrew J. Schmitz
- Department of Chemistry, University of Nevada, Reno, Nevada 89557, USA
| | - Scott H. Brewer
- Department of Chemistry, Franklin & Marshall College, Lancaster, Pennsylvania 17604-3003, USA
| | - Edward E. Fenlon
- Department of Chemistry, Franklin & Marshall College, Lancaster, Pennsylvania 17604-3003, USA
| | - Matthew J. Tucker
- Department of Chemistry, University of Nevada, Reno, Nevada 89557, USA
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3
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Hanes AT, Grieco C, Lalisse RF, Hadad CM, Kohler B. Vibrational relaxation by methylated xanthines in solution: Insights from 2D IR spectroscopy and calculations. J Chem Phys 2023; 158:044302. [PMID: 36725522 DOI: 10.1063/5.0135412] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Two-dimensional infrared (2D IR) spectroscopy, infrared pump-infrared probe spectroscopy, and density functional theory calculations were used to study vibrational relaxation by ring and carbonyl stretching modes in a series of methylated xanthine derivatives in acetonitrile and deuterium oxide (heavy water). Isotropic signals from the excited symmetric and asymmetric carbonyl stretch modes decay biexponentially in both solvents. Coherent energy transfer between the symmetric and asymmetric carbonyl stretching modes gives rise to a quantum beat in the time-dependent anisotropy signals. The damping time of the coherent oscillation agrees with the fast decay component of the carbonyl bleach recovery signals, indicating that this time constant reflects intramolecular vibrational redistribution (IVR) to other solute modes. Despite their similar frequencies, the excited ring modes decay monoexponentially with a time constant that matches the slow decay component of the carbonyl modes. The slow decay times, which are faster in heavy water than in acetonitrile, approximately match the ones observed in previous UV pump-IR probe measurements on the same compounds. The slow component is assigned to intermolecular energy transfer to solvent bath modes from low-frequency solute modes, which are populated by IVR and are anharmonically coupled to the carbonyl and ring stretch modes. 2D IR measurements indicate that the carbonyl stretching modes are weakly coupled to the delocalized ring modes, resulting in slow exchange that cannot explain the common solvent-dependence. IVR is suggested to occur at different rates for the carbonyl vs ring modes due to differences in mode-specific couplings and not to differences in the density of accessible states.
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Affiliation(s)
- Alex T Hanes
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, USA
| | - Christopher Grieco
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, USA
| | - Remy F Lalisse
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, USA
| | - Christopher M Hadad
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, USA
| | - Bern Kohler
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, USA
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4
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Mizutani Y, Mizuno M. Time-resolved spectroscopic mapping of vibrational energy flow in proteins: Understanding thermal diffusion at the nanoscale. J Chem Phys 2022; 157:240901. [PMID: 36586981 DOI: 10.1063/5.0116734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Vibrational energy exchange between various degrees of freedom is critical to barrier-crossing processes in proteins. Hemeproteins are well suited for studying vibrational energy exchange in proteins because the heme group is an efficient photothermal converter. The released energy by heme following photoexcitation shows migration in a protein moiety on a picosecond timescale, which is observed using time-resolved ultraviolet resonance Raman spectroscopy. The anti-Stokes ultraviolet resonance Raman intensity of a tryptophan residue is an excellent probe for the vibrational energy in proteins, allowing the mapping of energy flow with the spatial resolution of a single amino acid residue. This Perspective provides an overview of studies on vibrational energy flow in proteins, including future perspectives for both methodologies and applications.
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Affiliation(s)
- Yasuhisa Mizutani
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Misao Mizuno
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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5
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Zhang J, Kundu A, Elsaesser T, Macchi P, Kalter M, Eickerling G, Scherer W. Ultrafast Vibrational Response of Activated C-D Bonds in a Chloroform-Platinum(II) Complex. J Phys Chem Lett 2022; 13:4447-4454. [PMID: 35561260 PMCID: PMC9150101 DOI: 10.1021/acs.jpclett.2c00771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
The vibrational response of the activated C-D bond in the chloroform complex [Pt(C6H5)2(btz-N,N')·CDCl3, where btz = 2,2'-bi-5,6-dihydro-4H-1,3-thiazine] is studied by linear and nonlinear two-dimensional infrared (2D-IR) spectroscopy. The change of the C-D stretching vibration of metal-coordinated CDCl3 relative to the free solvent molecule serves as a measure of the non-classical Pt···D-C interaction strength. The stretching absorption band of the activated C-D bond displays a red shift of 119 cm-1 relative to uncoordinated CDCl3, a strong broadening, and an 8-fold enhancement of spectrally integrated absorption. The infrared (IR) absorption and 2D-IR line shapes are governed by spectral diffusion on 200 fs and 2 ps time scales, induced by the fluctuating solvent CDCl3. The enhanced vibrational absorption and coupling to solvent forces are assigned to the enhanced electric polarizability of the activated C-D bond. Density functional theory calculations show a significant increase of C-D bond polarizability of CDCl3 upon coordination to the 16 valence electron Pt(II) complex.
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Affiliation(s)
- Jia Zhang
- Max-Born-Institut
für Nichtlineare Optik und Kurzzeitspektroskopie, 12489 Berlin, Germany
| | - Achintya Kundu
- Max-Born-Institut
für Nichtlineare Optik und Kurzzeitspektroskopie, 12489 Berlin, Germany
| | - Thomas Elsaesser
- Max-Born-Institut
für Nichtlineare Optik und Kurzzeitspektroskopie, 12489 Berlin, Germany
| | - Piero Macchi
- Department
of Chemistry, Materials and Chemical Engineering, Politecnico di Milano, 20131 Milano, Italy
| | - Marcel Kalter
- Institut
für Physik, Universität Augsburg, 86135 Augsburg, Germany
| | - Georg Eickerling
- Institut
für Physik, Universität Augsburg, 86135 Augsburg, Germany
| | - Wolfgang Scherer
- Institut
für Physik, Universität Augsburg, 86135 Augsburg, Germany
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6
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Park JY, Mondal S, Kwon HJ, Sahu PK, Han H, Kwak K, Cho M. Effect of isotope substitution on the Fermi resonance and vibrational lifetime of unnatural amino acids modified with IR probe: A 2D-IR and pump-probe study of 4-azido-L-phenyl alanine. J Chem Phys 2020; 153:164309. [DOI: 10.1063/5.0025289] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Jun Young Park
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul 02841, South Korea
- Department of Chemistry, Korea University, Seoul 02841, South Korea
| | - Saptarsi Mondal
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul 02841, South Korea
- Department of Chemistry, Korea University, Seoul 02841, South Korea
| | - Hyeok-Jun Kwon
- Department of Chemistry, Korea University, Seoul 02841, South Korea
| | - Prabhat Kumar Sahu
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul 02841, South Korea
- Department of Chemistry, Korea University, Seoul 02841, South Korea
| | - Hogyu Han
- Department of Chemistry, Korea University, Seoul 02841, South Korea
| | - Kyungwon Kwak
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul 02841, South Korea
- Department of Chemistry, Korea University, Seoul 02841, South Korea
| | - Minhaeng Cho
- Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), Korea University, Seoul 02841, South Korea
- Department of Chemistry, Korea University, Seoul 02841, South Korea
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7
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Guan J, Wei R, Prlj A, Peng J, Lin K, Liu J, Han H, Corminboeuf C, Zhao D, Yu Z, Zheng J. Direct Observation of Aggregation‐Induced Emission Mechanism. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004318] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Jianxin Guan
- College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular Sciences Peking University Beijing 100871 China
| | - Rong Wei
- College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular Sciences Peking University Beijing 100871 China
| | - Antonio Prlj
- Laboratory for Computational Molecular Design École polytechnique fédérale de Lausanne Lausanne Switzerland
| | - Jie Peng
- College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular Sciences Peking University Beijing 100871 China
| | - Kun‐Han Lin
- Laboratory for Computational Molecular Design École polytechnique fédérale de Lausanne Lausanne Switzerland
| | - Jitian Liu
- College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular Sciences Peking University Beijing 100871 China
| | - Han Han
- College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular Sciences Peking University Beijing 100871 China
| | - Clémence Corminboeuf
- Laboratory for Computational Molecular Design École polytechnique fédérale de Lausanne Lausanne Switzerland
| | - Dahui Zhao
- College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular Sciences Peking University Beijing 100871 China
| | - Zhihao Yu
- College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular Sciences Peking University Beijing 100871 China
| | - Junrong Zheng
- College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular Sciences Peking University Beijing 100871 China
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8
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Guan J, Wei R, Prlj A, Peng J, Lin KH, Liu J, Han H, Corminboeuf C, Zhao D, Yu Z, Zheng J. Direct Observation of Aggregation-Induced Emission Mechanism. Angew Chem Int Ed Engl 2020; 59:14903-14909. [PMID: 32441469 DOI: 10.1002/anie.202004318] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 05/03/2020] [Indexed: 12/30/2022]
Abstract
The mechanism of aggregation-induced emission, which overcomes the common aggregation-caused quenching problem in organic optoelectronics, is revealed by monitoring the real time structural evolution and dynamics of electronic excited state with frequency and polarization resolved ultrafast UV/IR spectroscopy and theoretical calculations. The formation of Woodward-Hoffmann cyclic intermediates upon ultraviolet excitation is observed in dilute solutions of tetraphenylethylene and its derivatives but not in their respective solid. The ultrafast cyclization provides an efficient nonradiative relaxation pathway through crossing a conical intersection. Without such a reaction mechanism, the electronic excitation is preserved in the molecular solids and the molecule fluoresces efficiently, aided by the very slow intermolecular charge and energy transfers due to the well separated molecular packing arrangement. The mechanisms can be general for tuning the properties of chromophores in different phases for various important applications.
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Affiliation(s)
- Jianxin Guan
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing, 100871, China
| | - Rong Wei
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing, 100871, China
| | - Antonio Prlj
- Laboratory for Computational Molecular Design, École polytechnique fédérale de Lausanne, Lausanne, Switzerland
| | - Jie Peng
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing, 100871, China
| | - Kun-Han Lin
- Laboratory for Computational Molecular Design, École polytechnique fédérale de Lausanne, Lausanne, Switzerland
| | - Jitian Liu
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing, 100871, China
| | - Han Han
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing, 100871, China
| | - Clémence Corminboeuf
- Laboratory for Computational Molecular Design, École polytechnique fédérale de Lausanne, Lausanne, Switzerland
| | - Dahui Zhao
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing, 100871, China
| | - Zhihao Yu
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing, 100871, China
| | - Junrong Zheng
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing, 100871, China
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9
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Schmitz AJ, Pandey HD, Chalyavi F, Shi T, Fenlon EE, Brewer SH, Leitner DM, Tucker MJ. Tuning Molecular Vibrational Energy Flow within an Aromatic Scaffold via Anharmonic Coupling. J Phys Chem A 2019; 123:10571-10581. [PMID: 31735035 DOI: 10.1021/acs.jpca.9b08010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
From guiding chemical reactivity in synthesis or protein folding to the design of energy diodes, intramolecular vibrational energy redistribution harnesses the power to influence the underlying fundamental principles of chemistry. To evaluate the ability to steer these processes, the mechanism and time scales of intramolecular vibrational energy redistribution through aromatic molecular scaffolds have been assessed by utilizing two-dimensional infrared (2D IR) spectroscopy. 2D IR cross peaks reveal energy relaxation through an aromatic scaffold from the azido- to the cyano-vibrational reporters in para-azidobenzonitrile (PAB) and para-(azidomethyl)benzonitrile (PAMB) prior to energy relaxation into the solvent. The rates of energy transfer are modulated by Fermi resonances, which are apparent by the coupling cross peaks identified within the 2D IR spectrum. Theoretical vibrational mode analysis allowed the determination of the origins of the energy flow, the transfer pathway, and a direct comparison of the associated transfer rates, which were in good agreement with the experimental results. Large variations in energy-transfer rates, approximately 1.9 ps for PAB and 23 ps for PAMB, illustrate the importance of strong anharmonic coupling, i.e., Fermi resonance, on the transfer pathways. In particular, vibrational energy rectification is altered by Fermi resonances of the cyano- and azido-modes allowing control of the propensity for energy flow.
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Affiliation(s)
- Andrew J Schmitz
- Department of Chemistry , University of Nevada , Reno , Nevada 89557 , United States
| | - Hari Datt Pandey
- Department of Chemistry , University of California , Riverside , California 92521 , United States
| | - Farzaneh Chalyavi
- Department of Chemistry , University of Nevada , Reno , Nevada 89557 , United States
| | - Tianjiao Shi
- Department of Chemistry , Franklin & Marshall College , Lancaster , Pennsylvania 17604-3003 , United States
| | - Edward E Fenlon
- Department of Chemistry , Franklin & Marshall College , Lancaster , Pennsylvania 17604-3003 , United States
| | - Scott H Brewer
- Department of Chemistry , Franklin & Marshall College , Lancaster , Pennsylvania 17604-3003 , United States
| | - David M Leitner
- Department of Chemistry , University of Nevada , Reno , Nevada 89557 , United States
| | - Matthew J Tucker
- Department of Chemistry , University of Nevada , Reno , Nevada 89557 , United States
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10
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Wang R, Jiang W, Qu Z, Zhu Y, Yang Y, Wang Z. Intermolecular vibrational energy transfers in nitro-energetic molecules: A first-principles molecular dynamics study. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Wei Q, Zhang M, Zhou D, Li X, Bian H, Fang Y. Ultrafast Hydrogen Bond Exchanging between Water and Anions in Concentrated Ionic Liquid Aqueous Solutions. J Phys Chem B 2019; 123:4766-4775. [PMID: 31082232 DOI: 10.1021/acs.jpcb.9b03504] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mixtures of 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BF4) ionic liquids (ILs) and water as a function of IL concentrations have been investigated by Fourier transform infrared (FTIR) spectroscopy and ultrafast two-dimensional IR (2D IR) spectroscopy. FTIR spectra of the mixtures resolve two different types of water species, one interacting with the BF4- anions and the other associated with bulklike water molecules. These two water species are in a dynamic equilibrium through forming different hydrogen bonding configurations which are separated by more than 100 cm-1 in the IR spectra. The structural dynamics of the IL mixtures are further revealed by monitoring the vibrational relaxation dynamics of the OD stretching group of interfacial water molecules hydrogen bonded to BF4- anions. With the increase of the IL bulk concentration, vibrational population and rotational dynamics of the interfacial water molecules can be described by a biexponential decay function and are strongly dependent on the IL concentrations. Furthermore, the ultrafast hydrogen bond exchanging between water and BF4- anions in the ILs are also measured using 2D IR spectroscopy. The average hydrogen bond exchanging rate is determined to be 19 ± 4 ps, which is around 3 times slower than that in the NaBF4 electrolyte aqueous solution. The much slower hydrogen bond exchanging rate indicates that the local structure of ILs and water molecules are strongly mediated by the steric effect of the cationic group in the ILs, which is proposed to be responsible for the formation of the heterogeneous structure in the IL mixtures. By using SCN- as the anionic probe, the structural inhomogeneity in the IL solutions can be confirmed from the distinct rotational dynamics of the SCN-, which is segregated from the rotational dynamics of water molecules in the IL mixtures.
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Affiliation(s)
- Qianshun Wei
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China
| | - Miaomiao Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China
| | - Dexia Zhou
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China
| | - Xiaoqian Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China
| | - Hongtao Bian
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China
| | - Yu Fang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China
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12
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Hoffman DJ, Fica-Contreras SM, Fayer MD. Fast dynamics of a hydrogen-bonding glass forming liquid: Chemical exchange-induced spectral diffusion in 2D IR spectroscopy. J Chem Phys 2019; 150:124507. [DOI: 10.1063/1.5088499] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- David J. Hoffman
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | | | - Michael D. Fayer
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
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13
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Liu Q, Zhang Y, Zhang Q, Wei Q, Zhou D, Wu G, Cai K, Yuan K, Bian H. Understanding the intramolecular vibrational energy transfer and structural dynamics of anionic ligands in a photo-catalytic CO 2reduction catalyst. Phys Chem Chem Phys 2019; 21:23026-23035. [DOI: 10.1039/c9cp05029a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The knowledge of intramolecular vibrational energy redistribution (IVR) and structural dynamics of rhenium photo-catalysts is essential for understanding the mechanism of the photo-catalytic process of CO2reduction.
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Affiliation(s)
- Qianchen Liu
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an
- China
| | - Yutong Zhang
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Qi Zhang
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Qianshun Wei
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an
- China
| | - Dexia Zhou
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an
- China
| | - Guorong Wu
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Kaicong Cai
- College of Chemistry and Materials Science
- Fujian Normal University
- Fuzhou
- China
| | - Kaijun Yuan
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian
- China
| | - Hongtao Bian
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an
- China
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14
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Zhang Y, Chen X, Zheng B, Guo X, Pan Y, Chen H, Li H, Min S, Guan C, Huang KW, Zheng J. Structural analysis of transient reaction intermediate in formic acid dehydrogenation catalysis using two-dimensional IR spectroscopy. Proc Natl Acad Sci U S A 2018; 115:12395-12400. [PMID: 30455307 PMCID: PMC6298111 DOI: 10.1073/pnas.1809342115] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The molecular structure of a catalytically active key intermediate is determined in solution by employing 2D IR spectroscopy measuring vibrational cross-angles. The formate intermediate (2) in the formic acid dehydrogenation reaction catalyzed by a phosphorus-nitrogen PN3P-Ru catalyst is elucidated. Our spectroscopic studies show that the complex features a formate ion directly attached to the Ru center as a ligand, and a proton added to the imine arm of the dearomatized PN3P* ligand. During the catalytic process, the imine arms are not only reversibly protonated and deprotonated, but also interacting with the protic substrate molecules, effectively serving as the local proton buffer to offer remarkable stability with a turnover number (TON) over one million.
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Affiliation(s)
- Yufan Zhang
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, 100871 Beijing, China
- Department of Chemistry, Rice University, Houston, TX 77005
| | - Xin Chen
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, 100871 Beijing, China
| | - Bin Zheng
- King Abdullah University of Science and Technology Catalysis Center, King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Xunmin Guo
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, 100871 Beijing, China
- Department of Chemistry, Rice University, Houston, TX 77005
| | - Yupeng Pan
- King Abdullah University of Science and Technology Catalysis Center, King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology , 23955-6900 Thuwal, Saudi Arabia
| | - Hailong Chen
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, 100871 Beijing, China
- Department of Chemistry, Rice University, Houston, TX 77005
| | - Huaifeng Li
- King Abdullah University of Science and Technology Catalysis Center, King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology , 23955-6900 Thuwal, Saudi Arabia
| | - Shixiong Min
- King Abdullah University of Science and Technology Catalysis Center, King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology , 23955-6900 Thuwal, Saudi Arabia
| | - Chao Guan
- King Abdullah University of Science and Technology Catalysis Center, King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology , 23955-6900 Thuwal, Saudi Arabia
| | - Kuo-Wei Huang
- King Abdullah University of Science and Technology Catalysis Center, King Abdullah University of Science and Technology, 23955-6900 Thuwal, Saudi Arabia;
- Division of Physical Science and Engineering, King Abdullah University of Science and Technology , 23955-6900 Thuwal, Saudi Arabia
| | - Junrong Zheng
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, 100871 Beijing, China;
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15
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Wei Q, Zhou D, Li X, Chen Y, Bian H. Structural Dynamics of Dimethyl Sulfoxide Aqueous Solutions Investigated by Ultrafast Infrared Spectroscopy: Using Thiocyanate Anion as a Local Vibrational Probe. J Phys Chem B 2018; 122:12131-12138. [DOI: 10.1021/acs.jpcb.8b10058] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qianshun Wei
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Dexia Zhou
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Xiaoqian Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Yuwan Chen
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Hongtao Bian
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
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16
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Pyles CG, Olson CM, Massari AM. Vibrational heavy atom effect controls relaxation and spectral diffusion in triphenyl hydride complexes. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.02.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Zhou DX, Wei QS, Bian HT, Zheng JR. Direct Vibrational Energy Transfer in Monomeric Water Probed with Ultrafast Two Dimensional Infrared Spectroscopy. CHINESE J CHEM PHYS 2017. [DOI: 10.1063/1674-0068/30/cjcp1710189] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- De-xia Zhou
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Qian-shun Wei
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Hong-tao Bian
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Jun-rong Zheng
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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18
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Hoffman DJ, Fayer MD. Discontinuity in Fast Dynamics at the Glass Transition of ortho-Terphenyl. J Phys Chem B 2017; 121:10417-10428. [PMID: 29039665 DOI: 10.1021/acs.jpcb.7b08301] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The dynamics of the molecular glass former ortho-terphenyl through the glass transition were observed with two-dimensional infrared vibrational spectroscopy measurements of spectral diffusion using the small probe molecule phenylselenocyanate. Although the slow diffusive motions were not visible on the experimental time scale, a picosecond-scale exponential relaxation was observed at temperatures from above to well below the glass transition temperature. The characteristic time scale has a smooth temperature dependence from the liquid into the glass phase, but the range of vibrational frequencies the probe samples displayed a discontinuity at the glass transition temperature. Complementary pump-probe experiments associate the observed motion with density fluctuations. The key features of the dynamics are reproduced with a simple corrugated well potential energy surface model. In addition, the temperature dependence of the homogeneous vibrational dephasing was found to have a T2 functional form, where T is the absolute temperature.
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Affiliation(s)
- David J Hoffman
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
| | - Michael D Fayer
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
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19
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Ramos S, Scott KJ, Horness RE, Le Sueur AL, Thielges MC. Extended timescale 2D IR probes of proteins: p-cyanoselenophenylalanine. Phys Chem Chem Phys 2017; 19:10081-10086. [PMID: 28367555 PMCID: PMC6252261 DOI: 10.1039/c7cp00403f] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The importance of dynamics to the function of proteins is well appreciated, but the difficulty in their measurement impedes investigation into their precise role(s). 2D IR spectroscopy is a developing approach for the study of dynamics and has motivated efforts to develop spectrally resolved IR probe groups that enable its application for measuring the dynamics at specific sites in a protein. A challenge with this approach is that the timescales accessible are limited by the vibrational lifetimes of the probes. Toward development of better probes for 2D IR spectroscopy of protein dynamics, we report the characterization of p-cyano-seleno-phenylalanine (CNSePhe), a derivative of the well established IR probe p-cyano-phenylalanine (CNPhe), by FT IR, pump-probe, and 2D IR spectroscopy. The incorporation of the heavy Se atom decouples the CN vibration from the rest in the molecule. Although this leads to a reduction of the transition dipole strength, and thus a reduction in signal intensity, it also dramatically increases the vibrational lifetime, enabling collection of 2D IR spectra for analysis of molecular dynamics on much longer timescales. Interestingly, we also find that the lifetime for CNSePhe shows increased sensitivity to the presence of hydrogen bonding interactions with the CN, suggesting that the probe should be useful for interpretation of CN spectra and possibly for the study of solvation.
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Affiliation(s)
- S. Ramos
- Department of Chemistry, Indiana University, Bloomington, Indiana 47401, USA.
| | - K. J. Scott
- Department of Chemistry, Indiana University, Bloomington, Indiana 47401, USA.
| | - R. E. Horness
- Department of Chemistry, Indiana University, Bloomington, Indiana 47401, USA.
| | - A. L. Le Sueur
- Department of Chemistry, Indiana University, Bloomington, Indiana 47401, USA.
| | - M. C. Thielges
- Department of Chemistry, Indiana University, Bloomington, Indiana 47401, USA.
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20
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Wei Q, Zhou D, Bian H. Negligible cation effect on the vibrational relaxation dynamics of water molecules in NaClO4 and LiClO4 aqueous electrolyte solutions. RSC Adv 2017. [DOI: 10.1039/c7ra08840j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Negligible cation effects on the vibrational relaxation dynamics of water molecules in NaClO4 and LiClO4 aqueous solutions.
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Affiliation(s)
- Qianshun Wei
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an
- China
| | - Dexia Zhou
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an
- China
| | - Hongtao Bian
- Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an
- China
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21
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Shen YN, Jiang B, Ge CQ, Deng GH, Chen HL, Yang XM, Yuan KJ, Zheng JR. Intermolecular Vibrational Energy Transfers in Melts and Solutions. CHINESE J CHEM PHYS 2016. [DOI: 10.1063/1674-0068/29/cjcp1602028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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22
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Rodgers JM, Zhang W, Bazewicz CG, Chen J, Brewer SH, Gai F. Kinetic Isotope Effect Provides Insight into the Vibrational Relaxation Mechanism of Aromatic Molecules: Application to Cyano-phenylalanine. J Phys Chem Lett 2016; 7:1281-1287. [PMID: 26990401 PMCID: PMC4824650 DOI: 10.1021/acs.jpclett.6b00325] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Varying the reduced mass of an oscillator via isotopic substitution provides a convenient means to alter its vibrational frequency and hence has found wide applications. Herein, we show that this method can also help delineate the vibrational relaxation mechanism, using four isotopomers of the unnatural amino acid p-cyano-phenylalanine (Phe-CN) as models. In water, the nitrile stretching frequencies of these isotopomers, Phe-(12)C(14)N (1), Phe-(12)C(15)N (2), Phe-(13)C(14)N (3), and Phe-(13)C(15)N (4), are found to be equally separated by ∼27 cm(-1), whereas their vibrational lifetimes are determined to be 4.0 ± 0.2 (1), 2.2 ± 0.1 (2), 3.4 ± 0.2 (3), and 7.9 ± 0.5 ps (4), respectively. We find that an empirical relationship that considers the effective reduced mass of CN can accurately account for the observed frequency gaps, while the vibrational lifetime distribution, which suggests an intramolecular relaxation mechanism, can be rationalized by the order-specific density of states near the CN stretching frequency.
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Affiliation(s)
- Jeffrey M. Rodgers
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Wenkai Zhang
- The Ultrafast Optical Processes Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | | | - Jianxin Chen
- The Ultrafast Optical Processes Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Scott H. Brewer
- Department of Chemistry, Franklin & Marshall College, Lancaster, Pennsylvania 17604-3003
| | - Feng Gai
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
- The Ultrafast Optical Processes Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
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23
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Ge C, Shen Y, Deng GH, Tian Y, Yu D, Yang X, Yuan K, Zheng J. Negligible Isotopic Effect on Dissociation of Hydrogen Bonds. J Phys Chem B 2016; 120:3187-95. [DOI: 10.1021/acs.jpcb.5b12652] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chuanqi Ge
- School
of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of
the Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - Yuneng Shen
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of
the Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Gang-Hua Deng
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of
the Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - Yuhuan Tian
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of
the Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - Dongqi Yu
- School
of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China
| | - Xueming Yang
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of
the Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - Kaijun Yuan
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of
the Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
| | - Junrong Zheng
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of
the Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
- Department
of Chemistry, Rice University, Houston, Texas 77005, United States
- College
of Chemistry and Molecular Engineering, Beijing National Laboratory
for Molecular Sciences, Peking University, Beijing 100871, China
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24
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Yang W, Wei D, Jin X, Xu C, Geng Z, Guo Q, Ma Z, Dai D, Fan H, Yang X. Effect of the Hydrogen Bond in Photoinduced Water Dissociation: A Double-Edged Sword. J Phys Chem Lett 2016; 7:603-608. [PMID: 26810945 DOI: 10.1021/acs.jpclett.6b00015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Photoinduced water dissociation on rutile-TiO2 was investigated using various methods. Experimental results reveal that the water dissociation occurs via transferring an H atom to a bridge bonded oxygen site and ejecting an OH radical to the gas phase during irradiation. The reaction is strongly suppressed as the water coverage increases. Further scanning tunneling microscopy study demonstrates that hydrogen bonds between water molecules have a dramatic effect on the reaction. Interestingly, a single hydrogen bond in water dimer enhances the water dissociation reaction, while one-dimensional hydrogen bonds in water chains inhibit the reaction. Density functional theory calculations indicate that the effect of hydrogen bonds on the OH dissociation energy is likely the origin of this remarkable behavior. The results suggest that avoiding a strong hydrogen bond network between water molecules is crucial for water splitting.
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Affiliation(s)
- Wenshao Yang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics , 457 Zhongshan Road, Dalian 116023, Liaoning, P. R. China
| | - Dong Wei
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics , 457 Zhongshan Road, Dalian 116023, Liaoning, P. R. China
| | - Xianchi Jin
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics , 457 Zhongshan Road, Dalian 116023, Liaoning, P. R. China
| | - Chenbiao Xu
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics , 457 Zhongshan Road, Dalian 116023, Liaoning, P. R. China
| | - Zhenhua Geng
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics , 457 Zhongshan Road, Dalian 116023, Liaoning, P. R. China
| | - Qing Guo
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics , 457 Zhongshan Road, Dalian 116023, Liaoning, P. R. China
| | - Zhibo Ma
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics , 457 Zhongshan Road, Dalian 116023, Liaoning, P. R. China
| | - Dongxu Dai
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics , 457 Zhongshan Road, Dalian 116023, Liaoning, P. R. China
| | - Hongjun Fan
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics , 457 Zhongshan Road, Dalian 116023, Liaoning, P. R. China
| | - Xueming Yang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics , 457 Zhongshan Road, Dalian 116023, Liaoning, P. R. China
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25
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Shen Y, Deng GH, Ge C, Tian Y, Wu G, Yang X, Zheng J, Yuan K. Solvation structure around the Li+ ion in succinonitrile–lithium salt plastic crystalline electrolytes. Phys Chem Chem Phys 2016; 18:14867-73. [DOI: 10.1039/c6cp02878k] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The FTIR spectra and rotation decay of pure SN and Li–SN complex in LiBF4/SN solutions.
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Affiliation(s)
- Yuneng Shen
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Gang-Hua Deng
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Chuanqi Ge
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Yuhuan Tian
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Guorong Wu
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Xueming Yang
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Junrong Zheng
- College of Chemistry and Molecular Engineering
- Beijing National Laboratory for Molecular Sciences
- Peking University
- Beijing 100871
- China
| | - Kaijun Yuan
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
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26
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Chuntonov L. 2D-IR spectroscopy of hydrogen-bond-mediated vibrational excitation transfer. Phys Chem Chem Phys 2016; 18:13852-60. [DOI: 10.1039/c6cp01640e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Inter-molecular vibrational energy transfer in the hydrogen-bonded complexes of methyl acetate and 4-cyanophenol is studied by dual-frequency 2D-IR spectroscopy.
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Affiliation(s)
- Lev Chuntonov
- Schulich Faculty of Chemistry and Solid State Institute
- Technion – Israel Institute of Technology
- Haifa 32000
- Israel
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27
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Shen Y, Wu T, Jiang B, Deng G, Li J, Chen H, Guo X, Ge C, Chen Y, Hong J, Yang X, Yuan K, Zhuang W, Zheng J. Comparison Studies on Sub-Nanometer-Sized Ion Clusters in Aqueous Solutions: Vibrational Energy Transfers, MD Simulations, and Neutron Scattering. J Phys Chem B 2015; 119:9893-904. [DOI: 10.1021/acs.jpcb.5b04530] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuneng Shen
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
- University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Tianmin Wu
- Department
of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Bo Jiang
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Ganghua Deng
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Jiebo Li
- Department
of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Hailong Chen
- Department
of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Xunmin Guo
- Department
of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Chuanqi Ge
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
- School
of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China
| | - Yajing Chen
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Jieya Hong
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Xueming Yang
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Kaijun Yuan
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Wei Zhuang
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of the Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 Liaoning, China
| | - Junrong Zheng
- Department
of Chemistry, Rice University, Houston, Texas 77005, United States
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28
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Pan Z, Wu T, Jin T, Liu Y, Nagata Y, Zhang R, Zhuang W. Low frequency 2D Raman-THz spectroscopy of ionic solution: A simulation study. J Chem Phys 2015; 142:212419. [DOI: 10.1063/1.4917260] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Zhijun Pan
- Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Tianmin Wu
- Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
| | - Tan Jin
- State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Yong Liu
- State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Yuki Nagata
- Department for Molecular Spectroscopy, Max-Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Ruiting Zhang
- State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Wei Zhuang
- State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
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29
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Rubtsova NI, Nyby CM, Zhang H, Zhang B, Zhou X, Jayawickramarajah J, Burin AL, Rubtsov IV. Room-temperature ballistic energy transport in molecules with repeating units. J Chem Phys 2015; 142:212412. [PMID: 26049432 DOI: 10.1063/1.4916326] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In materials, energy can propagate by means of two limiting regimes: diffusive and ballistic. Ballistic energy transport can be fast and efficient and often occurs with a constant speed. Using two-dimensional infrared spectroscopy methods, we discovered ballistic energy transport via individual polyethylene chains with a remarkably high speed of 1440 m/s and the mean free path length of 14.6 Å in solution at room temperature. Whereas the transport via the chains occurs ballistically, the mechanism switches to diffusive with the effective transport speed of 130 m/s at the end-groups attached to the chains. A unifying model of the transport in molecules is presented with clear time separation and additivity among the transport along oligomeric fragments, which occurs ballistically, and the transport within the disordered fragments, occurring diffusively. The results open new avenues for making novel elements for molecular electronics, including ultrafast energy transporters, controlled chemical reactors, and sub-wavelength quantum nanoseparators.
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Affiliation(s)
- Natalia I Rubtsova
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA
| | - Clara M Nyby
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA
| | - Hong Zhang
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA
| | - Boyu Zhang
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA
| | - Xiao Zhou
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA
| | | | - Alexander L Burin
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA
| | - Igor V Rubtsov
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA
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30
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Yue Y, Qasim LN, Kurnosov AA, Rubtsova NI, Mackin RT, Zhang H, Zhang B, Zhou X, Jayawickramarajah J, Burin AL, Rubtsov IV. Band-Selective Ballistic Energy Transport in Alkane Oligomers: Toward Controlling the Transport Speed. J Phys Chem B 2015; 119:6448-56. [DOI: 10.1021/acs.jpcb.5b03658] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuankai Yue
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Layla N. Qasim
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Arkady A. Kurnosov
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Natalia I. Rubtsova
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Robert T. Mackin
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Hong Zhang
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Boyu Zhang
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Xiao Zhou
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | | | - Alexander L. Burin
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
| | - Igor V. Rubtsov
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, United States
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31
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Description of cross-peaks induced by intermolecular vibrational energy transfer in two-dimensional infrared spectroscopy. Chem Phys 2015. [DOI: 10.1016/j.chemphys.2015.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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32
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Chen H, Bian H, Li J, Wen X, Zhang Q, Zhuang W, Zheng J. Vibrational Energy Transfer: An Angstrom Molecular Ruler in Studies of Ion Pairing and Clustering in Aqueous Solutions. J Phys Chem B 2015; 119:4333-49. [DOI: 10.1021/jp512320a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hailong Chen
- Department
of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
| | - Hongtao Bian
- Department
of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
| | - Jiebo Li
- Department
of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
| | - Xiewen Wen
- Department
of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
| | - Qiang Zhang
- Institute of Chemistry,
Chemical Engineering and Food Safety, Bohai University, Jinzhou 121000, People’s Republic of China
| | - Wei Zhuang
- State Key Laboratory
of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, People’s Republic of China
| | - Junrong Zheng
- Department
of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
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33
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Chen H, Zhang Q, Guo X, Wen X, Li J, Zhuang W, Zheng J. Nonresonant Energy Transfers Independent on the Phonon Densities in Polyatomic Liquids. J Phys Chem A 2015; 119:669-80. [DOI: 10.1021/jp511651t] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hailong Chen
- Department
of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
| | - Qiang Zhang
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of
Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, People’s Republic of China
- Institute
of Chemistry, Chemical Engineering and Food Safety, Bohai University, Jinzhou 121000, People’s Republic of China
| | - Xunmin Guo
- Department
of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
| | - Xiewen Wen
- Department
of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
| | - Jiebo Li
- Department
of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
| | - Wei Zhuang
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of
Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, People’s Republic of China
| | - Junrong Zheng
- Department
of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
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34
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Kwon Y, Lee C, Park S. Effect of ion–molecule interaction on fermi-resonance in acetonitrile studied by ultrafast vibrational spectroscopy. Chem Phys 2014. [DOI: 10.1016/j.chemphys.2014.10.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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35
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Sokolowsky KP, Bailey HE, Fayer MD. New divergent dynamics in the isotropic to nematic phase transition of liquid crystals measured with 2D IR vibrational echo spectroscopy. J Chem Phys 2014; 141:194502. [DOI: 10.1063/1.4901081] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
| | - Heather E. Bailey
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Michael D. Fayer
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
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36
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Chen H, Wen X, Li J, Zheng J. Molecular Distances Determined with Resonant Vibrational Energy Transfers. J Phys Chem A 2014; 118:2463-9. [DOI: 10.1021/jp500586h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Hailong Chen
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
| | - Xiewen Wen
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
| | - Jiebo Li
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
| | - Junrong Zheng
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005-1892, United States
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37
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Yuan K, Bian H, Shen Y, Jiang B, Li J, Zhang Y, Chen H, Zheng J. Coordination Number of Li+ in Nonaqueous Electrolyte Solutions Determined by Molecular Rotational Measurements. J Phys Chem B 2014; 118:3689-95. [DOI: 10.1021/jp500877u] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kaijun Yuan
- State key
Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Hongtao Bian
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Yuneng Shen
- State key
Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Bo Jiang
- State key
Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Jiebo Li
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Yufan Zhang
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Hailong Chen
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Junrong Zheng
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
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38
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Sokolowsky KP, Bailey HE, Fayer MD. Length Scales and Structural Dynamics in Nematogen Pseudonematic Domains Measured with 2D IR Vibrational Echoes and Optical Kerr Effect Experiments. J Phys Chem B 2014; 118:7856-68. [DOI: 10.1021/jp500144p] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | - Heather E. Bailey
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Michael D. Fayer
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
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39
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Zhang R, Zhuang W. Cation effect in the ionic solution optical Kerr effect measurements: A simulation study. J Chem Phys 2014; 140:054507. [PMID: 24511952 DOI: 10.1063/1.4863696] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ruiting Zhang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, People's Republic of China
| | - Wei Zhuang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, People's Republic of China
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40
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Chen H, Wen X, Guo X, Zheng J. Intermolecular vibrational energy transfers in liquids and solids. Phys Chem Chem Phys 2014; 16:13995-4014. [DOI: 10.1039/c4cp01300j] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Resonant and nonresonant intermolecular vibrational energy transfers in liquids and solids are measured and elucidated using two competing mechanisms.
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Affiliation(s)
- Hailong Chen
- Department of Chemistry
- Rice University
- Houston, USA
| | - Xiewen Wen
- Department of Chemistry
- Rice University
- Houston, USA
| | - Xunmin Guo
- Department of Chemistry
- Rice University
- Houston, USA
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41
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Sokolowsky KP, Fayer MD. Dynamics in the isotropic phase of nematogens using 2D IR vibrational echo measurements on natural-abundance 13CN and extended lifetime probes. J Phys Chem B 2013; 117:15060-71. [PMID: 24156524 DOI: 10.1021/jp4071955] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The long time scale orientational relaxation of nematogens in the isotropic phase is associated with the randomization of pseudonematic domains, which have a correlation length that grows as the isotropic-to-nematic phase transition temperature is approached from above. Here we begin to address the fast dynamics of the nematogen molecules within the domains using two-dimensional infrared (2D IR) vibrational echo experiments. The problems of performing ultrafast IR experiments in pure liquids are discussed, and solutions are presented. In addition, the issue of short vibrational lifetimes, which limit the ability of 2D IR experiments to examine dynamics over a wide range of times, is addressed. The experiments were performed on the nematogen 4-cyano-4'-pentylbiphenyl (5CB), with the CN stretch initially used as the vibrational probe. Although the CN stretch has a small transition dipole, because the sample is a pure liquid it is necessary to use an exceedingly thin sample to perform the experiments. The small sample volume leads to massive heating effects that distort the results. In addition, the high concentration in the pure liquid can result in vibrational excitation transfer that interferes with the measurements of structural dynamics, and the CN vibrational lifetime is very short (3.6 ps). These problems were overcome by performing the experiments on the natural-abundance (13)CN stretch (5(13)CB), which greatly reduced the absorbance, eliminating the heating problems; also, this stretch has a longer lifetime (7.9 ps). Experiments were also performed on benzonitrile, which showed that the heating problems associated with pure liquids are not unique to 5CB. Again, the problems were eliminated by conducting measurements on the (13)CN stretch, which has an even longer lifetime (20.2 ps) compared with the (12)CN stretch (5.6 ps). Finally, to extend the range of the dynamical measurements, 4-pentyl-4'-thiocyanobiphenyl (5SCB) was synthesized and studied as a dilute solute in 5CB. The CN stretch of 5SCB has a vibrational lifetime of 103 ps, which permits dynamical measurements to 200 ps, revealing the full range of fast structural dynamics in the isotropic phase of 5CB. It is shown that the 5SCB probe reports essentially the same dynamics as 5(13)CB on the short time scale that is observable with the 5(13)CB vibrational probe.
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Affiliation(s)
- Kathleen P Sokolowsky
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
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42
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Son H, Park KH, Kwak KW, Park S, Cho M. Ultrafast intermolecular vibrational excitation transfer from solute to solvent: Observation of intermediate states. Chem Phys 2013. [DOI: 10.1016/j.chemphys.2013.03.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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43
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Bian H, Chen H, Zhang Q, Li J, Wen X, Zhuang W, Zheng J. Cation effects on rotational dynamics of anions and water molecules in alkali (Li+, Na+, K+, Cs+) thiocyanate (SCN-) aqueous solutions. J Phys Chem B 2013; 117:7972-84. [PMID: 23763605 DOI: 10.1021/jp4016646] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Waiting time dependent rotational anisotropies of SCN(-) anions and water molecules in alkali thiocyanate (XSCN, X = Li, Na, K, Cs) aqueous solutions at various concentrations were measured with ultrafast infrared spectroscopy. It was found that cations can significantly affect the reorientational motions of both water molecules and SCN(-) anions. The dynamics are slower in a solution with a smaller cation. The reorientational time constants follow the order of Li(+) > Na(+) > K(+) ~/= Cs(+). The changes of rotational time constants of SCN(-) at various concentrations scale almost linearly with the changes of solution viscosity, but those of water molecules do not. In addition, the concentration-dependent amplitudes of dynamical changes are much more significant in the Li(+) and Na(+) solutions than those in the K(+) and Cs(+) solutions. Further investigations on the systems with the ultrafast vibrational energy exchange method and molecular dynamics simulations provide an explanation for the observations: the observed rotational dynamics are the balanced results of ion clustering and cation/anion/water direct interactions. In all the solutions at high concentrations (>5 M), substantial amounts of ions form clusters. The structural inhomogeneity in the solutions leads to distinct rotational dynamics of water and anions. The strong interactions of Li(+) and Na(+) because of their relatively large charge densities with water molecules and SCN(-) anions, in addition to the likely geometric confinements because of ion clustering, substantially slow down the rotations of SCN(-) anions and water molecules inside the ion clusters. The interactions of K(+) and Cs(+) with water or SCN(-) are much weaker. The rotations of water molecules inside ion clusters of K(+) and Cs(+) solutions are not significantly different from those of other water species so that the experimentally observed rotational relaxation dynamics are only slightly affected by the ion concentrations.
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Affiliation(s)
- Hongtao Bian
- Department of Chemistry, Rice University, Houston, Texas 77005, USA
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44
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Chen H, Bian H, Li J, Wen X, Zheng J. Relative Intermolecular Orientation Probed via Molecular Heat Transport. J Phys Chem A 2013; 117:6052-65. [DOI: 10.1021/jp312604v] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hailong Chen
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Hongtao Bian
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Jiebo Li
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Xiewen Wen
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Junrong Zheng
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
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45
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Li J, Bian H, Wen X, Chen H, Yuan K, Zheng J. Probing ion/molecule interactions in aqueous solutions with vibrational energy transfer. J Phys Chem B 2012; 116:12284-94. [PMID: 22984821 DOI: 10.1021/jp306369w] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Interactions between model molecules representing building blocks of proteins and the thiocyanate anion, a strong protein denaturant agent, were investigated in aqueous solutions with intermolecular vibrational energy exchange methods. It was found that thiocyanate anions are able to bind to the charged ammonium groups of amino acids in aqueous solutions. The interactions between thiocyanate anions and the amide groups were also observed. The binding affinity between the thiocyanate anion and the charged amino acid residues is about 20 times larger than that between water molecules and the amino acids and about 5-10 times larger than that between the thiocyanate anion and the neutral backbone amide groups. The series of experiments also demonstrates that the chemical nature, rather than the macroscopic dielectric constant, of the ions and molecules plays a critical role in ion/molecule interactions in aqueous solutions.
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Affiliation(s)
- Jiebo Li
- Department of Chemistry, Rice University, Houston, Texas 77005, USA
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46
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Chen H, Bian H, Li J, Wen X, Zheng J. Ultrafast multiple-mode multiple-dimensional vibrational spectroscopy. INT REV PHYS CHEM 2012. [DOI: 10.1080/0144235x.2012.733116] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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47
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Li J, Bian H, Chen H, Wen X, Hoang BT, Zheng J. Ion Association in Aqueous Solutions Probed through Vibrational Energy Transfers among Cation, Anion, and Water Molecules. J Phys Chem B 2012; 117:4274-83. [DOI: 10.1021/jp3053373] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Jiebo Li
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Hongtao Bian
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Hailong Chen
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Xiewen Wen
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Bryan T. Hoang
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Junrong Zheng
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
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48
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Borek J, Perakis F, Kläsi F, Garrett-Roe S, Hamm P. Azide–water intermolecular coupling measured by two-color two-dimensional infrared spectroscopy. J Chem Phys 2012; 136:224503. [DOI: 10.1063/1.4726407] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [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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Lin Z, Zhang N, Jayawickramarajah J, Rubtsov IV. Ballistic energy transport along PEG chains: distance dependence of the transport efficiency. Phys Chem Chem Phys 2012; 14:10445-54. [PMID: 22555778 DOI: 10.1039/c2cp40187h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Dual-frequency relaxation-assisted two-dimensional infrared (RA 2DIR) spectroscopy was used to investigate energy transport in polyethylene glycol (PEG) oligomers of different length, having 0, 4, 8, and 12 repeating units and end-labeled with azido and succinimide ester moieties (azPEGn). The energy transport initiated by excitation of the N≡N stretching mode of the azido group in azPEGn in CCl(4) at ca. 2100 cm(-1) was recorded by probing the C=O stretching modes (reporters) of the succinimide ester moiety. Sensitive to the excess energy delivered to the reporter modes, RA 2DIR permits observation of both the through-bond and through-solvent energy transport contributions. The cross-peak data involving the reporter modes with different thermal sensitivity and the data for mixtures of compounds permitted concluding that through-bond energy transport is the dominant mechanism for most cross peaks in all four azPEGn compounds. The through-bond energy transport time, evaluated as the waiting time at which the cross peak maximum is reached, was found to be linearly dependent on the chain length of up to 60 Å, suggesting a ballistic energy transport regime. The through-bond energy transport speed determined from the chain-length dependence of T(max) in CCl(4) is found to be ca. 450 m s(-1). The cross-peak amplitude at the maximum decays exponentially with the chain length; a characteristic decay distance is found to be 15.7 ± 1 Å. The cross-peak amplitude at zero waiting time, determined by the end-to-end distance distribution, is found to decay with the chain length (L) as ∼L(-1.4), which is close to predictions of the free flight chain model. The match indicates that the end-group interaction does not strongly perturb the end-to-end distribution, which is close to the ideal random coil distribution with the Gaussian probability density.
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Affiliation(s)
- Zhiwei Lin
- Department of Chemistry, Tulane University, New Orleans, LA 70118, USA
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50
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Constant-speed vibrational signaling along polyethyleneglycol chain up to 60-Å distance. Proc Natl Acad Sci U S A 2012; 109:1413-8. [PMID: 22307593 DOI: 10.1073/pnas.1116289109] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A series of azido-PEG-succinimide ester oligomers with a number of repeating PEG units of 0, 4, 8, and 12 (azPEG0, 4, 8, and 12) was investigated using a relaxation-assisted two-dimensional infrared (RA 2DIR) spectroscopy method. The RA 2DIR method relies on the energy transport in molecules and is capable of correlating the frequencies of vibrational modes separated by large through-bond distances. Excitation of the azido group in the compounds at ca. 2,100 cm(-1) generates an excess energy which propagates in the molecule as well as dissipates into the solvent. We discovered that a part of the excess energy propagates ballistically via the covalent backbone of the molecules with a constant speed of ca. 550 m/s. The transport is described as a propagation of a vibrational wavepacket having a mean-free-path length of 10-15 Å. The discovery has the potential for developing new efficient signal transduction strategies for molecular electronics and biochemistry. It also permits extending the distances accessible in RA 2DIR structural measurements up to ca. 60 Å.
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