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Wang H, Wang Z, Jian J, Jiang C, Pan L. The intermolecular polar bond interaction and coupling induced spectral splitting phenomenon for a binary mixture. Phys Chem Chem Phys 2023; 25:13999-14004. [PMID: 37194330 DOI: 10.1039/d3cp01391j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
To explain the polarization Raman noncoincidence effect of specific polar bonds and the noncoincidence phenomenon between FT-Raman and FT-IR spectra, aggregation-induced spectral splitting theory was proposed. In this paper, the vibration splitting theory was demonstrated using two strategies: improving the spectral resolution with cryogenic matrix isolation techniques and identifying cases where the coupling splitting is large enough to be distinguishable. The monomer and dimer splitting bands of acetone were detected when cryogenically isolated by the Ar matrix. Additionally, the polarization Raman and two-dimensional infrared spectra of a β-propiolactone (PIL)/CCl4 binary mixture were collected at room temperature, and the spectral splitting phenomenon was clearly observed. The dynamic transformation between the monomer and dimer could be achieved and detected by adjusting the PIL concentration. The observed splitting phenomenon was further confirmed by theoretical DFT calculations based on the monomer and dimer of PIL, as well as the FT-IR and FT-Raman spectra of PIL. Concentration-triggered 2D-COS synchronous and asynchronous spectra also confirmed the splitting phenomenon and the dilution kinetics of PIL/CCl4.
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Affiliation(s)
- Huigang Wang
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Gengwen Road, Hangzhou 311231, Zhejiang, P. R. China.
| | - Zian Wang
- College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jiwen Jian
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Gengwen Road, Hangzhou 311231, Zhejiang, P. R. China.
| | - Caiying Jiang
- College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Lanying Pan
- Shulan International Medical College, Zhejiang Shuren University, Hangzhou 310015, China
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2
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Wang Z, Yu K, Zhao Y, Xue J, Jiang C, Wang H, Wu H. Aggregation induced spectral splitting and Fermi resonance of Ethylene Carbonate in binary mixture. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 281:121593. [PMID: 35839693 DOI: 10.1016/j.saa.2022.121593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 06/04/2022] [Accepted: 07/01/2022] [Indexed: 06/15/2023]
Abstract
The vibration band of the ring stretching (ν14), the fundamental ring breathing (ν17) and the Fermi resonance band of carbonyl stretching mixing with the overtone of the ring breathing (ν5 + 2ν17) have been investigated in solid ethylene carbonate (EC) and EC/CH3CN and EC/CHCl3 binary mixture. Dimer structure with aggregation-induced spectral splitting model (AIS) was applied to calculate the vibration spectra using the B3LYP-D3/6-311+G (d,p) procedure. The noncoincidence effect (NCE) and concentration induced frequency shifts of the ν14 and ν5 could be well explained by AIS model based on the dimer structure. Four bands were observed with two in the isotropic and two in the anisotropic Raman spectra and their NCE value decreased with the decrease of EC volume fraction in the binary mixture, and finally disappeared. NCE value and the Fermi resonance constants of EC at different concentrations were calculated from the experimental data.
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Affiliation(s)
- Zian Wang
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Keji Yu
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Yanying Zhao
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jiadan Xue
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Caiying Jiang
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Huigang Wang
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Gengwen Road, Hangzhou 311231, Zhejiang, PR China.
| | - Huizhen Wu
- College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China.
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3
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Solvent controlled aggregation behavior of peptide bond simulant N-methylacetamide and vibrational coupling splitting theory. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116436] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Hosokawa S, Kamiyama T, Yoshida K, Yamaguchi T, Tsutsui S, Baron AQ. Collective dynamics of liquid acetone investigated by inelastic X-ray scattering. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115825] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Devi TG, Borah B. Non-coincidence effect study of NN-Dibutyl formamide in binary liquid mixtures. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Wang H, Xu H, Liu Q, Zheng X. The noncoincidence phenomenon of acetonylacetone CO stretching in a binary mixture and the aggregation-induced split theory. RSC Adv 2020; 10:30982-30989. [PMID: 35516043 PMCID: PMC9056351 DOI: 10.1039/d0ra02932g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 08/04/2020] [Indexed: 11/25/2022] Open
Abstract
This article aims to correlate the noncoincidence effect phenomenon with the aggregation state of acetylacetone CO stretching in a binary mixture. CO stretching noncoincidence effect (NCE) was observed not only between IR and Raman spectra but also between the isotropic and anisotropic Raman spectra of acetonylacetone. The difference in CO stretching wavenumbers of the isotropic and anisotropic Raman spectra (NCE value) in a binary mixture at different concentrations has been calculated. We found that both isotropic and anisotropic Raman wavenumbers of CO stretching increase with the dilution of acetonylacetone by CCl4 while the NCE value decreases. These noncoincidence and concentration effect phenomena seem to go against the quantum theory. Herein, we proposed an aggregation-induced split (AIS) model to explain the NCE phenomenon and concentration effect. The experimental data were consistent with the DFT calculations performed at the B3LYP-D3/6-311++G (d,p) levels based on the proposed model. The dynamics of transformation from monomers to an aggregated structure can be easily controlled by tuning the concentration. Solvent dependent experiments show that the value of NCE decreased with the increase of the solvent dielectric constant at the same concentration, which is in accordance with Logan's theory. Both the isotropic and anisotropic Raman wavenumbers of the CO stretch increase with the dilution of acetonylacetone by CCl4, while the separation between isotropic and anisotropic Raman wavenumbers (Δυ) decrease.![]()
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Affiliation(s)
- Huigang Wang
- Department of Chemistry
- Key Laboratory of Advanced Textiles Materials and Manufacture Technology of the Ministry of Education
- Engineering Research Center for Eco-Dyeing and Finishing of Textiles of the Ministry of Education
- Zhejiang Sci-Tech University
- Hangzhou 310018
| | - Hang Xu
- Department of Chemistry
- Key Laboratory of Advanced Textiles Materials and Manufacture Technology of the Ministry of Education
- Engineering Research Center for Eco-Dyeing and Finishing of Textiles of the Ministry of Education
- Zhejiang Sci-Tech University
- Hangzhou 310018
| | - Qiuna Liu
- Department of Chemistry
- Key Laboratory of Advanced Textiles Materials and Manufacture Technology of the Ministry of Education
- Engineering Research Center for Eco-Dyeing and Finishing of Textiles of the Ministry of Education
- Zhejiang Sci-Tech University
- Hangzhou 310018
| | - Xuming Zheng
- Department of Chemistry
- Key Laboratory of Advanced Textiles Materials and Manufacture Technology of the Ministry of Education
- Engineering Research Center for Eco-Dyeing and Finishing of Textiles of the Ministry of Education
- Zhejiang Sci-Tech University
- Hangzhou 310018
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7
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Ouyang H, Liu M, Zhao Y, Wang H, Zheng X. Noncoincidence Effects of Dimethyl Carbonate in Binary Mixtures Probed by Raman Spectroscopy: Experimental and DFT Calculations. ACS OMEGA 2019; 4:11074-11081. [PMID: 31460205 PMCID: PMC6648874 DOI: 10.1021/acsomega.9b00175] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 06/12/2019] [Indexed: 06/10/2023]
Abstract
The components of isotropic Raman and anisotropic Raman for dimethyl carbonate (DMC) dispersed in cyclohexane and acetone at different volume fractions were recorded separately. The noncoincidence effects (NCE) of the ν7(C=O) stretching mode were calculated accordingly. The NCE values (ΔνNCE) of the ν7(C=O) versus DMC volume fractions in the DMC/C6H12 mixtures exhibits a convex (upward) curvature pattern, while the ΔνNCE vs concentration in the DMC/CH3COCH3 mixtures exhibits a concave (downward) curvature. These different NCE behaviors in the different binary mixtures may arise from the solvent-induced aggregation character. Thus, monomer and dimer structures of DMC were optimized and the vibration spectra were obtained using density functional theory (DFT) calculations. An aggregation model was suggested to expound the DMC's characteristic NCE behavior and concentration effect. We found that the theoretical spectra from DFT/polarizable continuum model calculation based on the aggregation model is in accordance with our experimental data. Solvent-dependent experiments show the ΔνNCE values increase with the decrease of the solvent dielectric constant under the identical volume fractions.
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8
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Di Fonzo S, Bottari C, Brady JW, Tavagnacco L, Caterino M, Petraccone L, Amato J, Giancola C, Cesàro A. Crowding and conformation interplay on human DNA G-quadruplex by ultraviolet resonant Raman scattering. Phys Chem Chem Phys 2019; 21:2093-2101. [DOI: 10.1039/c8cp04728f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The G-quadruplex-forming telomeric sequence (TTAGGG)4TT was investigated by polarized Ultraviolet Resonance Raman Scattering (UVRR) at 266 nm.
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Affiliation(s)
- Silvia Di Fonzo
- Elettra-Sincrotrone Trieste S. C. p. A
- Science Park
- Trieste
- Italy
| | - Cettina Bottari
- Elettra-Sincrotrone Trieste S. C. p. A
- Science Park
- Trieste
- Italy
- Department of Physics
| | - John W. Brady
- Department of Food Science
- Cornell University
- Ithaca
- USA
| | - Letizia Tavagnacco
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- Trieste
- Italy
| | - Marco Caterino
- Department of Pharmacy
- University of Naples Federico II
- Naples
- Italy
| | - Luigi Petraccone
- Department of Chemical Sciences
- University of Naples Federico II
- Naples
- Italy
| | - Jussara Amato
- Department of Pharmacy
- University of Naples Federico II
- Naples
- Italy
| | | | - Attilio Cesàro
- Elettra-Sincrotrone Trieste S. C. p. A
- Science Park
- Trieste
- Italy
- Department of Chemical and Pharmaceutical Sciences
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9
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Local order and vibrational coupling of the C=O Stretching Mode of γ-Caprolactone in liquid binary mixtures. Sci Rep 2017; 7:12182. [PMID: 28939813 PMCID: PMC5610304 DOI: 10.1038/s41598-017-12030-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 09/01/2017] [Indexed: 11/08/2022] Open
Abstract
The isotropic and anisotropic parts Raman spectra of γ-Caprolactone in the binary mixture at different concentrations have been measured. The non-coincidence effect (NCE) of γ-Caprolactone was determined in carbon tetrachloride solution and DMSO solution. The NCE of the ν11(C=O) stretching mode in the γ-Caprolactone/DMSO mixtures exhibits a linear plot, in contrast to that in the γ-Caprolactone/CCl4 mixtures, which shows an upward (convex) curvature. The reduction and enhancement of the dimer structure (short-range orientational order) of γ-Caprolactone in the γ-Caprolactone/DMSO and γ-Caprolactone/CCl4 mixtures respectively may play a major role in shifting of peak frequencies, thus the geometries of monomer and dimer of γ-Caprolactone were calculated at the B3LYP-D3/6-311 G (d,p) level of theory. We proposed aggregated model to explain the γ-Caprolactone C=O vibration NCE phenomenon and its concentration effect and found it largely consistent with our experimental findings. Solvent dependent experiment show the value of NCE declined with the increase of the solvent dielectric constant under the same condition which is consistent with the Logan's theory.
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10
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Upadhyay G, Devi TG, Singh RK, Singh A, Alapati PR. Solvent dependent frequency shift and Raman noncoincidence effect of S=O stretching mode of Dimethyl sulfoxide in liquid binary mixtures. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 109:239-246. [PMID: 23542514 DOI: 10.1016/j.saa.2013.02.046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 02/18/2013] [Accepted: 02/20/2013] [Indexed: 06/02/2023]
Abstract
The isotropic and anisotropic Raman peak frequencies of S=O stretching mode of Dimethyl sulfoxide (DMSO) have been discussed in different chemical and isotopic solvent molecules using different mechanisms. The shifting of peak frequency in further dilution of DMSO with solvent molecule is observed for all solvents. Transition dipole - transition dipole interaction and hydrogen bonding may play a major role in shifting of peak frequencies. The non-coincidence effect (NCE) of DMSO was determined for all the solvents and compared with four theoretical models such as McHale's model, Mirone's modification of McHale's model, Logan's model and Onsager-Fröhlich dielectric continuum model respectively. Most of the theoretical models are largely consistent with our experimental data.
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Affiliation(s)
- Ganesh Upadhyay
- Department of Physics, North-Eastern Regional Institute of Science and Technology, Arunachal Pradesh 791 109, India
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11
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Döge G, Lindner D. Pressure Dependence of Resonant Intermolecular Vibrational Coupling etc.in Isotropic Raman Scattering of the v2 Mode of CH3I. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19900940341] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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The effect of microscopic inhomogeneities in acetone/methanol binary liquid mixtures observed through the Raman spectroscopic noncoincidence effect. J Mol Liq 2009. [DOI: 10.1016/j.molliq.2008.08.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Torii H. Scheme of detecting microscopic inhomogeneity in binary liquid mixtures utilizing resonantly coupled vibrational modes. J Chem Phys 2007; 127:054508. [PMID: 17688350 DOI: 10.1063/1.2759918] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Influence of microscopic inhomogeneity in binary liquid mixtures on their vibrational spectra is studied by doing calculations on a model liquid system. The concentration dependence of the noncoincidence effect (NCE), which is a feature of vibrational bands related to the intermolecular resonant coupling of vibrational modes, is analyzed. It is suggested that observation of convex behavior of the NCEs for the vibrational bands of both species, especially that of the less polar species, in a binary liquid mixture is an indication of the occurrence of microscopic inhomogeneity.
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Affiliation(s)
- Hajime Torii
- Department of Chemistry, School of Education, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan.
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14
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Affiliation(s)
- G. Döge
- a Institut für Physikalische und Theoretische Chemie , Technische Universität Braunschweig , Hans-Sommer-Straβe 10, 3300 , Braunschweig , Germany
| | - D. Schneider
- a Institut für Physikalische und Theoretische Chemie , Technische Universität Braunschweig , Hans-Sommer-Straβe 10, 3300 , Braunschweig , Germany
| | - A. Morresi
- b Laboratorio di Chimica Fisica , Università di Perugia , Via Elce di Sotto, 8, 06100 , Perugia , Italy
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15
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Musso M, Giorgini MG, Torii H, Dorka R, Schiel D, Asenbaum A, Keutel D, Oehme KL. The Raman non-coincidence effect of the 12CO stretching mode of liquid acetone in chemical and in isotopic mixtures. J Mol Liq 2006. [DOI: 10.1016/j.molliq.2005.11.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Devi TG, Kumar K. Anisotropy shift and Raman bandwidth studies in carbonyl containing molecule o-chlorobenzaldehyde: role of repulsive forces. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2005; 62:972-9. [PMID: 15950524 DOI: 10.1016/j.saa.2005.04.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2005] [Revised: 04/06/2005] [Accepted: 04/07/2005] [Indexed: 05/02/2023]
Abstract
The analysis of Raman anisotropy shift as a function of solvent concentration shows the weakening of pair interaction of the molecules due to the influence of solvent-induced perturbations. The present study deals with the effect of dielectric constant of the medium on the non-coincidence effect (anisotropy shift) and the role of van der Waals' volume on the anisotropic Raman bandwidth. The CO stretching vibration of o-chlorobenzaldehyde (OCBD) molecule was studied in various polar and non-polar solvents namely CCl4, CH3CN, C6H5Cl and CH3C6H5. The data on anisotropic bandwidth are interpreted using the van der Waals' volume within the framework of lineshape theory of Bratos and Tarjus, while the Onsager-Fröhlich model on non-coincidence effect has been tested. Our study shows that the repulsive potential of the type e-alphaR is playing an important role in the OCBD-solvent interactions. The vanishing of anisotropy shift (non-coincidence effect) on dilution may be explained on the basis of repulsive forces playing a significant role in solute-solvent interactions.
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Affiliation(s)
- Th Gomti Devi
- Department of Physics, North-Eastern Hill University, Shillong 793022, India
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17
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Torii H, Musso M, Giorgini MG. Time-Domain Theoretical Analysis of the Noncoincidence Effect, Diagonal Frequency Shift, and the Extent of Delocalization of the CO Stretching Mode of Acetone/Dimethyl Sulfoxide Binary Liquid Mixtures. J Phys Chem A 2005; 109:7797-804. [PMID: 16834157 DOI: 10.1021/jp052565t] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A time-domain method for simulating vibrational band profiles that simultaneously takes into account both the diagonal and off-diagonal effects is developed and applied to the C=O stretching bands of neat liquid acetone and the acetone/dimethyl sulfoxide (DMSO) binary liquid mixtures. By using this method, it is possible to examine the influence of liquid dynamics on the noncoincidence effect (NCE), which arises from the off-diagonal vibrational interactions, as well as the frequency shifts and band broadening, which are related to both the diagonal and off-diagonal effects. It is shown that the simulations for the C=O stretching bands of acetone in acetone/DMSO binary liquid mixtures on the basis of this method can reproduce the experimentally observed concave curvature of the concentration dependence of the NCE and the unusually large frequency shift of the anisotropic Raman band. The widths of the infrared, isotropic Raman, and anisotropic Raman bands calculated for neat liquid acetone are also in good agreement with those observed. Based on these calculations, the extent of delocalization of the C=O stretching vibrational motions is examined by referring to two quantitative measures of this property, one calculated in the frequency domain and the other in the time domain. It is shown that the extent of delocalization gets larger as the mole fraction of acetone increases, the C=O stretching vibrations being delocalized over a few tens of molecules in neat liquid acetone. It is also shown that the extent of delocalization is related to the quantity called NCE detectability, which is the ratio between the magnitude of NCE and the bandwidth. It is therefore suggested that the extent of delocalization of vibrational motions may be estimated from observable features of Raman band profiles.
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Affiliation(s)
- Hajime Torii
- Department of Chemistry, School of Education, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan.
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18
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Giorgini MG, Musso M, Torii H. Concentration-Dependent Frequency Shifts and Raman Spectroscopic Noncoincidence Effect of the CO Stretching Mode in Dipolar Mixtures of Acetone/Dimethyl Sulfoxide. Experimental, Theoretical, and Simulation Results. J Phys Chem A 2005; 109:5846-54. [PMID: 16833919 DOI: 10.1021/jp051067h] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The nu(C=O) Raman band frequencies of acetone have been analyzed to separate the contributions of the environmental effect and the vibrational coupling to the gas-to-liquid frequency shifts of this band and to elucidate the changes in these two contributions upon dilution in DMSO. We have measured the frequencies of the nu((12)C=O) band in acetone/DMSO binary mixtures, the nu((13)C=O) band of the acetone-(13)C=O present as a natural abundance isotopic impurity in these mixtures, and both the nu((12)C=O) and nu((13)C=O) bands in the acetone-(12)C=O/acetone-(13)C=O isotopic mixtures at infinite dilution. These frequencies are compared with those of the nu((12)C=O) band in the acetone/CCl(4) binary mixtures measured previously. We have found the following three points: (i) The negative environmental contribution for the nu((12)C=O) oscillator of acetone completely surrounded by DMSO is reduced in magnitude by +5.5 cm(-1) and +7.8 cm(-1) upon the complete substitution of DMSO with acetone and CCl(4) molecules, respectively, indicating the progressive reduction of the attractive forces exerted by the environment on the nu((12)C=O) mode of acetone. (ii) In DMSO and other solvents, the contribution of the vibrational coupling to the frequency of the isotropic Raman nu((12)C=O) band of acetone becomes progressively more negative with increasing acetone concentration up to a value of -5.5 cm(-1), while the contribution to the frequency of the anisotropic Raman band remains approximately unchanged. The only difference resides in the curvatures of the concentration dependencies of these contributions which depend on the relative solute/solvent polarity. (iii) The noncoincidence effect (separation between the anisotropic and isotropic Raman band frequencies) of the nu(C=O) mode in the acetone/DMSO mixtures exhibits a downward (concave) curvature, in contrast to that in the acetone/CCl(4) mixtures, which shows an upward (convex) curvature. This result is supported by MD simulations and by theoretical predictions and is interpreted as arising from the reduction and enhancement of the short-range orientational order of acetone in the acetone/DMSO and acetone/CCl(4) mixtures, respectively.
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Affiliation(s)
- Maria Grazia Giorgini
- Dipartimento di Chimica Fisica ed Inorganica, Università di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy.
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19
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Giorgini MG, Arcioni A, Polizzi C, Musso M, Ottaviani P. Relaxation processes of the liquid crystal ME6N in the isotropic phase studied by Raman scattering experiments. J Chem Phys 2004; 120:4969-79. [PMID: 15267359 DOI: 10.1063/1.1646372] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have investigated the Raman profiles of the nu(C[Triple Bond]N) and nu(C=O) vibrational modes of the nematic liquid crystal ME6N (4-cyanophenyl-4(')-hexylbenzoate) in the isotropic phase at different temperatures and used them as probes of the dynamics and structural organization of this liquid. The vibrational time correlation functions of the nu(C[Triple Bond]N) mode, rather adequately interpreted within the assumption of exponential modulation function (the Kubo-Rothschild theory), indicate that the system experiences an intermediate dynamical regime that gets only slightly faster with increasing temperature. However, this theory fails in predicting the non-exponential behavior that the time correlation functions manifest in the long time range (t>3 ps). For this reason we have additionally approached the interpretation of vibrational correlation functions in terms of the theory formulated by Rothschild and co-workers for locally structured liquids. The application of this theory reveals that the molecular dynamics in this liquid crystal in the isotropic phase is that deriving from a distribution of differently sized clusters, which narrows as the temperature increases. Even at the highest temperature reached in this study (87 degrees C above the nematic-isotropic transition), the liquid has not yet achieved the structure of the simple liquid and the dynamics has not reached the limit of the single channel process. The vibrational and orientational relaxations occur in very different time scales. The temperature independence of the orientational dynamics in the whole range from 55 degrees C to 135 degrees C has been referred to the nonhydrodynamic behavior of the system, arising when local pseudonematic structures persist for times longer than the orientational relaxation. The occurrence of the process of resonant vibrational energy transfer between the C=O groups of adjacent molecules has been revealed in the isotropic phase by a slightly positive Raman noncoincidence effect in the band associated with the nu(C=O) mode. A qualitative interpretation is tentatively given in terms of partial cancellation of contributions deriving from structures having opposite orientations of their C=O groups.
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Affiliation(s)
- Maria Grazia Giorgini
- Dipartimento di Chimica Fisica e Inorganica, Universita di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy.
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20
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Srivastava SK, Ojha AK, Koster J, Shukla M, Leszczynski J, Asthana B, Kiefer W. Isotopic dilution, self-association, and Raman non-coincidence in the binary system (CH3)2CO+(CD3)2CO reinvestigated by polarized Raman measurement and ab initio calculations. J Mol Struct 2003. [DOI: 10.1016/j.molstruc.2003.07.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Tauber MJ, Mathies RA. Structure of the aqueous solvated electron from resonance Raman spectroscopy: lessons from isotopic mixtures. J Am Chem Soc 2003; 125:1394-402. [PMID: 12553843 DOI: 10.1021/ja021134a] [Citation(s) in RCA: 119] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The structure and thermodynamics of the hydrated electron are probed with resonance Raman spectroscopy of isotopic mixtures of H(2)O and D(2)O. The strongly enhanced intramolecular bends of e(-)(H(2)O) and e(-)(D(2)O) produce single downshifted bands, whereas the e(-)(HOD) bend consists of two components: one slightly upshifted from the 1,446 cm(-1) bulk frequency to 1,457 cm(-1) and the other strongly downshifted to approximately 1,396 cm(-1). This 60 cm(-1) split and the 200 (120) cm(-1) downshifts of the OH (OD) stretch frequencies relative to bulk water reveal that the water molecules that are Franck-Condon coupled to the electron are in an asymmetric environment, with one proton forming a strong hydrogen bond to the electron. The downshifted bend and librational frequencies also indicate significantly weakened torsional restoring forces on the water molecules of e(-)(aq), which suggests that the outlying proton is a poor hydrogen bond donor to the surrounding solvent. A 1.6-fold thermodynamic preference of the electron for H(2)O is observed based on the relative intensities of the e(-)(H(2)O) and e(-)(D(2)O) bands in a 50:50 isotopic mixture. This equilibrium isotope effect is consistent with the downshifted vibrational frequencies and a relative reduction of the zero-point energy of H(2)O bound to the electron. Our results enhance the cavity model of the solvated electron and support only those models that contain water monomers as opposed to other molecular species.
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Affiliation(s)
- Michael J Tauber
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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MORRESI A, PAOLANTONI M, SASSI P, ALUIGI A. Non-coincidence effect and orientational dynamics in aromatic molecules. Mol Phys 2002. [DOI: 10.1080/00268970210161494] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Musso M, Torii H, Ottaviani P, Asenbaum A, Giorgini MG. Noncoincidence Effect of Vibrational Bands of Methanol/CCl4 Mixtures and Its Relation with Concentration-Dependent Liquid Structures. J Phys Chem A 2002. [DOI: 10.1021/jp021440a] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maurizio Musso
- Institut für Physik und Biophysik, Universität Salzburg, Hellbrunnerstrasse 34, A-5020 Salzburg, Austria, Department of Chemistry, School of Education, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan, and Dipartimento di Chimica Fisica ed Inorganica, Università di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
| | - Hajime Torii
- Institut für Physik und Biophysik, Universität Salzburg, Hellbrunnerstrasse 34, A-5020 Salzburg, Austria, Department of Chemistry, School of Education, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan, and Dipartimento di Chimica Fisica ed Inorganica, Università di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
| | - Paolo Ottaviani
- Institut für Physik und Biophysik, Universität Salzburg, Hellbrunnerstrasse 34, A-5020 Salzburg, Austria, Department of Chemistry, School of Education, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan, and Dipartimento di Chimica Fisica ed Inorganica, Università di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
| | - Augustinus Asenbaum
- Institut für Physik und Biophysik, Universität Salzburg, Hellbrunnerstrasse 34, A-5020 Salzburg, Austria, Department of Chemistry, School of Education, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan, and Dipartimento di Chimica Fisica ed Inorganica, Università di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
| | - Maria Grazia Giorgini
- Institut für Physik und Biophysik, Universität Salzburg, Hellbrunnerstrasse 34, A-5020 Salzburg, Austria, Department of Chemistry, School of Education, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan, and Dipartimento di Chimica Fisica ed Inorganica, Università di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy
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Cha S, Ham S, Cho M. Amide I vibrational modes in glycine dipeptide analog: Ab initio calculation studies. J Chem Phys 2002. [DOI: 10.1063/1.1483257] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Sassi P, Morresi A, Paolantoni M, Cataliotti RS. Structural and dynamical investigations of 1-octanol: a spectroscopic study. J Mol Liq 2002. [DOI: 10.1016/s0167-7322(01)00360-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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GIORGINI MG, MUSSO M, OTTAVIANI P. The non-coincidence effect in binary mixtures: is a sign inversion with dilution fake or reality? Mol Phys 2001. [DOI: 10.1080/00268970110058652] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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GIORGINI MG, MUSSO M, ASENBAUM A, DÖGE G. The non-coincidence effect in N,N-dimethylformamide-CCl4highly diluted binary mixtures. Experimental and theoretical results. Mol Phys 2000. [DOI: 10.1080/00268970009483349] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ultrafast anisotropy decay of coherent excitations and the non-coincidence effect for delocalized vibrational modes in liquids. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00536-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Kim YJ, Chang HC, Sullivan VS, Jonas J. Raman study of intramolecular frequency noncoincidence effect in dialkyl benzenedicarboxylates. J Chem Phys 1999. [DOI: 10.1063/1.480298] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kecki Z, Sokolowska A, Yarwood J. The influence of molecular local order on the non-coincidence Raman spectra of methanol in liquid mixtures. J Mol Liq 1999. [DOI: 10.1016/s0167-7322(99)00052-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Musso M, Torii H, Giorgini MG, Döge G. Concentration dependence of the band profile parameters for the ν3(12C=O) Raman band of acetone in acetone–CCl4 binary mixtures: Experimental and Monte Carlo simulation results and their interpretation. J Chem Phys 1999. [DOI: 10.1063/1.478881] [Citation(s) in RCA: 34] [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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Czeslik C, Jonas J. Effect of Pressure on Local Order in Liquid Dimethyl Sulfoxide. J Phys Chem A 1999. [DOI: 10.1021/jp984660q] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Claus Czeslik
- Department of Chemistry, School of Chemical Sciences, and Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, Illinois 61801
| | - Jiri Jonas
- Department of Chemistry, School of Chemical Sciences, and Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, Illinois 61801
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H. TORII M. MUSSO M. G. GIORGINI G.. The non-coincidence effect in highly diluted acetone-CCl 4binary mixtures II. Experimental, theoretical and Monte Carlo simulation results. Mol Phys 1998. [DOI: 10.1080/002689798167665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Kirillov SA. Interactions and picosecond dynamics in molten salts: a rewiew with comparison to molecular liquids. J Mol Liq 1998. [DOI: 10.1016/s0167-7322(98)00052-x] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Schweitzer-Stenner R, Sieler G, Mirkin NG, Krimm S. Intermolecular Coupling in Liquid and Crystalline States of trans-N-Methylacetamide Investigated by Polarized Raman and FT-IR Spectroscopies. J Phys Chem A 1998. [DOI: 10.1021/jp972408x] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Slager VL, Chang HC, Kim YJ, Jonas J. High-Pressure Raman Noncoincidence Effect and Conformation of Alkyl Side Chain in Alkyl Benzoates. J Phys Chem B 1997. [DOI: 10.1021/jp9718966] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vivian L. Slager
- Department of Chemistry, School of Chemical Sciences, and Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana−Champaign, 166 Roger Adams Laboratory, 600 S. Matthews, Urbana, Illinois 61801
| | - Hai-Chou Chang
- Department of Chemistry, School of Chemical Sciences, and Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana−Champaign, 166 Roger Adams Laboratory, 600 S. Matthews, Urbana, Illinois 61801
| | - Yoo Joong Kim
- Department of Chemistry, School of Chemical Sciences, and Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana−Champaign, 166 Roger Adams Laboratory, 600 S. Matthews, Urbana, Illinois 61801
| | - Jiri Jonas
- Department of Chemistry, School of Chemical Sciences, and Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana−Champaign, 166 Roger Adams Laboratory, 600 S. Matthews, Urbana, Illinois 61801
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Bartholomew R, Irish D. A study of the raman non-coincidence effect from methyl formate / methyl d-formate solutions. J Mol Liq 1997. [DOI: 10.1016/s0167-7322(97)00071-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Wallen S, Nikiel L, Yi J, Jonas J. Density and temperature study of the noncoincidence effect in liquid carbon disulfide. Chem Phys Lett 1994. [DOI: 10.1016/0009-2614(94)01023-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Torii H, Tasumi M. Local order and transition dipole coupling in liquid methanol and acetone as the origin of the Raman noncoincidence effect. J Chem Phys 1993. [DOI: 10.1063/1.465622] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Tukhvatullin F, Atakhodjaev A, Djumabaev A, Tashkenbaev U, Kleiner I, Osmanov S. The study of Raman spectra of chloroform CH vibrations in liquids. J Mol Liq 1992. [DOI: 10.1016/0167-7322(92)80061-l] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Fickenscher M, Purucker HG, Laubereau A. Resonant vibrational dephasing investigated by high-precision femtosecond CARS. Chem Phys Lett 1992. [DOI: 10.1016/0009-2614(92)85389-r] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Østergārd N, Christiansen PL, Faurskov Nielsen O. Ab initio investigation of vibrations in free and hydrogen bonded formamide. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0166-1280(91)85116-o] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Sun TF, Chan JB, Wallen SL, Jonas J. Raman noncoincidence effect of the carbonyl stretching mode in compressed liquid cyclic carbonates. J Chem Phys 1991. [DOI: 10.1063/1.460179] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Shelley V, Yarwood J. Raman spectroscopic studies on the interaction and dynamics of N,N-dimethylformamide in the liquid phase. The effect of isotopic dilution. Mol Phys 1991. [DOI: 10.1080/00268979100100991] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Blake NP. A quantum electrodynamical study of intermolecular line broadening and line shift. J Chem Phys 1990. [DOI: 10.1063/1.458987] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Döge G, Lindner D, Richter W, Schiel D. The effect of resonant vibrational coupling on the frequency of the ν2 mode of liquid methyl iodide in Raman scattering and infrared absorption. Chem Phys Lett 1990. [DOI: 10.1016/0009-2614(90)80138-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Shelley VM, Yarwood J. The noncoincidence effect in N,N-dimethylformamide - a comparison of theoretical predictions and experimental results. Chem Phys 1989. [DOI: 10.1016/0301-0104(89)87112-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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