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Tabi CB, Tagwo H, Kofané TC. Modulational instability in nonlinear saturable media with competing nonlocal nonlinearity. Phys Rev E 2022; 106:054201. [PMID: 36559471 DOI: 10.1103/physreve.106.054201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 10/10/2022] [Indexed: 11/06/2022]
Abstract
The modulational instability (MI) phenomenon is addressed in a nonlocal medium under controllable saturation. The linear stability analysis of a plane-wave solution is used to derive an expression for the growth rate of MI that is exploited to parametrically discuss the possibility for the plane wave to disintegrate into nonlinear localized light patterns. The influence of the nonlocal parameter, the saturation coefficient, and the saturation index are mainly explored in the context of a Gaussian nonlocal response. It is pointed out that the instability spectrum, which tends to be quenched by the high nonlocality parameter, gets amplified under the right choices of the saturation parameters, especially the saturation index. Via direct numerical simulations, confirmations of analytical predictions are given, where competing nonlocal and saturable nonlinearities enable the emergence of trains of patterns as manifestations of MI. The comprehensive parametric analysis carried out throughout the numerical experiment reveals the robustness of the obtained rogue waves of A- and B-type Akhmediev breathers, as the nonlinear signature of MI, providing the saturation index as a suitable tool to manipulate nonlinear waves in nonlocal media.
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Affiliation(s)
- Conrad Bertrand Tabi
- Department of Physics and Astronomy, Botswana International University of Science and Technology, Private Mail Bag 16 Palapye, Botswana
| | - Hippolyte Tagwo
- Laboratory of Mechanics, Department of Physics, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
| | - Timoléon Crépin Kofané
- Department of Physics and Astronomy, Botswana International University of Science and Technology, Private Mail Bag 16 Palapye, Botswana.,Laboratory of Mechanics, Department of Physics, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon.,Centre d'Excellence Africain en Technologies de l'Information et de la Communication, University of Yaoundé I, Cameroon
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2
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Kakinuma S, Shirota H. Femtosecond Raman-Induced Kerr Effect Study of Temperature-Dependent Intermolecular Dynamics in Molten Bis(trifluoromethylsulfonyl)amide Salts: Effects of Cation Species. J Phys Chem B 2018; 122:6033-6047. [DOI: 10.1021/acs.jpcb.8b03302] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Lu R, Wang W, Yu A. Cation and anion substitution effects on the ultrafast dynamics of interionic interaction in imidazolium based ionic liquids. Sci China Chem 2011. [DOI: 10.1007/s11426-011-4334-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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4
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Hershberger MA, Moran AM, Scherer NF. New insights into response functions of liquids by electric field-resolved polarization emission time measurements. J Phys Chem B 2011; 115:5617-24. [PMID: 21449580 DOI: 10.1021/jp111796d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We resolve information about the dynamics of simple liquids that has been obscured in prior frequency and time-domain measurements by way of full field-resolved polarization emission time (FR-PET) measurements of carbon disulfide. The amplitude and phase of the field-resolved transient-grating signal is used to calculate a spectrogram of the signal field at each delay between the transient-grating (TG) pump and probe pulses. The temporal maximum of the spectrogram, defined to be the signal emission time, varies with pump-probe delay; it follows the convolution of the TG pulses while the pulses overlap and exhibits recurrences at times when the nuclear dynamics are the main component of the liquid material response. Since this is a third-order nonlinear spectroscopic method, the isotropic and anisotropic signals are constructed from the polarization tensor components. The frequency-integrated anisotropic component of the signal is equivalent to the signal measured in optical Kerr Effect (OKE) experiments. The FR-PET determination of the signal emission times is a direct measurement of the third-order nonlinear (polarizability) polarization and, hence provides new strong constraints on appropriate models of the liquid dynamics. Models for the material response function are used to calculate the signal emission times. In particular, we show that the proper treatment of the time-correlation function for orientational motion gives the best fit to the FR-PET data for rotational diffusional motion. We also establish that librational motion is not a short-time (coherent) motion that leads to rotational diffusion. Finally, we find that the Bucaro-Litovitz form for interaction-induced dynamics is not entirely correct for the CS(2) liquid we study. We suggest that the failing may result from the implicit assumption of two-body interactions, which is only appropriate for gases.
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Affiliation(s)
- Margaret A Hershberger
- Department of Chemistry and the James Frank Institute, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
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Smith NA, Meech SR. Optically-heterodyne-detected optical Kerr effect (OHD-OKE): Applications in condensed phase dynamics. INT REV PHYS CHEM 2010. [DOI: 10.1080/01442350110092701] [Citation(s) in RCA: 165] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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6
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Zhong Q, Fourkas JT. Shape and Electrostatic Effects in Optical Kerr Effect Spectroscopy of Aromatic Liquids. J Phys Chem B 2008; 112:15342-8. [DOI: 10.1021/jp805874s] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Qin Zhong
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, Maryland NanoCenter, University of Maryland, College Park, Maryland 20742 and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, Maryland 20742
| | - John T. Fourkas
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, Maryland NanoCenter, University of Maryland, College Park, Maryland 20742 and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, Maryland 20742
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7
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Zhong Q, Fourkas JT. Optical Kerr Effect Spectroscopy of Simple Liquids. J Phys Chem B 2008; 112:15529-39. [DOI: 10.1021/jp807730u] [Citation(s) in RCA: 129] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Qin Zhong
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, Maryland NanoCenter, University of Maryland, College Park, Maryland 20742, and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, Maryland 20742
| | - John T. Fourkas
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, Maryland NanoCenter, University of Maryland, College Park, Maryland 20742, and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, Maryland 20742
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Hunt NT, Turner AR, Wynne K. Inter- and intramolecular hydrogen bonding in phenol derivatives: a model system for poly-L-tyrosine. J Phys Chem B 2007; 109:19008-17. [PMID: 16853447 DOI: 10.1021/jp052964o] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The ultrafast dynamics of solutions of phenol and two phenol derivatives--hydroquinone (1,4-benzenediol) and pyrocatechol (1,2-benzenediol)--have been studied with Optically Heterodyne-Detected Optical Kerr-Effect (OHD-OKE) spectroscopy. The solvents, methanol and acetonitrile, were selected to provide strong and weak solvent-solute hydrogen-bonding interactions, respectively, while pyrocatechol features an intramolecular hydrogen bond. Together these provide a series of model systems for polypeptides such as polytyrosine, which facilitate the direct study of inter- and intramolecular hydrogen bonding. A broad contribution to the Raman spectral density of the methanol solutions at frequencies between 150 and 300 cm(-1) has been observed that is absent in acetonitrile. This contribution has been assigned to solvent-solute hydrogen-bond stretching vibrations. The OHD-OKE response of poly-L-tyrosine has been measured and was found to contain a similar contribution. Density functional theory geometry optimizations and normal mode calculations have been performed using the B3LYP hybrid functional and 6-311++G** basis set. These have yielded a complete assignment of the low-frequency Raman and far-infrared spectra of pyrocatechol for the first time, which has provided information on the nature of the intramolecular hydrogen bond of pyrocatechol.
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Affiliation(s)
- Neil T Hunt
- Department of Physics, University of Strathclyde, John Anderson Building, 107 Rottenrow East, Glasgow G4 0NG, Scotland, United Kingdom
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9
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Ratajska-Gadomska B, Bialkowski B, Gadomski W, Radzewicz C. Ultrafast optical Kerr effect spectroscopy of water confined in nanopores of the gelatin gel. J Chem Phys 2007; 126:184708. [PMID: 17508825 DOI: 10.1063/1.2730506] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report on the investigation of a short-time collective dynamics of water confined in the pores of the gelatin gel, using the femtosecond optical Kerr effect spectroscopy. The ultrafast responses of water molecules obtained in bulk liquid and in three concentrations of gelatin gels are explained theoretically, both in a long time and in a short time regime, taking into account all molecular motions. We prove that the contribution of molecules involved in tetrahedral, strongly H-bonded structures stabilizing the gel network increases with the gel concentration. On the other hand the long-time relaxation of water molecules is significantly slowed down in the gel pores.
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Affiliation(s)
- B Ratajska-Gadomska
- Laboratory of Physicochemistry of Dielectrics and Magnetics, Department of Chemistry, Warsaw University, ul. Zwirki i Wigury 101, 02-089 Warsaw, Poland.
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Shirota H, Wishart JF, Castner EW. Intermolecular Interactions and Dynamics of Room Temperature Ionic Liquids That Have Silyl- and Siloxy-Substituted Imidazolium Cations. J Phys Chem B 2007; 111:4819-29. [PMID: 17417895 DOI: 10.1021/jp067126o] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The intermolecular interactions and dynamics of novel ionic liquids with alkylsilyl and alkylsiloxy substitutions on the cations are studied by measuring the intermolecular vibrational spectra and reorientational dynamics using femtosecond Kerr effect methods. The new ionic liquids include 1-dimethylphenylsilylmethyl-3-methylimidazolium (PhSi-mim+), and 1-methyl-3-pentamethyldisiloxymethylimidazolium (SiOSi-mim+) cations paired with the bis(trifluoromethylsulfonyl)imide (NTf(2)-) anion. Measured ionic liquid viscosities are surprisingly low for such bulky cation substituents. DFT electronic structure calculations on the isolated ions provide additional information about the electrostatic interactions.
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Affiliation(s)
- Hideaki Shirota
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854-8087, USA.
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12
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Hunt NT, Kattner L, Shanks RP, Wynne K. The dynamics of water-protein interaction studied by ultrafast optical Kerr-effect spectroscopy. J Am Chem Soc 2007; 129:3168-72. [PMID: 17315992 DOI: 10.1021/ja066289n] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Changes in the ultrafast dynamics and terahertz Raman spectrum accompanying a helix-to-coil transition of a homo-polypeptide have been observed for the first time. Formation of the alpha-helix is associated with a shift to lower frequency of a broad Raman band attributable to solvent-peptide intermolecular hydrogen bonding. This band facilitates direct spectroscopic observation of so-called hydration water near a peptide and yields the first quantitative estimate of the time scale of the ultrafast dynamics in the solvation shell, which range from 0.18 to 0.33 ps (185-100 cm(-1)) depending on the secondary structure of the peptide. Such fast motions of solvent molecules have been referred to as the "lubricant of life" and are thought to play key roles in determining structure and activity of proteins.
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Affiliation(s)
- Neil T Hunt
- Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG, Scotland, United Kingdom.
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Hunt NT, Jaye AA, Meech SR. Ultrafast dynamics in complex fluids observed through the ultrafast optically-heterodyne-detected optical-Kerr-effect (OHD-OKE). Phys Chem Chem Phys 2007; 9:2167-80. [PMID: 17487314 DOI: 10.1039/b616078f] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The ultrafast molecular dynamics of complex fluids have been recorded using the optically-heterodyne-detected optical-Kerr-effect (OHD-OKE). The OHD-OKE method is reviewed and some recent refinements to the method are described. Applications to a range of complex fluids, including microemulsions, polymer melts and solutions, liquid crystal and ionic liquids are surveyed. The level of detail attainable with the OHD-OKE method in these complex fluids is discussed. The prospects for future experiments are discussed.
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Affiliation(s)
- Neil T Hunt
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, UK NR4 7TJ
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15
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Shelly KR, Golovich EC, Beck WF. Intermolecular Vibrational Coherence in Bacteriochlorophyllawith Clustered Polar Solvent Molecules. J Phys Chem B 2006; 110:20586-95. [PMID: 17034248 DOI: 10.1021/jp062909v] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We show that resonant impulsive excitation of the Qy absorption band of bacteriochlorophyll a (BChl) launches a rapidly damped (gamma < 200 fs) ground-state coherent wave-packet motion that arises from intermolecular modes with clustered solvent molecules. Femtosecond pump-probe, dynamic-absorption signals were obtained at room temperature with BChl solutions in pyridine, acetone, and 1-propanol. The vibrational coherence observed in the 0-800-fs regime is modeled in the time domain by two (or three, in the case of 1-propanol) modulation components with asymmetric, inhomogeneously broadened line shapes and frequencies in the 100-200-cm(-1) range. The mean frequency of the vibrational coherence exhibits at least a quadratic dependence on the dipole moment of the solvent molecules and a y-intercept in the 100-cm(-1) regime. This trend is modeled by an expression for the natural frequency of a "6-12" potential composed of attractive terms from van der Waals forces and a repulsive term from the exchange (Pauli exclusion) force. The model suggests that comparable contributions to the potential are provided by the dipole-dipole and London dispersion interactions. These results support the hypothesis that the low-frequency vibrational modes in the 100-cm(-1) regime that are coupled to the light-driven charge-separation reactions in the reaction center from purple bacteria are derived from intermolecular vibrational modes between the chromophores and the surrounding protein medium.
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Affiliation(s)
- Katherine R Shelly
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
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16
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Ratajska-Gadomska B, Białkowski B, Gadomski W, Radzewicz C. Ultrashort memory of the quasicrystalline order in water by optical Kerr effect spectroscopy. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.08.029] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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17
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Loughnane BJ, Scodinu A, Fourkas JT. Temperature-Dependent Optical Kerr Effect Spectroscopy of Aromatic Liquids. J Phys Chem B 2006; 110:5708-20. [PMID: 16539516 DOI: 10.1021/jp055627o] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ultrafast optical Kerr effect (OKE) spectroscopy has been used to study the temperature-dependent dynamics of five aromatic liquids: benzene, benzene-d(6), hexafluorobenzene, mesitylene, and 1,3,5-trifluorobenzene. The intermediate response time of all of the liquids was found to scale with the collective orientational correlation time, as has been observed for other simple liquids. The spectra of hexafluorobenzene, 1,3,5-trifluorobenzene, and mesitylene are qualitatively different from those of the other liquids and exhibit different behavior with temperature. These spectra allow us to assess the influence of different molecular parameters on the shape of the OKE spectrum. On the basis of these data, we propose a model that links the differences in the OKE spectra to corresponding differences in the local ordering of the liquids.
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Affiliation(s)
- Brian J Loughnane
- Eugene F. Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, USA
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Jaye AA, Hunt NT, Meech SR. Temperature- and solvation-dependent dynamics of liquid sulfur dioxide studied through the ultrafast optical Kerr effect. J Chem Phys 2006; 124:024506. [PMID: 16422610 DOI: 10.1063/1.2145760] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The ultrafast dynamics of liquid sulphur dioxide have been studied over a wide temperature range and in solution. The optically heterodyne-detected and spatially masked optical Kerr effect (OKE) has been used to record the anisotropic and isotropic third-order responses, respectively. Analysis of the anisotropic response reveals two components, an ultrafast nonexponential relaxation and a slower exponential relaxation. The slower component is well described by the Stokes-Einstein-Debye equation for diffusive orientational relaxation. The simple form of the temperature dependence and the agreement between collective (OKE) and single molecule (e.g., NMR) measurements of the orientational relaxation time suggests that orientational pair correlation is not significant in this liquid. The relative contributions of intermolecular interaction-induced and single-molecule orientational dynamics to the ultrafast part of the spectral density are discussed. Single-molecule librational-orientational dynamics appear to dominate the ultrafast OKE response of liquid SO2. The temperature-dependent OKE data are transformed to the frequency domain to yield the Raman spectral density for the low-frequency intermolecular modes. These are bimodal with the lowest-frequency component arising from diffusive orientational relaxation and a higher-frequency component connected with the ultrafast time-domain response. This component is characterized by a shift to higher frequency at lower temperature. This result is analyzed in terms of a harmonic librational oscillator model, which describes the data accurately. The observed spectral shifts with temperature are ascribed to increasing intermolecular interactions with increasing liquid density. Overall, the dynamics of liquid SO2 are found to be well described in terms of molecular orientational relaxation which is controlled over every relevant time range by intermolecular interactions.
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Affiliation(s)
- Andrew A Jaye
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, United Kingdom
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Elola MD, Ladanyi BM, Scodinu A, Loughnane BJ, Fourkas JT. Effects of Molecular Association on Polarizability Relaxation in Liquid Mixtures of Benzene and Hexafluorobenzene. J Phys Chem B 2005; 109:24085-99. [PMID: 16375401 DOI: 10.1021/jp054733n] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work we have studied the relaxation dynamics of the many-body polarizability anisotropy in liquid mixtures of benzene (Bz) and hexafluorobenzene (Hf) at room temperature by femtosecond optical heterodyne-detected Raman-induced Kerr effect spectroscopy (OHD-RIKES) experiments and molecular dynamics (MD) simulations. The computed polarizability response arising from intermolecular interactions was included using the first-order dipole-induced-dipole model with the molecular polarizability distributed over the carbon sites of each molecule. We found good qualitative agreement between experiments and simulations in the features exhibited by the nuclear response function R(t) for pure liquids and mixtures. The long-time diffusive decay of R(t) was observed to vary substantially with composition, slowing down noticeably with dilution of each of the species as compared with that in the corresponding pure liquids. MD simulation shows that the effect on R(t) is due to the formation of strong and localized intermolecular association between Bz and Hf species that hinder the rotational diffusive dynamics. The formation of these Bz-Hf complexes in the liquid mixtures also modifies the rotational diffusive dynamics of the component species in such a way that cannot be explained solely in terms of a viscosity effect. Even though the computed orientational diffusive relaxation times associated with Bz and Hf are larger by a factor of approximately 2 than those from experiments, we found similar trends in experiments and simulations for these characteristic times as a function of composition. Namely, the collective and single-molecule orientational correlation times associated with Bz are observed to grow monotonically with the dilution of Bz, while those corresponding to Hf species exhibit a maximum at the equimolar composition. We attribute the quantitative discrepancy between experiments and simulations to the use of the Williams potential, which seems to overestimate the intermolecular interactions and thus predicts not only a slower translational dynamics but also a slower rotational diffusion dynamics than in real fluids.
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Affiliation(s)
- M Dolores Elola
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA.
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Shirota H. Ultrafast Dynamics of Liquid Poly(ethylene glycol)s and Crown Ethers Studied by Femtosecond Raman-Induced Kerr Effect Spectroscopy. J Phys Chem B 2005; 109:7053-62. [PMID: 16851802 DOI: 10.1021/jp044125s] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Ultrafast molecular dynamics of liquid poly(ethylene glycol)s, tetra(ethylene glycol), penta(ethylene glycol), and poly(ethylene glycol) with the molecular weight of 600, and crown ethers, 12-crown-4 and 15-crown-5, have been investigated by means of femtosecond optical heterodyne-detected Raman-induced Kerr effect spectroscopy. Picosecond Kerr transients of poly(ethylene glycol)s and crown ethers are characterized by a biexponential function with the time constants of about 2 and 20 ps. Both the faster and slower time constants do not vary much among the five oligo(ethylene oxide)s. Femtosecond dynamics is discussed based on the Kerr (depolarized Raman) spectra obtained by Fourier transform deconvolution analysis of the high time resolution Kerr transients. The broad low-frequency band (0-200 cm(-1)) in the Kerr spectrum is analyzed by two Brownian oscillators. The spectral shapes of linear poly(ethylene glycol) and cyclic crown ether are very different. Both the low- and high-frequency Brownian oscillators for crown ethers show lower frequency and broader spectral features than those for poly(ethylene glycol)s. The comparison of the low-frequency spectra of poly(ethylene glycol)s and crown ethers shows that the low-frequency spectrum of 15-crown-5 is closer to that of poly(ethylene glycol)s than that of 12-crown-4 is. The difference of the low-frequency spectra between poly(ethylene glycol) and crown ether is discussed with the concepts of molecular conformation and liquid density. The features of the observed intramolecular vibrational bands are also correlated with the molecular conformations.
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Affiliation(s)
- Hideaki Shirota
- Department of General Systems Sciences, Graduate School of Arts & Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan.
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Shirota H. Ultrafast molecular dynamics of liquid aromatic molecules and the mixtures with CCl4. J Chem Phys 2005; 122:44514. [PMID: 15740274 DOI: 10.1063/1.1840420] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The ultrafast molecular dynamics of liquid aromatic molecules, benzene, toluene, ethylbenzene, cumene, and 1,3-diphenylpropane, and the mixtures with CCl(4) have been investigated by means of femtosecond optical heterodyne-detected Raman-induced Kerr effect spectroscopy. The picosecond Kerr transients of benzene, toluene, ethylbenzene, and cumene and the mixtures with CCl(4) show a biexponential feature. 1,3-Diphenylpropane and the mixtures with CCl(4) show triexponential picosecond Kerr transients. The slow relaxation time constants of the aromatic molecules and the mixtures with CCl(4) are qualitatively described by the Stoke-Einstein-Debye hydrodynamic model. The ultrafast dynamics have been discussed based on the Kerr spectra in the frequency range of 0-800 cm(-1) obtained by the Fourier transform analysis of the Kerr transients. The line shapes of the low-frequency intermolecular spectra located at 0-180 cm(-1) frequency range have been analyzed by two Brownian oscillators ( approximately 11 cm(-1) and approximately 45 cm(-1) peaks) and an antisymmetric Gaussian function ( approximately 65 cm(-1) peak). The spectrum shape of 1,3-diphenylpropane is quite different from the spectrum shapes of the other aromatic molecules for the low magnitude of the low-frequency mode of 1,3-diphenylpropane and/or an intramolecular vibration. Although the concentration dependences of the low- and intermediate-frequency intermolecular modes (Brownian oscillators) do not show a significant trend, the width of high-frequency intermolecular mode (antisymmetric Gaussian) becomes narrower with the higher CCl(4) concentration for all the aromatics mixtures with CCl(4). The result indicates that the inhomogeneity of the intermolecular vibrational mode in aromatics/CCl(4) mixtures is decreasing with the lower concentration of aromatics. The intramolecular vibrational modes of the aromatic molecules observed in the Kerr spectra are also shown with the calculation results based on the density functional theory.
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Affiliation(s)
- Hideaki Shirota
- Department of General Systems Sciences, Graduate School of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan.
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Hunt NT, Jaye AA, Hellman A, Meech SR. Ultrafast Dynamics of Styrene Microemulsions, Polystyrene Nanolatexes, and Structural Analogues of Polystyrene. J Phys Chem B 2003. [DOI: 10.1021/jp035624g] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Neil T. Hunt
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, United Kingdom
| | - Andrew A. Jaye
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, United Kingdom
| | - Alexander Hellman
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, United Kingdom
| | - Stephen R. Meech
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, United Kingdom
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23
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Turner DB, Ulness DJ. Factorized time correlation diagram analysis of Raman induced Kerr effect spectroscopy using noisy light. J Chem Phys 2003. [DOI: 10.1063/1.1619932] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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Toutounji MM. The interplay between Matsubara terms and the contribution from the bath modes to the low-temperature zero-phonon line shapes for weakly damped modes. Chem Phys 2003. [DOI: 10.1016/s0301-0104(03)00337-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Hunt NT, Jaye AA, Meech SR. Ultrafast Dynamics in Microemulsions: Optical Kerr Effect Study of the Dispersed Oil Phase in a Carbon Disulfide−Dodecyltrimethylammonium Bromide−Water Microemulsion. J Phys Chem B 2003. [DOI: 10.1021/jp022301w] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Neil T. Hunt
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, U.K
| | - Andrew A. Jaye
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, U.K
| | - Stephen R. Meech
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, U.K
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26
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Scodinu A, Fourkas JT. Intermolecular Dynamics and Structure of Carbon Disulfide in Isoviscous Alkane Solutions: An Optical Kerr Effect Study. J Phys Chem B 2002. [DOI: 10.1021/jp026359m] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alessandra Scodinu
- Eugene F. Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
| | - John T. Fourkas
- Eugene F. Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467
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27
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Toutounji M. Ohmic Brownian Oscillator Approach to Hole-Burning and Photon-Echo Spectroscopies. J Phys Chem A 2002. [DOI: 10.1021/jp025686r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Mohamad Toutounji
- College of Science, Department of Chemistry, United Arab Emirates University, Al-Ain, UAE
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28
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Paolantoni M, Ladanyi BM. Polarizability anisotropy relaxation in liquid ethanol: A molecular dynamics study. J Chem Phys 2002. [DOI: 10.1063/1.1494775] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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29
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Hyun BR, Dzyuba SV, Bartsch RA, Quitevis EL. Intermolecular Dynamics of Room-Temperature Ionic Liquids: Femtosecond Optical Kerr Effect Measurements on 1-Alkyl-3-methylimidazolium Bis((trifluoromethyl)sulfonyl)imides. J Phys Chem A 2002. [DOI: 10.1021/jp0141575] [Citation(s) in RCA: 169] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Byung-Ryool Hyun
- Departments of Chemistry and Biochemistry and of Physics, Texas Tech University, Lubbock, Texas 79409
| | - Sergei V. Dzyuba
- Departments of Chemistry and Biochemistry and of Physics, Texas Tech University, Lubbock, Texas 79409
| | - Richard A. Bartsch
- Departments of Chemistry and Biochemistry and of Physics, Texas Tech University, Lubbock, Texas 79409
| | - Edward L. Quitevis
- Departments of Chemistry and Biochemistry and of Physics, Texas Tech University, Lubbock, Texas 79409
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30
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Ziegler L, Jordanides X. Two-photon absorption resonance effects in the third-order responses of transparent liquids. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(01)01444-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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31
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Shirota H, Castner EW. Ultrafast dynamics in aqueous polyacrylamide solutions. J Am Chem Soc 2001; 123:12877-85. [PMID: 11749546 DOI: 10.1021/ja010290z] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have investigated the ultrafast dynamics of aqueous polyacrylamide ([-CH(2)CH(CONH(2))-](n), or PAAm) solutions using femtosecond optical heterodyne-detected Raman-induced Kerr effect spectroscopy (OHD-RIKES). The observed aqueous PAAm dynamics are nearly identical for both M(w) = 1500 and 10 000. Aqueous propionamide (CH(3)CH(2)CONH(2), or PrAm) solutions were also studied, because PrAm is an exact model for the PAAm constitutional repeat unit (CRU). The longest time scale dynamics observed for both aqueous PAAm and PrAm solutions occur in the 4-10 ps range. Over the range of concentrations from 0 to 40 wt %, the picosecond reorientation time constants for the aqueous PAAm and PrAm solutions scale linearly with the solution concentration, despite the fact that the solution shear viscosities vary exponentially from 1 to 264 cP. For a given value of solution concentration in weight percent, constant ratios of measured reorientation time constants for PAAm to PrAm are obtained. This ratio of PAAm to PrAm reorientation time constants is equal to the ratio of the volume for the PAAm constitutional repeat unit (-CH(2)CHCONH(2)-) to the molecular volume of PrAm. For these reasons, we assign the polymer reorientation dynamics to motions of the entire constitutional repeat unit, not only side group motions. Simple molecular dynamics simulations of H[-CH(2)CH(CONH(2))-](7)H in a periodic box with 180 water molecules support this assignment. Amide-amide and amide-water hydrogen-bonding interactions lead to strongly oscillatory femtosecond dynamics in the Kerr transients, peaking at 80, 410, and 750 fs.
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Affiliation(s)
- H Shirota
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, NJ 08854-8087, USA.
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32
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Constantine S, Gardecki JA, Zhou Y, Ziegler LD, Ji X, Space B. A Novel Technique for the Measurement of Polarization-Specific Ultrafast Raman Responses. J Phys Chem A 2001. [DOI: 10.1021/jp004277x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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33
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Potma EO, de Boeij WP, Wiersma DA. Femtosecond dynamics of intracellular water probed with nonlinear optical Kerr effect microspectroscopy. Biophys J 2001; 80:3019-24. [PMID: 11371474 PMCID: PMC1301485 DOI: 10.1016/s0006-3495(01)76267-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
A nonlinear optical Kerr effect (OKE) microscope was developed and used to elucidate the ultra-fast diffusive motions of intracellular water molecules. In the OKE microscope, a pump-induced birefringence is sensed by a delayed probe pulse within a spatially confined volume that measures 0.5 microm in the lateral direction and 4.0 microm along the axial coordinate. This microscope allows the recording of time-resolved Kerr signals, which reflect the ultra-fast structural relaxation of the liquid, exclusively from intracellular aqueous domains. Because relaxation occurs on a picosecond time scale, only local diffusive motions are probed. The microscopic OKE signal is therefore insensitive to long-time-scale hindered translational motions enforced by intracellular mechanical barriers but probes the intrinsic orientational mobility of water molecules in cells instead. The Kerr response as determined from single intact mammalian cells under physiological conditions shows a structural relaxation time of 1.35 ps, which is 1.7 times slower than the Kerr decay observed in pure water. The data indicate that the mobility of water molecules in cellular domains is moderately restricted due to the high intracellular content of proteins and solutes.
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Affiliation(s)
- E O Potma
- Ultrafast Laser and Spectroscopy Laboratory, Materials Science Center, University of Groningen, 9747 AG Groningen, The Netherlands
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34
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McMorrow D, Thantu N, Kleiman V, Melinger JS, Lotshaw WT. Analysis of Intermolecular Coordinate Contributions to Third-Order Ultrafast Spectroscopy of Liquids in the Harmonic Oscillator Limit. J Phys Chem A 2001. [DOI: 10.1021/jp002449k] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dale McMorrow
- Naval Research Laboratory, Code 6820, Washington, D.C. 20375
| | - Napoleon Thantu
- Naval Research Laboratory, Code 6820, Washington, D.C. 20375
| | - Valeria Kleiman
- Naval Research Laboratory, Code 6820, Washington, D.C. 20375
| | | | - William T. Lotshaw
- General Electric Research and Development Center, P.O. Box 8, Schenectady, New York 12301
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35
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Gardecki JA, Yu G, Constantine S, Peng J, Zhou Y, Ziegler LD. A unified treatment of ultrafast optical heterodyne detected and Z-scan spectroscopies. J Chem Phys 2001. [DOI: 10.1063/1.1342015] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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36
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Kikteva T, Star D, Lee AM, Leach GW, Papanikolas JM. Five wave mixing: surface-specific transient grating spectroscopy as a probe of low frequency intermolecular adsorbate motion. PHYSICAL REVIEW LETTERS 2000; 85:1906-1909. [PMID: 10970644 DOI: 10.1103/physrevlett.85.1906] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/1999] [Indexed: 05/23/2023]
Abstract
Surface-specific five wave mixing spectroscopy is used to examine adsorbate dynamics at the fused silica/air interface. Signals whose temporal response is significantly broader than the instantaneous fourth-order electronic polarizability are attributed to low frequency, adsorbate nuclear motion. Based on the dependence of these dynamics on the moment of inertia and their comparison with dynamics observed in liquids, the five wave mixing temporal response has been assigned to adsorbate intermolecular librational motion. Demonstration of this new fourth-order technique allows one, in principle, to extend all third-order nonlinear bulk-phase spectroscopies to surfaces and interfaces with specificity.
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Affiliation(s)
- T Kikteva
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada V5A 1S6
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37
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Smith NA, Meech SR. Ultrafast Dynamics of Polar Monosubstituted Benzene Liquids Studied by the Femtosecond Optical Kerr Effect. J Phys Chem A 2000. [DOI: 10.1021/jp993170a] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Neil A. Smith
- School of Chemical Sciences, University of East Anglia, Norwich NR4 7TJ, U.K
| | - Stephen R. Meech
- School of Chemical Sciences, University of East Anglia, Norwich NR4 7TJ, U.K
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38
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Loughnane BJ, Scodinu A, Farrer RA, Fourkas JT, Mohanty U. Exponential intermolecular dynamics in optical Kerr effect spectroscopy of small-molecule liquids. J Chem Phys 1999. [DOI: 10.1063/1.479544] [Citation(s) in RCA: 122] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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39
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Bartolini P, Ricci M, Torre R, Righini R, Sánta I. Diffusive and oscillatory dynamics of liquid iodobenzene measured by femtosecond optical Kerr effect. J Chem Phys 1999. [DOI: 10.1063/1.478773] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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40
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Zhou Y, Constantine S, Harrel S, Ziegler LD. The probe frequency dependence of nonresonant femtosecond pump–probe nuclear responses: Undercutting vibrational inhomogeneities. J Chem Phys 1999. [DOI: 10.1063/1.478489] [Citation(s) in RCA: 19] [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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41
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Solvent dynamics derived from optical Kerr effect, dielectric dispersion, and time-resolved stokes shift measurements: an empirical comparison. J Mol Liq 1998. [DOI: 10.1016/s0167-7322(98)00066-x] [Citation(s) in RCA: 146] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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42
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Ratajska-Gadomska B, Gadomski W, Wiewior P, Radzewicz C. A femtosecond snapshot of crystalline order in molecular liquids. J Chem Phys 1998. [DOI: 10.1063/1.476278] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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43
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Steffen T, Meinders NACM, Duppen K. Microscopic Origin of the Optical Kerr Effect Response of CS2−Pentane Binary Mixtures. J Phys Chem A 1998. [DOI: 10.1021/jp973422c] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thomas Steffen
- Ultrafast Laser and Spectroscopy Laboratory, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Nicole A. C. M. Meinders
- Ultrafast Laser and Spectroscopy Laboratory, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Koos Duppen
- Ultrafast Laser and Spectroscopy Laboratory, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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44
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Diffey WM, Homoelle BJ, Edington MD, Beck WF. Excited-State Vibrational Coherence and Anisotropy Decay in the Bacteriochlorophyll a Dimer Protein B820. J Phys Chem B 1998. [DOI: 10.1021/jp9723022] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- William M. Diffey
- Department of Chemistry, Vanderbilt University, 5134 Stevenson Center, P.O. Box 1822-B, Nashville, Tennessee 37235
| | - Bradley J. Homoelle
- Department of Chemistry, Vanderbilt University, 5134 Stevenson Center, P.O. Box 1822-B, Nashville, Tennessee 37235
| | - Maurice D. Edington
- Department of Chemistry, Vanderbilt University, 5134 Stevenson Center, P.O. Box 1822-B, Nashville, Tennessee 37235
| | - Warren F. Beck
- Department of Chemistry, Vanderbilt University, 5134 Stevenson Center, P.O. Box 1822-B, Nashville, Tennessee 37235
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45
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Constantine S, Zhou Y, Morais J, Ziegler LD. Dispersed Optical Heterodyne Detected Birefringence and Dichroism of Transparent Liquids. J Phys Chem A 1997. [DOI: 10.1021/jp971227s] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. Constantine
- Department of Chemistry, Boston University, Boston, Massachusetts 02215
| | - Y. Zhou
- Department of Chemistry, Boston University, Boston, Massachusetts 02215
| | - J. Morais
- Department of Chemistry, Boston University, Boston, Massachusetts 02215
| | - L. D. Ziegler
- Department of Chemistry, Boston University, Boston, Massachusetts 02215
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46
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Smith NA, Lin S, Meech SR, Yoshihara K. Ultrafast Optical Kerr Effect and Solvation Dynamics of Liquid Aniline. J Phys Chem A 1997. [DOI: 10.1021/jp964035q] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Neil A. Smith
- School of Chemical Sciences, University of East Anglia, Norwich NR4 7TJ, U.K
| | - Shujie Lin
- School of Chemical Sciences, University of East Anglia, Norwich NR4 7TJ, U.K
| | - Stephen R. Meech
- School of Chemical Sciences, University of East Anglia, Norwich NR4 7TJ, U.K
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47
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Farrer RA, Loughnane BJ, Deschenes LA, Fourkas JT. Level-dependent damping in intermolecular vibrations: Linear spectroscopy. J Chem Phys 1997. [DOI: 10.1063/1.473715] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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48
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Neelakandan M, Pant D, Quitevis EL. Structure and Intermolecular Dynamics of Liquids: Femtosecond Optical Kerr Effect Measurements in Nonpolar Fluorinated Benzenes. J Phys Chem A 1997. [DOI: 10.1021/jp964047b] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Manickam Neelakandan
- Department of Chemistry and Biochemistry and Department of Physics, Texas Tech University, Lubbock, Texas 79409
| | - Debi Pant
- Department of Chemistry and Biochemistry and Department of Physics, Texas Tech University, Lubbock, Texas 79409
| | - Edward L. Quitevis
- Department of Chemistry and Biochemistry and Department of Physics, Texas Tech University, Lubbock, Texas 79409
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49
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Neelakandan M, Pant D, Quitevis EL. Reorientational and intermolecular dynamics in binary liquid mixtures of hexafluorobenzene and benzene: femtosecond optical Kerr effect measurements. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(96)01440-6] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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50
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McMorrow D, Thantu N, Melinger JS, Kim SK, Lotshaw WT. Probing the Microscopic Molecular Environment in Liquids: Intermolecular Dynamics of CS2 in Alkane Solvents. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp9605717] [Citation(s) in RCA: 116] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | - Seong K. Kim
- Naval Research Laboratory, Washington, D.C. 20375
| | - William T. Lotshaw
- GE Research and Development, P.O. Box 8, RM. KWC-627, Schenectady, New York 12301
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