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Volumn 110, Issue 2, 2006, Pages 976-987

Why does the intermolecular dynamics of liquid biphenyl so closely resemble that of liquid benzene? molecular dynamics simulation of the optical-kerr-effect spectra

Author keywords

[No Author keywords available]

Indexed keywords

COMPUTER SIMULATION; MOLECULAR DYNAMICS; OPTICAL KERR EFFECT; OSCILLATIONS; TORQUE; ULTRAFAST PHENOMENA;

EID: 31544483318     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp0558932     Document Type: Article
Times cited : (47)

References (73)
  • 45
    • 0013503640 scopus 로고
    • The molecular structure of biphenyl and the numerical values for the biphenyl potential parameters are taken from Baranyai, A.; Welberry, T. R. Mol. Phys. 1991, 73, 1317. Both this paper and ref 37 use the Williams potential in their simulations of condensed-phase biphenyl.
    • (1991) Mol. Phys. , vol.73 , pp. 1317
    • Baranyai, A.1    Welberry, T.R.2
  • 47
    • 2942554706 scopus 로고    scopus 로고
    • MOLDY uses a quaternion representation for the molecular Euler angles and propagates all the molecular coordinates via a modified Beeman predictor-corrector algorithm. Refson, K. MOLDY, release 2.16; 2001; (http://www.earth.ox.ac.uk/~keithr/moldy-manual/moldy.html).
    • (2001) MOLDY, Release 2.16
    • Refson, K.1
  • 49
    • 0021478523 scopus 로고
    • Refson, K. Physica 1985, 131B, 256.
    • (1985) Physica , vol.131 B , pp. 256
    • Refson, K.1
  • 52
    • 84906406755 scopus 로고    scopus 로고
    • Tensor invariants provide a higher level of configurational averaging than do the individual tensor elements
    • Tensor invariants provide a higher level of configurational averaging than do the individual tensor elements.
  • 53
    • 84906406756 scopus 로고    scopus 로고
    • When we use a single-site model for the polarizability in liquid biphenyl, we also find poor convergence of the dipole-induced-dipole series
    • When we use a single-site model for the polarizability in liquid biphenyl, we also find poor convergence of the dipole-induced-dipole series.
  • 56
    • 84906392001 scopus 로고    scopus 로고
    • Note that, unlike the approach adopted in ref 18, eq 2.8 does not include any intramolecular renormalization of the two biphenyl site polarizabilities
    • Note that, unlike the approach adopted in ref 18, eq 2.8 does not include any intramolecular renormalization of the two biphenyl site polarizabilities.
  • 58
    • 84906406757 scopus 로고    scopus 로고
    • note
    • Some of the amplitude of this peak may also come from direct low-frequency contributions from biphenyl z-axis rotation, a possibility that is symmetry forbidden in benzene. Such low-frequency contributions may also occur in other planar, or near-planar, molecules lacking the special symmetry of benzene.
  • 62
    • 84906363743 scopus 로고    scopus 로고
    • note
    • -4.
  • 65
    • 84906378091 scopus 로고    scopus 로고
    • note
    • The expression for the Einstein frequency, eq 4.12, is exact only if the liquid's imaginary frequencies are included in the density of state. However, including the imaginary, frequencies would severely limit the time span over which eq 4.11 remains accurate. In most applications, it is useful, and often quite accurate, to approximate the INM density of states by the normalized density of purely real modes. For liquid benzene under the conditions studied in ref 15, imaginary modes make up only 4.4% of the INM tumbling density of states.
  • 66
    • 84906378092 scopus 로고    scopus 로고
    • note
    • "Cylindrical" here to refers to a situation in which all the atoms either lie at a common distance from a rotational axis or on the axis itself. The reader may also note that many of the same arguments could be used to establish the invariance of the translational Einstein frequencies to molecular geometry. Here, though, the similarities with libration end. Translational dynamics is not nearly as well characterized by any single frequency, at least until one reaches the upper band edge.
  • 67
    • 0001654855 scopus 로고
    • The diffusive behavior of biphenyl has itself been the subject of a detailed OKE study: Deeg, F. W.; Payer, M. D. J. Chem. Phys. 1989, 90, 6893.
    • (1989) J. Chem. Phys. , vol.90 , pp. 6893
    • Deeg, F.W.1    Payer, M.D.2
  • 70
    • 84906406754 scopus 로고    scopus 로고
    • note
    • Our predictions for the near constancy of Einstein frequencies are predicated on the assumption that most of the molecule-to-molecule changes we are interested in involve changes in molecular geometry without significant changes in atomic mass. This assumption is, of course, not valid for simple isotopic substitutions. In such cases, our basic eq 4.16 model would predict that the Einstein frequencies should scale directly with the (inverse square roots of the) moments of inertia.
  • 71
    • 0001318268 scopus 로고
    • references therein
    • Although there was only a schematic microscopic interpretation proposed at the time, the suggestion that there could be a Gaussian distribution of librational oscillators (analogous to our eqs 4.13 and 4.14) was put forth by Lynden-Bell, R. M.; Steele, W. A. J. Phys. Chem. 1984, 88, 6514. (See also references therein).
    • (1984) J. Phys. Chem. , vol.88
    • Lynden-Bell, R.M.1    Steele, W.A.2
  • 72
    • 0032558943 scopus 로고    scopus 로고
    • Some of the quantitative implications of phenomenological librational oscillator pictures have been explored more recently by refs 5, 7, 13, 30, 31, and 35, and by Kamada, K.; Ueda, M.; Ohta, K.; Wang, Y.; Ushida, K.; Tominaga, Y. J. Chem. Phys. 1998, 109, 10948.
    • (1998) J. Chem. Phys. , vol.109 , pp. 10948
    • Kamada, K.1    Ueda, M.2    Ohta, K.3    Wang, Y.4    Ushida, K.5    Tominaga, Y.6
  • 73
    • 84906391999 scopus 로고    scopus 로고
    • In much the same way, one could say that the basic energy scale for molecular orbitals is set by atomic orbital energies
    • In much the same way, one could say that the basic energy scale for molecular orbitals is set by atomic orbital energies.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.