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Volumn 107, Issue 41, 2003, Pages 8638-8647

Infrared spectrum of p-benzoquinone in water obtained from a QM/MM hybrid molecular dynamics simulation

Author keywords

[No Author keywords available]

Indexed keywords

COMPUTER SIMULATION; DYES; FOURIER TRANSFORMS; HYDROGEN BONDS; INFRARED SPECTROSCOPY; MOLECULAR VIBRATIONS; PROBABILITY DENSITY FUNCTION; SOLVENTS;

EID: 0242365465     PISSN: 10895639     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp027747r     Document Type: Article
Times cited : (73)

References (47)
  • 15
    • 85176205821 scopus 로고    scopus 로고
    • note
    • A solute molecules is exposed to an external electrostatic field generated by the surrounding solvent molecules. The contributions to the field originating from rapid electron density fluctuations in the solvent molecules cause the attractive dispersion interaction. They are approximately homogeneous, isotropic, and are identical in polar and nonpolar solvents. Therefore, they do not specifically change the electron density and the associated force field within the solute. As a consequence, its vibrational modes are hardly affected by solvation in nonpolar solvents. In polar solvents, however, the additional contributions originating from the permanent dipoles in the structured and slowly fluctuating solvent shells add up to the field generated by the nuclei, to which, according to Born-Oppenheimer approximation, the electrons of the solute instantaneously adjust. These added fields generate the electronic polarization, and correspondingly, change the effective electronic potential of nuclear motion.
  • 32
    • 85176206304 scopus 로고    scopus 로고
    • note
    • These parameters were taken from the file parmallh3x.pro contained in the distribution of the MD program XPLOR 3.1 by A. Brünger, The Howard Hughes Medical Institute and Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, 1992. We do not consider the choice of the Lennard-Jones parameters to be critical for our purposes.
  • 39
    • 0000164395 scopus 로고
    • Crystallographic refinement by simulated annealing
    • Isaacs, N. W., Taylor, M. R., Eds.; Claredon Press: Oxford
    • Brünger, A. T. Crystallographic refinement by simulated annealing. In Crystallographic Computing 4: Techniques and New Technologies; Isaacs, N. W., Taylor, M. R., Eds.; Claredon Press: Oxford, 1988.
    • (1988) Crystallographic Computing 4: Techniques and New Technologies
    • Brünger, A.T.1
  • 45
    • 85176206929 scopus 로고    scopus 로고
    • note
    • To exclude other algorithmic causes, we have carefully checked by visual inspection that the MD trajectory of the dipole moment M(t) is everywhere smooth and bears no signatures of algorithmic noise, which might arise from the multiple time-step procedures applied for the integration of the Newtonian equations or from the multiple scale approach used for the computation of the electrostatics (see Eichinger for a discussion of accuracy issues in DFT/MM-MD simulations).
  • 47
    • 0012558538 scopus 로고    scopus 로고
    • Berechnung molekularer Eigenschaften in komplexer Lösungsmittelumgebung: Dichtefunktionaltheorie kombiniert mit einem Molekularmechanik-Kraftfeld
    • Thesis, Ludwig-Maximilians Universität München, Germany
    • Eichinger, M. Berechnung molekularer Eigenschaften in komplexer Lösungsmittelumgebung: Dichtefunktionaltheorie kombiniert mit einem Molekularmechanik-Kraftfeld, Thesis, Ludwig-Maximilians Universität München, Germany, 1999.
    • (1999)
    • Eichinger, M.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.