Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of structural chemistry 26 (1985), S. 546-552 
    ISSN: 1573-8779
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. A model potential of the hydrogen bond in water dimer can be represented in the form of a sum of long-range charge-dipole attraction, short-range attraction, and exponential repulsion. Here, by a proper selection of parameters, a good description can be given for the dependence of the bond energy on the interatomic distance R. 2. The presence of a finite zero energy of the proton and the coupled character of the atomic vibrations in the H2O molecule lead to a certain redetermination of the parameters of the model potential V(r, R). In particular, the depth of the potential well for the O−H bond increases, as does the parmeter C of Coulomb attraction. 3. The relatively low-lying excited quantum levels of the proton and its analytical wave function can be obtained with an adequate degree of accuracy by means of a simplified potential V(r, R) that has the from of a Morse potential with parameters depending on the interatomic distance R. This simplified potential gives a correct reproduction of the form of V(r, R) close to the equilibrium position of the protonr≈r 0. 4. The dependence of the bond energy E(R) has the required form, with the radius of action of the forces of the hydrogen bond and their magnitude becoming slightly greater with increasing sequence number of excitation. In particular, the work of shortening the distance R from ∞ to Ro for the first excited state amounts to about 45% of the excitation energy.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of structural chemistry 26 (1985), S. 708-716 
    ISSN: 1573-8779
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of applied spectroscopy 2 (1965), S. 288-298 
    ISSN: 1573-8647
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The transport equation is solved for a scattering medium of finite thickness. A method is given for approximate derivation of the size distribution for the particles on the basis of multiple scattering. An appendix deals with the particular case of particles that are small in relation to the wavelength.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of applied spectroscopy 2 (1965), S. 111-121 
    ISSN: 1573-8647
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The radiation transfer equation for a semi -infinite scattering medium is solved. The solution provides information on the size distribution function of the scattering particles, starting from experimental data on the multiple scattering of electromagnetic radiation. A solution is obtained for the case where the probability of scattering is given by the solution of Mie's problem.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1572-8897
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mathematics
    Notes: Abstract In this paper, we discuss the problem of joint motion of interacting quantum and classical systems in the process of excitation transfer in a quantum subsystem.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of structural chemistry 24 (1984), S. 501-517 
    ISSN: 1573-8779
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of structural chemistry 27 (1986), S. 998-1003 
    ISSN: 1573-8779
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 62 (1997), S. 115-124 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Some types of atomic vibrations in a chain of the DNA type constructed of G-C pairs were studied. These are the atomic vibrations of the lateral groups of guanine and N(3)H(1)H(2) of cytosine connected by the hydrogen bond h-b-1 and the vibrations of the centers of masses of bases in the direction parallel to bonds h-b-i, i = 1-3. The vibrations mix partially due to the dependence of the energy of the bond h-b-1 on its length and split into two bands because of the interaction between neighboring base pairs. It was shown that the excitation of the bond h-b-1 results in the splitting off of the two local vibrations and in a small deformation of the chain in the vicinity of the pair with the localized hydrogen bond. The law of the dispersion of band vibrations, values of the split-off frequencies, and degree of poly(dG)-poly(dC) chain deformation were determined. © 1997 John Wiley & Sons, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...