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pro vyhledávání: '"Werner A. P. Luck"'
Autor:
Werner A. P. Luck
Publikováno v:
Journal of Molecular Structure. 448:131-142
The cooperativity of H-bonds is a fundamental property in liquid water and alcohols. H-bond energies are in liquid water about 250% stronger compared with H-bonds of H2O monomers in solutions. Different spectroscopic techniques fundamental bands, ove
Publikováno v:
Journal of Molecular Structure. 416:287-296
This paper presents the results concerning anti-cooperativity effects between two H-bonds of a water molecule. The IR OH stretching band shifts Δν—as a measure of the H-bond energy—are compared for HOD with different bases B of 1:1 complexes B
Autor:
Dietmar Klein, Werner A. P. Luck
Publikováno v:
Journal of Molecular Structure. 381:83-94
The solvent influence on the strength of H-bonds, observed by the shift Δν of the OH or NH stretching band, can be described by a solvent parameter LFMj for every solvent j: Δν(B, solventj) = LMFj Δv(B, vapor). This parameter is independent of t
Autor:
Werner A. P. Luck, L. England-Kretzer
Publikováno v:
Journal of Molecular Structure. 348:373-376
A band analysis of the IR spectra of CH3OH and CH3OD in 1,4-dioxane and tetrahydrofurane in the first overtone region was performed in order to resolve the overlapping subbands. The results show a splitting of the OH and OD stretching vibrations into
Autor:
M. Fritzsche, Werner A. P. Luck
Publikováno v:
Journal of Molecular Structure. 295:47-51
We have observed simultaneous absorptions in H-bonded liquid methanol. They point to two different H-bonded OH groups and their temperature dependent equilibrium. Their intensities depend on the H-bond orientation.
Autor:
Thomas Wess, Werner A. P. Luck
Publikováno v:
Canadian Journal of Chemistry. 69:1819-1826
The OH potentials of the complexes [Formula: see text] are calculated by an ab initio MO-LCAO-SCF-CISD method with a 6-31G** basis set for 30 different [Formula: see text] distances. The resulting OH vibration levels are calculated by the so-called s
Autor:
Werner A. P. Luck, T. Wess
Publikováno v:
Chemical Physics Letters. 179:303-310
The nearly linear temperature-density ( T-p ) dependence of crystalline rare gases is described by an idealized model. The semiclassical Planck-Sommerfeld method applied to the sum of Lennard-Jones interactions indicates at low T an increase of the s
Publikováno v:
Journal of Molecular Structure. 237:233-247
In ternary systems of H-bonded complexes of perfluoro-tert.-butanol (PFTB) with propionitrile, acetone, dioxane or tetrahydrofuran dissolved in polychlorotrifluoroethene (PCFE), increase of pressure induces (1) an increase of the OH frequency shift 1
Publikováno v:
Journal of Molecular Structure. 224:185-202
The intermolecular effects on the OH stretching mode of perfluoro-t-butanol/acetonitrile (PFTB/AN) complexes have been studied in the vapour phase, different low temperature matrices, liquid and different solvents and are compared with effects on PFT
Autor:
Werner A. P. Luck, Stefan Peil
Publikováno v:
Journal of Molecular Structure. 224:175-184
The frequency shift Δν of the perfluoro-t-butyl alcohol (PFTB) OH stretching in low temperature rare gas matrices has been studied. Δν depends on the square root of the critical temperature of the rare gases ( T C2 ) 1 2 . Other matrix results fo