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71.
72.
L. Liebermann 《Fresenius' Journal of Analytical Chemistry》1892,31(1):418
Ohne Zusammenfassung 相似文献
73.
Leo Liebermann 《Fresenius' Journal of Analytical Chemistry》1875,14(1):359-360
Ohne Zusammenfassung 相似文献
74.
Leo Liebermann 《Fresenius' Journal of Analytical Chemistry》1879,18(1):105-106
Ohne Zusammenfassung 相似文献
75.
K.D. Setzer W. Zyrnicki A.M. Pravilov E.H. Fink K.K. Das H.-P. Liebermann R.J. Buenker 《Journal of Molecular Spectroscopy》2003,217(1):127-141
Gas phase emission spectra of the hitherto unknown free radical PbLi have been measured in the NIR range with a Fourier-transform spectrometer. The emissions were observed from a fast flow system in which lead vapor in argon carrier gas was passed through a microwave discharge and mixed with lithium vapor in an observation tube. Five electronic transitions have been found in the wavenumber range 3800-10 000 cm−1. Bands from two excited states to the ground state were measured at high spectral resolution such that rotational analyses could be performed and accurate molecular parameters derived. In order to aid in the analysis of the experimental data, a series of relativistic configuration interaction calculations has been carried out to obtain potential curves for the low-lying states of PbLi and also electric dipole transition moments connecting them. As in the lighter molecules of this group, CLi and SiLi, the ground state of PbLi is found to be 3/2) with a spin splitting of about 2000 cm−1. The first excited state is (A 1/2), and two observed band systems are assigned to the transitions A→X1 and A→X2. Two more excited states, (B 3/2) and C 1/2, are identified from the observed spectra with the help of the computed data, and their spectroscopic constants are determined. In contrast to PbH and PbF, the ab initio results indicate a very complicated low-energy electronic structure for the PbLi radical, with 19 bound electronic states calculated to lie below 3 eV. 相似文献
76.
77.
Löbbus M Sonnfeld J van Leeuwen HP Vogelsberger W Lyklema J 《Journal of colloid and interface science》2000,229(1):174-183
The surface electric properties of the commercially available silica, Monospher 1000 (Fa. Merck), have been studied by conductivity and ESA (electrokinetic sonic amplitude) experiments. It could be shown that accounting for the contribution of the stagnant layer to surface conductivity is indispensable in the interpretation of electrokinetic data at low ionic strength. A general method has been put forward which allows to take into account the total, experimentally accessible surface conductivity in the evaluation of ESA data of moderately concentrated suspensions. This includes additional conductivity measurements which serve for the independent estimation of the total relative surface conductivity. The resulting zeta-potentials are clearly higher than those obtained after neglecting the contribution of the stagnant layer to surface conductivity. In addition, the ionic mobilities of potassium and magnesium in the hydrodynamically stagnant layer have been investigated in some detail. It has been found that the ionic mobility of potassium is of the same order of magnitude as in the bulk solution while the mobility of magnesium is significantly reduced. Copyright 2000 Academic Press. 相似文献
78.
79.
Leo Liebermann 《Fresenius' Journal of Analytical Chemistry》1884,23(1):476-486
Ohne Zusammenfassung 相似文献
80.