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1.
Studies on nitrogen iodine compounds. VII. The IR spectrum of nitrogen triiodide-1 ammonia in the range of N—I fundamental vibrations and the valence force constants of the N—I bonds New infrared spectra in the region 33—600 cm?1 of 14NI3 · 14NH3, 15NI3 · 15NH3 and 14NI3 · pyridine, respectively, have been obtained. In addition, the infrared spectrum of 14NI3 · 14ND3, which has been prepared for the first time, was obtained. All absorption frequencies can be coordinated on the ground of the molecule model for the NI3 scaffold with 5 atoms Z2XY2 of the symmetry C2v which has been proved by X ray examination. A set of force constants has been calculated by approximation. The various nitrogeniodine valence force constants are discussed. 相似文献
2.
M. Hofmann B.F. Kock T. Dreier H. Jander C. Schulz 《Applied physics. B, Lasers and optics》2008,90(3-4):629-639
This paper describes the applicability of laser-induced incandescence (LII) as a measurement technique for primary soot particle
sizes at elevated pressure. A high-pressure burner was constructed that provides stable, laminar, sooting, premixed ethylene/air
flames at 1–10 bar. An LII model was set up that includes different heat-conduction sub-models and used an accommodation coefficient
of 0.25 for all pressures studied. Based on this model experimental time-resolved LII signals recorded at different positions
in the flame were evaluated with respect to the mean particle diameter of a log-normal particle-size distribution. The resulting
primary particle sizes were compared to results from TEM images of soot samples that were collected thermophoretically from
the high-pressure flame. The LII results are in good agreement with the mean primary particle sizes of a log-normal particle-size
distribution obtained from the TEM-data for all pressures, if the LII signals are evaluated with the heat-conduction model
of Fuchs combined with an aggregate sub-model that describes the reduced heat conduction of aggregated primary soot particles.
The model, called LIISim, is available online via a web interface.
PACS 65.80.+n; 78.20.Nv; 42.62.-b; 47.70.Pq 相似文献
3.
Studies on Nitrogen Chlorine Compounds. X. N-Perchlorylaziridine, N-Perchlorylazetidine, and N-Adamantylperchloric Acid Amide by Aminolysis of Dichlorine Heptoxide By aminolysis of dichlorine heptoxide with aziridine (ethyleneimine), azetidine (trimethyleneimine), and adamantylamine (tricyclo(3.3.1.1.3,7)decane-1-amine) could be prepared three new N-perchloryl compounds. Furthermore several salts of N-adamantylperchloric acid amide were prepared. The compounds were characterized by i.r. and 1H-n.m.r. spectroscopy and by analysis. 相似文献
4.
The retention behaviour of the enantiomers of underivatized phenylglycine was studied on a Chirobiotic T column packed with amphoteric glycopeptide teicoplanin covalently bonded to the surface of silica gel. The retention and the selectivity of separation of the enantiomers increase with rising concentration of ethanol or of methanol in aqueous-organic mobile phases. The band profiles of the less retained L-phenylglycine are symmetrical, but the band profiles of the more strongly retained D-phenylglycine are tailing in all mobile phases tested. The band broadening does not diminish even at very low concentrations of phenylglycine, so that it cannot be attributed to possible column overload. The analysis of the band profile using the stochastic theory of chromatography suggests that the broadening can be attributed to at least two additional chiral centres of adsorption in the stationary phase contributing to the retention of the more strongly retained enantiomer in addition to the adsorption of the less retained one. This behaviour can be explained by the complex structure of the teicoplanin chiral stationary phase. 相似文献
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J. Harms G. Jander J. Wierciski R. Ammon K. Hinsberg und J. Courtois 《Fresenius' Journal of Analytical Chemistry》1937,111(1):30-34
Ohne Zusammenfassung 相似文献
8.
J. Pirsch O. Wallach R. J. W. Le Févre W. H. A. Webb L. Schmid L. Haschek D. G. Dervichian G. Jander A. Windel M. Volmer und H. Jörg 《Fresenius' Journal of Analytical Chemistry》1933,92(5-6):193-200
Ohne Zusammenfassung 相似文献
9.
W. Muchlinsky E. Rother G. Jander O. Pfundt E. Göte W. Schramek L. W. Janssen J. A. C. Teegan A. Schleicher W. Lüdicke E. Denina J. M. Preston N. Rae J. K. Rummel K. Schierjott J. M. Kolthoff T. Kameda L. Blumen J. Pucherna Fr. Hein H. Pauling 《Analytical and bioanalytical chemistry》1932,89(3-4):128-135
10.