Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Rainer Herzschuh"'
Publikováno v:
Zeitschrift für Chemie. 30:157-168
The fragmentation of metastable and collisionally activated ions as well as different experimental techniques which can be used to record daughter, parent and neutral loss spectra are discussed in the first part of this review. Advanced MS/MS methods
Publikováno v:
Rapid Communications in Mass Spectrometry. 20:2293-2302
In order to develop a liquid chromatography/electrospray ionisation tandem mass spectrometry (LC/ESI-MS/MS) method for identification and quantification of polar metabolites of explosives using a triple quadrupole system, the mass spectrometric ionis
Autor:
Alexey A. Goryunkov, Thomas Drewello, Rainer Herzschuh, Holm Frauendorf, Steven H. Strauss, Olga V. Boltalina
Publikováno v:
Chemical Physics Letters. 405:93-96
Isolated dianions of highly fluorinated [60]fullerenes have been produced for the first time with direct electrospray ionization (ESI). Stable dianions have been observed by spraying extremely dilute solutions of neutral fluorofullerenes, which may e
Autor:
Rainer Herzschuh, Thomas Drewello
Publikováno v:
International Journal of Mass Spectrometry. 233:355-359
The collision-induced dissociations of small caesium iodide cluster ions of the type Cs(CsI) n + where n =3–7, have been investigated under low-energy multiple collision conditions. The collisions were performed in the rf-only quadrupole of a BEqQ
Publikováno v:
Chromatographia. 57:S147-S152
A HPLC-MS(MS) method is presented here for reaction monitoring of the oxidation of isothiazolium salts with H2O2/acetic acid. The comprehension of this mechanism was the aim of this work using several N-functionalized substances for the investigation
Publikováno v:
Zeitschrift für Chemie. 17:65-67
Massenspektrometrische Fragmentierung von Derivaten des 7-Mercapto-symm.-triazolo-(1,5-a)-pyrimidins
Publikováno v:
Zeitschrift für Chemie. 15:313-315
Autor:
† Yury Y. Vasil‘ev, Uwe Reuther, Thomas Drewello, Nigel L. Clipston, Mark P. Barrow, Tracy Brown, Rainer Herzschuh, and Andreas Hirsch
Publikováno v:
The Journal of Physical Chemistry A. 104:9171-9179
The formation of the nitrogen heterofullerene, C59N, following the ablation of a variety of fullerene derivatives, all of which possess organic ligands bound to the carbon cage through a nitrogen atom, has been investigated utilizing laser desorption
Autor:
Ilse C.H Maes, Peter J. L. M. Quaedflieg, Rainer Herzschuh, Alexander L. L. Duchateau, Hartmut Schedel, Quirinus B. Broxterman, Klaus Burger, William Bisson
Publikováno v:
Tetrahedron: Asymmetry. 11:2125-2131
Syntheses of (R)-4,4,4-trifluoro-2-mercaptobutyric acid from (S)-malic acid via a Mitsunobu reaction and from (rac)-thiomalic acid on enzymatic resolution, using Pseudomonas cepacia (Amano lipase PS), are described. A new method for direct determinat
Publikováno v:
Monatshefte für Chemie/Chemical Monthly. 131:463-473
Homochiral Nα-methyl-2,3-diaminopropionic and Nα-methyl-2,4-diaminobutyric acid derivatives 8a,b were obtained via a stereoconservative four-step synthesis starting from hexafluoroacetone protected L-aspartic and L-glutamic acid 2a,b, respectively.