A STUDY OF PROTONATED MOLECULES OF CROWN-ETHERS CONTAINING 2 THIOUREASEGMENTS BY COLLISION-INDUCED DISSOCIATION MASS-ANALYZED ION KINETIC-ENERGY SPECTROMETRY

Authors
KRALJ B TIMOFEEV OS ZIGON D KIRICHENKO TI MARSEL J
Citation
B. Kralj et al., A STUDY OF PROTONATED MOLECULES OF CROWN-ETHERS CONTAINING 2 THIOUREASEGMENTS BY COLLISION-INDUCED DISSOCIATION MASS-ANALYZED ION KINETIC-ENERGY SPECTROMETRY, Rapid communications in mass spectrometry, 9(2), 1995, pp. 160-166
Citations number
22
Categorie Soggetti
Spectroscopy,"Chemistry Analytical
Journal title
Rapid communications in mass spectrometry → ACNP
ISSN journal
09514198
Volume
9
Issue
2
Year of publication
1995
Pages
160 - 166
Database
ISI
SICI code
0951-4198(1995)9:2<160:ASOPMO>2.0.ZU;2-B
Abstract
Fast atom/ion bombardment mass spectrometry was used to investigate th e structures of protonated molecules of macrocyclic nitrogen-containin g crown ethers with two polyoxyethylene chains linked by two thiourea groups. The collision-induced dissociation (CID) of their MH(+) ions, using the mass analysed ion kinetic energy (MIKE) spectrometry method reveals four clearly defined competitive fragmentations. The product-i on intensities clearly show that, in the MH(+) ions of asymmetric crow n ethers, the proton is preferentially located in the region of the lo nger polyoxyethylene chain. The characteristics of CID MIKE spectra of isomeric crown ethers are discussed.