scholarly journals Excitons and the Positronium Negative Ion: Comparison of Spectroscopic Properties

Excitons ◽  
2018 ◽  
Author(s):  
Sabyasachi Kar ◽  
Yew Kam Ho
Keyword(s):  
Spectroscopic Properties ◽  
Negative Ion

Synthesis and fast atom bombardment mass spectrometry of the coordination complexes of the ligand 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane

1989 ◽  
Vol 67 (5) ◽  
pp. 797-803 ◽  
Author(s):  
Cindy Lee MacLaurin ◽  
Jack Martin Miller ◽  
Mary Frances Richardson
Keyword(s):  
Mass Spectrometry ◽  
Mass Spectra ◽  
Fast Atom Bombardment ◽  
Spectroscopic Properties ◽  
Coordination Complexes ◽  
Negative Ion ◽  
Successful Technique ◽  
Negative Ion Mode ◽  
Positive Ion ◽  
Fab Mass Spectra

Metal complexes containing the ligand 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazatetradecane were synthesized and characterized using electron impact (EI) and fast atom bombardment (FAB). The FAB mass spectra were obtained in positive and negative ion mode. FAB in the positive ion mode proved to be the most successful technique for the identification of these compounds. The majority of the FAB spectra obtained were structurally informative, although not all showed molecular (M+) or quasimolecular ([M + H]+) ions. The fragmentations observed were characteristic of the ligands and the metal, and were interpreted based on the chemical and spectroscopic properties of these compounds. Keywords: FAB mass spectroscopy, tetraazacyclotetradecane complexes.

SPECTROSCOPIC PROPERTIES OF DYSPROSIUM VANADATE

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-1024-C1-1025 ◽  
Author(s):  
C. J. ELLIS ◽  
K. A. GEHRING ◽  
M. J. M. LEASK ◽  
R. L. WHITE
Keyword(s):  
Spectroscopic Properties
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