New types of lanthanide complexes

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6012836

Kahwa, I A.K.

Three new types of lanthanide (Ln) complexes, namely, the first examples of homodinuclear macrocyclic lanthanide complexes, novel binary and ternary gaseous polyatomic lanthanide oxides and new lanthanide oxalato complexes are described in chapters one, two and three respectively. The homodinuclear complexes are 2:2 condensation products of 2,6-diformyl-p-cresol and triethylenetetramine templated by Ln(NO/sub 3/)/sub 3/ and Ln(ClO/sub 4/)/sub 3/. The complexes are dimorphic, and are off-white (the more stable form) when they are obtained from dilute solutions and orange if they arise from more concentrated reactants. The complexes were characterized by elemental analysis, fast atom bombardment mass spectrometry (FAB MS), electronic absorption and IR spectroscopy, thermogravimetry along with preliminary spectroscopic studies using electron paramagnetic resonance, magnetic susceptibility and luminescence. The orange complexes exhibit more antiferromagnetic exchange interactions, low Ln/sup 3 +/magnetic moments and multi-exponential luminescence decay kinetics, whereas the off-white complexes show single exponential luminescence decay and free ion magnetic moments. At low temperatures and in presence of excess triethylenetetramine, solvated light lanthanide mononuclear complexes of a 1:1 acyclic Schiff base acetal were isolated and the structure of one of these was confirmed by single crystal x-ray diffraction crystallography.

• Research Organization: Louisiana State Univ., Baton Rouge (USA)
• OSTI ID: 6012836
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
ALKALI METAL COMPLEXES
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL PREPARATION
CHEMICAL PROPERTIES
COHERENT SCATTERING
COLOR
COMPLEXES
CRYSTAL STRUCTURE
DIFFRACTION
ELECTRON SPIN RESONANCE
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
GALLIUM COMPOUNDS
GALLIUM OXIDES
GRAVIMETRIC ANALYSIS
HOLMIUM COMPOUNDS
HOLMIUM OXIDES
INFRARED SPECTRA
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LUMINESCENCE
MAGNETIC PROPERTIES
MAGNETIC RESONANCE
MASS SPECTROSCOPY
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POTASSIUM COMPLEXES
QUANTITATIVE CHEMICAL ANALYSIS
RARE EARTH COMPLEXES
RARE EARTH COMPOUNDS
RESONANCE
SCATTERING
SPECTRA
SPECTROSCOPY
SYNTHESIS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THULIUM COMPOUNDS
THULIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YTTERBIUM COMPOUNDS
YTTERBIUM OXIDES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES