title: New complexes of La(III), Ce(III), Pr(III), Nd(III), Sm(III), Eu(III) and Gd(III) ions with morin.
abstract: New solid complex compounds of La(III), Ce(III), Pr(III), Nd(III), Sm(III), Eu(III) and Gd(III) ions with morin were synthesized. The molecular formula of the complexes is Ln(C(15)H(9)O(7))(3).nH(2)O, where Ln is the cation of lanthanide and n=6 for La(III), Sm(III), Gd(III) or n=8 for Ce(III), Pr(III), Nd(III) and Eu(III). Thermogravimetric studies and the values of dehydration enthalpy indicate that water occurring in the compounds is not present in the inner coordination sphere of the complex. The structure of the complexes was determined on the basis of UV-visible, IR, MS, (1)H NMR and (13)C NMR analyses. It was found that in binding the lanthanide ions the following groups of morin take part: 3OH and 4CO in the case of complexes of La, Pr, Nd, Sm and Eu, or 5OH and 4CO in the case of complexes of Ce and Gd. The complexes are five- and six-membered chelate compounds.
authors: University of Technology, Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, 35-959 Rzeszów, Poland. elawoz@prz.rzeszow.pl
authors: Elzbieta
authors: E
authors: Woźnicka
authors: Maria
authors: M
authors: Kopacz
authors: Michał
authors: M
authors: Umbreit
authors: Jolanta
authors: J
authors: Kłos
mesh_terms: D005419:Flavonoids / Q000138:chemical synthesis* / Q000737:chemistry; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D018629:Spectrometry, Mass, Secondary Ion; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013816:Thermodynamics; D013818:Thermogravimetry; D047309:Flavones
chemical_list: D005419:Flavonoids; D028581:Lanthanoid Series Elements; D009942:Organometallic Compounds; C008548:morin; D047309:Flavones