New complexes of La(III), Ce(III), Pr(III), Nd(III), Sm(III), Eu(III) and Gd(III) ions with morin.
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.
Woźnicka
Elzbieta
E
University of Technology, Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, 35-959 Rzeszów, Poland. elawoz@prz.rzeszow.pl
Kopacz
Maria
M
Umbreit
Michał
M
Kłos
Jolanta
J
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
D005419:Flavonoids; D028581:Lanthanoid Series Elements; D009942:Organometallic Compounds; C008548:morin; D047309:Flavones