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SM ISO690:2012 STANILA, Andreea, STANILA, Sorin. Spectroscopic studies of aminoacids complexes with biometals
. In: Chemistry Journal of Moldova, 2012, nr. 1(7), pp. 140-144. ISSN 1857-1727. |
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Chemistry Journal of Moldova | |||||
Numărul 1(7) / 2012 / ISSN 1857-1727 /ISSNe 2345-1688 | |||||
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Pag. 140-144 | |||||
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The [Cu(L)2]·H2O, [Co(L)2]·2H2O, [Zn(L)2]·H2O complexes with methionine (L) as ligand, were synthesized
in water solution and analyzed by means of: elemental analysis, atomic absorption spectroscopy, thermogravimetry,
FT-IR, UV-VIS and EPR spectroscopies.
The atomic absorption spectroscopy and elemental measurements confirm the ratio 1:2 metal ion: methionine
composition for the synthesised compounds.The IR spectra show that amino acids act as bidentate ligands with
coordination involving the carboxylic oxygen and the nitrogen atom of the amino group. Spectral UV-VIS data
confirmed the covalent metal-ligand bonds, the pseudotetrahedral symmetry around the copper and zinc ions and
the octahedral environment for the cobalt ion. Powder ESR spectra at room temperature are typically for monomeric
species.
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Cuvinte-cheie biometals complexes, spectroscopies, methionine, DSC |
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