An Electron Paramagnetic Resonance Study of Copper(II) Complexes with L-alpha-Amino Acids (CROSBI ID 491299)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Mirosavljević, Krunoslav
engleski
An Electron Paramagnetic Resonance Study of Copper(II) Complexes with L-alpha-Amino Acids
In order to investigate importance of a conformation of the amino acid side chains in water binding or water release to the copper(II) ion in complexes with long aliphatic side chains the temperature dependece of Brownian motion of aquabis[N, N-dimetyl-L-alpha-alaninato] copper(II) and aquabis[N, N-dimetyl-L-alpha-isoleucinato]copper(II) was studied by EPR spectroscopy. The reorientation correlation time, t, describing Browniain motion of the studied complexes dissolved in different solvents was calculated from the analysis of the EPR spectra. Linear temperature dependece of t on viscosity to temperature ratio, obtained for the alaninato complex suggested one conformation of the aquacomplex in the examined temperature interval. More complex temperature dependence obtained for the isoleucinato complex, suggests a conformation change of the amino acid side chains above 300 K concomitant with the release of the apical water molecule from the copper(II) ion coordination sphere.
amino acids; copper(II) complexes; Brownian motion; EPR
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Podaci o prilogu
71-x.
2002.
objavljeno
Podaci o matičnoj publikaciji
Wharton, Eric
Heidelberg: SET for EUROPE i GDCh-Jungchemikerforum Heidelberg
Podaci o skupu
The 2002 Younger European Chemists' Conference
poster
30.09.2002-02.10.2002
Heidelberg, Njemačka