Abstract
Complexes with composition Ln(pic) 3·3(aza) (Ln = Nd, Eu; pic = picrate; aza = 2-azacyclononanone) were characterized by IR absorption spectroscopy and elemental analysis. Visible absorption spectra for the Nd compound and emission spectra for the Eu compound were also recorded. X-ray single crystal diffraction analysis of the Eu compound shows that the picrates are bidentate, bonded through the phenolic and one o-nitrogroup oxygens and the 2-azacyclononanones are bonded through the carbonyl oxygens, forming a tricapped trigonal prism with D 3h symmetry distorted towards C 3v around the EU 3+ ion, which is in agreement with the emission spectra evidence.
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