Search results

Sort By:

Limit search:

Optical Properties of Europium Compounds with L- and DL-α-Alanine-Hydroxamic Acids

100%

Legendziewicz J., Gawryszewska P., Gałdecka E., Gałdecki Z.

Acta Physica Polonica A

1996

vol. 90

issue 2

439-446

Two of europium complexes with L- and DL-α-alanine-hydroxamic acids were synthesized. To our knowledge they are the first examples of X-ray and spectral data of lanthanide single crystals with hydroxamic acid derivatives. Both compounds consist of dimers in their structures, formed by two OH bridging groups of amino-hydroxamic acid molecules. Besides, two metal ions are chelated by CO and OH groups, forming five-membered rings. In the complex with L-ligand, different than in the DL-one, two additional perchloric acid molecules are included in crystal cavities and form hydrogen bondings with nitrogen and oxygen atoms of the ligand. Absorption, emission and excitation spectra were measured and analyzed at room and low temperatures. Structural effect of ligand chirality was found and its spectroscopic consequences are reported. The effect of the dimeric structure on spectroscopic properties is discussed.

Preparation and Spectroscopy of Lanthanide Single Crystals with Isoleucine

100%

Legendziewicz J., Ciunik Z., Gawryszewska P., Sokolnicki J.

Acta Physica Polonica A

1993

vol. 84

issue 5

917-923

Single crystals of lanthanide complexes (Ln = Pr, Nd, Eu) were obtained from aqueous solutions. Optical properties of the title compound are investigated by absorption, excitation, and emission spectra. Probabilities of electronic transitions were analysed and participation of vibronic components in the spectra were found. Temperature effect on the spectra was studied and analysed in terms of cooperative interaction.

Refine search results

2 Acta Physica Polonica A

1 1996

1 1993

2 Gawryszewska P.

2 Legendziewicz J.

1 Ciunik Z.

1 Gałdecka E.

1 Gałdecki Z.

1 Sokolnicki J.

Search results

Optical Properties of Europium Compounds with L- and DL-α-Alanine-Hydroxamic Acids

Preparation and Spectroscopy of Lanthanide Single Crystals with Isoleucine