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Novel multifunctional N,O,S - donor ligands for d - and f -element complexation

Novel multifunctional N,O,S - donor ligands for d - and f -element complexation. 22.02.2012 Juliane März. 1 Introduction. TU Dresden Department of Chemistry and Food Chemistry. 1 Introduction. „Basic research in energy 2020+ and in nuclear safety and disposal “.

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Novel multifunctional N,O,S - donor ligands for d - and f -element complexation

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  1. Novel multifunctional N,O,S - donor ligands for d- and f-element complexation 22.02.2012 Juliane März

  2. 1 Introduction TU Dresden Department of Chemistry and Food Chemistry

  3. 1 Introduction „Basic research in energy 2020+ and in nuclearsafetyanddisposal“ Joint research project: „Novel multifunctional N,O,S - donor ligands for d- and f-element complexation“ University of Leipzig HZDR TU Dresden 02NUK014A Coordination Chemistry of d- and f-block elements

  4. 1 Introduction Porphyrines β-Diketones/ Hydrazones Members of our group and their fields of research Schiffbases Schiff bases Amides

  5. 1 Introduction Ligand systems β-Diketones Schiffbases Amines Diamides Hydrazones • Synthesis and characterisation • Characteristics of complexation • Spectroscopy: ESI-MS, NMR, IR, UV/Vis, Fluorescence • X-ray analysis • Potentiometry • Liquid-liquid extraction

  6. 2 Results β-Diketones CoordinationofEu(III): [Eu(L)3(H2O)2]·THF • Complex Synthesis: • THF • Deprotonationagent Na2CO3 O2donorset CN = 8

  7. 2 Results Hydazones CoordinationofUO22+: (Et3NH)2[(UO2)2(μ-O2)(L)2]MeOH • Complex Synthesis: • MeOH • Deprotonationagent Et3N N2O2donorset CN = 8

  8. 2 Results Schiff Bases CoordinationofUO22+: [UO2(L)] Microwavesynthesis ofthecomplex N9 U1 O10 O16 N2O3donorset CN = 7

  9. 2 Results Amides N,N‘,N‘‘-Tris(2-picolyl)methane tricarboxamide Left-handed triple N‒H…O hydrogen bond helix X-ray analysis

  10. 2 Results UV/Vis Spectroscopy: Fe(III) Fe(NO3)3·6H2O, ctotal = 2.5·10-4 M in MeOH Job Plot at 660 nm: 2:1 ratio (L:Fe3+)

  11. 2 Results UV/Vis Spectroscopy : La(III) La(NO3)3·6H2O Preparation of the samples: 10-2 M in THF 1 h heating ctotal = 4·10-3 M in MeOH

  12. 2 Results Luminescence of Ln(III)- complexes in THF, H2O and EtOH/H2O Syntheses: ctotal = 10-2 M, in THF Microwave: 90 min (max. 200W) 30 min cooling Gd(III)-complex of L1 Excitation at 366 nm MW +H2O

  13. 2 Results Absorbance and Fluorescence Spectroscopy

  14. 2 Results Fluorescence Spectroscopy Cooperation with HZDR • Further analysis: • Dependence on pH • Other ligandsystems • Other metalcomplexes

  15. 3 Outlook Further projects

  16. Thank you for your attention.

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