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Anion-dependent construction of two hexanuclear 3d-4f complexes with a flexible Schiff base ligand
Xiaoping Yang1, Christopher Chan, Daniel Lam
1Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station, A5300, Austin, 78712-0165, TX, USA.
This study reports two novel hexanuclear metal complexes containing nickel-europium and copper-europium ions. These complexes exhibit unique chain structures and were characterized for their luminescence properties.
Area of Science:
- Coordination Chemistry
- Materials Science
- Inorganic Chemistry
Background:
- Schiff-base ligands are versatile building blocks in coordination chemistry.
- Lanthanide-transition metal complexes offer intriguing magnetic and luminescent properties.
Purpose of the Study:
- To synthesize and characterize novel hexanuclear 3d-4f metal complexes.
- To investigate the structural and luminescent properties of Ni-Eu and Cu-Eu complexes.
Main Methods:
- Synthesis of Schiff-base ligand H(2)L (N,N'-bis(3-methoxysalicylidene)butane-1,4-diamine).
- Formation and isolation of hexanuclear complexes [Eu(4)Ni(2)L(2)(OAc)(12)(EtOH)(2)] and [Eu(4)Cu(2)L(2)(OAc)(12)]·2H(2)O.
- Single crystal X-ray crystallographic studies for structural determination.
- Luminescence spectroscopy of the ligand and metal complexes.
Main Results:
- Two hexanuclear complexes with a linear chain structure were successfully synthesized.
- The structures reveal four Eu(3+) cations bridged by acetate groups, capped by Ni/Cu-ligand units.
- Luminescence properties of the free ligand and the synthesized complexes were measured and analyzed.
Conclusions:
- The study successfully synthesized and structurally characterized two novel hexanuclear 3d-4f metal complexes.
- The findings contribute to the understanding of lanthanide-transition metal cluster structures and their potential luminescent applications.
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