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Synthesis 1996; 1996(11): 1313-1319
DOI: 10.1055/s-1996-4384
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Synthesis and Characterization of Nitroxide-Linked Ruthenium Complexes as Molecular Probes for Microheterogeneous Environments

Stefan H. Bossmann* , Naresh D. Ghatlia, M. Francesca Ottaviani, Claudia Turro, Heinz Dürr, Nicholas J. Turro
  • *Lehrstuhl für Umweltmeßtechnik am Engler-Bunte Institut der Universität Karlsruhe, D-76128 Karlsruhe, Germany; Columbia University in the City of New York, New York, NY 10027, USA
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Publication Date:
31 December 2000 (online)

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Several new TEMPO (2,2,6,6-tetramethylpiperidine N-oxide)-labeled ruthenium complexes were prepared. They can be discerned in two different classes featuring rigid and flexible linkers between the ruthenium(II)-polypyridyl complex and the stable nitroxide. The bis(heteroleptic) ruthenium complexes were synthesized from [Ru(L2)]Cl2 (L = 2,2’-bipyridine or 1,10-phenanthroline) and newly prepared phenanthroline-TEMPO-ligands. Finally, a tris(heteroleptic), spin-labeled ruthenium complex has been prepared from [Ru(DMSO)4]Cl2, dipyrido[3,2-a:2’,3’-c]phenazine (dppz), 1,10-phenanthroline and a phenanthroline-TEMPO-ligand with a rigid linker.

ruthenium(II)-phenantroline complexes - bis(heteroleptic) ruthenium complexes - tris(heteroleptic)ruthenium complexes - stable nitroxides - TEMPO - synthesis of CW-ESR-probes