4,4′-Bis(trifluoromethyl)-2,2′-bipyridine – a multipurpose ligand scaffold for lanthanoid-based luminescence/19F NMR probes

Tuba Güden-Silber; Kathrin Klein; Michael Seitz

doi:10.1039/C3DT50842K

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Dalton Transactions

Issue 38, 2013

The international journal for inorganic, organometallic and bioinorganic chemistry

Impact Factor 3.806 48 Issues per Year Indexed in MEDLINE

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4,4′-Bis(trifluoromethyl)-2,2′-bipyridine – a multipurpose ligand scaffold for lanthanoid-based luminescence/¹⁹F NMR probes

Tuba Güden-Silber,^a Kathrin Klein^a and Michael Seitz*^a

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Inorganic Chemistry I, Department of Chemistry and Biochemistry, Ruhr-University Bochum, 44780 Bochum, Germany
E-mail: michael.seitz@rub.de;
Fax: +49 (0)234 32-14378

Dalton Trans., 2013,42, 13882-13888

DOI: 10.1039/C3DT50842K
Received 28 Mar 2013, Accepted 20 Jul 2013
First published online 07 Aug 2013

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Abstract
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The tetradentate ligand 4,4′-bis(trifluoromethyl)-2,2′-bipyridine-6,6′-dicarboxylic acid (H₂1) and three corresponding anionic rare earth complexes [RE(1)₂]⁻ (RE = Y, Tb, Dy) were synthesized. The terbium and dysprosium complexes show lanthanoid-centered luminescence in aqueous solution, as well as paramagnetically enhanced longitudinal magnetic relaxation of the ¹⁹F nuclei.