Issue 36, 2012

Unusual nitro-coordination of europium(iii) and terbium(iii) with pyridinyl ligands

Abstract

A new ligand family based on picoline, bipyridine and terpyridine containing a nitro moiety has been synthesized and its coordination and sensitization ability for lanthanide ions has been studied. Three new complexes were characterized by X-ray single crystal diffraction and all three show uncommon coordination of the nitro moiety to the lanthanide ion. 5cTb, a terpyridine-nitro derivative with Tb(NO3)3, crystallizes in the orthorhombic space group Pbca with a = 15.125(3), b = 13.776(3), c = 18.716(4) Å, and V = 3899.8(13) Å3 and is isostructural with its Eu(III) analog (5cEu) with cell parameters a = 15.1341(4), b = 13.7070(4), c = 18.8277(5) Å. 6Eu, a tripodal amine with a nitro-derivatized pyridine with Eu(CF3SO3)3, crystallizes in the triclinic space group P[1 with combining macron] with a = 11.067(2), b = 11.633(2), c = 12.772(3) Å, α = 110.94(3), β = 97.49(3), γ = 91.42(3)° and V = 1518.1(5) Å3. Finally, ligand 5a, a bipyridine-nitro derivative, crystallizes in the orthorhombic space group P21/n with a = 3.7128(3), b = 11.7806(8), c = 19.9856(14) Å, β = 92.925(2)° and V = 873.01(11) Å3. All four ligands show sensitization of Eu(III) and Tb(III) luminescence.

Graphical abstract: Unusual nitro-coordination of europium(iii) and terbium(iii) with pyridinyl ligands

Supplementary files

Article information

Article type
Paper
Submitted
18 Jun 2012
Accepted
25 Jul 2012
First published
09 Aug 2012

Dalton Trans., 2012,41, 11212-11218

Unusual nitro-coordination of europium(III) and terbium(III) with pyridinyl ligands

A. de Bettencourt-Dias, S. Bauer, S. Viswanathan, B. C. Maull and A. M. Ako, Dalton Trans., 2012, 41, 11212 DOI: 10.1039/C2DT31308A

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