Description
Three new lanthanide(III) complexes (Ln = Sm, Tb and Eu)
of picolinic and glutaric acid were prepared and characterised.
The crystal structure of the complex [Sm(glu)(pic)-
(H2O)2] (where Hpic and H2glu stand for picolinic and glutaric
acid, respectively) was determined by single-crystal Xray
diffraction. All the Ln complexes were characterised by
elemental analysis, infrared spectroscopy, X-ray powder diffraction
and thermoanalytical measurements. The combined
Introduction
The design of functional units from the molecular scale
to macroscopic assemblies has emerged as a new paradigm
in materials synthesis resulting in an interplay between conventional
molecular chemistry and conventional solid-state
science. This has been particularly clear in the development
of functional materials using coordination compounds such
as in the field of semiconductors technology, supramolecular
machinery, microporous and hybrid materials and catalysis.[
1] In some cases, the development of these functional
materials is based on the chemistry of well-known coordination
compounds as illustrated by the assembly of inorganic-
organic extended lattices[2] and in the thermolysis of
metal thiolato compounds to produce thin films or nanoparticles.[
3]
Metals coordinated to aromatic ambidentate ligands
form a class of compounds with a wide variety of coordination
modes which has long attracted the attention of chemists.[
4] Griffith and co-workers extended this type of chemistry
to the second row transition metals and, in particular,
[a] Department of Chemistry, University of Aveiro, CICECO,
3810-193 Aveiro, Portugal
Fax: +351-234-370-084
E-mail: ttrindade@dq.ua.pt
[b] Department of Physics, University of Aveiro, CICECO,
3810-193 Aveiro, Portugal
[c] Department of Chemistry, University of Cambridge,
Lensfield Road, CB2 1EW Cambridge, United Kingdom
Supporting information for this article is available on the
WWW under http://www.eurjic.org or from the author.
© 2007 Wiley-VCH Verlag 4238 GmbH & Co. KGaA, Weinheim Eur. J. Inorg. Chem. 2007, 4238–4246
data show that these Ln complexes are isostructural. The effect
of both organic ligands on the photoluminescent behaviour
of the Sm3+, Eu3+ and Tb3+ complexes is discussed and
we anticipate the possibility of controlling the photoluminescence
of picolinic-containing lanthanide compounds by systematically
varying the length of the bridging ligand. FCT - POCI/QUI/58377/2004 Grant - SFRH/BD/17968/2004 Grant - SFRH/BPD/14954/ 2004
; Paz, Filipe A. Almeida 
