Premium
Lanthanopolyoxometalates as Building Blocks for Multiwavelength Photoluminescent Organic–Inorganic Hybrid Materials
Author(s) -
Granadeiro Carlos M.,
Ferreira Rute A. S.,
SoaresSantos Paula C. R.,
Carlos Luís D.,
Nogueira Helena I. S.
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200900615
Subject(s) - chemistry , photoluminescence , polyoxometalate , lanthanide , ligand (biochemistry) , moiety , hybrid material , raman spectroscopy , quantum yield , luminescence , fourier transform infrared spectroscopy , inorganic chemistry , nuclear chemistry , stereochemistry , catalysis , organic chemistry , ion , chemical engineering , fluorescence , materials science , biochemistry , receptor , physics , optoelectronics , quantum mechanics , optics , engineering
Organic–inorganic hybrid materials were prepared by combining lanthanide(III) substituted Wells–Dawson anions as inorganic building blocks and 3‐hydroxypicolinate (picOH) as the organic ligand. The organic–inorganic hybrids obtained K n [Ln x (α 2 ‐P 2 M 17 O 61 )(picOH) 7 ] · y H 2 O (M VI = W and Ln III = La, Ce, Sm, Eu, Tb, Er; or M VI = Mo and Ln III = Eu) were characterized by chemical analysis and spectroscopic methods such as FTIR and FT‐Raman, 31 P and 13 C MAS NMR spectroscopy. Photoluminescence measurements on the prepared hybrid materials were performed showing the intra‐4f N emission in the visible (Eu III , Tb III compounds) and in the near‐infrared (Er III compound) spectral regions, being, in all the cases, sensitized by both the picOH ligand and the polyoxometalate moiety. A maximum quantum yield value of 0.18 was found for K 11 [Eu 2 (α 2 ‐P 2 Mo 17 O 61 )(picOH) 7 ] · 10H 2 O.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)