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Tris(tropolonato)phenanthroline Lanthanide( III ) Complexes as Photochemical Devices
Author(s) -
Bertolo Laura,
Tamburini Sergio,
Vigato Pietro Alessandro,
Porzio William,
Macchi Giorgio,
Meinardi Francesco
Publication year - 2006
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.200501061
Subject(s) - chemistry , lanthanide , ligand (biochemistry) , tris , chelation , phenanthroline , nuclear magnetic resonance spectroscopy , stereochemistry , photochemistry , crystallography , inorganic chemistry , organic chemistry , ion , biochemistry , receptor
The tris‐tropolonato erbium( III ) complexes [Er(hino) 3 (phen)] and [{Er(hino) 3 } 2 (pdon)] (H‐hino = 2‐hydroxy‐6‐isopropylcyclohepta‐2,4,6‐trien‐1‐one; phen = 1,10‐phenanthroline; pdon = 1,10‐phenanthroline‐5,6‐dione) have been prepared by reaction of [Er(hino) 3 ] n with the appropriate chelating ligand in alcoholic solution. The complexes were characterized by elemental analyses, TG, ESI MS, 1 H NMR, and IR spectroscopy, also by comparison with the properties of the analogous Eu III and Yb III complexes. The ESI‐MS spectroscopy of the complex with the ditopic ligand pdon parallels the other physico‐chemical data (IR, NMR), confirming the occurrence of a dinuclear entity. All the investigated Er III complexes show efficient NIR emissions at about 1550 nm upon excitation at 355 nm in the UV ligand absorption band, emerging as possible candidate as active material for the realization of plastic amplifiers for telecommunications. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)