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Near-infrared photoluminescence of lanthanide complexes containing the hemicyanine chromophore
- Source :
-
Polyhedron . Nov2007, Vol. 26 Issue 18, p5441-5447. 7p. - Publication Year :
- 2007
-
Abstract
- Abstract: The near-infrared luminescence properties of three (E)-N-hexadecyl-N′,N′-dimethylamino-stilbazolium tetrakis(1-phenyl-3-methyl-4-benzoyl-5-pyrazolonato) lanthanide(III) complexes are described. These three complexes, containing trivalent neodymium, erbium and ytterbium, respectively, show near-infrared luminescence in acetonitrile solution upon UV irradiation. Luminescence decay times have been measured. The complexes consist of a positively charged hemicyanine chromophore with a long alkyl chain and a tetrakis(pyrazolonato) lanthanide(III) anion. Because of the absence of an α-hydrogen atom in the pyrazolonato ligands, and because of the saturation of the coordination sphere by four bidentate ligands, the luminescence properties are enhanced when compared to, e.g. quinolinate complexes. [Copyright &y& Elsevier]
- Subjects :
- *PHOTOLUMINESCENCE
*LUMINESCENCE
*RADIATION
*RARE earth metals
Subjects
Details
- Language :
- English
- ISSN :
- 02775387
- Volume :
- 26
- Issue :
- 18
- Database :
- Academic Search Index
- Journal :
- Polyhedron
- Publication Type :
- Academic Journal
- Accession number :
- 27366445
- Full Text :
- https://doi.org/10.1016/j.poly.2007.08.005