Abstract
This paper reports the synthesis, structures, and photophysical and electroluminescence properties of low symmetry NIR emitting octa- and nona-coordinate Nd tris β-diketonate complexes.
Highlights
Near infra-red (NIR) emitting materials are attracting considerable attention due to their various potential applications in biomedical assay and imaging,1 optical fibers, telecommunication and laser systems,2 and organic light emitting diodes (OLEDs).3,4 The Nd(III) ion, in particular, with its strong emission at 1.064 mm, has become an ideal candidate for laser transitions.5 On the other hand, its application in the fabrication of NIR-OLEDs is still scarce.PUC-Rio, Rio de Janeiro, RJ 22453-970, Brazil e Instituto de Ciencias Extas e da Terra, Centro Universitario do Araguaia, Universidade Federal do Mato Grosso, 78600-000, Barra do Garças, MT, Brazil † Electronic supplementary information (ESI) available
This paper reports the synthesis, structures, photophysics and optoelectronics of three NIR-emitting ternary neodymium tris b-diketonate complexes, [Nd(hfpd)3(L)n=1–2(H2O)x=0–2](H2O)y=0–1 (hfpd = anionic form of 1,1,1,5,5,5-hexafluoropentane-2,4-dione; L = diphenyl sulfoxide, n = 1, x = 2, y = 1 [1]; L = dibenzyl sulfoxide, n = 1, x = 1, y = 0 [2]; L = triphenyl phosphine oxide, n = 2, x = 0, y = 0 [3])
These results have made such complexes strong candidates as active materials for electroluminescent devices, luminescent resins and liquid crystals.14. These complexes usually crystallize as hydrated Ln tris b-diketonates when Ln ions and b-diketone are taken in the ratio of 1 : 3. The water molecules in the inner coordination sphere could be replaced by the addition of N- or O-donor ancillary ligands that deactivate the non-radiative quenching processes, and make the resulting ternary lanthanide complexes relatively more luminescent
Summary
Near infra-red (NIR) emitting materials are attracting considerable attention due to their various potential applications in biomedical assay and imaging, optical fibers, telecommunication and laser systems, and organic light emitting diodes (OLEDs). The Nd(III) ion, in particular, with its strong emission at 1.064 mm, has become an ideal candidate for laser transitions. On the other hand, its application in the fabrication of NIR-OLEDs is still scarce.PUC-Rio, Rio de Janeiro, RJ 22453-970, Brazil e Instituto de Ciencias Extas e da Terra, Centro Universitario do Araguaia, Universidade Federal do Mato Grosso, 78600-000, Barra do Garças, MT, Brazil † Electronic supplementary information (ESI) available. Near infra-red (NIR) emitting materials are attracting considerable attention due to their various potential applications in biomedical assay and imaging, optical fibers, telecommunication and laser systems, and organic light emitting diodes (OLEDs).. These results have made such complexes strong candidates as active materials for electroluminescent devices, luminescent resins and liquid crystals.. These results have made such complexes strong candidates as active materials for electroluminescent devices, luminescent resins and liquid crystals.14 These complexes usually crystallize as hydrated Ln tris b-diketonates when Ln ions and b-diketone are taken in the ratio of 1 : 3. These results have made such complexes strong candidates as active materials for electroluminescent devices, luminescent resins and liquid crystals. These complexes usually crystallize as hydrated Ln tris b-diketonates when Ln ions and b-diketone are taken in the ratio of 1 : 3. The water molecules in the inner coordination sphere could be replaced by the addition of N- or O-donor ancillary ligands that deactivate the non-radiative quenching processes, and make the resulting ternary lanthanide complexes relatively more luminescent.
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