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Abstract
A new samarium(iii) complex, [Sm(hfaa)3(Py-Im)], has been prepared and fabricated into thin films which show color tunability from violet to orange depending on the concentration of doping within the film.
Highlights
An efficient Sm(III) complex would display a deep red emission[6] because of the presence of the electric-dipole 4G5/2 - 6H9/2 transition at 648 nm and is beneficial for constructing the red element in a full-color display
A PU composite thin film of the [Sm(hfaa)3(Py-Im)] complex was fabricated by dissolving PU (4% w/v) in tetrahydrofuran (THF) (25 mL) The suspension was left with stirring at room temperature until a clear solution was observed
The new mixed-ligand complex [Sm(hfaa)3(Py-Im)] was synthesized using a one-pot method (Scheme 1) reported previously for the synthesis of analogous lanthanide complexes.1a The complex was characterized by elemental analysis, FT-IR spectroscopy and mass spectrometry
Summary
An efficient Sm(III) complex would display a deep red emission[6] because of the presence of the electric-dipole 4G5/2 - 6H9/2 transition at 648 nm and is beneficial for constructing the red element in a full-color display. The complex displays color tunability from orange to violet with an obvious change in the luminescence lifetime, hinting towards white light generation. Considering these interesting photophysical properties and the possibility of generating white light emission at a single component level, the complex was further embedded into a PU polymer matrix with different doping concentrations to develop color-tunable flexible hybrid thin films with a view to developing high-performance luminescent materials for optoelectronic application
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