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Optical Features of Efficient Europium(III) Complexes with β-Diketonato and Auxiliary Ligands and Mechanistic Investigation of Energy Transfer Process

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Abstract

Two new europium (III) complexes have been synthesized with 1,3­[bis(4­methoxyphenyl)]propane­1,3­dionato (HBMPD) as main ligand and 2,2′-bipyridyl (bipy) or 1,10-phenanthroline (phen) as an auxiliary ligand. The main ligand HBMPD has been synthesized by ecofriendly microwave approach and complexes by solution precipitation method. The resulting materials are characterized by IR, 1H-NMR, elemental analysis, X-ray diffraction, UV-visible and TG-DTG techniques. The photoluminescence (PL) spectroscopy depicts the detail analysis of photophysical properties of the complexes, their results show that the ligand interact with Eu (III) ion which act as antenna and transfers the absorbed energy to the central europium(III) ion via sensitization process efficiently. As a consequence of this interaction, these materials exhibit excellent luminescent intensity, long decay time (τ), high quantum efficiency (η) and Judd-Ofelt intensity parameter (Ω2). The CIE coordinates fall under the deep red region, matching well with the NTSC (National Television Standard Committee) standard. Hence, these highly efficient optical materials can be used as a red component in organic light emitting diodes (OLEDs) and full color flat panel displays.

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Acknowledgments

The present work is financial supported by Council of Science and Industrial Research (CSIR) of India in the form of senior research fellowship (09/382(0155)/2012- EMR-I).

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  1. Department of Chemistry, Maharshi Dayanand University, Rohtak, Haryana, 124001, India

    Manju Bala, Satish Kumar, V. B. Taxak, Priti Boora & S. P. Khatkar

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  1. Manju Bala
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Bala, M., Kumar, S., Taxak, V.B. et al. Optical Features of Efficient Europium(III) Complexes with β-Diketonato and Auxiliary Ligands and Mechanistic Investigation of Energy Transfer Process. J Fluoresc 26, 1813–1823 (2016). https://doi.org/10.1007/s10895-016-1873-5

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