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Highly emissive host-guest based on nanoclay intercalated with an Eu3+ complex bearing a new Ru2+ organometallic ligand.

Abstract

This work describes the design, synthesis and physicochemical properties of the highly emissive nanocomposite [Bentonite][Eu{(η5-Cp*)Ru(η6-bzac)}3Phen]0.1 based on the Eu(III) complex [Eu{(η5-Cp*)Ru(η6-bzac)}3Phen][PF6]3, bearing a new RuII organo-metallic β-diketone ligand [(η5-Cp*)Ru(η6-Hbzac)][PF6], intercalated into the bentonite-Na+ nanoclay. Single crystal X-ray diffraction analysis of the ligand showed that the [(η5-Cp*)Ru]+ is bound to the phenyl group of a highly planar and conjugated organic β-diketone 1-phenyl-1,3-butanedione (Hbzac) through a η6-coordination. The complex was inserted into bentonite-Na+ by ion exchange reactions at room temperature. The products display interlaminar distances and stoichiometries in agreement with the ion exchange capacity and the interlayer space available in the clay. Thermal Gravimetric Analysis were used to establish the decomposition temperatures of the complex and the nanocomposite that exceed or border 280°C. Both compounds exhibit luminescence of high colorimetric purity in the red. The intensity of the characteristic narrow emission band of Eu3+ in the red, corresponding to 5D07F2 transition, is accentuated in the intercalated nanocomposite, reaching a symmetry parameter I(5D07F2)/I(5D07F1) and Judd–Ofelt Ω2 parameter approximately three and two times larger respectively than the starting complex. The Ruthenium(II)-Europium(III) based nanocomposite is presented as a potential luminescent material with considerably high stability in time.

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Publication details

The article was received on 16 May 2018, accepted on 06 Aug 2018 and first published on 07 Aug 2018


Article type: Paper
DOI: 10.1039/C8NJ02432D
Citation: New J. Chem., 2018, Accepted Manuscript
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    Highly emissive host-guest based on nanoclay intercalated with an Eu3+ complex bearing a new Ru2+ organometallic ligand.

    S. E. Celedón, A. de Camargo, M. Fuentealba, V. Artigas, E. J. Benavente and G. Gonzalez, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ02432D

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