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Orange Fluorescent Ru(III) Complexes Based on 4'-Aryl Substituted 2,2':6',2aEuro(3)-Terpyridine for OLEDs Application

Lakshmanan, Raja and Shivaprakash, N C and Sindhu, S (2018) Orange Fluorescent Ru(III) Complexes Based on 4'-Aryl Substituted 2,2':6',2aEuro(3)-Terpyridine for OLEDs Application. In: JOURNAL OF FLUORESCENCE, 28 (1). pp. 173-182.

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Official URL: http://dx.doi.org/ 10.1007/s10895-017-2180-5

Abstract

A series of ruthenium (III) complexes of the formulae Ru(4-Mephtpy)(2)]Cl-3(1) Ru(L (1) )], Ru(3,4,5-tmphtpy)(2)]Cl-3(2) Ru(L (2) )], and Ru(4-thptpy)(2)]Cl-3(3) Ru(L (3) )], (where L = terpy = 2.2':6'2aEuro(3) terpyridine ligands) are synthesized. The complexes were characterized by elemental analyses, spectroscopic and electrochemical data. The density functional theory (DFT) outlines the geometric optimisation and electronic charge transition of these complexes. Photophysical studies describe that the luminescence of Ru(III) complexes is due to electronic transition between the energy levels of singly unoccupied molecular orbitals (SUMO) and singly occupied molecular orbitals (SOMO). It also exhibits the potential charge transfer to pi-pi* and n-pi* states due to MLCT and ILCT processes of the complexes. The observed bands centered at 591 and 620 nm demonstrate that these emissions originated from the transition of SUMO to SOMO energy levels, that is, from the radiative decay from the doublet exciton. Due to the heavy metal effect of Ru(III) ions the photophysical behaviour depends on the MLCT process. In conclusion, that the all three Ru(L (1) -L (3) ) complexes are fallen orange emission.

Item Type: Journal Article
Additional Information: Copy right for this article belong to the SPRINGER/PLENUM PUBLISHERS, 233 SPRING ST, NEW YORK, NY 10013 USA
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Depositing User: Id for Latest eprints
Date Deposited: 02 Mar 2018 14:56
Last Modified: 02 Mar 2018 14:56
URI: http://eprints.iisc.ac.in/id/eprint/59053

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