Coordination complex [Eu(μ2-OC2H5)(btfa)(NO3) (phen)]2·phen with high luminescent efficiency

Mihail S Iovu,Institute Of Applied Physics, Republic Of Moldova ,Institute Of Chemistry, Republic Of Moldova ,Nichita A Siminel,Anatol V Siminel,Ion P Culeac,Victor I Verlan,Polytechnic University Of Bucharest, Romania ,Vera E Zubareva,Marius Enachescu,Olga Bordian,Ion Bulhac

doi:10.53081/mjps.2021.20-1.06

Mihail S Iovu, Institute Of Applied Physics, Republic Of Moldova + Show 10 more

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https://doi.org/10.53081/mjps.2021.20-1.06

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Abstract

Experimental results on the bis[(μ2-etoxi)(benzoyl trifluoroacetonato)(nitrato)(1,10-phenantroline)europium(III)]1,10-phenantroline europium(III) coordination complex (hereafter, [Eu(μ2-OC2H5)(btfa)(NO3)(phen)]2·phen) are described. The complex is characterized by photoluminescence (PL) and infrared spectroscopy. Photoluminescence spectra of the complex exhibit strong emission with specific narrow emission bands associated with the 5D0→7Fj (j = 0–4) transitions. The pattern of emission band splitting and the luminescence time decay suggest the presence of at least two different sites of the Eu3+ ion in a low-symmetry environment. The absolute PL quantum yield of the complex is determined to be 49.2%.

Highlights

IntroductionRare-earth compounds, and their coordination complexes, attract a lot of interest because of their fundamental physical properties and numerous applications in different
Rare-earth compounds, and their coordination complexes, attract a lot of interest because of their fundamental physical properties and numerous applications in differentMoldavian Journal of the Physical Sciences, Vol 20, 1, 2021 fields in optoelectronics, biotechnology, biochemistry, medicine, and other industries [1,2,3]
Because of these specific properties of trivalent europium ion, it can be used as a luminescent probe to acquire information on the local symmetry in crystalline host matrices or glasses as well as complexes with organic ligands [8,9,10]

Summary

Introduction

Rare-earth compounds, and their coordination complexes, attract a lot of interest because of their fundamental physical properties and numerous applications in different. Europium ions are characterized by a simple structure of 2S+1LJ multiplets with nondegenerate first excited and ground levels, 5D0 and 7F0. Because of these specific properties of trivalent europium ion, it can be used as a luminescent probe to acquire information on the local symmetry in crystalline host matrices or glasses as well as complexes with organic ligands [8,9,10]. This work reports a further study of photoluminescence (PL) properties of europium(III) coordination complex [Eu(μ2-OC2H5)(btfa)(NO3)(phen)]2·phen

Preparation and Characterization of the Complex

Infrared Transmission Spectra

Photoluminescence Emission Spectra

Conclusions