Applicability of Reddish-Orange Light Emitting Samarium (III) Complexes for Biomedical and Multifunctional Optoelectronic Devices

Abstract

Six crimson samarium (III) complexes based on β-ketone carboxylic acid and ancillary ligands were synthesized by adopting grinding technique. All synthesized complexes were investigated via employing elemental analysis, infrared, UV-Vis, NMR, TG/DTG and photoluminescence studies. Optical properties of these photostimulated samarium (III) complexes exhibit reddish-orange luminescence due to 4 G 5/2 → 6 H 7/2 transition at 606 nm of samarium (III) ions.Further, energy band gap, color purity, CIE color coordinates, CCT and quantum yield of all complexes were determined accurately. Replacement of water molecules by ancillary ligands enriched the complexes (S2-S6) with decay time, quantum yield, luminescence, energy band gap and biological properties than parent complex (S1). Interestingly, these e cient properties of complexes may nd their applications in optoelectronic and lighting systems. In addition to these the antioxidant and antimicrobial assays were also investigated to explore the application in biological assays.

Photophysical, optical and lasing analysis of fluorinated β-keto carboxylate europium(III) complexes

“…The prominent frequencies of spectra are enlisted in table 2. The spectrum of CDFA displayed, two sharp bands at 3530 and 3470 cm −1 corresponding to ν(-OH carboxylic) and ν(-NH) respectively, but these bands are superseded by the broad and intense band in the range of 3150-3600 cm −1 in spectra of complexes, which corresponds to the overlapped band of -NH stretch of ligand with -OH stretch of aqua molecules present in complexes [18][19][20]. A sharp band at 1620 cm -1 in spectrum of ligand, is assigned to the ν(C=O) stretch of carbonyl group [21,22] but it is red shifted toward lower frequencies region between 1570-1575 cm −1 in spectra of complexes, which justified the involvement of the ketonic group in complexation [21].…”

Computational analysis, Urbach energy and Judd–Ofelt parameter of warm Sm3+complexes having applications in photovoltaic and display devices

“…32 Scheme 1 explicates the preparation route of Sm 3+ complexes C1-C6. 24,33 The owchart of the steps of synthesis of C1-C6 complexes by a liquid-assisted grinding method is presented in Fig. S1.…”

“…Stark splitting perceived in the emission spectra of the complexes in the solution phase indicates their non-cubic symmetry in the surrounding of Sm 3+ ions, which is further proved by the Judd-Ofelt intensity parameters and intensity ratio (I Sm ). 24,76 Stark splitting would be justied by the Gaussian tting, which deconvoluted the emission transition into four peaks, as shown in Fig. S11.…”

“…The impact of chelation of ligands on the optical characteristics of lanthanide(III) ions is known as the "antenna effect". [23][24][25] Ligands have a higher affinity to coordinate with lanthanide(III) ions via oxygen (O) and nitrogen (N) atom donor sites. Generally, b-diketone, keto carboxylic acid, aromatic carboxylic acid and chromones are in use to sensitize lanthanide(III) ions and also to increase their emission intensity.…”

Luminescence Properties of Samarium Ion‐Doped Silicoborate Glasses for Application in Optoelectronic Material

“…These glasses have been studied extensively. [2,[19][20][21] One of the RE ions that provides strong emission in the orange-red region is trivalent samarium (Sm 3þ ) ions where there is a hypersensitive transition from 4 G 5/2 to 6 H 5/2 . [22][23][24] Recently, many researchers have shown interest in understanding the luminescence properties of Sm 3þ ions in various glass hosts, such as V. Murali Krishna et al, who has studied Sm 3þ ion-doped oxy-fluoro borotellurite glasses, [25] M. Shoaib et al who studied samarium-doped oxide and oxyfluoride phosphate glasses, [26] and N. Wantana et al who studied Sm 3þ -doped tungsten gadolinium borate glass.…”