Preparation, characterization and luminescence behavior of some samarium complexes

Chauhan, Archana; Langyan, Ritu

doi:10.1007/s12598-020-01552-9

Cited by 27 publications

(11 citation statements)

References 52 publications

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“…The small energy gap in Sm 3+ ion favored nonradiative relaxation processes that lowered the emission efficiency and luminescence lifetimes. However, samarium(III) coordination compounds are very interesting due to their capability of emission over a wide range within the electromagnetic spectrum, thus covering both the visible and NIR regions [70][71][72][73][74]. The results obtained here were similar to those for other previously published samarium(III)-β-diketonate systems [2,63,65,70]…”

Section: Photoluminescent Propertiessupporting

confidence: 86%

Magnetic and Luminescence Properties of 8-Coordinated Pyridyl Adducts of Samarium(III) Complexes Containing 4,4,4-Trifluoro-1-(naphthalen-2-yl)-1,3-butanedionate

et al. 2022

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A novel series of polypyridyl adducts, [Sm(ntfa)3(NN)] (2-4), with ntfa = 4,4,4-trifluoro-1-(naphthalen-2-yl)-1,3-butanedionate, NN = 2,2′-bipyridine (bipy), 4,4′-dimethyl-2,2′-bipyridine (4,4′-Me2bipy), and 5,5′-dimethyl-2,2′-bipyridine (5,5′-Me2bipy) were synthesized from the precursor complex [Sm(ntfa)3(MeOH)2] (1) and the corresponding pyridyl ligands. Single X-ray crystallography showed that the complexes displayed 8-coordinated geometry. The solid pyridyl adducts 2-4 exhibited emission of luminescence in the NIR and visible regions with close quantum yields (QY = 0.20–0.25%). The magnetic data of 1–4 showed larger values than those expected for magnetically noncoupled Sm(III) complexes in the 6H5/2 ground state, with no saturation on the applied high magnetic field static at a temperature of 2 K.

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Section: Photoluminescent Propertiessupporting

confidence: 86%

Magnetic and Luminescence Properties of 8-Coordinated Pyridyl Adducts of Samarium(III) Complexes Containing 4,4,4-Trifluoro-1-(naphthalen-2-yl)-1,3-butanedionate

et al. 2022

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“…Additionally, the relative quantum yield of complexes can be ascertained relative to YAG: Ce 3+ phosphor as a standard (ϕ = 0.55) using the following equation [44,45]:…”

Section: Decay Time and Quantum Yieldmentioning

confidence: 99%

Augmentation of photophysical features and Judd–Ofelt analysis of extensively green glowing terbium (III) complexes with nitrogen donor ancillary ligands

Hooda

Taxak

Malik

et al. 2022

Photochem Photobiol Sci

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Six green glowing terbium (III) complexes were fabricated via grinding method utilizing a prime organic ligand (L) and nitrogen donor ancillary ligands. Characterization of synthesized complexes was accomplished through various spectroscopic techniques. The significant thermal stability was determined by thermogravimetric analysis while the energy bandgap and Urbach energy were investigated through diffused reflectance spectra of these complexes. The peak observed at 548 nm in emission spectra is responsible for the virescent color of these complexes. Color purity, decay time, quantum yield, and emission intensities of ternary complexes were significantly improved as compared to binary ones due to the synergistic effect of ancillary ligands. Judd-Ofelt parameters were determined by the NIR absorption spectrum, which claims the asymmetric environment around the terbium (III) ion. CCT values advocate the applicability of these complexes in green light-emitting materials as a cool light source. The biological assignments reveal the significance of these complexes as potent antioxidants and antimicrobial agents. The energy transfer process highlights the enhancement of luminescence in these complexes via the synergic effect of ligands. Our investigation portrays that these complexes can be employed in laser technology, display devices, semiconductors, biological fields, and optoelectronic devices.

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“…Here the samarium complexes produced peaks at 598 nm and 644 nm, which represented the emissions from 4 G 5/2 to 6 H 7/2 and to 6 H 9/2 of interstitial Sm 3+ ions present in the complex; this finding was in agreement with many recent reports. [24,34,[36][37][38][39][40] PL analyses, therefore, clearly confirmed the successful incorporation of the complex into the pure and structurally modified PMMA nanofibres. Other peaks present in the spectra of pure, surface-roughened, and coaxial hollow PMMA nanofibres with the samarium complex incorporated originated from, for example, intermediate energy levels, donor-acceptor pair transitions, oxygen vacancies, and interstitial ions present in the prepared complexes.…”

Section: Photoluminescence Analysismentioning

confidence: 79%

“…Peaks for the samarium complexes were observed at 598 nm and 644 nm that, respectively, represented emissions from 4 G 5/2 to 6 H 7/2 and to 6 H 9/2 of interstitial Sm 3+ ions present in the complex, as described previously. [24,34,[36][37][38][39][40] The peaks of samarium complexes incorporated in these nanofibres showed the maximum intensity at an excitation wavelength of 320 nm. Therefore, PL analyses clearly showed the successful incorporation of the samarium complex into PMMA nanofibres.…”

Section: Photoluminescence Analysismentioning

confidence: 99%

Studies on the structural and optical properties of samarium β‐diketonate complex incorporated electrospun poly(methylmethacrylate) nanofibres with different architectures

Philip

Jose

et al. 2021

Luminescence

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Electrospinning is the most favourable method for production of polymer nanofibres.In this study, we prepared a samarium β-diketonate complex that incorporated pure, surface-roughened and coaxial hollow poly(methylmethacrylate) (PMMA) nanofibres through electrospinning. The successful incorporation of this samarium complex into the PMMA nanofibres with different architectures was elucidated through various structural and morphological studies. Optical investigations as well as other characterization techniques for the pure, surface-roughened and coaxial hollow PMMA nanofibres before and after incorporating the samarium β-diketonate complex explained the host matrix nature of the PMMA nanofibres. Photoluminescence properties of the pure and structurally modified PMMA nanofibres were enhanced two or three times after incorporating the samarium complex into the fibre. Comparison of the optical properties between the pure and structurally modified PMMA nanofibres incorporating the samarium β-diketonate complex demonstrated the structural and optical improvements as well as the better host matrix nature of the surfaceroughened and coaxial hollow PMMA nanofibres over pure PMMA nanofibres for the samarium β-diketonate complex. These optical enhancements make these materials applicable for various optical devices.

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Preparation, characterization and luminescence behavior of some samarium complexes

Cited by 27 publications

References 52 publications

Magnetic and Luminescence Properties of 8-Coordinated Pyridyl Adducts of Samarium(III) Complexes Containing 4,4,4-Trifluoro-1-(naphthalen-2-yl)-1,3-butanedionate

Magnetic and Luminescence Properties of 8-Coordinated Pyridyl Adducts of Samarium(III) Complexes Containing 4,4,4-Trifluoro-1-(naphthalen-2-yl)-1,3-butanedionate

Augmentation of photophysical features and Judd–Ofelt analysis of extensively green glowing terbium (III) complexes with nitrogen donor ancillary ligands

Studies on the structural and optical properties of samarium β‐diketonate complex incorporated electrospun poly(methylmethacrylate) nanofibres with different architectures

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