Mn2+-Yb3+ back and forth energy transfer by super-exchange interaction in bismuth silicate glass
| Autor: | H. Félix-Quintero, C. Falcony, L. Mariscal-Becerra, E.V. Mejía-Uriarte, J. Hernández A., E. Camarillo G., C. Flores J., H. Murrieta S. |
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| Rok vydání: | 2021 |
| Předmět: |
Diffraction
Materials science Quenching (fluorescence) Energy transfer Exchange interaction Biophysics Analytical chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Biochemistry Atomic and Molecular Physics and Optics 0104 chemical sciences Bismuth Absorbance chemistry 0210 nano-technology Silicate glass Excitation |
| Zdroj: | Journal of Luminescence. 230:117733 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/j.jlumin.2020.117733 |
| Popis: | Bismuth silicate glasses at various compositions of Mn2+ and Yb3+ were successfully synthesized by conventional melt and quenching method of 40% Bi2O3: 60% SiO2. Mn2+ presents a simultaneous green-orange emission by means of simultaneous four and six folded coordination when exciting with 350 nm and by up-conversion when exciting with 980 nm Yb3+ presents its known 976 nm emission by its 2F5/2 → 2F7/2 transition when exciting at 350 nm in 6A1(S) → 4E(D) Mn2+ energy level. This is proposed to be possible by the existence of Mn2+-Yb3+ dimers, that produce new energy levels seen in absorbance and excitation scheme labeled as 2F7/26A1(S) → 2F5/24T2(G), 2F7/26A1(S) → 2F5/24T1(G), 2F7/26A1(S) → 2F7/24T2(G) and 2F7/26A1(S) → 2F7/24T1(G) centered at 471, 521, 588 and 622 nm respectively. An energy diagram is presented to show the mechanism of this back and forth energy transfer. Absorbance, x-ray diffraction, excitation and emission spectroscopic studies are shown. |
| Databáze: | OpenAIRE |
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