A Halomanganates(II) with P,P’-Diprotonated Bis(2-Diphenylphosphinophenyl)ether: Wavelength-Excitation Dependence of the Quantum Yield and Role of the Non-Covalent Interactions
A [H<sub>2</sub>DPEphos][MnX<sub>4</sub>] [X = Br, Cl] tetrahalomanganates(II) with P,P’-diprotonated bis[2-(diphenylphosphino)phenyl]ether cation has been designed and investigated in photophysics and EPR terms. The complexes exhibit a green luminescence resulted from the Mn...
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| Format: | Article |
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MDPI AG
2021-06-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/22/13/6873 |
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| author | Alexey S. Berezin |
| author_facet | Alexey S. Berezin |
| author_sort | Alexey S. Berezin |
| collection | DOAJ |
| description | A [H<sub>2</sub>DPEphos][MnX<sub>4</sub>] [X = Br, Cl] tetrahalomanganates(II) with P,P’-diprotonated bis[2-(diphenylphosphino)phenyl]ether cation has been designed and investigated in photophysics and EPR terms. The complexes exhibit a green luminescence resulted from the Mn(II) <i>d</i>–<i>d</i> transitions (<sup>4</sup><i>T</i><sub>1</sub>→<sup>6</sup><i>A</i><sub>1</sub>) with the wavelength-excitation dependence of the quantum yield. The solid [H<sub>2</sub>DPEphos][MnBr<sub>4</sub>] complex exhibits a bright green phosphorescence (λ<sub>max</sub> = 515 nm) with the high luminescence quantum yield depending on the excitation energy whereas the solid [H<sub>2</sub>DPEphos][MnCl<sub>4</sub>] complex exhibits a very weak phosphorescence (λ<sub>max</sub> = 523 nm). The unexpected shorter luminescence lifetime for the [H<sub>2</sub>DPEphos][MnCl<sub>4</sub>] than for the [H<sub>2</sub>DPEphos][MnBr<sub>4</sub>] at 300 K can be a result of the higher non-radiative relaxation contribution. On the one hand, the non-covalent PH…X(Mn) interactions quench the manganese(II) luminescence. On the other hand, the PH…X(Mn) interactions are a pathway of the excitation transfer from [H<sub>2</sub>DPEphos]<sup>2+</sup> to [MnX<sub>4</sub>]<sup>2−</sup>. |
| first_indexed | 2024-03-10T10:01:40Z |
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| language | English |
| last_indexed | 2024-03-10T10:01:40Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
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| series | International Journal of Molecular Sciences |
| spelling | doaj.art-7646e58977444fcfb240775e8e05eb2d2023-11-22T01:51:43ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672021-06-012213687310.3390/ijms22136873A Halomanganates(II) with P,P’-Diprotonated Bis(2-Diphenylphosphinophenyl)ether: Wavelength-Excitation Dependence of the Quantum Yield and Role of the Non-Covalent InteractionsAlexey S. Berezin0Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, Acad. Lavrentiev Ave., 3, 630090 Novosibirsk, RussiaA [H<sub>2</sub>DPEphos][MnX<sub>4</sub>] [X = Br, Cl] tetrahalomanganates(II) with P,P’-diprotonated bis[2-(diphenylphosphino)phenyl]ether cation has been designed and investigated in photophysics and EPR terms. The complexes exhibit a green luminescence resulted from the Mn(II) <i>d</i>–<i>d</i> transitions (<sup>4</sup><i>T</i><sub>1</sub>→<sup>6</sup><i>A</i><sub>1</sub>) with the wavelength-excitation dependence of the quantum yield. The solid [H<sub>2</sub>DPEphos][MnBr<sub>4</sub>] complex exhibits a bright green phosphorescence (λ<sub>max</sub> = 515 nm) with the high luminescence quantum yield depending on the excitation energy whereas the solid [H<sub>2</sub>DPEphos][MnCl<sub>4</sub>] complex exhibits a very weak phosphorescence (λ<sub>max</sub> = 523 nm). The unexpected shorter luminescence lifetime for the [H<sub>2</sub>DPEphos][MnCl<sub>4</sub>] than for the [H<sub>2</sub>DPEphos][MnBr<sub>4</sub>] at 300 K can be a result of the higher non-radiative relaxation contribution. On the one hand, the non-covalent PH…X(Mn) interactions quench the manganese(II) luminescence. On the other hand, the PH…X(Mn) interactions are a pathway of the excitation transfer from [H<sub>2</sub>DPEphos]<sup>2+</sup> to [MnX<sub>4</sub>]<sup>2−</sup>.https://www.mdpi.com/1422-0067/22/13/6873manganese(II)luminescenceEPRnon-covalent interactionDFT |
| spellingShingle | Alexey S. Berezin A Halomanganates(II) with P,P’-Diprotonated Bis(2-Diphenylphosphinophenyl)ether: Wavelength-Excitation Dependence of the Quantum Yield and Role of the Non-Covalent Interactions International Journal of Molecular Sciences manganese(II) luminescence EPR non-covalent interaction DFT |
| title | A Halomanganates(II) with P,P’-Diprotonated Bis(2-Diphenylphosphinophenyl)ether: Wavelength-Excitation Dependence of the Quantum Yield and Role of the Non-Covalent Interactions |
| title_full | A Halomanganates(II) with P,P’-Diprotonated Bis(2-Diphenylphosphinophenyl)ether: Wavelength-Excitation Dependence of the Quantum Yield and Role of the Non-Covalent Interactions |
| title_fullStr | A Halomanganates(II) with P,P’-Diprotonated Bis(2-Diphenylphosphinophenyl)ether: Wavelength-Excitation Dependence of the Quantum Yield and Role of the Non-Covalent Interactions |
| title_full_unstemmed | A Halomanganates(II) with P,P’-Diprotonated Bis(2-Diphenylphosphinophenyl)ether: Wavelength-Excitation Dependence of the Quantum Yield and Role of the Non-Covalent Interactions |
| title_short | A Halomanganates(II) with P,P’-Diprotonated Bis(2-Diphenylphosphinophenyl)ether: Wavelength-Excitation Dependence of the Quantum Yield and Role of the Non-Covalent Interactions |
| title_sort | halomanganates ii with p p diprotonated bis 2 diphenylphosphinophenyl ether wavelength excitation dependence of the quantum yield and role of the non covalent interactions |
| topic | manganese(II) luminescence EPR non-covalent interaction DFT |
| url | https://www.mdpi.com/1422-0067/22/13/6873 |
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