Ultraviolet up-conversion luminescent tetrahalozincates(II) with triphenylphosphonium cation: Synthesis, optical properties, and DFT calculations Full article
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Materials Today Chemistry
ISSN: 2468-5194 |
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| Output data | Year: 2024, Volume: 39, Article number : 102173, Pages count : 9 DOI: 10.1016/j.mtchem.2024.102173 | ||
| Tags | Up-conversion luminescence, Ultraviolet luminescence, Non-covalent interaction, Tetrahalozincate(II), Triphenylphosphonium | ||
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Abstract:
Luminescent [HL]2[ZnX4] [X = Cl, Br] tetrahalozincate(II) compounds with triphenylphosphonium cation (HL = Ph3PH) were isolated using hydrohalic acids. This study reports the synthesis, crystal structures, and photophysical properties of novel tetrahalozincate(II) compounds. The [HL]2[ZnCl4] and [HL]2[ZnBr4] crystallize in the P21/c monoclinic and Pbca rhombic space groups, respectively. The compounds exhibit a strong ultraviolet (UV–B, λmax ≈ 290 nm) fluorescence and blue-green and green phosphorescence in solid state, with a high quantum efficiency (up to 78 %). The luminescence mechanism was investigated, revealing that the UV-B and green emissions are ascribed to the {ZnX4}h-{Ph3PH}e exciton-phonon emission, and the blue-green emission arises from the transition within the organic moiety. The [HL]2[ZnCl4] compound shows an unexpected up-conversion luminescence at 305 nm under 405 nm excitation, presumably caused by stepwise two-photon absorption accompanied by proton-coupled electron transfer. The up-conversion luminescence make this compounds a promising candidate for simple and cost-effective materials for visible-to-ultraviolet converter devices.
Cite:
Berezin A.S.
Ultraviolet up-conversion luminescent tetrahalozincates(II) with triphenylphosphonium cation: Synthesis, optical properties, and DFT calculations
Materials Today Chemistry. 2024. V.39. 102173 :1-9. DOI: 10.1016/j.mtchem.2024.102173 WOS Scopus РИНЦ OpenAlex
Ultraviolet up-conversion luminescent tetrahalozincates(II) with triphenylphosphonium cation: Synthesis, optical properties, and DFT calculations
Materials Today Chemistry. 2024. V.39. 102173 :1-9. DOI: 10.1016/j.mtchem.2024.102173 WOS Scopus РИНЦ OpenAlex
Dates:
| Submitted: | Mar 6, 2024 |
| Accepted: | Jun 19, 2024 |
| Published print: | Jun 26, 2024 |
| Published online: | Jun 26, 2024 |
Identifiers:
| Web of science: | WOS:001261558400001 |
| Scopus: | 2-s2.0-85196834068 |
| Elibrary: | 68428455 |
| OpenAlex: | W4400029809 |