{"title":"Ultraviolet up-conversion luminescent tetrahalozincates(II) with triphenylphosphonium cation: Synthesis, optical properties, and DFT calculations","authors":"Alexey S. Berezin","doi":"10.1016/j.mtchem.2024.102173","DOIUrl":null,"url":null,"abstract":"Luminescent [HL][ZnX] [X = Cl, Br] tetrahalozincate(II) compounds with triphenylphosphonium cation (HL = PhPH) were isolated using hydrohalic acids. This study reports the synthesis, crystal structures, and photophysical properties of novel tetrahalozincate(II) compounds. The [HL][ZnCl] and [HL][ZnBr] crystallize in the 2/ monoclinic and 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 {ZnX}-{PhPH} exciton-phonon emission, and the blue-green emission arises from the transition within the organic moiety. The [HL][ZnCl] 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.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":6.7000,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Today Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1016/j.mtchem.2024.102173","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Luminescent [HL][ZnX] [X = Cl, Br] tetrahalozincate(II) compounds with triphenylphosphonium cation (HL = PhPH) were isolated using hydrohalic acids. This study reports the synthesis, crystal structures, and photophysical properties of novel tetrahalozincate(II) compounds. The [HL][ZnCl] and [HL][ZnBr] crystallize in the 2/ monoclinic and 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 {ZnX}-{PhPH} exciton-phonon emission, and the blue-green emission arises from the transition within the organic moiety. The [HL][ZnCl] 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.
期刊介绍:
Materials Today Chemistry is a multi-disciplinary journal dedicated to all facets of materials chemistry.
This field represents one of the fastest-growing areas of science, involving the application of chemistry-based techniques to the study of materials. It encompasses materials synthesis and behavior, as well as the intricate relationships between material structure and properties at the atomic and molecular scale. Materials Today Chemistry serves as a high-impact platform for discussing research that propels the field forward through groundbreaking discoveries and innovative techniques.