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离子液体的反应活性:[C C im]BF 的还原作用,从氧化物前驱体形成红色无定形硒和 Bi Se 颗粒。

Reactivity of Ionic Liquids: Reductive Effect of [C C im]BF to Form Particles of Red Amorphous Selenium and Bi Se from Oxide Precursors.

作者信息

Knorr Monika, Schmidt Peer

机构信息

Chair of Inorganic Chemistry, Brandenburg University of Technology (BTU) Cottbus-Senftenberg Universitätsplatz 1, 01968, Senftenberg, Germany.

出版信息

ChemistryOpen. 2021 Feb;10(2):125-140. doi: 10.1002/open.202000264. Epub 2020 Dec 16.

DOI:10.1002/open.202000264
PMID:33410604
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7874247/
Abstract

Temperature-induced change in reactivity of the frequently used ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([C C im]BF ) is presented as a prerequisite for the rational screening of reaction courses in material synthesis. [C C im]BF becomes active with oxidic precursor compounds in reduction reaction at ϑ≥200 °C, even without the addition of an external reducing agent. The reaction mechanism of forming red amorphous selenium from SeO is investigated as a model system and can be described similarly to the Riley oxidation. The reactive species but-1-ene, which is formed during the decomposition of [C C im]BF , reacts with SeO and form but-3-en-2-one, water, and selenium. Elucidation of the mechanism was achieved by thermoanalytical investigations. The monotropic phase transition of selenium was analyzed by the differential scanning calorimetry. Beyond, the suitability of the single source oxide precursor Bi Se O for the synthesis of Bi Se particles was confirmed. Identification, characterization of formed solids succeeded by using light microscopy, XRD, SEM, and EDX.

摘要

温度诱导常用离子液体1-丁基-3-甲基咪唑四氟硼酸盐([C C im]BF )反应活性的变化,这是合理筛选材料合成反应过程的前提条件。在ϑ≥200 °C的还原反应中,即使不添加外部还原剂,[C C im]BF 也会与氧化前驱体化合物发生反应。以从SeO形成红色无定形硒的反应机制作为模型体系进行研究,其反应过程与莱利氧化反应类似。在[C C im]BF 分解过程中形成的活性物种1-丁烯与SeO反应,生成3-烯-2-丁酮、水和硒。通过热分析研究阐明了该反应机制。利用差示扫描量热法分析了硒的单向相变。此外,还证实了单源氧化物前驱体Bi Se O用于合成Bi Se颗粒的适用性。通过光学显微镜、XRD、SEM和EDX对所形成固体进行了鉴定和表征。

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