Molecular Decomposition Routes of Diaryl Diselenide Precursors in Relation to the Phase Determination of Copper Selenides
Molecular Decomposition Routes of Diaryl Diselenide Precursors in Relation to the Phase Determination of Copper Selenides
复制标题
DOI：
10.1021/acs.inorgchem.2c02042
复制
发表时间：
2022-09-07
影响因子：
4.6
通讯作者：
Macdonald, Janet E.
中科院分区：
文献类型：
--
作者：
Koziel, Alexandra C.;Goldfarb, Ralston B.;Macdonald, Janet E.
利用核磁共振氢谱(H-1)、核磁共振谱(Se-77)和粉末X-射线衍射谱(X射线衍射仪)对二苯基和二苯基二硒醚前驱体的热分解过程进行了研究。发现铜对这两种前体的分解都有促进作用。无机纳米晶和有机副产物对特定的二芳基二硒醚以及油胺和铜的存在很敏感。提出了分子机制路线。结果表明，硅锌矿(Cu1.8Se)、方铅矿(Cu3Se)、方铅矿(Cu3Se2)、硅锌矿(m-CuSe2)和方铅矿(p-CuSe2)均为产物。通过与有机硒前驱体的反应，发现了相间的多步转变，并提出了有机分解产物。
H-1 nuclear magnetic resonance (NMR), Se-77 NMR, and powder X-ray diffraction (XRD) were used to monitor the thermal decomposition of diphenyl and dibenzyl diselenide precursors toward the synthesis of copper selenides. Copper was found to promote the decomposition of both precursors. The inorganic nanocrystals and organic byproducts were sensitive to the specific diaryl diselenides and the presence of oleylamine and copper. Molecular mechanistic routes are proposed. Berzelianite (Cu1.8Se), klockmannite (CuSe), umangite (Cu3Se2), and both petricekite (m-CuSe2) and krutaite (p-CuSe2) were identified as products. Multistep transformations between phases were discovered through reactions with the organoselenium precursors, and organic decomposition products are proposed.