Tuning the Reactivity of Indium Alkanoates by Tertiary Organophosphines for the Synthesis of Indium-Based Quantum Dots
Tuning the Reactivity of Indium Alkanoates by Tertiary Organophosphines for the Synthesis of Indium-Based Quantum Dots
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DOI：
10.1021/acs.chemmater.1c03219
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发表时间：
2021-12-14
影响因子：
8.6
通讯作者：
Peng, Xiaogang
中科院分区：
文献类型：
--
作者：
Li, Yang;Hou, Xiaoqi;Peng, Xiaogang
InP、InAs和CuInS 2等铟基量子点（QD）被认为是最有前途的镉/无铅量子点候选者。目前，这些量子点的合成受到各种前体的不平衡反应性的限制，特别是链烷酸铟的缓慢反应性。在这里，我们证明，膦与铟的摩尔比超过3：1，脂肪族叔有机膦的烷酸铟的脱羧反应变得明显，形成一系列新的铟配合物，而不是纯粹提高在低摩尔比的烷酸铟的溶解度。这些新的铟配合物被证明是高活性的铟前体。通过改变有机膦和链烷酸铟的摩尔比，得到的铟络合物提供了合成高质量In基QD所需的反应性的可调性。
Indium-based quantum dots (QDs), such as InP, InAs, and CuInS2, are considered as the most promising candidates as cadmium/lead-free QDs. At present, the synthesis of these QDs is limited by the unbalanced reactivity of various precursors, specifically the sluggish reactivity of indium alkanoates. Here, we demonstrate that, with a phosphine-to-indium molar ratio beyond 3:1, decarboxylation reactions of indium alkanoates by aliphatic tertiary organophosphines become apparent, forming a series of new indium complexes, instead of purely enhancing the solubility of indium alkanoates at a low molar ratio. These new indium complexes are proven to be highly reactive indium precursors. By varying the organophosphine and indium alkanoate molar ratios, the resulting indium-complexes offer the needed tunability of reactivity for the synthesis of high-quality In-based QDs.