Karpov Oleg N, Bondarenko Galina N, Merekalov Alexey S, Shandryuk Georgiy A, Zhigalina Olga M, Khmelenin Dmitriy N, Skryleva Elena A, Golovan Leonid A, Talroze Raisa V
A.V. Topchiev Institute of Petrochemical Synthesis Russian Academy of Sciences, Moscow 119991, Russia.
Shubnikov Institute of Crystallography, Federal Research Center "Crystallography and Photonics", Russian Academy of Sciences, Moscow 119333, Russia.
ACS Appl Mater Interfaces. 2021 Aug 4;13(30):36190-36200. doi: 10.1021/acsami.1c10315. Epub 2021 Jul 21.
Embedding quantum dots (QDs) into an organic matrix of controllable order requires the identification of their structural characteristics. This analysis is necessary for the creation of anisotropic composites that are sensitive to external stimuli. We have studied the QD structures formed during the single-step synthesis of CdSe/ZnS QDs and their transformations after the initial ligand's substitution for another ligand. This single-step process leads to the formation of the core/shell structure. We detect the presence of two oleic acid residues ionically connected to Zn and Cd. At the same time, the amount of Cd oleate at the surface is very small. We observe the ligand exchange process at the surface of the core/shell QDs. The oleic acid residues are substituted by terphenyl-containing (TERPh-COOH) aromatic acid residues. The reaction between CdSe/ZnS carrying TOP and oleic acid residues ionically bound with QDs and terphenyl-containing acid leads to the coexistence of multiple ligands on the QD surface at a ratio of 11:6:33 for TOP/OA/TERPh-COOH.
将量子点（QD）嵌入具有可控有序性的有机基质中需要确定其结构特征。这种分析对于创建对外部刺激敏感的各向异性复合材料是必要的。我们研究了在CdSe/ZnS量子点单步合成过程中形成的量子点结构，以及初始配体被另一种配体取代后的转变情况。这种单步过程导致了核/壳结构的形成。我们检测到存在两个与锌和镉离子连接的油酸残基。同时，表面油酸镉的量非常少。我们观察到核/壳量子点表面的配体交换过程。油酸残基被含三联苯的（TERPh-COOH）芳香酸残基取代。携带TOP和与量子点离子结合的油酸残基的CdSe/ZnS与含三联苯酸之间的反应导致量子点表面多种配体以TOP/OA/TERPh-COOH为11:6:33的比例共存。
