New Promesogenic Ligands for Host Medium Microencapsulation by Quantum Dots via Liquid Crystal Phase Transition Templating
New Promesogenic Ligands for Host Medium Microencapsulation by Quantum Dots via Liquid Crystal Phase Transition Templating
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DOI：
10.1021/acsanm.9b00476
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发表时间：
2019-03
影响因子：
5.9
通讯作者：
A. Keshavarz;Sheida T. Riahinasab;L. Hirst;B. Stokes
中科院分区：
文献类型：
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作者：
A. Keshavarz;Sheida T. Riahinasab;L. Hirst;B. Stokes
介绍了一类用于量子点纳米粒子自组装的新型促生灾难性侧系有机配体的设计、合成、性能和性能。这项工作的动机是不充分的模块化，步数和产率与现有的配体的合成。将新的配体附着在量子点上，并将其分散在液晶宿主中，通过相变模板可以形成微米大小的空心胶囊。这种胶囊抵抗高达350°c的热分解，比以前报道的任何由侧面系固的灾难性配体功能化纳米颗粒组装的微胶囊都要高。这些新型配体可用于需要在高温下保持稳定性的封装应用。通过小角度x射线散射对胶囊的评价表明，颗粒间距根据所使用的配体的不同在10 ~ 13 nm之间变化，并与氨基烷基链长度相关。
The design, synthesis, properties, and performance of a new class of promesogenic calamitic side-tethering organic ligands used to direct quantum dot nanoparticle self-assembly are described. This work was motivated by inadequate modularity, step count, and yield associated with syntheses of existing ligands. Attaching the new ligands to quantum dots and dispersing them in a liquid crystal host affords hollow micrometer-sized capsules via phase transition templating. The capsules resist thermal decomposition up to 350 °C—significantly higher than any previously reported microcapsules assembled from side-tethering calamitic ligand-functionalized nanoparticles. These novel ligands can be used for encapsulation applications where stability under high temperature is required. Evaluation of the capsules by small-angle X-ray scattering shows that interparticle spacing varies from 10 to 13 nm depending on the ligand used and is correlated to aminoalkyl chain length.