Reversible Covalent Assembly of Nanoparticles through On-Surface Diels–Alder Reaction
作者:Markus B. Schütz、Khan Lê、Shaista Ilyas、Sanjay Mathur
DOI:10.1021/acs.langmuir.9b02261
日期:2020.2.18
organic ligands were used for performing on-surface Diels-Alder reactions. Driven through their chemical affinity and surface-grafted complementary functionalities, nanoparticles underwent click-reactions to produce covalently organized nanostructures. An advantage of using the Diels-Alder reaction is its reversible nature, which was used to click and unclick the nanoparticles on demand. The efficiency
我们在这里展示了基于化学特异性共价键相互作用将单个纳米级构建基块受控组装成定义的体系结构。为此,使用装饰有表面共轭有机配体的α-Fe2O3,γ-Fe2O3和SiO2纳米颗粒进行表面Diels-Alder反应。通过其化学亲和力和表面嫁接的互补功能,纳米颗粒经历了点击反应以产生共价组织的纳米结构。使用Diels-Alder反应的优点是其可逆性,可用于按需单击和取消单击纳米粒子。这种方法的效率和化学特异性开辟了另一种合成途径,以统一具有互补特性的材料,粒子组件的热响应特性赋予它们完全可逆的特性。这项工作中证明的共价结合策略可能允许使用多种不同的颗粒和配体,以将其应用于医学,光学或光子学等不同学科。通过TEM和XRD分析研究了纳米颗粒的形貌和结晶性质,同时通过NMR,FTIR,UV-vis和ζ电位测量验证了表面附着基团的存在。