Supramolecular photocatalyst of Palladium (II) Encapsulated within Dendrimer on TiO
<sub>2</sub>
nanoparticles for Photo‐induced Suzuki‐Miyaura and Sonogashira Cross‐Coupling reactions
作者:Ameneh Eskandari、Maasoumeh Jafarpour、Abdolreza Rezaeifard、Mehri Salimi
DOI:10.1002/aoc.5093
日期:2019.10
TiO2) is presented. The obtained nanodendritic catalyst was characterized by FT‐IR, ICP‐AES, XPS, EDS, TEM, TGA and UV‐DRS. The as‐prepared nanodendritic catalyst was shown to be highly active, selective, and recyclable for the Suzuki–Miyaura and Sonogashira cross‐coupling of a wide range of aryl halides including electron‐rich and electron‐poor and even aryl chlorides, affording the corresponding biaryl
在这项研究中,一种新型的超分子光催化体系的合成,表征和催化性能,包括包裹在胺封端的聚三嗪-三胺树枝状聚合物修饰的TiO 2纳米颗粒中的钯(II)(Pd(II)[PTATAD] @ TiO 2)) 被呈现。通过FT-IR,ICP-AES,XPS,EDS,TEM,TGA和UV-DRS对得到的纳米树状催化剂进行了表征。所制备的纳米树状催化剂被证明具有高活性,选择性和可回收性,可用于多种芳族卤化物的铃木-宫浦和Sonogashira交叉偶联,包括富电子,贫电子甚至芳基氯化物,提供了相应的芳基化合物在可见光照射下具有良好或优异的收率。这项研究表明,可见光辐射可以驱动Pd(II)[PTATAD] @ TiO 2上的交叉偶联反应在温和的反应条件下(27–30°C),无需其他添加剂,例如助催化剂或膦配体。因此,我们建议改善光活性主要受益于Pd(II)胺端基的聚(三嗪-三胺)树状大分子对TiO 2纳米粒子的