Spirobifluorene‐based Porous Organic Polymers as Efficient Porous Supports for Pd and Pt for Selective Hydrogenation
作者:Mihaela Mirela Trandafir、Lidia Pop、Niculina D. Hӑdade、Ioana Hristea、Cristian Mihail Teodorescu、Frank Krumeich、Jeroen A. van Bokhoven、Ion Grosu、Vasile I. Parvulescu
DOI:10.1002/cctc.201801247
日期:2019.1.9
Spirobifluorene‐based porous organic polymers (POP) were synthesized following two different protocols; the acetylenic coupling reaction conditions and the Sonogashira cross‐coupling reaction. These were utilized as support for the hydrogenation of a series of species containing unsaturated C=C and C=O bonds (4‐nitrostyrene, 4‐bromobenzophenone, acetophenone, 7‐nitro‐1‐tetralone and 1,2‐naphtoquinone
螺环芴基多孔有机聚合物(POP)是根据两种不同的方案合成的;炔偶联反应条件和Sonogashira交叉偶联反应。这些被用来支持一系列含有不饱和C = C和C = O键的物种的加氢反应(4-硝基苯乙烯,4-溴二苯甲酮,苯乙酮,7-硝基-1-四氢萘酮和1,2-萘醌证实了它们的有效性)。通过铜催化方案制备的POP1完全不活泼,而含有钯的POP2-4则根据底物对金属的可及性表现出不同的活性。0.5重量%的Pd的进一步沉积导致活性和稳定的催化剂。它们很容易通过过滤分离,再分散后,连续十个循环可提供相同的性能。这项研究还通过比较Pd / POP与相同钯含量的Pd / C催化剂的行为,证明了载体在这些反应中的特定作用。Pt在这些载体上的沉积导致了亚纳米级的颗粒,并因此导致了仅由选择性差异反映的不同催化行为。