Phenazine-based supramolecular photosensitizing assemblies:A“smart”selectivity control on catalytic activity of Pd(Ⅱ)nanoparticles  

作　　者：Aditya Singh Manoj Kumar Vandana Bhalla 

机构地区：[1]Department of Chemistry,UGC Sponsored-Centre of Advance Studies-Ⅱ,Guru Nanak Dev University,Amritsar,Punjab,India

出　　处：《Aggregate》2023年第1期173-183,共11页聚集体（英文）

基　　金：SERB,New Delhi,Grant/Award Number:CRG/2018/001274;SERB Power fellowship,Grant/Award Number:SPF/2021/000019;CSIR,New Delhi,Grant/Award Number:02(0358/19/EMR-II);RUSA2.0(Component-4);DST for support under FIST and PURSE programme。

摘　　要：Photosensitizing supramolecular assemblies based on a phenazine derivative(PPA)have been developed,which show a strong affinity toward Pd2+ions to generate supramolecular ensemble PPA@Pd nanoparticles(NPs).The PPA@Pd NPs catalyse the Suzuki cross-coupled reaction under mild conditions(aerial conditions,mixed aqueous media,and visible light radiations).Although PPA@Pd NPs exhibit a strong affinity for arylboronic acid and could catalyse homocoupling of arylboronic acid,the preference of PPA assemblies for aryl halide directed the course of reactions toward the formation of cross-coupled products.The electron-rich PPA assemblies not only facilitate the oxidative addition step through photoinduced electron transfer to Pd^(2+)ions but also bring the reactants closer to the catalytic sites by selective interactions with aryl halides in the presence of arylboronic acid under visible light irradiation.The efficiency of PPA@Pd NPs to catalyse the Suzuki crosscoupled reaction has been demonstrated for the synthesis of unsymmetrically substituted terphenyl derivatives.

关 键 词：ENSEMBLE HOMOCOUPLING PHENAZINE photosensitizing supramolecular assemblies Suzuki cross-coupled 

分 类 号：O641.3[理学—物理化学]