Catalytically-active porous assembly with dynamic pulsating motion for efficient exchange of products and reagents
作者：Shanshan Wu, Liping Huang, Yu Hou, Xin Liu, Jehan Kim, Zhegang Huang*
關鍵字：porous catalyst，thermal stimulus，dynamic pulsating motion，exchange of reagents and products
論文來源：期刊
具體來源：COMMUNICATIONS CHEMISTRY
發表時間：2020年
Despite recent advances in the use of porous materials as efficient heterogeneous catalysts
which operate through effectively trapping reagents in a well-defined space, continuously
uptaking reagents to substitute products in the cavity for efficient product turnover still
remains challenging. Here, a porous catalyst is endowed with ‘breathing’ characteristics by
thermal stimulus, which can enable the efficient exchange of reagents and products through
reversible stacking from inflated aromatic hexamers to contracted trimeric macrocycles. The
contracted super-hydrophobic tubular interior with pyridine environment exhibits catalytic
activity towards a nucleophilic aromatic substitution reaction by promoting interactions
between concentrated reagents and active sites. Subsequent expansion facilitates the
exchange of products and reagents, which ensures the next reaction. The strategy of
mesoporous modification with inflatable transition may provide a new insight for construction
of dynamic catalysts.