Tuning catalysis of boronic acids in microgels by in situ reversible structural variations. Issue 7 (22nd January 2020)

• Record Type: Journal Article
• Authors: Zhai, Zhenghao; Du, Xue; Wu, Qingshi; Zhu, Lin; Farooqi, Zahoor H.; Li, Jin; Lan, Ruyue; Wang, Yusong; Wu, Weitai
• Is Part Of: RSC advances. Volume 10:Issue 7(2020)
• Page Start: 3734
• Page End: 3744
• Publication Date: 2020-01-22
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra10541g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Catalysis of boronic acids immobilized in polymer microgels can be modulated by bubbling with N2 /CO2 gas, and in some cases by adding glucose, making their catalytic activity being enhanced and making the microgels able to catalyze alternate reactions. Abstract : The catalysis of boronic acids immobilized in polymer microgels can be modulated by bubbling with N2 /CO2 gas, and in some cases by adding glucose, making their catalytic activity comparable or even superior to that of the corresponding free boronic acid monomers homogeneously dispersed in solutions and, more importantly, making these boronic-acid-containing polymer microgels able to catalyze alternate reactions that may extend the usefulness. This enhanced catalytic function of these boronic-acid-containing microgels as organoboron acid catalysts is plausibly achieved via in situ reversibly structural variations. Kinetic studies have been carried out on the model boronic-acid-catalyzed aza-Michael addition, aldol, amidation, and [4 + 2] cycloaddition reactions in order to better understand the catalytic process.