Research Field

I. The new frustrated Lewis acid-base pair (FLP) system realizes the controllable polymerization of a variety of renewable monomers and petroleum-based monomers

  The frustrated Lewis acid-base pair (FLP) is a steric hindrance. There are both Lewis acid and Lewis base that are not quenched by each other in the system. Our research group is committed to the use of FLP system in catalytic active polymerization to achieve precise control of polymer structure: the development of nitrogen heterocyclic olefin (NHO) and the appropriate Lewis acid composition FLP system, to achieve petroleum-based monomer MMA, renewable Active controllable polymerization of monomeric caprolactone (CL) and valerolactone (VL); developed an FLP system composed of super strong phosphonic acid base and Lewis acid, which realizes the synthesis of ultra-high molecular weight PMMA and methyl group at room temperature The sequence of acrylic monomers can be controlled to polymerize, resulting in the world-record 53 block polymer. We also used Lewis acid-base pair composed of enol silicon ether and Al(C₆F₅)₃ or B(C₆F₅)₃ to realize the biomass monomer γ-methyl-α-vinyl-γ-butyrolactone (MMBL) Living controllable polymerization.

1. The FLP system composed of NHO catalyzes the living controllable polymerization of polar vinyl monomers and lactones

2. FLP synthetic ultra-high molecular weight polymer composed of super strong phosphine base

3. SKA/Al(C₆F₅)₃ system catalyzes the active group transfer polymer of renewable monomer MMBL

II. The degradation of lignin model compounds and lignin achieved by classic organic chemistry methods

  Lignin is an aromatic natural macromolecular polymer with a complex structure, which is mainly connected by C-O or C-C bonds in the form of phenylpropane monomers, of which β-O-4 bonds account for a large proportion (>50%). Therefore, the cleavage of β-O-4 bond can effectively degrade lignin. We applied the classic organic name reaction (Baeyer-Villiger (BV) oxidation reaction, Beckmann rearrangement reaction) and photocatalytic reaction to the degradation of lignin, and realized the selective degradation of lignin under mild conditions. And the breaking of the C-C bond of lignin. At the same time, a variety of degradation platform products containing aromatic rings can be generated, which lays the foundation for the further application of lignin.

1. Using the organic name reaction to achieve the cleavage of the C-C bond of the lignin model compound

2. Take advantage of the inherent properties of α-OH in the lignin structure to achieve direct photocatalytic degradation of lignin under mild conditions

III. Lewis acid-base system catalyzes the regioselective silicon (boron) alkylation of alkaloid indole C3

  Indole and its derivatives, as a type of natural organic bases that exist in nature and have biological activity, have a wide range of applications in the fields of synthesis, materials and medicinal chemistry, which has aroused people's research interest. Using Lewis acid B(C₆F₅)₃ or Al(C₆F₅)₃, we successfully achieved indole C3 regioselective silanization and boronation.

1. B(C₆F₅)₃ catalyzes the indole C3 silylation and borane reaction

2. Thermally induced FLP system containing Al(C₆F₅)₃ catalyzes switchable silylation of indole C3

3. Indole silanization catalyzed by B(C₆F₅)₃ to synthesize silicon-containing polymers