Towards next generation “smart” tandem catalysts with sandwiched mussel-inspired layer switch

Abstract

In this paper, we prepared a novel reactor with switchable ability to address present challenges in tandem catalyst. By introducing mussel-inspired moiety, this goal was achieved via preparing a "smart" polymer reactor which can open or closes the entry tunnel of the targeted substrate in cascade reactions. The catalyst consisted of two functional layers acting as tandem catalytic parts and one smart layer with musselinspired moieties as a controlled middle switch. The top and the bottom layer were made of molecularly imprinted polymers and catalytic components, like acidic parts and metal nanoparticles, respectively. The middle layer made of polymeric dopamine (PDPA) and acrylamide with self-healing ability will allow or inhibit the intermediate product for the reaction, thus controlling the process of the tandem catalysis. As a result, the novel catalyst exhibited self-controlled tandem catalysis, which provides new opportunities to design smart tandem catalysts, showing a promising prospect in this area.

A Trilaminar-Thermosensitive Hydrogel Catalytic Reactor Capable of Single/Tandem Catalytic Switchable Ability

“…The preparation method of the catalyst in this paper was based on other research content [27]. In details, VI (1.88 g; Scheme 1 Proposed mechanism for the SI-AMP-SVA@Ag catalytic reactor 0.02 mol), AAc (1.44 g; 0.02 mol), AgNO 3 (0.1 g), AIBN (0.06 g), MBA (0.2 g), were dissolved in DMSO (10 mL).…”

Self-switchable polymer reactor with PNIPAM-PAm smart switch capable of tandem/simple catalysis

“…As a result, only the simple hydrolysis reaction is conducted in this condition. In our previous work, we have studied similar smart tandem catalysts with bilayer or three-layer architectures [22,23]. In this work, a novel improved switchable layer was prepared and we further studied the responsive time range, response sensitivity and the repeated catalytic abilities, so as to prepare a novel reactor with higher sensitivity and ability for more stable switchable catalysis.…”

“…UV spectrophotometer (Jasco V-670) was used to study the self-controlled catalysis processes against time in a batch system [23,25]. Firstly, the spectra of initial substrate NPA (0.25 μmol/ml), the intermediate NP (0.1 μmol/ml) and the final product AP (0.1 μmol/ml) were recorded.…”

Selective Hydrolysis of Nonactivated Aryl Esters at pH 7 through Cooperative Catalysis

“…Cooperative catalysis requires the accurate positioning of catalytic groups in a substrate-tailored active site. − For artificial enzymes prepared in a bottom-up fashion, supramolecular principles of preorganization and complementarity become difficult to implement when coupled with catalytic functions. An alternative method is molecular imprinting of suitable template molecules, with the catalytic groups introduced either during imprinting or through postmodification. − …”