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Photoswitchable supramolecular catalysis by interparticle host-guest competitive binding

机译:粒子间客体竞争结合的光可开关超分子催化

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摘要

On and off: Ester hydrolysis catalyzed by a Zn ~(II)-coordinated β-cyclodextrin dimer can be switched on and off using light in the presence of gold nanoparticles with azobenzene units attatched to their surfaces. Under visible light, the azobenzene units are trans and bind tightly to the dimer, thus leading to reduced catalysis. Under UV light, the azobenzene units are cis and bind loosely to the dimer, thus allowing substrates to bind and hydrolysis to occur.
机译:开和关:在存在偶氮苯单元附着在其表面上的金纳米粒子的存在下,可以使用光打开和关闭由Zn〜(II)配位的β-环糊精二聚体催化的酯水解。在可见光下,偶氮苯单元是反式的,并与二聚体紧密结合,从而导致催化作用降低。在紫外光下,偶氮苯单元为顺式且松散结合至二聚体,因此使底物结合并发生水解。

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