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Photocontrolled lactide ROP by the light-regulated release of potassium acetate from an azobenzene-bridged crown ether
Catalysis Science & Technology ( IF 5 ) Pub Date : 2021-08-26 , DOI: 10.1039/d1cy01071a
Quentin De Roover 1, 2 , Timothé Vucko 3 , Stéphane P. Vincent 3 , Julien De Winter 2 , Olivier Coulembier 1
Affiliation  

An azobenzene-bridged 15-crown-5 ether (1) was successfully used as a photoswitchable cocatalyst for modulating the catalytic activity of potassium acetate (KOAc) in the ring-opening polymerization (ROP) of L-lactide (L-LA) when initiated from an exogenous alcohol. By alternating exposure to daylight and UV light, 1 transforms the K+,OAc ion pair-like in free ions “on-demand”, resulting in an effective form of the catalytic complex. This allows the modulation of the L-LA ROP speed, switching the process from a slow to a fast state.

中文翻译:

偶氮苯桥联冠醚光控释放醋酸钾光控丙交酯 ROP

偶氮苯桥连的 15-crown-5 醚 ( 1 ) 成功用作光开关助催化剂,用于调节乙酸钾 (KOAc) 在L-丙交酯 ( L -LA)开环聚合 (ROP) 中的催化活性。从外源性酒精开始。通过交替暴露于日光和紫外线下,1 “按需”转化游离离子中的 K + , - OAc 离子对,从而形成有效形式的催化复合物。这允许调节L -LA ROP 速度,将过程从慢速状态切换到快速状态。
更新日期:2021-09-08
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