Redox-Switchable Poly-Lewis Acids Allow the Controlled Release of Guests.

ABSTRACT: Presently, there is a notable interest in poly-Lewis acids (PLAs), their host-guest chemistry and their application in catalytic processes. The present study combines PLAs with redox-active dibenzo[a,e]cyclooctatetraene (dbCOT) units. dbCOT-based PLAs can be planarised by a two-electron reduction. The molecular structures of the reduced PLAs, studied by sc-XRD experiments and DFT calculations, show the formation of extended π$\upi$ -systems. This π$\upi$ -system extends to the Lewis acid functions and reduces their acidity. This allows a controlled release of complexed guest molecules. Oxidation regenerates the original Lewis acidity. Such reduction/oxidation cycles were also applied to an Al─P coordination polymer. sc-XRD shows the connectivity of the coordination polymer to remain unchan

SUBMITTER: Klingsiek MJ 

PROVIDER: S-EPMC12435436 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature