Gesellschaft Deutscher Chemiker
Keine Benachrichtigungen
Sie haben noch keine Lesezeichen
Abmelden

Artikel

An Organo‐Palladium Host Built from a Dynamic Macrocyclic Ligand: Adaptive Self‐Assembly, Induced‐Fit Guest Binding, and Catalysis

Von Wiley-VCH zur Verfügung gestellt

Induced-fit self-assembly using a pyridinium-based dynamic macrocyclic ligand gives rise to a new water-soluble adaptive organo-palladium host. Co-encapsulation of both an electron-rich W10O32 4− cluster and toluene derivatives within the redox-active host facilitates efficient and selective C−H photooxidation under mild conditions.


Abstract

Artificial hosts with rich conformational dynamics are attractive to supramolecular chemists due to their adaptive guest-binding properties and enzyme-like catalytic functions. We report here the adaptive self-assembly and host-guest catalysis of a new water-soluble organo-palladium host (Pd2L2) built from a pyridinium-bonded macrocyclic ligand (L) and cis-blocked palladium corners (Pd). While the direct self-assembly of L with Pd gives rise to a dynamic mixture of products, both neutral polyaromatic hydrocarbons and an anionic polyoxometalate cluster (W10O32 4−) can template the dominant formation of the Pd2L2 host. Guest-adaptive conformational changes and induced-fit cavity deformation of the Pd2L2 host have been clearly observed in the crystal structures. Moreover, the installation of the electron-rich W10O32 4− cluster within the cationic redox-active host (W10O32⊂Pd2L2) facilitates the efficient and selective C−H photooxidation of toluene derivatives to aldehyde products under mild conditions, thus representing an ideal platform for green supramolecular catalysis.

Zum Volltext

Überprüfung Ihres Anmeldestatus ...

Wenn Sie ein registrierter Benutzer sind, zeigen wir in Kürze den vollständigen Artikel.