Internal dynamics and guest binding of a sterically overcrowded host.

ABSTRACT: Substituent control in self-assembled host systems allows for a fine-tuning of structure, dynamics and guest preference. Flat banana-shaped ligands L¹ assemble with Pd(ii) cations into the interpenetrated coordination cage dimer [3BF₄@Pd₄L¹₈], capable of sequential guest uptake. In contrast, the introduction of bulky adamantyl groups in ligand L² prevents dimerization and results in the clean formation of monomeric cage species [Pd₂L²₄]. Owing to steric crowding, the adamantyl substituent is considerably bent sideways with respect to the ligand backbone, and is rapidly flipping between both faces of the free ligand giving rise to two energetically degenerate confor

SUBMITTER: Loffler S 

PROVIDER: S-EPMC6013793 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature