Anion-capped metallohost allows extremely slow guest uptake and on-demand acceleration of guest exchange.

ABSTRACT: The switching of molecular recognition selectivity is important for tuning molecular functions based on host-guest binding. While the switching processes in artificial functional molecules are usually driven by changes of the thermodynamic stabilities, non-equilibrium phenomena also play an important role in biological systems. Thus, here we designed a host-guest system utilizing a non-equilibrium kinetically trapped state for on-demand and time-programmable control of molecular functions. We synthesized a bis(saloph) macrocyclic cobalt(III) metallohost 1(OTf)₂, which has anion caps at both sides of the cation-binding site. The anion caps effectively retard the guest uptake/release so that we can easily make a non-equilibrium kinetically trapped state. Indeed, we can obtain a lo

SUBMITTER: Sakata Y 

PROVIDER: S-EPMC5510176 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature