Remote Control of the Synthesis of a [2]Rotaxane and its Shuttling via Metal-Ion Translocation.

ABSTRACT: Remote control in an eight-component network commanded both the synthesis and shuttling of a [2]rotaxane via metal-ion translocation, the latter being easily monitored by distinct colorimetric and fluorimetric signals. Addition of zinc(II) ions to the red colored copper-ion relay station rapidly liberated copper(I) ions and afforded the corresponding zinc complex that was visualized by a bright sky blue fluorescence at 460 nm. In a mixture of all eight components of the network, the liberated copper(I) ions were translocated to a macrocycle that catalyzed formation of a rotaxane by a double-click reaction of acetylenic and diazide compounds. The shuttling frequency in the copper-loaded [2]rotaxane was determined to k ₂₉₈=30 kHz (ΔH ^≠=62.3±0.6 kJ mol

SUBMITTER: Paul I 

PROVIDER: S-EPMC6863578 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature