Disabling Molecular Recognition through Reversible Mechanical Stoppering
作者:Miguel A. Soto、Mark J. MacLachlan
DOI:10.1021/acs.orglett.9b00310
日期:2019.3.15
Mechanical stoppering of a guest molecule prevents its self-assembly with a macrocycle unit, so that both species coexist in a medium but do not recognize each other. The application of a chemical or physical stimulus reverses mechanical stoppering and subsequently enables molecular recognition. This process, which occurs without cross-reactivity and is perceptible at the macroscopic scale, could facilitate
Heterolytic Activation of H<sub>2</sub>Using a Mechanically Interlocked Molecule as a Frustrated Lewis Base
作者:Christopher B. Caputo、Kelong Zhu、V. Nicholas Vukotic、Stephen J. Loeb、Douglas W. Stephan
DOI:10.1002/anie.201207783
日期:2013.1.14
Frustrating: A sterically unencumbered aniline base (see picture, left) can be transformed into a bulky Lewisbase by converting it into a [2]rotaxane (right). This Lewisbase donor, which is surrounded by a protective macrocyclic ring, exhibits the reactivity of a frustratedLewis pair (e.g. activation of H2(g)) without the need for direct covalent modification to increase its bulk.
Mechanically Interlocked Linkers inside Metal–Organic Frameworks: Effect of Ring Size on Rotational Dynamics
作者:V. Nicholas Vukotic、Christopher A. O’Keefe、Kelong Zhu、Kristopher J. Harris、Christine To、Robert W. Schurko、Stephen J. Loeb
DOI:10.1021/jacs.5b04674
日期:2015.8.5
A series of metal-organicframework (MOF) materials has been prepared, each containing a mechanicallyinterlocked molecule (MIM) as the linker and a copper(II) paddlewheel as the secondary building unit (SBU). The MIM linkers are [2]rotaxanes with varying sizes of crown ether macrocycles ([22]crown-6, 22C6; [24]crown-6, 24C6; [26]crown-6, 26C6; benzo[24]crown-6, B24C6) and an anilinium-based axle containing