Multi-State Redox and Light-Driven Switching of Pseudorotaxanation and Cation Shuttling.

50 − 54 This, in turn, is expected to be highly significant for the construction of multistimuli-responsive molecular machines, sensing, and systems chemistry. 37 , 39 , 55 , 56 Here, we address this challenge in the proof-of-principle design of a family of multistate redox- and light-responsive crown ether cation receptors using the bisthioxanthylidene (BTX) overcrowded alkene switch scaffold ( Figure 1 A). 57 − 61 Building on our earlier studies, and as shown in Figure 1 B, the parent BTX unit can act as a highly versatile multistate conformational switch.

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