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pH‐Controlled Multiple Interconversion between Cucurbit[7]uril‐Based Molecular Shuttle, [3]Pseudorotaxane and [2]Pseudorotaxane
Author(s) -
Shi Hao,
Zhang Kun,
Lin RuiLian,
Sun WenQi,
Chu XiangFeng,
Liu XinHua,
Liu JingXin
Publication year - 2019
Publication title -
asian journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.846
H-Index - 44
eISSN - 2193-5815
pISSN - 2193-5807
DOI - 10.1002/ajoc.201800708
Subject(s) - chemistry , viologen , molecule , stereochemistry , crystallography , polymer chemistry , photochemistry , organic chemistry
An axle molecule 1 2+ containing one viologen nucleus and two identical p ‐toluic acid sides was synthesized. The sequential binding of the Q[7] wheels to the 1 2+ axle leads to the formation of a molecular shuttle and then a homowheel, [3]pseudorotaxane. The [3]pseudorotaxane can reversibly transform to [2]pseudorotaxane by acid‐base control. On the other hand, the initially formed molecular shuttle can also transform to [2]pseudorotaxane directly and reversibly under pH control. As a whole, a molecular shuttle and [3]/[2]pseudorotaxanes constructed a pH‐controlled multiple interconvertible system.