Citation: Yun Lu, Zhichao Yu, Xinan Yang, Jingjing Dai, Peihui Shan, Xianhao Feng, Zhu Tao, Carl Redshaw, Xin Xiao. Supramolecular assemblies of cucurbit[n]urils and 4-aminopyridine controlled by cucurbit[n]uril size (n = 5, 6, 7 and 8)[J]. Chinese Chemical Letters, ;2023, 34(7): 108040. doi: 10.1016/j.cclet.2022.108040 shu

Supramolecular assemblies of cucurbit[n]urils and 4-aminopyridine controlled by cucurbit[n]uril size (n = 5, 6, 7 and 8)

Yun Lu ^{a, 1} ,
Zhichao Yu ^{a, 1} ,
Xinan Yang ^a ,
Jingjing Dai ^a ,
Peihui Shan ^a ,
Xianhao Feng ^a ,
Zhu Tao ^a ,
Carl Redshaw ^b ,
Xin Xiao ^{a, *,}

a.
Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang 550025, China
b.
Department of Chemistry, University of Hull, Hull HU6 7RX, United Kingdom

gyhxxiaoxin@163.com

Received Date: 28 August 2022
Revised Date: 1 December 2022
Accepted Date: 1 December 2022
Available Online: 5 December 2022

Figures(8)

The binding interactions between 4-aminopyridine (4-AP) and a series of cucurbit[n]urils (Q[5], Q[6], TMeQ[6], Q[7], Q[8]) have been studied using ¹H NMR spectroscopy, UV–vis absorption spectroscopy, isothermal titration calorimetry (ITC) and X-ray crystallography. The data indicates that the Q[5]@4-AP complex exhibits exo binding, which is not observed in the other four host-guest complexes. Furthermore, X-ray crystallography clearly reveals how the Q[n]s bind with 4-AP to form complexes, for example Q[5] forms an outer-surface complex, whilst Q[6], TMeQ[6] and Q[7] formed 1:1 host and guest type complexes, and Q[8] formed a stable 1:2 ternary complex due to its large cavity, which can accommodate two 4-AP molecules.
- Cucurbit[n]urils,
- 4-Aminopyridine,
- Host-guest chemistry,
- Supramolecular assembly,
- Exo binding
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