Polypseudorotaxanes Constructed by
Crown Ethers
2
Hong-Guang Fu, Yong Chen, and Yu Liu
Contents
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.2 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
2.1
Introduction
In 1967 Pederson reported dibenzo-18-crown-6 as a molecular host for cationic
guests, which opened the gate of supramolecular chemistry [1]. Crown ether, a
traditional macrocyclic host, is composed of oxygen atoms linked by alkyl chains
and plays a vital role in supramolecular chemistry. A unique structure makes them
have a strong binding with secondary ammonium and leads them to be appealing
building blocks in fabricating intriguing assemblies. Supramolecular devices including pseudorotaxane constructed by crown ether were very fascinated as it embedded
multistimuli-responsive features (thermo-, pH-, and chemo-) [2]. Much attention
has been given to the design and synthesis of macrocyclic molecules in science.
These molecules could form mechanically interlocked molecules (MIMs) such as
pseudorotaxanes [3], rotaxanes [4], catenanes [5], and cryptands [6] with appropriate
guest, which acts as a potential candidate for molecular devices, molecular
switches, and machines. In the past decades, various template strategies have been
developed to construct topologically intriguing supermolecules. The topology or
shape of a polymer is one of the most essential factors on determining its property.
H.-G. Fu · Y. Chen · Y. Liu (*)
College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University,
Tianjin, China
Collaborative Innovation Center of Chemical Science and Engineering (Tianjin),
Tianjin, China
e-mail: 406411068@qq.com; chenyong@nankai.edu.cn; yuliu@nankai.edu.cn
© Springer Nature Singapore Pte Ltd. 2020
Y. Liu et al. (eds.), Handbook of Macrocyclic Supramolecular Assembly,
https://doi.org/10.1007/978-981-15-2686-2_3
27
Crown Ethers
2
Hong-Guang Fu, Yong Chen, and Yu Liu
Contents
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.2 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
2.1
Introduction
In 1967 Pederson reported dibenzo-18-crown-6 as a molecular host for cationic
guests, which opened the gate of supramolecular chemistry [1]. Crown ether, a
traditional macrocyclic host, is composed of oxygen atoms linked by alkyl chains
and plays a vital role in supramolecular chemistry. A unique structure makes them
have a strong binding with secondary ammonium and leads them to be appealing
building blocks in fabricating intriguing assemblies. Supramolecular devices including pseudorotaxane constructed by crown ether were very fascinated as it embedded
multistimuli-responsive features (thermo-, pH-, and chemo-) [2]. Much attention
has been given to the design and synthesis of macrocyclic molecules in science.
These molecules could form mechanically interlocked molecules (MIMs) such as
pseudorotaxanes [3], rotaxanes [4], catenanes [5], and cryptands [6] with appropriate
guest, which acts as a potential candidate for molecular devices, molecular
switches, and machines. In the past decades, various template strategies have been
developed to construct topologically intriguing supermolecules. The topology or
shape of a polymer is one of the most essential factors on determining its property.
H.-G. Fu · Y. Chen · Y. Liu (*)
College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University,
Tianjin, China
Collaborative Innovation Center of Chemical Science and Engineering (Tianjin),
Tianjin, China
e-mail: 406411068@qq.com; chenyong@nankai.edu.cn; yuliu@nankai.edu.cn
© Springer Nature Singapore Pte Ltd. 2020
Y. Liu et al. (eds.), Handbook of Macrocyclic Supramolecular Assembly,
https://doi.org/10.1007/978-981-15-2686-2_3
27