Tunable Fluorescence and Morphology of Aggregates Built from a Mechanically Bonded Amphiphilic Bistable [2]Rotaxane

Author:

Shi Jun‐Tao1,Chen Xian‐Hui1,Peng Yuan‐Yuan2,Wang Gui‐Ping2,Du Guang‐Yan1ORCID,Li Quan34ORCID

Affiliation:

1. College of Materials Science and Engineering Zhejiang University of Technology Hangzhou 310014 P. R. China

2. College of Chemistry and Chemical Engineering Southwest Petroleum University Chengdu 610500 P. R. China

3. School of Chinese Materia Medica Tianjin University of Traditional Chinese Medicine Tianjin 301617 P. R. China

4. Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules College of Chemistry and Chemical Engineering Hubei University Wuhan 430062 P. R. China

Abstract

AbstractAdvanced Organic Chemical Materials Co‐constructed Mechanically bonded amphiphiles (MBAs), also known as mechanically interlocked molecules (MIMs), have emerged as an important kind of functional building block for the construction of artificial molecular machines and soft materials. Herein, a novel MBA, i. e., bistable [2]rotaxane H2 was designed and synthesized. In the solution state, H2 demonstrated pH and metal ion‐responsive emissions due to the presence of a distance‐dependent photoinduced electron transfer (PET) process and the fluorescence resonance energy transfer (FRET) process, respectively. Importantly, the amphiphilic feature of H2 has endowed it with unique self‐assembly capability, and nanospheres were obtained in a mixed H2O/CH3CN solvent. Moreover, the morphology of H2 aggregates can be tuned from nanospheres to vesicles due to the pH‐controlled shuttling motion‐induced alternation of H2 amphiphilicity. Interestingly, larger spheres with novel pearl‐chain‐like structures from H2 were observed after adding stoichiometric Zn2+. In particular, H2 shows pH‐responsive emissions in its aggregation state, allowing the visualization of the shuttling movement by just naked eyes. It is assumed that the well‐designed [2]rotaxane, and particularly the proposed concept of MBA shown here, will further enrich the families of MIMs, offering prospects for synthesizing more MIMs with novel assembly capabilities and bottom‐up building dynamic smart materials with unprecedented functions.

Funder

National Natural Science Foundation of China

Technology Foundation for Selected Overseas Scholar, Ministry of Human Resources and Social Security

Publisher

Wiley

Subject

General Chemistry,Catalysis,Organic Chemistry

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Synthesis of ‘Impossible’ Rotaxanes;Chemistry – A European Journal;2024-01-17

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