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Assembling Molecular Shuttles Powered by Reversibly Attached Kinesins

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Published on: January 26, 2019

Light-Driven Reversible Multicolor Supramolecular Shuttle.

Rong Zhang¹, Yong Chen¹, Yu Liu^1,2,3

¹College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China.

Angewandte Chemie (International Ed. in English)

|November 16, 2023

Summary

This summary is machine-generated.

Visible light triggers a reversible multicolor supramolecular shuttle using spiropyran-cyanostilbene and cucurbit[8]uril. This system exhibits dynamic color changes and morphological transformations, enabling applications in information encryption.

Keywords:

Information Encryption Multicolor Luminescence Photo-Responsiveness Supramolecular System

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Area of Science:

Supramolecular Chemistry
Photochemistry
Materials Science

Background:

Multicolor supramolecular systems often rely on doping or unidirectional photo-reactions.
Controlling luminescence reversibly with light is a key challenge in supramolecular chemistry.

Purpose of the Study:

To develop a light-driven, bidirectional, reversible multicolor supramolecular shuttle.
To investigate the photo-isomerization of spiropyran-cyanostilbene within a cucurbit[8]uril host.

Main Methods:

Encapsulation of spiropyran-modified cyanostilbene (BCNMC) by macrocyclic cucurbit[8]uril (CB[8]).
Irradiation with visible light to induce and reverse photo-isomerization and morphological changes.
Characterization of fluorescence properties and topological morphology transformations.

Main Results:

The BCNMC-CB[8] complex exhibited a reversible multicolor fluorescence shuttle from blue to orange in the dark (2 hours) and reverted upon visible light (30 seconds).
Visible light also induced reversible conversion of the complex's morphology from 2D nanoplatelets to nanospheres.
The system demonstrated successful application in programmed and rewritable information encryption.

Conclusions:

The study presents a novel spiropyran supramolecular shuttle with light-controlled multicolor luminescence and reversible morphological changes.
This system offers a unique alternative to rotaxane shuttles, showcasing advanced functionalities for smart materials.
The reversible nature and tunable properties make it promising for advanced optical and encryption applications.