Crown ether-based rotaxane molecular machine and preparation method thereof

Abstract

The invention relates to the field of molecular machines, aims to overcome the defects that an existing molecular machine is unreasonable in structural design, the action effect among different structures in molecules is limited, the detection method is not visual and not accurate enough, and discloses a crown ether-based rotaxane molecular machine and a preparation method thereof. The acid-base property is detected according to the change of the fluorescence intensity of naphthalimide caused by the position difference of a crown ether structure on a chain molecule under acidic and alkaline conditions and the movement of the crown ether structure generated by the change of the acid-base property in a system. Besides, the terpyridyl structure of the molecular machine disclosed by the invention can also generate a coordination effect with metal ions, the inner filtering effect caused by the coordination effect can further quench the fluorescence of naphthalimide, and the metal ions can also be identified and detected according to different quenching capacities of different metal ions to the fluorescence.

Description

technical field [0001] The invention belongs to the technical field of molecular machines, and in particular relates to a crown ether-based rotaxane molecular machine and a preparation method. Background technique [0002] Inspired by the phenomenon that the protein molecules in the ATPase in the organism synthesize ATP through rotation, and the mutual movement between actin and myosin in muscle fibers realizes muscle contraction, chemists have synthesized various artificial molecular machines. Among them, mechanically interlocked molecules (MIMs) based on rotaxanes or catenanes have been one of the research hotspots in the past 20 years, and their potential application value has attracted widespread attention of scientists. Rotaxane is a typical mechanical interlocking structure composed of dumbbell-shaped shafts and ring-shaped molecules. Through external stimulation (regulation), the position of the cyclic component shuttling on the shaft can be changed, and due to the e...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the unreasonable structure design of existing molecular machines, the limited interaction effect between different structures in the molecule; the unintuitive and inaccurate detection method, and provide a more significant interaction effect between different structures in the molecule; relying on fluorescence A crown ether-based rotaxane molecular machine that can detect different metal ions by changing the pH;

Images