Polyrotaxane-shaped two-dimensional supermolecule nano-assembly system driven by photoreaction and preparation method and application of system

Abstract

The invention discloses a polyrotaxane-shaped two-dimensional supermolecule nano-assembly system driven by a photoreaction and a preparation method and application of the system, and belongs to the field of periodic supermolecule nano-assembly systems. The construction unit of the assembly system takes curcubit[8]uril as a host and takes a triphenylamine derivative as a guest. Firstly, triphenylamine modified by alkenyl pyridinium and the curcubit[8]uril form a two-dimensional periodic polyrotaxane-shaped supermolecule assembly system through self-assembly under the host-guest mutual effect; under the visible light irradiation condition, the alkenyl structure in guest molecules can be subjected to a photodimerization reaction, so that the original polyrotaxane-shaped supermolecule assemblysystem is converted into the more stable two-dimensional periodic polyrotaxane-shaped supermolecule assembly system; due to the fact that the obtained polyrotaxane-shaped supermolecule assembly system has good stability and water solubility, the polyrotaxane-shaped supermolecule assembly system can serve as a trapping agent of fullerene (C60), the functional supermolecule composite system is further constructed, a good effect is achieved in the aspect of photodynamics therapy, and the polyrotaxane-shaped two-dimensional supermolecule nano-assembly system has a wide application prospect in theaspect of biological medicine.

Description

technical field [0001] The invention belongs to the field of periodic supramolecular nano assembly, in particular to a photoreaction-driven polyrotaxane-like two-dimensional supramolecular nano assembly system. Background technique [0002] Two-dimensional materials, due to their good dispersion, large specific surface area, and abundant accessible active sites, have attracted extensive attention in the fields of materials chemistry, nanoscience, biopharmaceuticals, and supramolecular chemistry. Especially in recent years, functional two-dimensional materials have been widely used in sewage treatment, gas separation, drug delivery and supramolecular diagnosis and treatment. At present, the strategy of using small organic molecules as assembly units to achieve self-assembly through various non-covalent forces, such as hydrogen bonding, π-π stacking, metal coordination, and dynamic covalent bonds, to construct two-dimensional materials is widely used. use. See: (1) Mali, K.S...

AI Technical Summary

Problems solved by technology

Such a structure itself is not stable and is easily affected by the external environment, such as high temperature or the presence of competing molecules, its structure cannot be effectively maintained, which limits the further development and application of this type of two-dimensional materials to a certain extent.

Therefore, it is still a challenge to realize the construction of stable supramolecular two-dimensional materials by utilizing the host-guest interaction of macrocyclic compounds.

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