Stepped zinc aspartate coordination polymer as well as preparation method and application thereof

Abstract

The invention relates to a zinc coordination polymer and fluorescence sensing application, in particular to a stepped aspartic acid zinc coordination polymer and a preparation method and application thereof, the molecular formula of the zinc coordination polymer is [Zn (mu3-caa). H2O] n, caa3-is a form of removing three protons from N-(4-carboxyl benzyl)-L-aspartic acid, and n represents the degree of polymerization. The structure of the coordination polymer is as follows: adjacent metal zinc ions are connected by N-(4-carboxyl benzyl)-L-aspartic acid ligands in a deprotonation coordination mode to form a one-dimensional infinite ladder structure, and a three-dimensional network structure is formed between chains through hydrogen bonds and Pi... Pi accumulation. Fluorescence tests show that the complex can be used for rapidly detecting tetracycline and heavy metal trivalent terbium ions in an aqueous solution, has good anti-interference performance, low detection limit and good cyclic utilization performance, and is a promising dual-response fluorescent probe.

Description

technical field [0001] The invention relates to the application fields of zinc coordination polymers and fluorescent sensing, in particular to a ladder type zinc aspartate coordination polymer and its preparation method and application. Background technique [0002] In recent decades, with the frequent reports of antibiotic and heavy metal ion pollution incidents in various water systems (such as industrial water, rivers, lakes, and groundwater), people have realized that the indiscriminate discharge of antibiotics and heavy metal pollutants has seriously harmed human beings. health and ecosystems. Tetracycline, which is widely used to treat bacterial infections in animals and humans, is difficult to absorb and metabolize directly in the gastrointestinal tract of animals and humans, resulting in the residual tetracycline being excreted from the body in the form of compounds, which are further degraded by microorganisms, and in the environment The activity of tetracycline is...

AI Technical Summary

Problems solved by technology

Tetracycline, which is widely used to treat bacterial infections in animals and humans, is difficult to absorb and metabolize directly in the gastrointestinal tract of animals and humans, resulting in the residual tetracycline being excreted from the body in the form of compounds, which are further degraded by microorganisms, and in the environment Tetracyclines are less active and highly toxic, leading to the emergence of drug-resistant pathogens

In addition, excessively discharged lanthanide metal ions are brought into the ecological environment and accumulate in the human body through the food chain, especially excessive Tb3+ ions have irreversible damage to various organs of the human body; and The extinction coefficient in the ultraviolet region caused by Tb3+ ion transition is very small, resulting in very weak absorption of ultraviolet light, which is often difficult to be detected and identified

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