Rare earth supermolecular gel fluorescent material and preparation method thereof

Abstract

The invention discloses a rare earth supermolecular metal gel based on a fluorene-substituted phenylalanine gelator, and belongs to the field of functional materials. In the invention, the fluorene-substituted phenylalanine is dissolved in organic solvent and is coordinated with rare earth ions, so that under the pi-pi interaction and hydrogen bond interaction of the fluorene-substituted amino acid, the rare earth supermolecular gel is self-assembled; the gel has the specific fluorescent characteristic of the rare earth and is high in luminescent intensity and fluorescent efficiency; the rareearth supermolecular gel has excellent heat resistance, and can hold the gel state and maintain the fluorescent intensity even at 30-100 DEG C. The fluorescent intensity has excellent reversible responsibility to acid and alkali and can be maintained even after multiple-time circulation. The preparation method of the rare earth supermolecular gel is simple and quick and is free of heating treatment, wherein the gelator is easy to obtain and biocompatibility is excellent. The invention extends the application of the rare earth supermolecular gel in the fields such as high-end anti-fake, sensors, and biomedical treatment, etc.

Description

technical field [0001] The invention belongs to the field of functional materials, and more specifically relates to a rare earth supramolecular gel fluorescent material based on fluorenated phenylalanine and a preparation method thereof. Background technique [0002] my country is the largest producer of rare earth resources in the world, but nearly 50% of them are exported as primary raw materials. Due to their unique electronic layer structure, rare earth elements have unique optical, electrical and magnetic properties, among which the luminescent property is the most prominent. Usually most trivalent rare earth ions have very small molar extinction coefficients and poor light-absorbing ability, so their own luminous intensity is very weak. When organic ligands are coordinated with rare earth ions, their fluorescence intensity can be enhanced, which is the "antenna" effect. At present, there are many studies on the use of Schiff base or β-diketone as organic ligands to s...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a fluorenated phenylalanine-based rare earth supramolecular gel fluorescent material with acid-base responsiveness and thermal stability and a preparation method thereof, the purpose of which is to By using fluorenated phenylalanine as a gelling factor, under alkaline conditions, using the coordination of the gelling factor and rare earth ions, the π-π stacking effect of fluorenated phenylalanine and the fluorenated phenylalanine The rare earth supramolecular gel fluorescent material self-assembled by the intermolecular hydrogen bond of the acid forms the rare earth supramolecular gel fluorescent material, thereby solving the problem of complex preparation of the existing rare earth supramolecular gel, no acid-base responsiveness and Technical issues with heat resistance

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