A rare earth supramolecular gel luminescent material, its preparation and application

Abstract

The invention belongs to the field of functional rare earth fluorescent materials, and particularly relates to a rare earth supramolecular gel luminescent material as well as preparation and application thereof. An organic ligand and rare earth ions are combined and self-assembled to form the rare earth supramolecular gel luminescent material by using pi-pi interaction and hydrogen bonding of theorganic ligand molecule and coordination of the organic ligand with rare earth ions in a rare earth salt under heating conditions, wherein 5,5',5''-(1,3,5-triazin-2,4,6-triimino)-triisophthalic acid is used as the organic ligand. The formed gel has rare earth special light emission, good fluorescence monochromaticity and a high quantum yield; the rare earth supramolecular gel provided by the invention can still maintain stable light emission under heating or refrigeration (0-90 DEG C), mechanical force or water molecule stimulation; and the rare earth supramolecular gel provided by the invention can simply, quickly and accurately detect sialic acid in an aqueous phase, and has the advantages of good selectivity, high sensitivity, and low detection limit.

Description

technical field [0001] The invention belongs to the field of functional rare-earth fluorescent materials, and specifically relates to a rare-earth supramolecular gel luminescent material, its preparation and application, and more specifically relates to an organic ligand-based 5,5',5"-(1,3 , 5-triazine-2,4,6-triimino)-triisophthalic acid rare earth supramolecular metal gel luminescent material with luminescence stability, preparation method and application. Background technique [0002] Rare earth fluorescent materials have important applications in lighting, sensing, imaging, fluorescent marking, anti-counterfeiting and other fields due to their excellent optical properties such as narrow emission peak, good fluorescence monochromaticity, large Stokes shift, and long fluorescence lifetime. Since the luminous intensity of rare earth fluorescent materials is easily affected by heat, water molecules, and mechanical forces, their luminous stability is insufficient, which limits...

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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 rare earth supramolecular gel luminescent material with luminescence stability, its preparation and application, which is obtained by using 5,5',5"-(1,3 , 5-triazine-2,4,6-triimino)-three isophthalic acid (abbreviated as H in the present invention 6 L) is an organic ligand, under heating conditions, utilizing the π-π interaction of the organic ligand molecule, hydrogen bonding and its coordination with the rare earth ion in the rare earth salt, the organic ligand combines with the rare earth ion and automatically Assembled to form a rare earth supramolecular gel luminescent material, the rare earth supramolecular gel can maintain stable light emission properties under heating or cold storage (0-90°C), mechanical force, and water molecule stimulation, thereby solving the problem of rare earth Technical problems such as poor luminescence stability of luminescent materials or cumbersome and complicated process of improving stability

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