Hyperbranched polyester rare earth complex containing nitrogen heterocyclic terminal group, and preparation method and use thereof

Abstract

The invention discloses a hyperbranched polyester rare earth complex containing a nitrogen heterocyclic terminal group, and a preparation method and a use thereof, wherein the hyperbranched polyester rare earth complex containing the nitrogen heterocyclic terminal group has the structural formula represented by the formula (I). The preparation method comprises the following steps: (1) hydroxyl-terminated hyperbranched polyester is modified by a modifier, the nitrogen heterocyclic terminal group is connected on a terminal hydroxyl, and thus hyperbranched polyester containing the nitrogen heterocyclic terminal group is obtained; and (2) the hyperbranched polyester containing the nitrogen heterocyclic terminal group, a second ligand and a rare earth soluble salt are dissolved in an organic solvent and undergo a reaction, and after the completion of the reaction, the hyperbranched polyester rare earth complex containing the nitrogen heterocyclic terminal group is obtained by separating from the reaction solution. With utilization of a coordination reaction of nitrogen atoms of the nitrogen heterocyclic group of the hyperbranched polyester with rare earth ions, the hyperbranched polyester rare earth complex containing the nitrogen heterocyclic terminal group is prepared; the rare earth complex is simple in synthesis method, is easy to process and mold, high in luminescent intensity and long in fluorescent lifetime, and can be used in the fields of display materials or luminous paints and the like.

Description

technical field [0001] The invention relates to a complex, in particular to a hyperbranched polyester rare earth complex containing a nitrogen-containing heterocyclic end group, a preparation method and application thereof. Background technique [0002] Bipyridine, 1,10-phenanthroline, terpyridine and their derivatives are a class of compounds with a heterocyclic conjugated structure, and the electron cloud density near the N atom that can coordinate with rare earth ions in the molecular structure is relatively high. High, it is beneficial to the effective energy transfer between rare earth ions, and at the same time, the co-coordination of N atoms and rare earth ions can form a stable five-membered ring structure, and rare earth complexes with strong fluorescence can be obtained. Therefore, this type of heterocycle Compounds have been widely used as organic ligands of rare earth ions. [0003] However, the small-molecule rare earth complexes prepared with the above-mention...

AI Technical Summary

Problems solved by technology

However, the preparation route of this method is generally long, and the rare earth complexes with polymerization activity are generally vinyl monomers, and the types and range of monomers that can be selected are relatively narrow.

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