A kind of hyperbranched polysiloxane fluorescent material and preparation method

Abstract

The invention relates to a hyperbranched polysiloxane fluorescent material and a preparation method. Hyperbranched polysiloxane with a great deal of carbonyl in the structure is synthesized from a binary acid and a silane monomer in a mole ratio of 2 to 1-4 through a nucleophilic substitution polycondensation reaction. Within the mole ratio of 2 to 1-4, the mole ratio of the binary acid to the silane monomer is regulated and controlled, and then carboxyl sealed or silane sealed hyperbranched polysiloxane is synthesized; by adopting the method, a series of hyperbranched polysiloxane with a great deal of carbonyl in structures can be synthesized, and due to the adoption of the carbonyl, the accumulation of the hyperbranched polysiloxane can be promoted, the hyperbranched polysiloxane can beenabled to emit bright fluorescence light and has a high quantum yield. Therefore, the hyperbranched polysiloxane has the characteristics of being simple in synthesis process, easy in raw material obtaining, good in biodegradability, high in quantum yield, wide in application, and the like, and can be applied to fields such as ionic detection, cell imaging, medicine carrying, and the like.

Description

technical field [0001] The invention belongs to the field of polymer luminescent materials, and relates to a hyperbranched polysiloxane fluorescent material and a preparation method. Background technique [0002] Hyperbranched polysiloxane has the advantages of low viscosity, high temperature resistance, and functionalization, which has attracted extensive attention of researchers. At present, the traditional methods for synthesizing hyperbranched polysiloxane mainly include hydrosilylation and polycondensation, but these two methods have some obvious defects. For example, the process is complicated, expensive catalysts are needed, and the hydrolysis of siloxane is easy to cause gel, etc. These defects limit its industrial application. Therefore, it is necessary to find a simple, catalyst-free synthetic method to prepare hyperbranched polysiloxanes. Niu et al [Macromol. Rapid communication, 2016, 37: 136-142; Polym. Chem. 2016, 7: 3747-3755]. Using different types of diol...

AI Technical Summary

Problems solved by technology

Using different types of diols or triols and different types of silane monomers as raw materials, hyperbranched polysiloxanes with different functional groups at the end were prepared by the one-pot method of A2+B3, and the synthesized polysiloxanes Under the irradiation of ultraviolet light, it emits bright blue fluorescence. Although this method is relatively simple, it has the disadvantages of weak fluorescence intensity and low quantum yield.

Images