Fluorescent color changing eutectic material under ultrahigh pressure conditions and preparation method thereof

Abstract

The invention discloses a fluorescent color changing eutectic material under ultra-high pressure conditions and a preparation method thereof, and belongs to the field of molecular solid-state light-emitting materials. A plurality of multi-fluoro-substituted organic small molecules are selected as co-assembly units, and a novel multi-component molecular co-crystal compound is prepared by using a solvent-assisted grinding method, a solvent evaporation method, an ultrasonic synthesis method and the like. Cyano substituted p-phenylene vinyl type molecules and the co-assembled small molecules mutually recognize each other through multiple hydrogen bonds, Pi- Pi force and other non-covalent forces to form a structure-ordered supramolecular structure, changing self-stacking molecular configuration and spatial arrangement of original cyano-substituted phenylene vinyl type molecules so as to achieve a certain modulation effect on photophysical properties. The novel fluorescent color changing eutectic material prepared by the method can produce different fluorescent discoloration behaviors under the ultra-high pressure conditions, is the first fluorescent discoloration eutectic system underthe ultra-high pressure conditions, and has application prospects in the fields of new optical sensors and pressure sensitive materials and the like.

Description

technical field [0001] The invention belongs to the technical field of molecular solid luminescent materials, in particular to a fluorescent color-changing eutectic material under ultra-high pressure conditions and a preparation method thereof. Background technique [0002] High-pressure chemistry refers to an interdisciplinary science that studies the composition, properties, structure and changes of substances under high-pressure environmental conditions. Under the extreme conditions of ultra-high pressure, the structure and properties of many well-known substances will undergo tremendous changes. For example, in 2013, Zhang Weiwei et al. reported that sodium chloride crystals have multiple crystal forms under high pressure conditions. The stoichiometric ratio of sodium ions and chloride ions in the crystals obtained through experiments is 1:3 or 3:1, which is not what people expected. The familiar 1:1 under normal pressure conditions. In-situ testing under high-pressure...

AI Technical Summary

Problems solved by technology

However, the luminescent properties of p-phenylene vinylene-type compounds not only depend on the properties of the single molecule itself, but also are usually affected by factors such as molecular configuration, molecular packing and arrangement, and aggregate particle size in its aggregates. Its solid-state fluorescent color will have a certain degree of unpredictability

Images