Pure organic room-temperature phosphorescent material with multi-stimuli response characteristic, screening method and application

Abstract

The invention discloses a pure organic room-temperature phosphorescent material with multi-stimuli response characteristic, a screening method and application. The pure organic room-temperature phosphorescent material comprises donor molecules and acceptor molecules, wherein the acceptors and the donors are screened according to conditions required by fluorescence resonance energy transfer (FRET),and the molecules are all solids in a room-temperature environment. An organic room-temperature phosphorescent material with stimuli response characteristic is obtained by physically mixing the donormolecules and two types of acceptor molecules, a donor material and an acceptor material are selected without crystal culturing or eutectic engineering and also without rigid matrix doping, fluorescence resonance energy transfer can occur in the obtained donor-acceptor material through stimulation of heat or force, and high-performance room-temperature phosphorescence is finally generated. Energytransfer is initially applied to the design of the pure organic room-temperature phosphorescent material with stimuli response, an important step forward practicability of such materials is marked, and long-term practical prospects of the pure organic room-temperature phosphorescent material are truly turned into practical technologies.

Description

technical field [0001] The invention relates to the field of room temperature phosphorescent (RTP) materials, in particular to a pure organic room temperature phosphorescent material with multiple stimulus response characteristics, a screening method and an application. Background technique [0002] Luminescent materials that are sensitive to external stimuli such as force, heat, and light have been a research hotspot due to their great potential in applications such as information storage, anti-counterfeiting, and optoelectronic devices. At present, most stimuli-responsive luminescent materials are based on fluorescence, and the change of fluorescence color and / or intensity of these materials can be recognized by visual inspection after receiving stimulation, while few based on phosphorescence. From the perspective of luminescence mechanism, fluorescence comes from singlet exciton radiation attenuation, and its lifetime is short (nanosecond (ns) level). In the fields of bio...

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Problems solved by technology

This difficulty mainly comes from two aspects: one is that the RTP emission of pure organic materials mostly depends on crystal stacking, which limits its application scenarios; on the other hand, there is a lack of effective material design strategies

Some materials, such as amorphous polymer molecules reported by Wei Huang et al., can achieve RTP emission at room temperature, but the luminescence is weak and has no stimulus response properties (Angew.Chem.Int.Ed.2019, 58, 1–7; Nat .Commun.2019, 4247)

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