Photo-stimuli-responsive Organic Room-Temperature Phosphorescent Materials

Abstract

Purely organic room-temperature phosphorescent (RTP) materials have drawn increasing interest because of their long lifetime, persistent luminescence, and promising applications in bioimaging, anticounterfeiting, organic light-emitting diodes, and so forth. Various efficient design strategies have been proposed, which significantly promoted the understanding of the organic RTP materials. Recently, the research topic related to organic RTP materials is not merely limited to the development of brighter RTP materials with longer lifetimes; researchers have also been dedicated to developing more attractive organic RTP materials with stimuli-responsive properties, especially photostimulus, due to their tunable RTP properties and potential in producing intelligent materials. However, reported cases regarding photo-stimuli-responsive organic RTP materials are still scarce and lack systematic review. This review summarizes recent advances of photo-stimuli-responsive organic RTP materials in solution, crystalline, and amorphous states, with discussion of their phototunable RTP behaviors, internal design mechanism, and promising applications. It is expected to provide helpful guidance for the future development of photo-stimuli-responsive organic RTP materials.

Dynamic B/N Lewis Pairs: Insights into the Structural Variations and Photochromism via Light‐Induced Fluorescence to Phosphorescence Switching

“…Nevertheless, this UV-triggered emission change not only provides a facile approach to RTP materials (see Figure S117 for recent examples of boron-containing RTP materials) using more readily available fluorescent molecules, but the remarkable afterglow emission also promises potential applications in areas of smart sensing, information security and anti-counterfeiting. [29]…”

Dynamic B/N Lewis Pairs: Insights into the Structural Variations and Photochromism via Light‐Induced Fluorescence to Phosphorescence Switching

“…It is to be noted that the X‐ray structures of crystals of M1BNM and rad ‐ M1BNM are nearly identical, therefore the mechanism for the turn‐on of phosphorescent emission remains to be identified. Nevertheless, this UV‐triggered emission change not only provides a facile approach to RTP materials (see Figure S117 for recent examples of boron‐containing RTP materials) using more readily available fluorescent molecules, but the remarkable afterglow emission also promises potential applications in areas of smart sensing, information security and anti‐counterfeiting [29] …”

Recent advances in room temperature phosphorescence materials: design strategies, internal mechanisms and intelligent optical applications

“…Because of spin multiplicity, they can not only emit fluorescence by the electronic transition of a singlet state, but they can also emit organic phosphorescence derived from the electronic transition of the triplet excited state. 8 Because the process by which electrons jump from the S 0 to T 1 state is spin forbidden for organic components, phosphorescent luminescent materials with the high efficiency and long lifetimes of phosphorescence are rarely developed compared with fluorescent luminescent materials. 9 Therefore, developing novel phosphorescent materials with high phosphorescence performances as ILMs has become a significant challenge.…”