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Organic room temperature phosphorescence (RTP) materials have drawn increasing attention due to their unique features, especially the long emission lifetime for applications in biomedicine. In this review, we provide an overview of the recent developments of organic RTP materials applied in the biomedicine field. First, we introduce the basic mechanism of phosphorescence and subsequently we present various strategies of modulating the lifetime and efficiency of room temperature organic phosphorescence. Next, we summarize the progress of organic RTP materials in biological applications, including bioimaging, anti-cancer and antibacterial therapies. Finally, we provide an outlook with regard to the challenges and future perspectives in the field., (© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Dynamic room temperature phosphorescence (RTP) materials have potential applications in optoelectronics, which inevitably suffer from poor processability, flexibility or stretchability. Herein, we report a concise strategy to develop supercooled liquids (SCLs) with dynamic RTP behavior using terminal hydroxyl engineering. The terminal hydroxyls effectively hinder the nucleation process of molecules for the formation of stable SCLs after thermal annealing. Impressively, the SCLs show reversible RTP emission via alternant stimulation by UV light and heat. Photoactivated SCLs have phosphorescent efficiency of 8.50 % and a lifetime of 31.54 ms under ambient conditions. Regarding the dynamic RTP behavior and stretchability of SCLs, we demonstrate the applications in erasable data encryption and patterns on flexible substrates. This finding provides a design principle for obtaining SCLs with RTP and expands the potential applications of RTP materials in flexible optoelectronics. [ABSTRACT FROM AUTHOR]

Organic phosphorescent materials have attracted wide attention in recent years owing to their opportunities in various functional applications. Through appropriate molecular design strategies and synthetic perspectives to modulate their weak spin–orbit coupling, highly active triplet excitons, and ultrafast deactivation, the organic phosphors can be endowed with long‐lived room temperature phosphorescence (RTP) characteristics. Organic cocrystals constructed by noncovalent intermolecular interactions (hydrogen and halogen bonding, π–π stacking and so on) are provoking wide interest due to their unexpected and multifaceted phosphorescence properties and their applications. In this review, research on organic cocrystals with RTP based on their interactions is described, revealing their structure–property relationships. Furthermore, current accomplishments, restrictions, and viewpoints along with some guidance for their further study are discussed. [ABSTRACT FROM AUTHOR]

Organic room temperature phosphorescence (RTP) materials have drawn increasing attention due to their unique features, especially the long emission lifetime for applications in biomedicine. In this review, we provide an overview of the recent developments of organic RTP materials applied in the biomedicine field. First, we introduce the basic mechanism of phosphorescence and subsequently we present various strategies of modulating the lifetime and efficiency of room temperature organic phosphorescence. Next, we summarize the progress of organic RTP materials in biological applications, including bioimaging, anti‐cancer and antibacterial therapies. Finally, we provide an outlook with regard to the challenges and future perspectives in the field. [ABSTRACT FROM AUTHOR]