Article

High Performance of Simple Organic Phosphorescence Host–Guest Materials and their Application in Time‐Resolved Bioimaging

Yunsheng WangInstitute of Molecular Aggregation Science Tianjin University Tianjin 300072 ChinaHeqi GaoCollaborative Innovation Center of Chemical Science and Engineering Nankai University Tianjin 300071 ChinaJie YangInstitute of Molecular Aggregation Science Tianjin University Tianjin 300072 ChinaManman FangInstitute of Molecular Aggregation Science Tianjin University Tianjin 300072 ChinaDan DingCollaborative Innovation Center of Chemical Science and Engineering Nankai University Tianjin 300071 ChinaBen Zhong TangDepartment of Chemistry The Hong Kong University of Science & Technology Clear Water Bay Kowloon 999077 Hong KongZhen LiDepartment of Chemistry Wuhan University Wuhan 430072 China

2021en

ABI

Abstract

Abstract The study of purely organic room‐temperature phosphorescence (RTP) has drawn increasing attention because of its considerable theoretical research and practical application value. Currently, organic RTP materials with both high efficiency (Φ P > 20%) and a long lifetime (τ P > 10 s) in air are still scarce due to the lack of related design guidance. Here, a new strategy to increase the phosphorescence performance of organic materials by integrating the RTP host and RTP guest in one doping system to form a triplet exciplex, is reported. With these materials, the high‐contrast labeling of tumors in living mice and encrypted patterns in thermal printing are both successfully realized by taking advantage of both the long afterglow time (up to 25 min in aqueous media) and high phosphorescence efficiency (43%).

Identifiers

DOI: 10.1002/adma.202007811

Citations and references

Cited by 20 references

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