9, 9‐Dimethylxanthene Derivatives with Room‐Temperature Phosphorescence: Substituent Effects and Emissive Properties. (4th February 2020)

• Record Type: Journal Article
• Authors: Liao, Qiuyan; Gao, Qihe; Wang, Jiaqiang; Gong, Yanbing; Peng, Qian; Tian, Yu; Fan, Yuanyuan; Guo, Haojie; Ding, Dan; Li, Qianqian; Li, Zhen
• Is Part Of: Angewandte Chemie. Volume 132:Number 25(2020)
• Page Start: 10032
• Page End: 10037
• Publication Date: 2020-02-04
• Subjects: Heterocyclen -- Molekülkonfiguration -- Nichtkovalente Wechselwirkungen -- Phosphoreszenz -- Substituenteneffekte; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201916057
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Room‐temperature phosphorescence (RTP) emitters with ultralong lifetimes are emerging as attractive targets because of their potential applications in bioimaging, security, and other areas. But their development is limited by ambiguous mechanisms and poor understanding of the correlation of the molecular structure and RTP properties. Herein, different substituents on the 9, 9‐dimethylxanthene core (XCO) result in compounds with RTP lifetimes ranging from 52 to 601 ms, which are tunable by intermolecular interactions and molecular configurations. XCO‐PiCl shows the most persistent RTP because of its reduced steric bulk and multiple sites of the 1‐chloro‐2‐methylpropan‐2‐yl (PiCl) moiety for forming intermolecular interactions in the aggregated state. The substituent effects reported provide an efficient molecular design of organic RTP materials and establishes relationships among molecular structures, intermolecular interactions, and RTP properties. Abstract : Substituenteneffekte werden genutzt, um in 9, 9‐Dimethylxanthen‐Derivaten intermolekulare Wechselwirkungen zu modulieren und die Lebensdauer der Raumtemperatur‐Phosphoreszenz (RTP) auf 52 bis 601 ms zu erhöhen. Dieses molekulare Design persistenter RTP‐Materialien ermöglicht ein tiefes Verständnis der Beziehung zwischen molekularen Strukturen, intermolekularen Wechselwirkungen und RTP‐Eigenschaften.