Excitation‐Dependent Long‐Life Luminescent Polymeric Systems under Ambient Conditions. (4th November 2019)

• Record Type: Journal Article
• Authors: Su, Yan; Zhang, Yongfeng; Wang, Zhonghao; Gao, Weichen; Jia, Peng; Zhang, Dan; Yang, Chaolong; Li, Youbing; Zhao, Yanli
• Is Part Of: Angewandte Chemie. Volume 132:Number 25(2020)
• Page Start: 10053
• Page End: 10057
• Publication Date: 2019-11-04
• Subjects: Aggregationsinduzierte Emission -- Fälschungssicherheit -- Dotierte Polymerfilme -- Langlebige Lumineszenz -- Selbstorganisation; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201912102
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Organic room temperature luminescent materials present a unique phosphorescence emission with a long lifetime. However, many of these materials only emit single blue or green color in spite of external stimulation, and their color tunability is limited. Herein, we report a rational design to extend the emission color range from blue to red by controlling the doping of simple pyrene derivatives into a robust polymer matrix. The integration of these pyrene molecules into the polymer films enhances the intersystem crossing pathway, decreases the first triplet level of the system, and ensures the films show a sensitive response to excitation energy, finally yielding excitation‐dependent long‐life luminescent polymeric systems under ambient conditions. These materials were used to construct anti‐counterfeiting patterns with multicolor interconversion, presenting a promising application potential in the field of information security. Abstract : Blau‐roter Glücksklee : Eine neuartige Strategie ermöglicht die Herstellung von anregungsabhängigen langlebig lumineszierenden Polymersystemen unter Umgebungsbedingungen durch Abstimmung des Aggregationszustandes von Phosphor in Polyvinylalkoholschichten. Die Polymere sind vielversprechend für die Mehrfarbenstrukturierung in Anwendungen zur Fälschungssicherung.