Hydrogen‐Bonded Organic Aromatic Frameworks for Ultralong Phosphorescence by Intralayer π–π Interactions. (7th March 2018)

• Record Type: Journal Article
• Authors: Cai, Suzhi; Shi, Huifang; Zhang, Zaiyong; Wang, Xuan; Ma, Huili; Gan, Nan; Wu, Qi; Cheng, Zhichao; Ling, Kun; Gu, Mingxing; Ma, Chaoqun; Gu, Long; An, Zhongfu; Huang, Wei
• Is Part Of: Angewandte Chemie. Volume 130:Number 15(2018)
• Page Start: 4069
• Page End: 4073
• Publication Date: 2018-03-07
• Subjects: Organische Gerüststrukturen -- π-Wechselwirkungen -- Selbstorganisation -- Ultralange organische Phosphoreszenz -- Wasserstoffbrücken; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201800697
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Ultralong organic phosphorescence (UOP) based on metal‐free porous materials is rarely reported owing to rapid nonradiative transition under ambient conditions. In this study, hydrogen‐bonded organic aromatic frameworks (HOAFs) with different pore sizes were constructed through strong intralayer π–π interactions to enable ultralong phosphorescence in metal‐free porous materials under ambient conditions for the first time. Impressively, yellow UOP with a lifetime of 79.8 ms observed for PhTCz‐1 lasted for several seconds upon ceasing the excitation. For PhTCz‐2 and PhTCz‐3, on account of oxygen‐dependent phosphorescence quenching, UOP could only be visualized in N2, thus demonstrating the potential of phosphorescent porous materials for oxygen sensing. This result not only outlines a principle for the design of new HOFs with high thermal stability, but also expands the scope of metal‐free luminescent materials with the property of UOP.