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Hydrogen‐Bonded Organic Aromatic Frameworks for Ultralong Phosphorescence by Intralayer π–π Interactions
Author(s) -
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
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201800697
Subject(s) - phosphorescence , quenching (fluorescence) , materials science , luminescence , photochemistry , thermal stability , porosity , porous medium , hydrogen , metal organic framework , nanotechnology , chemistry , fluorescence , organic chemistry , optoelectronics , composite material , physics , adsorption , quantum mechanics
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 N 2 , 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.