Multiple Luminescence Responses towards Mechanical Stimulus and Photo‐Induction: The Key Role of the Stuck Packing Mode and Tunable Intermolecular Interactions

• Published in: Chemistry : a European journal Vol. 25; no. 28; pp. 7031 - 7037
• Main Authors: Dang, Qianxi, Hu, Lanzhen, Wang, Jiaqiang, Zhang, Qunhua, Han, Mengmeng, Luo, Simeng, Gong, Yanbin, Wang, Can, Li, Qianqian, Li, Zhen
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 17.05.2019
• Subjects: Chemistry; Crystal structure; Functional materials; intermolecular interactions; Light effects; Luminescence; Mechanoluminescence; molecular packing; Optical properties; Phosphorescence; photo-induced room-temperature phosphorescence; intermolecular interactions; molecular packing; mechanoluminescence; photo-induced room-temperature phosphorescence
• ISSN: 0947-6539; 1521-3765
• DOI: 10.1002/chem.201901116

Organic luminescence with different forms continues to be one of the most active research fields in science and technology. Herein, an ultra‐simple organic molecule (TPA‐B), which exhibits both mechanoluminescence (ML) and photo‐induced room‐temperature phosphorescence (RTP) in the crystalline state, provides an opportunity to reveal the internal mechanism of ML and the dynamic process of photo‐induced RTP in the same molecule. Through the detailed investigation of photophysical properties together with crystal structures, the key role of molecular packing and intermolecular interactions was highlighted in the luminescence response by mechanical and light stimulus, affording efficient strategies to design potential smart functional materials with multiple luminescence properties. Multiple luminescence responses: Molecular packing is highlighted to illustrate the internal mechanism of mechanoluminescence and photo‐induced room‐temperature phosphorescence as combined effects.