Achieving Persistent Room Temperature Phosphorescence and Remarkable Mechanochromism from Pure Organic Luminogens

• Published in: Advanced materials (Weinheim) Vol. 27; no. 40; pp. 6195 - 6201
• Main Authors: Gong, Yongyang, Chen, Gan, Peng, Qian, Yuan, Wang Zhang, Xie, Yujun, Li, Shuhong, Zhang, Yongming, Tang, Ben Zhong
• Format: Journal Article
• Language: English
• Published: Germany Blackwell Publishing Ltd 28.10.2015
• Subjects: Crystallization; crystallization-induced phosphorescence; Crystals; Dissipation; Excitons; intermolecular interactions; Luminescence; Luminescent Agents - chemistry; Luminescent Measurements; mechanochromism; Molecular Structure; persistent phosphorescence; Phosphorescence; pure organic luminogens; Quenching; Spectrum Analysis; Temperature; X-Ray Diffraction; intermolecular interactions; crystallization-induced phosphorescence; pure organic luminogens; persistent phosphorescence; mechanochromism
• ISSN: 0935-9648; 1521-4095
• DOI: 10.1002/adma.201502442

Persistent room temperature phosphorescence (RTP) from pure organic luminogens can be rationally realized based on the crystallization‐induced phosphorescence phenomenon and severe crystallization. A perfect crystal with dense molecular packing and effective inter­molecular interactions isolates the triplet excitons from quenching sites and significantly blocks the high‐energy vibrational dissipation, thus yielding long‐lasting RTP.