Supramolecular Network Conducting the Formation of Uniaxially Oriented Molecular Crystal of Cyano Substituted Oligo(p-phenylene vinylene) and Its Amplified Spontaneous Emission (ASE) Behavior

• Published in: Chemistry of materials 2008-12, Vol.20 (23), p.7312-7318
• Main Authors: Li, Yupeng, Shen, Fangzhong, Wang, Huan, He, Feng, Xie, Zengqi, Zhang, Houyu, Wang, Zhiming, Liu, Linlin, Li, Feng, Hanif, Muddasir, Ye, Ling, Ma, Yuguang
• Format: Article
• Language: English
• Subjects: Molecular Crystals; Optical Materials (including Non-Linear Optic, Photonic, and Optoelectronic Materials); Self-Assembly and Self-Assembled Materials
• ISSN: 0897-4756; 1520-5002
• DOI: 10.1021/cm801427s

The supramolecular interactions are of importance for inducing the molecular orientation and constructing functional materials with high performance. In this manuscript we report uniaxially oriented molecular crystal of a cyano substituted oligo(p-phenylene vinylene) 1,4-bis(α-cyano-4-diphenylaminostyryl)-2,5-diphenylbenzene (CNDPASDB) with high luminescence under the driving force of the three-dimensional supramolecular interaction networks. Amplified spontaneous emission (ASE) with a low threshold value of 30.5 kW/cm2 was observed from a high-quality slab-like CNDPASDB crystal and verified by the variable pump stripe method. The net gain coefficient with 55 cm−1 is also measured. The tip of CNDPASDB crystal exhibits polarized self-waveguided emission due to the propagation of polarized light emitted from the uniaxially oriented CNDPASDB molecules along crystal surface.