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

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• 作者：Yupeng Li ; Fangzhong Shen ; Huan Wang ; Feng He ; Zengqi Xie ; Houyu Zhang ; Zhiming Wang ; Linlin Liu ; Feng Li ; Muddasir Hanif ; Ling Ye ; Yuguang Ma
• 刊名：Chemistry of Materials
• 出版年：2008
• 出版时间：December 9, 2008
• 年：2008
• 卷：20
• 期：23
• 页码：7312-7318
• 全文大小：314K
• 年卷期：v.20,no.23(December 9, 2008)
• ISSN：1520-5002

文摘

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.