Nonplanar Ladder-Type Polycyclic Conjugated Molecules: Structures and Solid-State Properties
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- 作者：Kuojin Liu ; Feng Qiu ; Chongqing Yang ; Ruizhi Tang ; Yubin Fu ; Sheng Han ; Xiaodong Zhuang ; Yiyong Mai ; Fan Zhang ; Xinliang Feng
- 刊名：Crystal Growth & Design
- 出版年：2015
- 出版时间：July 1, 2015
- 年：2015
- 卷：15
- 期：7
- 页码：3332-3338
- 全文大小：450K
- ISSN：1528-7505
文摘
Using an efficient intramolecular carbon鈥揷arbon cross-coupling reaction, a series of new ladder-type conjugated molecules have been prepared successfully in high yields. Such a pyran-fused polycylic structure possesses an extended 蟺-conjugated backbone with flexible conformation, which gives these molecules interesting properties, including high solubility in common organic solvents, excellent thin film-forming abilities, blue fluorescent emission with good quantum yields, and aggregate formation in a binary solvent. The self-assembly behaviors of these molecules as well as various nanostructures can be finely tailored by varying the substituted group on the molecular periphery. The powder and single-crystal X-ray diffraction analyses revealed that the synergetic effect of 蟺鈥撓€ stacking and van der Waals interactions play a key role in controlling the morphologies of these aggregates. More importantly, self-assembled molecules exhibit good fluorescent performance, due to their twist backbone conformation.