期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 78, 期 20, 页码 10344-10359出版社
AMER CHEMICAL SOC
DOI: 10.1021/jo401719c
关键词
-
资金
- Program for New Century Excellent Talents in University (China)
- Doctoral Program Foundation of the Ministry of Education of China [20113401110004]
- National Natural Science Foundation of China [21004001, 21271003, 21271004]
- Natural Science Foundation of the Education Committee of Anhui Province [KJ2012A024]
- Natural Science Foundation of Anhui Province [1208085MB22]
- 211 Project of Anhui University
- Ministry of Education Funded Projects Focus on Returned Overseas Scholar
- Anhui University [33190077]
Eight triphenylamine (TPA)-based Schiff bases that exhibit different aggregation-induced emission (AIE) or aggregation-caused quenching (ACQ) behavior in tetrahydrofuran (THF)/water mixtures have been synthesized and characterized. The photophysical properties in solution, aqueous suspension, film, and the crystalline state along with their relationships were comparatively investigated. The single-crystal structures of 1-8 indicate that compact pi center dot center dot center dot pi stacking or excimers induce fluorescence quenching of 1, 2, 5, and 7. However, the existence of J aggregates or multiple intra- and intermolecular interactions restrict the intramolecular vibration and rotation, enabling compounds 3, 4, 6, and 8 to exhibit good AIE character. The size and growth process of particles with different water fractions were studied using scanning electron microscopy, which demonstrated that smaller uniformly dispersed nanoparticles in the THF/water mixtures favor fluorescence emission. The above results suggest that the combined effects of multiple forces caused by structural variation have a great influence on their molecular packing, electronic structure, and aggregation-induced fluorescence properties. In addition, piezofluorochromic experiments verified the potential applications of 4 and 6.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据