期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 13, 期 13, 页码 4090-4100出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ob00068h
关键词
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资金
- National Natural Science Foundation of China [21272088, 21472059, 21402057]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education
- self-determined research funds of CCNU from the colleges' basic research and operation of MOE [CCNU14A05009, CCNU14F01003]
A series of novel [n]rotaxanes based on a tetraphenylethene (TPE) backbone were constructed by a template-directed clipping approach and their structures were well-characterized. Investigation of their optical properties showed that these rotaxanes and their corresponding ammonium salts showed aggregation-induced emission (AIE) behavior. However, there were obvious differences as follows: (1) rotaxanes reached the aggregation state in the presence of less water compared with the corresponding ammonium salt; (2) the rotaxanes with a long alkoxyl chain on the pyridine unit of the crown ether formed the aggregation state in the presence of less water than for those without an alkoxyl substituent and (3) a smaller distance between the TPE unit and N-hetero crown ether component resulted in the aggregation state being reached more easily than when there is a longer distance. The results suggest that the mechanically interlocked structures can adjust the aggregation state of AIE molecules.
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