A Perylene-Bridged Switchable [3]Rotaxane Molecular Shuttle with a Fluorescence Output

作者：Cao, Zhan-Qi; Li, Hong; Yao, Jian; Zou, Lei; Qu, Da-Hui^*; Tian, He

来源：Asian Journal of Organic Chemistry, 2015, 4(3): 212-216.

DOI：10.1002/ajoc.201402201

• fluorescence
• mechanically interlocked molecules
• perylene bisimides
• rotaxanes
• shuttling motion

A bistable bis-branched [3]rotaxane with a perylene bisimide (PBI) chromophore that separates two mechanically interlocked [2]rotaxane arms including a diferrocene-functionalized dibenzo-24-crown-8 ring, was designed, prepared, and characterized by (HNMR)-H-1 and (CNMR)-C-13 spectroscopy and HR-ESI mass spectrometry. The uniform relative shuttling movement of target [3]rotaxane in response to external acid-base stimuli was confirmed by (HNMR)-H-1 spectroscopy. Furthermore, the shuttling motion of the macrocycles in the system was accompanied by a remarkably visual fluorescence change due to the distance-dependent photoinduced electron transfer process from the ferrocene units to the PBI fluorophore. This kind of rotaxane has important potential for designing more sophisticated mechanically interlocked molecules with controllable functions.

• 出版日期2015-3
• 单位华东理工大学