Acid/Base and H2PO4– Controllable High-Contrast Optical Molecular Switches with a Novel BODIPY Functionalized [2]Rotaxane

• DOI: 10.1021/acsami.5b07574
• Publication Date: 2015-11-09T13:16:20Z
• Authors: Reguram Arumugape...; Venkatesan Sriniv...; Mandapati V. Rama...; Ming-Chang Lin; Tarun Shukla; Ravinder Singh; Hong-Cheu Lin
• Keywords: Rotaxane; BODIPY; Molecular switch; Photoinduced electron transfer

A novel multifunctional mechanically interlocked switchable [2]rotaxane R4 containing two molecular stations and rotaxane arms terminated with boron-dipyrromethene (BODIPY) fluorophores its derivatives were synthesized for the first time by CuAAC click reaction. The shuttling motion of macrocycle between dibenzylammonium triazolium recognition sites distance dependent photoinduced electron transfer process is demonstrated utilizing external chemical stimuli (acid/base). Interestingly, reversible self-assembly was recognized acid–base switch strategy. Notably, symmetrical groups acted as stations, H2PO4– receptors, H-bonded donors. Both thread R2 excellent optical responses high selectivity toward ion. specific guest–host interactions machines (MIMs) also further explored quantum mechanical calculations. to enable detection in RAW 264.7 cells successfully.