Rationally Designed Self-Immolative Rotaxane Sensor Based on Pillar[5]arene for Fluoride Sensing
摘要:
We develop a self-immolative rotaxane sensor for fluoride sensing based on host-guest interactions between pillar[5]arene and fluoride-promoted cleavage of Si-O bond. Because of the selective and fast reaction between silane and fluoride, the rotaxane sensor shows anion selectivity and rapid response. The self-immolative nature of the rotaxane improve its sensitivity. Moreover, a fluoride sensing test paper based on the rotaxane sensor is made, which shows the practicable application of the rotaxane sensor.
Rationally Designed Self-Immolative Rotaxane Sensor Based on Pillar[5]arene for Fluoride Sensing
摘要:
We develop a self-immolative rotaxane sensor for fluoride sensing based on host-guest interactions between pillar[5]arene and fluoride-promoted cleavage of Si-O bond. Because of the selective and fast reaction between silane and fluoride, the rotaxane sensor shows anion selectivity and rapid response. The self-immolative nature of the rotaxane improve its sensitivity. Moreover, a fluoride sensing test paper based on the rotaxane sensor is made, which shows the practicable application of the rotaxane sensor.
Based on the pillar[5]arene/alkane recognition motif, two [2]rotaxanes were successfully prepared. Their formation was confirmed by NMR spectroscopy and ESI mass spectrometry. We also demonstrated that 3,5-dinitrophenyl group and 3,5-bis(trifluoromethyl)phenyl group are big enough to work as stoppers for DPPillar[5]arene, which lays a foundation for the preparation of more complex and functional supramolecular structures. (C) 2012 Published by Elsevier Ltd.