Sensitive and selective chemosensor for instant detecting fluorine ion via different channels

摘要

We developed a simple F--selective chemosensor system based on bilateral Schiff bases. By studying the single crystals of DMBS, we could find that the two naphthalene OH groups were intramolecularly hydrogen-bonded with the nitrogen atoms of the imine and C-H horizontal ellipsis pi interactions of DMBS leading to the formation of two-dimensional sheets in the crystal lattice. The sensor DMBS could detect F- ions with high selectivity and sensitivity by the mechanism of photoinduced electron transfer. In addition, the obvious colour changes and pronounced ON-OFF-type fluorescent signalling behavior can be seen by naked eye.