Abstract
According to the high sensitivity of TICT (twisted intramolecular charge transfer) emission to external electric field strength, a novel fluorescence sensing mode for ions and neutral molecules in aqueous solution was proposed by using ionic micelle mediated TICT dual fluorescence was proposed. In the sensing system the ionic micelle acts as electric field mediator for the TICT fluorophore. Examples were given for sensing potassium nitrate, sodium dodecylsulfate, and β-cyclodextrin by using sodium p-diethylaminobenzoate(SDEAB)/cetyltrimethylammoinum bromide(CTAB) micelle sensing system. Linear response of dual fluorescence intensity ratio Ia/Ib to analyte concentration with correlation coefficient higher than 0.99 was observed for three analytes.
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