Intramolecular charge transfer dual fluorescence pH sensing using p-dibutylaminobenzoic acid-beta-cyclodextrin inclusion complex

The intramolecular charge transfer dual fluorescence of p-dibutylaminobenzoic acid -β-cyclodextrin inclusion complex showed a substantially higher sensitivity toward aqueous solution pH variation when compared with that of p-dibutylaminobenzoic acid alone, which established a new principle for direct CT fluorescence sensing in aqueous solution by using the CT fluorophore-cyclodextrin inclusion complex.