A red fluorescent ‘turn-on’ chemosensor for Hg2+ based on triphenylamine–triazines derivatives with aggregation-induced emission characteristics

A new sensitive and selective red fluorescence ‘turn on’ chemosensor 1 for Hg2+ was developed by taking advantage of AIE feature of triphenylamine–triazines motif and the specific binding of thymine with Hg2+. Moreover, chemosensor 1 exhibited large two-photon absorption cross-section (3328 GM).