A Pi-Extended Luminogen With Colorimetric And Off/On Fluorescent Multi-Channel Detection For Cu2+ With Extremely High Selectivity And Sensitivity Via Nonarylamine-Based Organic Mixed Valence

A luminogen (ITP-TPE) comprising isothianaphthene-bridged tetraphenylethene units was efficiently synthesized. Its unique extended pi-conjugated structure allows for colorimetric and off/on fluorescent detection for Cu2+ with extremely high selectivity and sensitivity, by the formation of nonarylamine-based organic mixed-valence state.