Design and synthesis of a molecule with aggregation-induced emission effects and its application in the detection of arsenite in groundwaterElectronic supplementary information (ESI) available: Experimental materials and methods, characterization data including 1H-NMR, 13N-NMR and MS, UV spectra and relevant data for compound 2. See DOI: 10.1039/c7tc00363c

A novel aggregation-induced emission (AIE) active molecule, compound 1 , was synthesized for the first time. Simultaneously, an ultra-sensitive and selective chemosensor 2 for the "turn-on" sensing of As 3+ based on the AIE mechanism has been developed by combining cysteine with compound 1 . Herein we report a new fluorescence sensor (compound 2 ) for the selective and sensitive detection of As 3+ in aqueous media by combining cysteine with a novel AIE active molecule 1 .