“…Among these sensing schemes, the detection based on absorption and emission properties has been employed more frequently, and included in situ synthesis of fluorescent Cu NCs (through the turn on/turn-off mechanism), fluorescent quenching through the inner filter effect (IFE), FRET, and electron transfer, and enhanced fluorescent intensity (mostly due to AIE mechanisms). Accordingly, a lot of studies have recently been conducted on potential applications of Cu NCs as a fluorescent sensor for detection of various compounds such as anions, namely, halides (Cl À , Br À and I À ), 63,201 S 2À , 28,153,165,202,203 64 and phosphate; 204 cations, such as Ag + , 63,205 This journal is © The Royal Society of Chemistry and the Chinese Chemical Society 2019…”