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Metal ions are physiologically essential,but excessive metal ions may cause severe risk to plants and animals.Here,we prepared gold nanoclusters(Au NCs) protected by 11-mercaptoundecanoic acid(11-MUA),which have excellent fluorescence properties for the detection of metal ions.The results showed that the copper ions(Cu~(2+)) and iron ions(Fe~(3+)) in the solution have obvious quenching effect on the fluorescence intensity of Au NCs.The detection range of Fe~(3+) was 0.8–4.5 mmol/L(R~2= 0.992) and 4.5–11.0 mmol/L(R~2= 0.997).And Cu~(2+) has a lower linear range(0.1–1.0 mmol/L,R2= 0.993).When EDTA was added into the reaction system,it was observed that the quenching effect of Cu~(2+) and Fe~(3+)on Au NCs showed different phenomenon.Then,the effect of metal ions on the fluorescence of Au NCs was investigated.The selective detection of Cu~(2+) was achieved by EDTA masking of Fe~(3+).In addition,we realized the metal ions detection application of Au NCs in the serum
Metal ions are physiologically essential, but excessive metal ions may cause severe risk to plants and animals.Here, we prepared gold nanoclusters (Au NCs) protected by 11-mercaptoundecanoic acid (11-MUA), which have excellent fluorescence properties for the detection of metal ions. The results showed that the copper ions (Cu ~ (2+)) and iron ions (Fe ~ (3+)) in the solution have obvious quenching effect on the fluorescence intensity of Au NCs.The detection range of Fe ~ (3+) was 0.8-4.5 mmol / L (R ~ 2 = 0.992) and 4.5-11.0 mmol / L (R ~ 2 = 0.997) .And Cu 2+ has a lower linear range / L, R2 = 0.993) .When EDTA was added into the reaction system, it was observed that the quenching effect of Cu ~ (2+) and Fe ~ (3+) on Au NCs showed different phenomenon. Chen, the effect of metal ions on the fluorescence of Au NCs was investigated. The selective detection of Cu ~ (2+) was achieved by EDTA masking of Fe ~ (3 +). In addition, we realized the metal ions detection application of Au NCs in the serum