"Turn-Off" Supramolecular Fluorescence Array Sensor for Heavy Metal Ion Identification.
Qin WangKai-Ni WeiShu-Zhen HuangQing TangZhu TaoYing HuangPublished in: ACS omega (2021)
A "turn-off" supramolecular fluorescence array sensor based on the host-guest complexes between fluorescence dyes and cucurbit[n]urils for sensing metal ions was developed. Three fluorescent probes (RhB@Q[7], H33342@2Q[7], and BRE@Q[7]) were used as the sensing units to construct a supramolecular fluorescence array sensor. The binding ability of the metal ions and cucurbituril-dye probes varied; therefore, the probes and metal ions produced different fluorescence responses. When combined with linear discriminant analysis (LDA), the qualitative and quantitative detection of seven metal ions was achieved. In analytical samples, the supramolecular fluorescence array sensor recognized and distinguish seven metal ions. These results provided new research ideas for the rapid analysis and real-time monitoring of different heavy metal ions.
Keyphrases
- energy transfer
- quantum dots
- single molecule
- water soluble
- living cells
- sensitive detection
- heavy metals
- aqueous solution
- high resolution
- small molecule
- high throughput
- loop mediated isothermal amplification
- fluorescent probe
- fluorescence imaging
- risk assessment
- high density
- health risk
- health risk assessment
- transcription factor
- single cell
- drinking water
- sewage sludge
- bioinformatics analysis