Citation:
WANG Zhao-Lu, FENG Hui-Yun, LI Yan, XU Tao, XUE Ze-Chun, LI Lian-Zhi. A High Selective Fluorescent Ratio Sensor for Cd2+ Based on the Interaction of Peptide with Metal Ion[J]. Chinese Journal of Inorganic Chemistry,
;2015, 31(10): 1946-1952.
doi:
10.11862/CJIC.2015.261
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A new fluorescent ratio chemosensor (Dansyl-Cys-Pro-Pro-Cys-Trp-NH2) for metal ions has been synthesized via Fmoc solid-phase peptide synthesis. The interactions of the peptide with metal ions were investigated by fluorescence spectroscopy. Results showed that it showed high selectivity toward Cd2+ over other commonly coexistent metal ions. The peptide has the advantages of specific recognition to Cd2+, a good water-soluble and a fast response. The peptide tightly binds to Cd2+ with the binding constant of 3.0×1011 L2·mol-2 and the detection limit of 11.5 nmol·L-1.
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