Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 1, Issue 11, Pages 2529-2535Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am900467b
Keywords
colorimetric chemosensor; cyanide; indirect method; rhodamine-based dye; high sensitivity; visual detection
Funding
- Program of NCET
- National Fundamental Key Research Program
- Hubei Province
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By applying an indirect strategy, a new rhodamine-based dye (1) was successfully developed as a colorimetric chemosensor for the sensitive detection of cyanide. In the presence of copper ions, the colorless solution of compound I changed to magenta: however, upon the addition Of trace cyanide, the magenta color faded to colorless immediately, with a detection limit as low as 0.013 ppm (Delta A = 0.054), much lower than the Maximum Contaminant Level for cyanide In drinking water (0.20 ppm) set by the US Environmental Protection Agency. Other anions, including Cl-, l(-), lO(3)(-), SO42-, NO2-, Br-, H2PO4-, F-, SCN-, HSO4-, and ClO4-, had nearly no influence on the probing behavior of dye I toward cyanide.
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