Specific naked eye sensing of cyanide by chromogenic host: Studies on the effect of solvents

Jongmin Kang, Eun Joo Song, Hyun Kim, Young Hee Kim, Youngmee Kim, Sung Jin Kim, Cheal Kim

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We have synthesized receptor 1, which showed high selectivity toward CN- over other competitive anions in protic solvents. In addition, it distinguished CN- from other anions by color changes. Furthermore, its detection limit is far below the WHO guidelines of drinking water. However, in aprotic solvents such as acetonitrile, the unique selectivity for CN - disappeared, and the nonselective color change was observed for strongly basic anions such as F-, AcO-, and H 2PO4-. These results suggest that receptor 1 interacts with cyanide with different mechanisms depending on solvents. The interaction mechanisms between 1 and cyanide in protic and aprotic solvents were investigated.

Original languageEnglish
Pages (from-to)1015-1019
Number of pages5
JournalTetrahedron Letters
Issue number8
StatePublished - 20 Feb 2013

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2010-0021333 , 2012001725 , 2011K000675 , and 2012008875 ).


  • Chemodosimetric approach
  • Colorimetric sensing
  • Cyanide sensing
  • Naked eye sensing
  • Solvents effects


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