Rhodamine-based Hg2+-selective chemodosimeter in aqueous solution: fluorescent OFF-ON

Jia Sheng Wu, In Chul Hwang, Kwang S. Kim, Seung Kim Jong

Research output: Contribution to journalArticlepeer-review

449 Citations (Scopus)


(Chemical Equation Presented) N-(Rhodamine-6G)lactam-N′- phenylthiourea-ethylenediamine (1) was developed as a fluorescent and colorimetric chemodosimeter in aqueous solution with a broad pH span (5-10) and high selectivity toward Hg2+ but no significant response toward other competitive cations, such as Fe2+, Co2+, Ni2+, Cu2+, Zn2+, Pb2+, Cd2+, Ca 2+, Mg2+, K+, Na+, etc. The Hg 2+-promoted ring opening of spirolactam of the rhodamine moiety induced cyclic guanylation of the thiourea moiety, which resulted in the dual chromo- and fluorogenic observation (OFF-ON).

Original languageEnglish
Pages (from-to)907-910
Number of pages4
JournalOrganic Letters
Issue number5
Publication statusPublished - 2007 Mar 1
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry


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