Fluorescence imaging of intracellular cadmium using a dual-excitation ratiometric chemosensor

Masayasu Taki, Mika Desaki, Akio Ojida, Shohei Iyoshi, Tasuku Hirayama, Itaru Hamachi, Yukio Yamamoto

Research output: Contribution to journalArticlepeer-review

195 Citations (Scopus)


We described here a coumarin-based dual-excitation ratiometric probe for cadmium, CadMQ. This fluorescence sensor has high quantum yields of 0.59 and 0.70 in the metal-free and Cd2+-bound forms, respectively, and has a dissociation constant of 0.16 nM for Cd2+. CadMQ is cell permeable and locates within the acidic compartments of the cells. We further show that CadMQ is a useful tool to ratiometrically probe the change in the intracellular Cd2+ levels with the use of two excited wavelengths.

Original languageEnglish
Pages (from-to)12564-12565
Number of pages2
JournalJournal of the American Chemical Society
Issue number38
Publication statusPublished - Sept 24 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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