On/off fluorescence switch of a calix[4]arene by metal ion exchange

Su Ho Kim, Jung Kyu Choi, Sung Kuk Kim, Wonbo Sim, Jong Seung Kim

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


A new calix[4]arene-based fluorescence chemosensor displaying a strong excimer emission was prepared. When a Pb2+ ion is bound to the two amide oxygen atoms linked to the fluorophores, the ligand exhibits a marked quenched excimer emission due to its geometrical change during the complexation. By the addition of Ca2+ ion into the 1·Pb2+, the excimer emission band was revived, by which an interesting on/off switch process is proposed.

Original languageEnglish
Pages (from-to)3737-3741
Number of pages5
JournalTetrahedron Letters
Issue number22
Publication statusPublished - 2006 May 29
Externally publishedYes

Bibliographical note

Funding Information:
This research was fully supported by Grant of Dankook University, 2005.

ASJC Scopus subject areas

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry


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