A new phosphorescent chemosensor bearing Zn-DPA sites for H 2PO4-

Hye Bin Kim, Yifan Liu, Dayoung Nam, Yinan Li, Sungnam Park, Juyoung Yoon, Myung Ho Hyun

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22 Scopus citations


A phosphorescence chemosensor bearing an iridium (III) complex as a communicating source and two Zn-DPA units acting as a preorganized binding site for H2PO4- is presented. The phosphorescent chemosensor displayed a selective phosphorescence enhancement with H 2PO4- in aqueous solution and at neutral pH. On the other hand, F-, Cl-, Br-, I-, NO3-, CH3COO-, and ClO 4- did not induce significant changes in phosphorescence. Furthermore, the phosphorescent chemosensor shows selectivity for H 2PO4- over the related phosphate species, such as ATP and pyrophosphate. In addition, there was a distinct lifetime change only for H2PO4-. The association constant was calculated to be 9.68 × 104 M-1 for H 2PO4-.

Original languageEnglish
Pages (from-to)20-24
Number of pages5
JournalDyes and Pigments
StatePublished - Jul 2014

Bibliographical note

Funding Information:
This research was supported by a grant from the National Research Foundation of Korea (NRF) funded by the Korean government (MSIP) (No. 2012-0002571 for M.H.H., No. 2010-0020209 for S.P. and National Creative Research Initiative : No. 2012R1A3A2048814 for J.Y.)


  • Anion recognition
  • Dihydrogen phosphate sensing
  • Iridium complex
  • Phosphate sensor
  • Phosphorescence chemosensor
  • Zinc complex


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