Bichromophoric rhodamine-rhenium(I) and -iridium(III) sensory system: Synthesis, characterizations, photophysical and selective metal ions binding studies Dedicated to Prof. Claude Lapinte.

Keith Man Chung Wong*, Chunyan Wang, Ho Chuen Lam, Nianyong ZHU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

A new class of rhenium(I) tricarbonyl diimine complexes containing rhodamine derivative as a sensory moiety, have been synthesized and characterized. Their photophysical and selective ion-binding properties have also been investigated, with the comparison of the previously reported cyclometalated iridium(III) system. One of the complex was found to exhibit selective binding toward Hg(II) ion with electronic absorption and emission spectral changes. On the other hand, the iridium(III) complexes were found to give similar electronic absorption response but different emission spectral changes upon addition of Hg(II) ion. Interestingly, efficient intramolecular energy transfer from rhodamine 6G to the cyclometalated iridium(III) moiety was suggested in one of the complexes, which could be modulated by selective ion-binding process upon ring-opening of rhodamine 6G. This report shows that the modification of rhodamine derivatives and the choice of transition metal ion could be important to influence the selective binding properties for development of colorimetric and/or luminescent probe.

Original languageEnglish
Pages (from-to)133-140
Number of pages8
JournalPolyhedron
Volume86
DOIs
Publication statusPublished - 28 Jan 2015

Scopus Subject Areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

User-Defined Keywords

  • Bichromophoric
  • Ion-binding
  • Iridium(III)
  • Rhenium(I)
  • Rhodamine

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