Rhodamine-based "turn-on" fluorescent chemodosimeter for Cu(II) on ultrathin platinum films as molecular switches

Yang Rae Kim, Hyun Jung Kim, Jong Seung Kim, Hasuck Kim

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109 Citations (Scopus)


A novel self-assembled monolayer (SAM) of rhodamine derivative as turn-on and intrinsic fluorescent switches on ultrathin, optically transparent platinum films, was reported. A rhodamine-based chemodosimeter was designed and its platinum-film-immobalized rhodamine (PFIR), responsible for a Cu 2+-induced ring-opening process, to provide fluorescence changes in aqueous media. SAMs covalently bound to glass can be hampered by hydrolysis of the Si-O bonds in basic media, while ring-opening reaction in methanol could occur in the presence of large excess of Cu2+ ions. It is also found that at a high concentration of Cu2+, the colorimetric response of PFIR could be detected by the naked eye, as platinum films display optical transparency in the visible spectral region.

Original languageEnglish
Pages (from-to)4428-4432
Number of pages5
JournalAdvanced Materials
Issue number23
Publication statusPublished - 2008 Dec 2


ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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