Rhodamine-Based “Turn-On” Fluorescent Chemodosimeter for Cu(II) on Ultrathin Platinum Films as Molecular Switches


  • Y.-R. Kim and H. J. Kim contributed equally to this work. This work was supported by the KOSEF grant, funded by the Korea government (MEST; R11-2005-008-03003-0, R11-2005-008-02001-0) and Basic Science Research of KOSEF (R01-2006-000-10001-0). Y.-R. Kim was supported by the Brain Korea 21 fellowship. H. J. Kim was supported by the Seoul Fellowship. Supporting Information is available online from Wiley InterScience or from the authors.


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A thiol-functionalized rhodamine-based chemodosimeter on platinum films (PFIR) is successfully used for the first time as a molecular switch for the fluorescent sensing of Cu2+. In addition, the colorimetric response (colorless to pink) of the PFIR could be detected by the naked eye as platinum films display optical transparency (transmittance of ∼0.70) in the visible spectral region.