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Water-soluble phosphorescent ruthenium complex with a fluorescent coumarin unit for ratiometric sensing of oxygen levels in living cells.
Hara, Daiki; Komatsu, Hirokazu; Son, Aoi; Nishimoto, Sei-Ichi; Tanabe, Kazuhito.
Affiliation
  • Hara D; Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura Campus, Nishikyo-ku, Kyoto, Kyoto 615-8510, Japan.
  • Komatsu H; Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura Campus, Nishikyo-ku, Kyoto, Kyoto 615-8510, Japan.
  • Son A; Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura Campus, Nishikyo-ku, Kyoto, Kyoto 615-8510, Japan.
  • Nishimoto S; Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura Campus, Nishikyo-ku, Kyoto, Kyoto 615-8510, Japan.
  • Tanabe K; Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura Campus, Nishikyo-ku, Kyoto, Kyoto 615-8510, Japan.
Bioconjug Chem ; 26(4): 645-9, 2015 Apr 15.
Article in En | MEDLINE | ID: mdl-25848851
ABSTRACT
Dual emission was applied to a molecular probe for the ratiometric sensing of oxygen concentration in a living system. We prepared ruthenium complexes possessing a coumarin unit (Ru-Cou), in which the (3)MLCT phosphorescence of the ruthenium complex was efficiently quenched by molecular oxygen, whereas the coumarin unit emitted constant fluorescence independent of the oxygen concentration. The oxygen status could be determined precisely from the ratio of phosphorescence to fluorescence. We achieved the molecular imaging of cellular oxygen levels using Ru-Cou possessing an alkyl chain, which provided appropriate lipophilicity to increase cellular uptake.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Oxygen / Ruthenium / Molecular Probes / Coumarins / Coordination Complexes / Fluorescent Dyes Limits: Humans Language: En Journal: Bioconjug Chem Journal subject: BIOQUIMICA Year: 2015 Document type: Article Affiliation country: Japan
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Oxygen / Ruthenium / Molecular Probes / Coumarins / Coordination Complexes / Fluorescent Dyes Limits: Humans Language: En Journal: Bioconjug Chem Journal subject: BIOQUIMICA Year: 2015 Document type: Article Affiliation country: Japan