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Balanced Intersystem Crossing in Iodinated Silicon-Fluoresceins Allows New Class of Red Shifted Theranostic Agents

Cetin, Sultan; Elmazoglu, Zubeyir; Karaman, Osman; Gunduz, Hande; Gunbas, Gorkem; Kolemen, Safacan


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        "affiliation": "Koc Univ, Dept Chem, TR-34450 Istanbul, Turkey", 
        "name": "Cetin, Sultan"
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      {
        "affiliation": "Middle East Tech Univ, Dept Chem, TR-06800 Ankara, Turkey", 
        "name": "Elmazoglu, Zubeyir"
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      {
        "affiliation": "Middle East Tech Univ, Dept Chem, TR-06800 Ankara, Turkey", 
        "name": "Karaman, Osman"
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      {
        "affiliation": "Koc Univ, Dept Chem, TR-34450 Istanbul, Turkey", 
        "name": "Gunduz, Hande"
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        "affiliation": "Middle East Tech Univ, Dept Chem, TR-06800 Ankara, Turkey", 
        "name": "Gunbas, Gorkem"
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    "description": "Iodination of the silicon-fluorescein core revealed a new class of highly cytotoxic, red-shifted and water-soluble photosensitizer (SF-I) which is also fairly emissive to serve as a theranostic agent. Singlet oxygen generation capacity of SF-I was evaluated chemically, and up to 45% singlet oxygen quantum yield was reported in aqueous solutions. SF-I was further tested in triple negative breast (MDA MB-231) and colon (HCT-116) cancer cell lines, which are known to have limited chemotherapy options as well as very poor prognosis. SF-I induced efficient singlet oxygen generation and consequent photocytotoxicity in both cell lines upon light irradiation with a negligible dark toxicity while allowing cell imaging at the same time. SF-I marks the first ever example of a silicon xanthene-based photosensitizer and holds a lot of promise as a small-molecule-based theranostic scaffold.", 
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    "title": "Balanced Intersystem Crossing in Iodinated Silicon-Fluoresceins Allows New Class of Red Shifted Theranostic Agents"
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