Blar i forfatter "Borisov, Sergey M."

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    • Amphiphilic Rhenium-Oxo Corroles as a New Class of Sensitizers for Photodynamic Therapy 

      Einrem, Rune F.; Alemayehu, Abraham; Borisov, Sergey M.; Ghosh, Abhik; Gederaas, Odrun Arna (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-27)
      A set of rhenium(V)-oxo <i>meso</i>-triarylcorroles bearing ester and carboxylic acid functionalities were synthesized with a view to determining their potential for photodynamic therapy. Toward this end, we measured their near-IR phosphorescence and their ability to sensitize singlet oxygen formation. The two esters studied, Re<sup>V</sup>O 5,10,15-tris(<i>meta</i>-carbomethoxyphenyl)corrole and ...

    • Influence of Fluorinated Substituents on the Near-Infrared Phosphorescence of 5d Metallocorroles 

      Johannessen, Krister Engedal; Johansen, Martin Amund Langaas; Einrem, Rune Finsås; McCormick McPherson, Laura J.; Alemayehu, Abraham; Borisov, Sergey M.; Ghosh, Abhik (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-07-12)
      The influence of fluorinated substituents on the luminescent properties of rhenium-oxo, osmium-nitrido, and gold triarylcorroles was studied via a comparison of four ligands: triphenylcorrole (TPC), tris(ptrifluoromethylphenyl)corrole (TpCF<sub>3</sub>PC), tris{3,5-bis(trifluoromethyl)- phenyl}corrole (T3,5-CF<sub>3</sub>PC), and tris(pentafluorophenyl)corrole (TPFPC). For each metal series ...

    • Iridium Corroles Exhibit Weak Near-Infrared Phosphorescence but Efficiently Sensitize Singlet Oxygen Formation 

      Thomassen, Ivar Kristian; Mccormick-Mcpherson, Laura J; Borisov, Sergey M.; Ghosh, Abhik (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-05)
      Six-coordinate iridium(III) triarylcorrole derivatives, Ir[T<i>p</i>XPC)]L<sub>2</sub>, where T<i>p</i>XPC = tris(<i>para</i>-X-phenyl)corrole (X = CF<sub>3</sub>, H, Me, and OCH<sub>3</sub>) and L = pyridine (py), trimethylamine (tma), isoquinoline (isoq), 4-dimethylaminopyridine (dmap), and 4-picolinic acid (4pa), have been examined, with a view to identifying axial ligands most conducive to ...

    • Osmium-nitrido corroles as NIR indicators for oxygen sensors and triplet sensitizers for organic upconversion and singlet oxygen generation 

      Borisov, Sergey M.; Alemayehu, Abraham; Ghosh, Abhik (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-26)
      The photophysical properties of nitridoosmium(VI) corroles have been investigated. The complexes exhibit room temperature NIR phosphorescence (l<sub>max</sub> 779–795 nm). Long decay times (110–150 ms in solution and 136–183 ms in polystyrene) are responsible for efficient quenching of the emission by oxygen. All the complexes act as efficient sensitizers of singlet oxygen (quantum yields of ...

    • Rhenium-Imido Corroles 

      Alemayehu, Abraham; Teat, Simon J.; Borisov, Sergey M.; Ghosh, Abhik (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-10)
      Metallocorroles involving 5d transition metals are currently of interest as near-IR phosphors and as photosensitizers for oxygen sensing and photodynamic therapy. Their syntheses, however, are often bedeviled by capricious and low-yielding protocols. Against this backdrop, we describe rhenium-imido corroles, a new class of 5d metallocorroles, synthesized simply and in respectable (∼30%) yields via ...

    • Stable Platinum(IV) Corroles: Synthesis, Molecular Structure, and Room-Temperature Near-IR Phosphorescence 

      Alemayehu, Abraham; McCormick, Laura J; Gagnon, Kevin J.; Borisov, Sergey M.; Ghosh, Abhik (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-17)
      A series of stable Pt(IV) corrole complexes with the general formula Pt<sup>IV</sup>[TpXPC](<i>m/p</i>-C<sub>6</sub>H<sub>4</sub>CN)(py), where TpXPC<sup>3–</sup> is the trianion of a tris(<i>p</i>-X-phenyl)corrole and X = CF<sub>3</sub>, H, and CH<sub>3</sub>, has been synthesized, affording key physicochemical data on a rare and elusive class of metallocorroles. Single-crystal X-ray structures of ...