Browsing by Subject "Porphyrins"
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Item Open Access A Noble-Metal-Free Heterogeneous Photosensitizer-Relay Catalyst Triad That Catalyzes Water Oxidation under Visible Light(Wiley-VCH Verlag, 2018) Ulusoy-Ghobadi, Türkan Gamze; Yıldız, E. A.; Büyüktemiz, M.; Akbari, S. Sadigh; Topkaya, D.; İşçi, Ü.; Dede, Y.; Yağlioğlu, H. G.; Karadaş, FerdiAn entirely earth-abundant chromophore-relay water oxidation catalyst triad system, which is robust and efficient at neutral pH, is presented. The synthesis involves the coordination of a porphyrin derivative to a bridging Fe(CN)5 group, which is then reacted with Co ions to prepare a covalently linked chromophore-Prussian blue analogue assembly. Light-driven water oxidation studies in the presence of an electron scavenger indicate that the triad is active and it maintains a steady activity for at least three hours. Transient absorption experiments and computational studies reveal that the Fe(CN)5 group is more than a linker as it takes part in electron-transfer and co-operates with porphyrin in the charge separation process.Item Open Access Supramolecular assemblies of cucurbiturils with photoactive, π-conjugated chromophores(Wiley-VCH Verlag, 2018) Koç, Ahmet; Tuncel, DönüşSupramolecular assemblies of cucurbituril (CBn) homologues with π-conjugated chromophores will be overviewed. Special emphasis will be given to the effect of CBn on the optical properties of conjugated oligomers and polymers. How supramolecular complexes of π-conjugated chromophores including porphyrin derivatives, conjugated oligomers and polymers with CBn could be utilized in the theranostic and photonic applications will also be discussed.Item Open Access Synthesis and investigation of singlet oxygen production efficiency of photosensitizers based on meso-phenyl-2,5-thienylene linked porphyrin oligomers and polymers(Royal Society of Chemistry, 2015) Khan, R.; Idris, M.; Tuncel, D.Three new Zn(ii)-, oligo- and poly(2,5-thienylene)-linked porphyrins, bearing multiple triethylene glycol (TEG) groups, on all meso aryl positions were synthesized via Stille and Suzuki coupling reactions and their photophysical properties as well as singlet oxygen generation efficiencies have been investigated to elucidate the possibility of their use as a photosensitizer for photodynamic therapy (PDT) and photodynamic inactivation of bacteria. © The Royal Society of Chemistry 2015.