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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Borisov, Sergey
Graz University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2024Transition metal azahemiporphycenes as singlet oxygen sensitizerscitations
- 2023Bright and Photostable TADF-Emitting Zirconium(IV) Pyridinedipyrrolide Complexes: Efficient Dyes for Decay Time-Based Temperature Sensing and Imagingcitations
- 2022Materials for optical oxygen sensing under high hydrostatic pressurecitations
- 2022Porous matrix materials in optical sensing of gaseous oxygencitations
- 2019High-resolution optical pH imaging of concrete exposed to chemically corrosive environmentscitations
- 2018Wide-range optical pH imaging of cementitious materials exposed to chemically corrosive environmentscitations
- 2018Mn4+-Doped magnesium titanate-a promising phosphor for self-referenced optical temperature sensingcitations
- 2018OPTICAL PH IMAGING OF CONCRETE EXPOSED TO CHEMICALLY CORROSIVE ENVIRONMENTS
- 2018Macroporous Polymeric Oxygen Scavenger Material
- 2018New opportunities for optical temperature sensing with Mn<sup>4+</sup>-doped magnesium titanate
- 2013Tuning the dynamic range and sensitivity of optical oxygen-sensors by employing differently substituted polystyrene-derivativescitations
Places of action
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article
Transition metal azahemiporphycenes as singlet oxygen sensitizers
Abstract
Using free-base tris(p-X-phenyl)corrole (X = H, Me, OMe) as starting materials and 4-aminotriazole as the nitrogen source, we used a DDQ-mediated, room-temperature strategy for generating isocorroles to obtain the corresponding 6-azahemiporphycenes, H2[X-AHP], one of which was structurally characterized with single-crystal X-ray diffraction analysis. The free-base ligands were readily derivatized to their Pd(II), Pt(II), and Mn(II) complexes; of these, one Pd(II) complex was structurally characterized. Three of the complexes, M[Me-AHP] (M = Pd, Pt, Mn), were singled out for photophysical and singlet oxygen sensitization studies. Although none of the new complexes proved luminescent, Pd[Me-AHP] was found to be an excellent singlet oxygen sensitizer, with a singlet oxygen quantum yield of 84% in 9:1 v/v ethanol:tetrahydrofuran at room temperature. The corresponding value for Pt[Me-AHP] was found to be only 11% and that for Mn[Me-AHP] was essentially 0%. These singlet oxygen quantum yields were consonant with triplet lifetimes accessed via transition absorption spectroscopy. Combined with their strong absorption in the red, these findings suggest that palladium 6-azahemiporphycenes are worthy of exploration as a new class of triplet photosensitizers for photodynamic therapy of cancer and other diseases.