Knör, Günther 
Alternative Links zum Volltext:DOIVerlag
| Dokumentenart: | Artikel |
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| Titel eines Journals oder einer Zeitschrift: | Inorganic Chemistry Communications |
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| Verlag: | ELSEVIER SCIENCE BV |
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| Ort der Veröffentlichung: | AMSTERDAM |
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| Band: | 4 |
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| Nummer des Zeitschriftenheftes oder des Kapitels: | 3 |
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| Seitenbereich: | S. 160-163 |
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| Datum: | 2001 |
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| Institutionen: | Chemie und Pharmazie > Institut für Anorganische Chemie |
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| Identifikationsnummer: | | Wert | Typ |
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| 10.1016/S1387-7003(01)00165-4 | DOI |
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| Stichwörter / Keywords: | ELECTRON-TRANSFER; NUCLEIC-ACIDS; STRAND SCISSION; DNA; COMPLEXES; DAMAGE; POTENTIALS; CHEMISTRY; MECHANISM; REDUCTION; porphyrins; gold; pyrene; photocatalysis; DNA; photonuclease activity |
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| Dewey-Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
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| Status: | Veröffentlicht |
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| Begutachtet: | Ja, diese Version wurde begutachtet |
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| An der Universität Regensburg entstanden: | Ja |
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| Dokumenten-ID: | 73794 |
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Zusammenfassung
The novel cationic gold porphyrin complex [(TPYRP)Au-III](+) CH3COO- with TPYRP = dianion of 5,10,1 5,20-tetrakis(1-pyrenyl)porphyrin was prepared and characterized by optical spectroscopy and high-resolution electrospray mass spectrometry. In addition to metalloporphyrin intraligand transitions, the compound shows charge transfer (CT) absorptions in the visible spectral region that are sensitive ...
Zusammenfassung
The novel cationic gold porphyrin complex [(TPYRP)Au-III](+) CH3COO- with TPYRP = dianion of 5,10,1 5,20-tetrakis(1-pyrenyl)porphyrin was prepared and characterized by optical spectroscopy and high-resolution electrospray mass spectrometry. In addition to metalloporphyrin intraligand transitions, the compound shows charge transfer (CT) absorptions in the visible spectral region that are sensitive to variations of the solvent polarity. The photoreactivity of an intramolecular charge separated state of the photosensitizer populated by CT excitation was investigated in the presence of dioxygen and an excess of the purine nucleobase guanine. A photocatalytic oxidative degradation of guanine with a quantum yield of 0.03 +/- 0.01 and an initial turnover frequency of 66 per hour was observed upon irradiation with monochromatic visible light at 298 K. The potential of the cationic metallointercalator complex [(TPYRP)Au-III](+) to serve as a catalytic photonuclease for the sequence specific cleavage of DNA has been demonstrated. (C) 2001 Elsevier Science B.V. All rights reserved.
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