Photophysics and Light-Activated Biocidal Activity of Visible-Light-Absorbing Conjugated Oligomers
| Autor: | Eunkyung Ji, Thomas S. Corbitt, David G. Whitten, Anand Parthasarathy, Kirk S. Schanze, Dimitri Dascier, Subhadip Goswami |
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| Rok vydání: | 2013 |
| Předmět: |
Light
Singlet Oxygen Polymers Singlet oxygen Arylene Cationic polymerization Bacterial Infections Thiophenes Electronic structure Conjugated system Photochemical Processes Photochemistry chemistry.chemical_compound Terthiophene Intersystem crossing chemistry Drug Resistance Bacterial Humans General Materials Science Disinfectants Visible spectrum |
| Zdroj: | ACS Applied Materials & Interfaces. 5:4516-4520 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | The photophysical properties of three cationic π-conjugated oligomers were correlated with their visible light activated biocidal activity vs S. aureus. The oligomers contain three arylene units (terthiophene, 4a; thiophene-benzotriazole-thiophene, 4b; thiophene-benzothiadiazole-thiophene, 4c) capped on each end by cationic −(CH2)3NMe3+ groups. The oligomers absorb in the visible region due to their donor–acceptor–donor electronic structure. Oligomers 4a and 4b have high intersystem crossing and singlet oxygen sensitization efficiency, but 4c has a very low intersystem crossing efficiency and it does not sensitize singlet oxygen. The biocidal activity of the oligomers under visible light varies in the order 4a > 4b ≈ 4c. |
| Databáze: | OpenAIRE |
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