Polystyrene nanofiber materials modified with an externally bound porphyrin photosensitizer
Language English Country United States Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
23566280
DOI
10.1021/am4004057
Knihovny.cz E-resources
- MeSH
- Adsorption MeSH
- Anti-Bacterial Agents chemistry pharmacology MeSH
- Water Pollutants, Chemical isolation & purification MeSH
- Escherichia coli drug effects MeSH
- Photosensitizing Agents chemistry MeSH
- Ions MeSH
- Nanofibers chemistry MeSH
- Lead isolation & purification MeSH
- Polystyrenes chemistry MeSH
- Porphyrins chemistry pharmacology MeSH
- Singlet Oxygen chemistry MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Anti-Bacterial Agents MeSH
- Water Pollutants, Chemical MeSH
- Photosensitizing Agents MeSH
- Ions MeSH
- Lead MeSH
- Polystyrenes MeSH
- Porphyrins MeSH
- Singlet Oxygen MeSH
Polystyrene ion-exchange nanofiber materials with large surface areas and adsorption capacities were prepared by electrospinning followed by the sulfonation and adsorption of a cationic 5,10,15,20-tetrakis(1-methylpyridinium-4-yl)porphyrin (TMPyP) photosensitizer on the nanofiber surfaces. The morphology, structure, and photophysical properties of these nanofiber materials were characterized by microscopic methods and steady-state and time-resolved fluorescence and absorption spectroscopies. The externally bound TMPyP can be excited by visible light to form triplet states and singlet oxygen O2((1)Δg) and singlet oxygen-sensitized delayed fluorescence (SODF). The photophysical properties of the nanofibers were strongly dependent on the amount of bound TMPyP molecules and their organization on the nanofiber surfaces. The nanofibers demonstrated photooxidative activity toward inorganic and organic molecules and antibacterial activity against E. coli due to the sensitized formation of O2((1)Δg) that is an effective oxidation/cytotoxic agent. The nanofiber materials also adsorbed heavy metal cations (Pb(2+)) and removed them from the water environment.
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