Fluorescent polyurethane nanofabrics: a source of singlet oxygen and oxygen sensing
Language English Country United States Media print
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
20222692
DOI
10.1021/la1001607
Knihovny.cz E-resources
- MeSH
- Fluorescence * MeSH
- Kinetics MeSH
- Oxygen analysis MeSH
- Nanofibers chemistry MeSH
- Polyurethanes * MeSH
- Porphyrins MeSH
- Singlet Oxygen MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Oxygen MeSH
- Polyurethanes * MeSH
- Porphyrins MeSH
- Singlet Oxygen MeSH
- tetraphenylporphyrin MeSH Browser
Polyurethane (PUR) nanofabrics based on nanofibers of average diameters in the range of 250-110 nm with different meso-tetraphenylporphyrin (TPP) loading (0.01-5 wt %) were prepared by an electrospinning process. The oxygen quenching of excited states and singlet oxygen-sensitized delayed fluorescence (SODF) of TPP were studied at different oxygen pressures. We found that TPP in PUR matrix is present in monomeric state, and it is easily accessed by oxygen. Analysis of the kinetics of the TPP triplet, singlet oxygen, and SODF indicates that repopulation of TPP fluorescent state includes reaction of singlet oxygen with TPP triplets. The integrated SODF achieved more than 20% of the prompt fluorescence for nanofabric loaded with 5 wt % TPP. The dependence of SODF intensity on the TPP concentration in nanofibers is nearly quadratic.
References provided by Crossref.org
Solubilization of Charged Porphyrins in Interpolyelectrolyte Complexes: A Computer Study
The Photodynamic Properties and the Genotoxicity of Heat-Treated Silicalite-1 Films
The nanoscaled metal-organic framework ICR-2 as a carrier of porphyrins for photodynamic therapy
Virucidal nanofiber textiles based on photosensitized production of singlet oxygen
