Journal
JOURNAL OF FLUORESCENCE
Volume 19, Issue 4, Pages 705-713Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10895-009-0464-0
Keywords
Nanofabric; Singlet oxygen; Energy transfer; Bactericidal; Photooxidation
Funding
- Czech Science Foundation [203/08/0831, 203/07/1424, 203/06/1244]
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Polymeric polyurethane nanofabrics doped by zinc tetraphenylporphyrin (ZnTPP) and/or zinc phthalocyanine (ZnPc) photosensitizers were prepared by the electrospinning method and characterized by microscopic methods, steady-state and time-resolved fluorescence, and absorption spectroscopy. Nanofabrics doped by both ZnTPP and ZnPc efficiently harvest visible light to generate triplet states and singlet oxygen O(2)((1)Delta(g)) with a lifetime of about 15 mu s in air atmosphere. The energy transfer between the excited singlet states of ZnTPP and ground states of ZnPc is described in details. All nanofabrics have bactericidal surfaces and photooxidize inorganic and organic substrates. ZnTPP and ZnPc in the polyurethane nanofabrics are less photostable than incorporated free-base tetraphenylporphyrin (TPP).
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