Photophysical properties and singlet oxygen generation efficiencies of water-soluble fullerene nanoparticles = 수용성 풀러렌 나노입자의 광물리 특성과 일항산소 발생 효율

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Title
Photophysical properties and singlet oxygen generation efficiencies of water-soluble fullerene nanoparticles = 수용성 풀러렌 나노입자의 광물리 특성과 일항산소 발생 효율
Author(s)
A S Stasheuski; V A Galievsky; A P Stupak; B M Dzhagarov; Mi Jin Choi; Bong Hyun Chung; Jin Young Jeong
Bibliographic Citation
Photochemistry and Photobiology, vol. 90, no. 5, pp. 997-1003
Publication Year
2014
Abstract
As various fullerene derivatives have been developed, it is necessary to explore their photophysical properties for potential use in photoelectronics and medicine. Here, we address the photophysical properties of newly synthesized water-soluble fullerene-based nanoparticles and polyhydroxylated fullerene as a representative water-soluble fullerene derivative. They show broad emission band arising from a wide-range of excitation energies. It is attributed to the optical transitions from disorder-induced states, which decay in the nanosecond time range. We determine the kinetic properties of the singlet oxygen (1O2) luminescence generated by the fullerene nanoparticles and polyhydroxylated fullerene to consider the potential as photodynamic agents. Triplet state decay of the nanoparticles was longer than 1O2 lifetime in water. Singlet oxygen quantum yield of a series of the fullerene nanoparticles is comparably higher ranging from 0.15 to 0.2 than that of polyhydroxylated fullerene, which is about 0.06. Conventional and time-resolved spectroscopy has been used to investigate polyhydroxylfullerene molecule and five fullerene-based nanoparticles. Our results demonstrate formation of disorder-induced states both in the polyhydroxylfullerene and in the nanoparticles.
ISSN
0031-5764
Publisher
Wiley
DOI
http://dx.doi.org/10.1111/php.12294
Type
Article
Appears in Collections:
Division of Research on National Challenges > Environmental diseases research center > 1. Journal Articles
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