Photophysical Properties and Singlet Oxygen Generation Efficiencies of Water‐Soluble Fullerene Nanoparticles |
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Authors: | Alexander S. Stasheuski Victor A. Galievsky Alexander P. Stupak Boris M. Dzhagarov Mi Jin Choi Bong Hyun Chung Jin Young Jeong |
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Affiliation: | 1. B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, , Minsk, Belarus;2. BioNanotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology, , Daejeon, South Korea |
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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. |
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