The objective of this study is to evaluate the efficiency of a newly synthesized water-soluble cationic hexakis C60 derivative, C60(CR2)6 (R = CO2(CH2)2NH3+CF3CO2-), for inactivation of various indicator microorganisms. Results suggest that this C60 derivative efficiently inactivates MS2 bacteriophage under UVA more efficiently than commercial TiO2 photocatalyst. A relatively fast inactivation kinetics was also observed under visible light irradiation. The inactivation was found to result from photochemically generated singlet oxygen, as inactivation was prohibited in the presence of excess amount of L-histidine (singlet oxygen scavenger). The microbial inactivation with singlet oxygen was quantitatively evaluated: the exposure of photochemically produced singlet oxygen was determined using the degradation of furfuryl alcohol at specific time, expressed as CT (the product of singlet oxygen concentration and contact time), and the target microbial inactivation level was also observed at these times (-Log(N/N0)). These findings collectively suggested that this newly synthesized functionalized C60 might have a potential as a new antimicrobial agent which functions under visible light as well as UV light. 

Water-soluble C<sub>60</sub> derivative as novel photocatalyst: Biocidal properties

239th National Meeting (2010)

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Water-soluble C60 derivative as novel photocatalyst: Biocidal properties

Water-soluble C₆₀ derivative as novel photocatalyst: Biocidal properties