Abstract
Fullerols of C60 and of C70 [C60(OH)n, C70(OH)m], water-soluble fullerene derivatives, unlike some other fullerene derivatives (such as C60 (C4H6O), C60 (C3H7N) and C60 [C(COOEt)2]x), do not result in excited triplet state but in ionization via monophotonic process in aqueous solutions with 248 nm laser. The quantum yields of formation of hydrated electron (Φe −) are determined to be 0.08 and 0.11 for fullerols of C60 and of C70 respectively at room temperature (ca. 15°C) with KI solution used as reference. By laser flash photolysis and oxidation of sulfate radical anion SO4 −, the fullerol radical cation or neutral radical of C60 is confirmed to be existent and the transient absorption spectra of fullerol radical cation of C70 are observed for the first time.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Jensen, A. W., Wilson, S. R., Schuster, D. I., Biological applications of fullerenes,Bioorg. Med. Chem., 1996, 4(6):767.
Andersson, T., Sundahl, M., Westrnan, G. et al., Host-guest chemistry of fullerenes: a water soluble complex between C70 and γ-cyclodextrin,Tetrahedron Lett., 1994, 35:7103.
Li, W. Z., Qian, K. X., Huang, W. D. et al., Water soluble C60-liposome and the biological effect of C60 to human cervix cancer cells,Chin. Phys. Lett., 1994, 11(4):207.
Jin, C. Y., Zhang, D. D., Oguma, T. et al., Studies on novel cyclodextrins: inclusion of C60 and C70,J. Inclusion Phenom. Mol. Recognit. Chem., 1996, 24:301.
Tokuyama, H., Yamago, S., Nakamura, E. et al., Photoinduced biochemical activity of fullerene carboxylic acid,J. Am. Chem. Soc., 1993, 115(17):7918.
Sijbesma, R., Srdanov, G., Wudl, F. et al., Synthesis of a fullerene derivative for the inhibition of HIV enzymes,J. Am. Chem. Soc., 1993, 115(15):6510.
Boutorine, A. S., Tokuyama, H., Takasugi, M. et al., Fullerene-oligonucleotide conjugates: photoinduced sequence-specific DNA cleavage,Angew. Chem. Int. Ed. Engl., 1994, 33(23/24):2462.
Chiang, L. Y., Wang, L. Y., Swirczewski, J. W. et al., Efficient synthesis of polyhydroxylated fullerene derivatives via hydrolysis of polycyclo-sulfated precursors,J. Org. Chem., 1994, 59(14):3960.
Chiang, L.Y., Lu, F.J., Lin, J.T., Free radical scavenging activity of water-soluble fullerenols,J. Chem. Soc. Chem. Commun., 1995, 1283.
Zhu, Y. S., Sun, D. Y., Liu, G. Z. et al., An ESR study on OH-radical scavenging activity of water-soluble fullerenol,Chem. J. Chinese. Universities (in Chinese), 1996, 17(7):1127.
Zuo, Z. H., Yao, S. D., Luo, J. et al., Laser photolysis of cytidine and dCMP in aqueous solution,J. Photochem. Photobiol. B:Biol., 1992, 15:215.
Wala, M. E., Bothe, H. G., Schulte-Frohlinde, D., Quantum yields for generation of hydrated electrons and single-strand breaks in poly(C), poly(A) and single-stranded DNA in aqueous solution upon 20 ns laser excitation at 248 nm,J. Photochem. Photobiol. A:Chem., 1990, 53:87.
Guldi, D. M., Asmus, K. D., Photophysical properties of mono-and multiply-functionalized fullerene derivatives,J. Phys. Chem. A, 1997, 101(8):1472.
Yao, S. D., Lian, Z. R., Lin, W. Z. et al., Transient species of fullerenes studied with pulse radiolysis and laser photolysis,Science in China, Ser. B, 1996, 39(6):561.
Steenken, S., Warren, C. J., Gilbert, B. C., Generation of radical-cations from naphthalene and some derivatives, both by photoionization and reaction with SO4 -: formation and reactions studied by laser flash photolysis,J. Chem. Soc. Perkin Trans. 2, 1990, 335.
Author information
Authors and Affiliations
Additional information
Project supported by the National Natural Science Foundation of China
Rights and permissions
About this article
Cite this article
Lu, C., Yao, S., Wang, W. et al. Laser flash photolysis of fullerols of C60 and of C70 in aqueous solutions. Sc. China Ser. B-Chem. 41, 259–265 (1998). https://doi.org/10.1007/BF02879705
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02879705