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Nucleic Acids Symposium Series 1999 42(1):149-150; doi:10.1093/nass/42.1.149
© 1999 by Oxford University Press
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DNA coated with cationic fullerene derivative. A possible micro-wire in water

Shigeori Takenaka1, Kenich Yamashita1, Makoto Takagi1, Taizo Hatta2 and Otohiko Tsuge2

1 Department of Chemical Systems and Engineering, Kyushu University, Fukuoka 812-8581, Japan, 2 Department of Applied Chemistry, Kumamoto Institute of Technology, Kumamoto 860-0082, Japan

Fullerene derivative 2 carrying pyridinium cation bound to sonicated calf thymus DNA in water. The binding ratio was 1 fullerene unit to 1 phosphate residue, giving the complex where DNA strand is seemingly coated with electron-conducting fullerenes. Cyclic voltammetry shows three-step redox couples in the complex, and the current peaks were broadened and shifted to positive side as compared to uncomplexed 2. Binding of 2 onto grooves of DNA double helix was suggested.


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