Journal
CHEMPHYSCHEM
Volume 10, Issue 1, Pages 206-210Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.200800459
Keywords
graphene; isothermal titration calorimetry; nanotubes; nucleobases; nucleosides
Funding
- Department of Science and Technology, India
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Interaction of two different samples of graphene with DNA nucleobases and nucleosides is investigated by isothermal titration calorimetry. The relative interaction energies of the nucleobases decrease in the order guanine (G) > adenine (A) > cytosine (C) > thy mine (T) in aqueous solutions, although the positions of C and T seem to be interchangeable. The same trend is found with the nucleosides. Interaction energies of the A-T and G-C pairs are somewhere between those of the constituent bases. Theoretical calculations including van der Wools interaction and solvation energies give the trend G > A similar to T > C. The magnitudes of the interaction energies of the nucleobases with graphene are similar to those found with single-walled carbon nonotubes.
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