Journal of Colloid and Interface Science 2002-06-01

Condensation of nucleobases at mercury/aqueous solution interface--a structural perspective using hydrogen bonding considerations.

S Harinipriya, M V Sangaranarayanan

Index: J. Colloid. Interface Sci. 250(1) , 201-12, (2002)

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Abstract

The two-dimensional condensation behavior exhibited by nucleobases at a mercury/aqueous solution interface is analyzed on the basis of their hydrogen-bonded quadruplex structures, and the experimentally observed critical temperatures are rationalized incorporating different types of hydrogen bonding, surface coordination effects, and stacking considerations. The proposed methodology provides a structural basis for the interpretation of critical temperatures and enables the calculation of the same pertaining to different modified nucleobases. The applicability of the procedure to order-disorder transitions of water dipoles at Hg electrodes is also indicated.