title: Condensation of nucleobases at mercury/aqueous solution interface--a structural perspective using hydrogen bonding considerations.
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.
authors.affiliation: Department of Chemistry, Indian Institute of Technology, Madras, 600 036, India.
authors.forename: S
authors.initials: S
authors.lastname: Harinipriya
authors.forename: M V
authors.initials: MV
authors.lastname: Sangaranarayanan
mesh_terms: D000225:Adenine / Q000737:chemistry; D000241:Adenosine / Q000737:chemistry; D000327:Adsorption; D003596:Cytosine / Q000031:analogs & derivatives / Q000737:chemistry; D004566:Electrodes; D004573:Electrolytes; D006147:Guanine / Q000737:chemistry; D006860:Hydrogen Bonding; D008628:Mercury / Q000737:chemistry*; D011188:Potassium / Q000737:chemistry; D011687:Purines / Q000737:chemistry*; D011743:Pyrimidines / Q000737:chemistry*; D012964:Sodium / Q000737:chemistry; D012996:Solutions / Q000737:chemistry; D013816:Thermodynamics; D013889:Thiouracil / Q000737:chemistry; D013941:Thymine / Q000737:chemistry; D014498:Uracil / Q000737:chemistry; D014867:Water / Q000737:chemistry*
chemical_list: D004573:Electrolytes; D011687:Purines; D011743:Pyrimidines; D012996:Solutions; D014867:Water; C008143:5-iodocytosine; D014498:Uracil; D013889:Thiouracil; D006147:Guanine; D003596:Cytosine; D012964:Sodium; D008628:Mercury; D000225:Adenine; D000241:Adenosine; D013941:Thymine; D011188:Potassium