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Title: Assessing the solvation mechanism of C-60(OH)(24) in aqueous solution
Authors: Maciel, Cleiton
Fileti, Eudes Eterno [UNIFESP]
Rivelino, Roberto
Universidade Federal de São Paulo (UNIFESP)
Universidade Federal do ABC (UFABC)
Universidade Federal da Bahia (UFBA)
Issue Date: 9-May-2011
Publisher: Elsevier B.V.
Citation: Chemical Physics Letters. Amsterdam: Elsevier B.V., v. 507, n. 4-6, p. 244-247, 2011.
Abstract: Using molecular dynamics simulations, combined with the thermodynamic integration algorithm, we examine the hydration mechanism of C-60(OH)(24) under ambient conditions. We analyze its structural features, dynamics, and hydration free energy. Our results have been compared with a pristine fullerene aqueous system. Despite the number of hydroxyl groups in the fullerenol, its hydration entropy is rather similar to that calculated for C-60. On the other hand, we have calculated a dramatically negative free energy of about -354 kJ/mol for the fullerenol, whereas pure fullerene presents a positive value of about 59 kJ/mol. On this basis, our study indicates that the hydration of C-60(OH)(24) is guided by an enthalpy-driven process. (C) 2011 Elsevier B.V. All rights reserved.
ISSN: 0009-2614
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