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  • Title: How strongly can calcium ion influence the hydrogen-bond dynamics at complex aqueous interfaces?
    Author: Senapati S.
    Journal: J Chem Phys; 2007 May 28; 126(20):204710. PubMed ID: 17552792.
    Abstract:
    The author has performed three independent molecular dynamics computer simulations to examine the effects of counterion identity on hydrogen-bond dynamics in the enclosed water pool of anionic surfactant-based reverse micelles. The water-water hydrogen-bond lifetime in the reverse micelle (RM) with calcium ions is found to be longer than that in the RM with sodium or ammonium ions. The hydrogen bond between a polar head group and a water molecule, on the other hand, breaks but reforms most rapidly in the RM with calcium ions, indicating that there exists a strong competition between head group-counterion and head group-water interactions at such complex interfaces.
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