TY - JOUR
T1 - Attractive interaction between macroanions mediated by multivalent cations in biological fluids
AU - Fujihara, Shingo
AU - Akiyama, Ryo
N1 - Funding Information:
The authors thank Prof. A. Yoshimori for his comment. We thank also Prof. Kinoshita for his comments and use of the software. This work was supported by grants from the Japanese Ministry of Education, Science, Sports and Culture (No. 20118007 ), and the Joint Studies Program of the Institute for Molecular Science .
Publisher Copyright:
© 2014 Elsevier BV. All rights reserved.
PY - 2014/12
Y1 - 2014/12
N2 - Attractive interaction between macroanions mediated by divalent cations is studied using an Ornstein-Zernike equation with hypernetted-chain closure. The calculated results indicate that the divalent cations mediate the strong attraction and that this attractive force is much stronger than that mediated by monovalent cations. In this article, we shed light on effects of the co-existing of monovalent cations because the attractive interaction mediated by multivalent cations is observed in various biological fluids that also contain monovalent cations. When the system also contains monovalent cations, they suppress the attraction mediated by the divalent cations. However, the attraction remains and the reentrant behavior of attraction appears due to the exchange of attraction-mediating divalent cations for monovalent cations if the charge of the macroanions is sufficiently large.
AB - Attractive interaction between macroanions mediated by divalent cations is studied using an Ornstein-Zernike equation with hypernetted-chain closure. The calculated results indicate that the divalent cations mediate the strong attraction and that this attractive force is much stronger than that mediated by monovalent cations. In this article, we shed light on effects of the co-existing of monovalent cations because the attractive interaction mediated by multivalent cations is observed in various biological fluids that also contain monovalent cations. When the system also contains monovalent cations, they suppress the attraction mediated by the divalent cations. However, the attraction remains and the reentrant behavior of attraction appears due to the exchange of attraction-mediating divalent cations for monovalent cations if the charge of the macroanions is sufficiently large.
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U2 - 10.1016/j.molliq.2014.06.022
DO - 10.1016/j.molliq.2014.06.022
M3 - Article
AN - SCOPUS:84915782138
SN - 0167-7322
VL - 200
SP - 89
EP - 94
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
IS - PA
ER -