کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5372189 1388866 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ion hydration in nanopores and the molecular basis of selectivity
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Ion hydration in nanopores and the molecular basis of selectivity
چکیده انگلیسی

Using a simple model, it is shown that the cost of constraining a hydrated potassium ion inside a narrow pore is smaller than the cost of constraining hydrated sodium or lithium ions in pores of radius around 1.5 Å. The opposite is true for pores of radius around 2.5 Å. The reason for the selectivity in the first region is that the potassium ion allows for a greater distortion of its hydration shell and can therefore maintain a better coordination, and the reason for the reverse selectivity in the second region is that the smaller ions retain their hydration shells in these pores. This is relevant to the molecular basis of ion selective channels, and since this mechanism does not depend on the molecular details of the pore, it could also operate in all sorts of nanotubes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biophysical Chemistry - Volume 124, Issue 3, 1 December 2006, Pages 243-250
نویسندگان
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