Abstract
A molecular dynamics investigation is conducted on the passive transport of Na+ ions through a synthetic channel in aqueous NaCl medium, the channel consisting of fourteen 15-crown-5 rings rigidly linked in a stacked configuration. The investigation studies the entry and exit of Na+ ions by applied electric fields; the Cl− ions are not admitted because of the channel’s unfavourable axial electrostatic potential for anions, and the water molecules are too large to enter. The Na+ ions exhibit damped oscillatory dynamics, for which frequencies and damping parameters are calculated, and possible applications of the system are discussed.
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