Molecular machines based on metal ion translocation.
Transition metal ions can be moved reversibly between the two coordinatively unequivalent compartments A and B of a ditopic ligand, using as an input the variation of a bulk solution parameter, either pH or redox potential. In a redox-driven translocation, the metal moves reversibly from A to B on cycling between two consecutive oxidation states (e.g., Cu(II)/Cu(I); Fe(III)/Fe(II)) by means of auxiliary oxidation and reduction reactions. In a pH-driven process, one compartment displays also acid-base properties (AH(n)() left arrow over right arrow A(n)(-) + nH(+)), and the M(n)(+) ion is translocated between B and A(n)(-) through consecutive addition of base and acid.
Amendola
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Dipartimento di Chimica Generale, Università di Pavia, via Taramelli 12, I-27100 Pavia, Italy.
Fabbrizzi
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Mangano
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Pallavicini
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D019216:Metals, Heavy / Q000737:chemistry*; D008958:Models, Molecular; D020409:Molecular Motor Proteins / Q000737:chemistry*; D009038:Motion; D009942:Organometallic Compounds / Q000737:chemistry; D010084:Oxidation-Reduction
D019216:Metals, Heavy; D020409:Molecular Motor Proteins; D009942:Organometallic Compounds