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Dalton Transactions

The international journal for inorganic, organometallic and bioinorganic chemistry



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Dalton Trans., 2010, 39, 730 - 735, DOI: 10.1039/b915225c

Interactions of dithiolated tetraazamacrocyclic copper(II) and nickel(II) complexes self-assembled on gold electrodes with -electron deficient molecules in solution

Urszula Elbieta Wawrzyniak, Mateusz Wony, Iwona Mames, Barbara Pays, Bohdan Korybut-Daszkiewicz and Renata Bilewicz

Self-assembled monolayers of dithiolated neutral monotetraazamacrocyclic complexes of copper(II) and nickel(II) can provide molecularly defined platforms for the formation of a pseudorotaxane-like nanostructures on the gold electrode surface. We propose these complexes as -donor building blocks for the construction of new molecular devices. We show that these perpendicularly oriented macrocyclic complexes anchored to the electrode surface act as -electron rich species interacting with -electron deficient compounds dissolved in solution, such as fluorine derivatives of tetracyanoquinodimethane (F4TCNQ) or a charged bismacrocyclic tetraaza complex of copper(II). The interactions of the surface immobilized macrocyclic complexes with F4TCNQ and with ring-shaped acceptor molecules are monitored and characterized by linear scan voltammetry. The interactions with the bismacrocyclic compound lead to a new pseudorotaxane array supported on the electrode surface and switched on and off by the application of appropriate potentials.

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