title: Interactions of dithiolated tetraazamacrocyclic copper(II) and nickel(II) complexes self-assembled on gold electrodes with pi-electron deficient molecules in solution.
abstract: 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 pi-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 pi-electron rich species interacting with pi-electron deficient compounds dissolved in solution, such as fluorine derivatives of tetracyanoquinodimethane (F(4)TCNQ) or a charged bismacrocyclic tetraaza complex of copper(II). The interactions of the surface immobilized macrocyclic complexes with F(4)TCNQ 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.
authors.affiliation: Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland.
authors.forename: Urszula Elzbieta
authors.initials: UE
authors.lastname: Wawrzyniak
authors.forename: Mateusz
authors.initials: M
authors.lastname: Woźny
authors.forename: Iwona
authors.initials: I
authors.lastname: Mames
authors.forename: Barbara
authors.initials: B
authors.lastname: Pałys
authors.forename: Bohdan
authors.initials: B
authors.lastname: Korybut-Daszkiewicz
authors.forename: Renata
authors.initials: R
authors.lastname: Bilewicz