title: Neutral bis-macrocyclic nickel(II) and copper(II) complexes as π-donor receptors.
abstract: A new type of hetero- and homo-polynuclear complexes of copper(II) and nickel(II) containing 1,2,3-triazole groups in polymethylene chains have been synthesized and characterized using NMR and electrochemical methods. The triazole link facilitates the synthesis of hetero-dinuclear macrocyclic complexes. Introducing the triazole unit into the complex structure can lead to increased stability of the bis-macrocyclic system and to obtain electroactive receptors for electron-deficient molecules. Intermolecular interactions between new bis-macrocyclic donors and a chosen acceptor--7,7,8,8-tetracyanoquinodimethane (TCNQ) have been studied by voltammetry. Normal pulse voltammetry with varying initial potentials, E(i), was found to be a convenient tool to follow subtle changes of the electrochemical behavior of the redox centers due to interactions between the π-donor, bis-macrocyclic complex, and the acceptor, TCNQ molecule. The copper(II) bis-macrocyclic compound functions as a receptor able to accommodate the small organic compound in the macrocyclic cavity. This brings together transition metal ions and organic substrates within the same supramolecular structure.
authors.affiliation: Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland.
authors.forename: Iwona
authors.initials: I
authors.lastname: Mames
authors.forename: Urszula E
authors.initials: UE
authors.lastname: Wawrzyniak
authors.forename: Mateusz
authors.initials: M
authors.lastname: Woźny
authors.forename: Renata
authors.initials: R
authors.lastname: Bilewicz
authors.forename: Bohdan
authors.initials: B
authors.lastname: Korybut-Daszkiewicz
mesh_terms: D003300:Copper / Q000737:chemistry*; D047028:Macrocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D014230:Triazoles / Q000737:chemistry*
chemical_list: D047028:Macrocyclic Compounds; D009942:Organometallic Compounds; D014230:Triazoles; D003300:Copper; D009532:Nickel