Synthesis, structure, and luminescence properties of arylpyridine-substituted terpyridine Zn(II) and Cd(II) complexes

Functionalised Terpyridines and Their Metal Complexes—Solid-State Interactions

Analysis of the weak interactions within the crystal structures of 33 complexes of various 4′-aromatic derivatives of 2,2′:6′,2″-terpyridine (tpy) shows that interactions that exceed dispersion are dominated, as expected, by cation⋯anion contacts but are associated with both ligand–ligand and ligand–solvent contacts, sometimes multicentred, in generally complicated arrays, probably largely determined by dispersion interactions between stacked aromatic units. With V(V) as the coordinating cation, there is evidence that the polarisation of the ligand results in an interaction exceeding dispersion at a carbon bound to nitrogen with oxygen or fluorine, an interaction unseen in the structures of M(II) (M = Fe, Co, Ni, Cu, Zn, Ru and Cd) complexes, except when 1,2,3-trimethoxyphenyl substituents are present in the 4′-tpy.

The exchangeable self-assembly behaviour of bis-pseudorotaxanes with metallo-bisviologens (CH3PyTpyFeTpyPyCH34+) and crown ether (Tpy = 2,2′:6′,2′′-terpyridine)

Two different terpyridine chelated Fe²⁺ complexes which contain two methyl-pyridinium salts could be self-assembled with dibenzo-24-crown-8 ether to generate exchangeable double metallo-pseudorotaxanes.