Simultaneous anion and cation binding by a simple polymer-bound ureidopyridyl ligand.

A polymer-supported ligand capable of simultaneous anion and cation binding is reported along with X-ray crystallographic data showing potential binding modes.

Modular nanometer-scale structuring of gel fibres by sequential self-organization.

Ag(I) and Cu(II) complexes of a series of simple bis(urea) ligands form soft metallogels. X-ray crystallographic results suggests that the gels' structure is based on hydrogen bonding to counter anions and thus suggests a route to tunable gel rheological properties.