Expanded ligands: bis(2,2′:6′,2″-terpyridine carboxylic acid)ruthenium(ii) complexes as metallosupramolecular analogues of dicarboxylic acids†
Abstract
Ligands in which multiple metal-binding domains are linked by a metal-containing moiety rather than a conventional organic group are described as “expanded ligands”. The use of 4,4′-difunctionalised {Ru(tpy)2} units provides a linear spacer between metal-binding domains and we have extended this motif to expanded ligands containing two