title: Tunable lanthanide-directed metallosupramolecular networks by exploiting coordinative flexibility through ligand stoichiometry.
abstract: We report the self-assembly of multi-component lanthanide coordination metallosupramolecular structures on a Au(111) surface. Eu atoms coordinate with two heterotypic ligands of quarterphenyl-4,4''-dicarbonitrile and 4',4''''-(1,4-phenylene)bis(2,2':6',2''-terpyridine). For carbonitrile ligand : terpyridyl stoichiometric ratios of 0.7, Eu atoms are primarily ligated in a four-fold coordination scheme. By increasing the carbonitrile ligand to reach a stoichiometry of 1.8, Eu atoms are ligated now in a five-fold coordination sphere. Two types of coordination schemes result in structures exhibiting one-dimensional and two-dimensional morphologies, respectively. This study demonstrates that the flexible lanthanide coordination sphere facilitates the rational design of metallosupramolecular architectures.
authors.affiliation: Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
authors.forename: Guoqing
authors.initials: G
authors.lastname: Lyu
authors.forename: Qiushi
authors.initials: Q
authors.lastname: Zhang
authors.forename: José I
authors.initials: JI
authors.lastname: Urgel
authors.forename: Guowen
authors.initials: G
authors.lastname: Kuang
authors.forename: Willi
authors.initials: W
authors.lastname: Auwärter
authors.forename: David
authors.initials: D
authors.lastname: Ecija
authors.forename: Johannes V
authors.initials: JV
authors.lastname: Barth
authors.forename: Nian
authors.initials: N
authors.lastname: Lin
mesh_terms: D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008024:Ligands
chemical_list: D028581:Lanthanoid Series Elements; D008024:Ligands