title: Conjugated metallorganic macrocycles: opportunities for coordination-driven planarization of bidentate, pyridine-based ligands.
abstract: Two conjugated systems that can be constrained to planarity via metal coordination have been generated and their metal complexes studied. The potential for these architectures to be incorporated into metal-sensing arylene ethynylene/vinylene oligomers and polymers was probed by verifying that these ligands (1) bind strongly to Ag(I) and Pd(II) cations, and (2) that this event leads to complexes that are planar. Single crystal structures confirm that introduction of Ag(I) or Pd(II) cations enforces planarity in the newly formed macrocycles. Likewise, (1)H-NMR titration studies reveal stoichiometric binding of Pd(II) and strong binding of Ag(I) (K(a (Ligand 1)) = 1.3 × 10(2) M(-1); K(a (Ligand 2)) = 5.4 × 10(2) M(-1)) for each conjugated ligand.
authors.affiliation: Department of Chemistry, University of Wisconsin-Stevens Point, 2001 Fourth Avenue, Stevens Point, WI 54481, USA.
authors.forename: Danielle C
authors.initials: DC
authors.lastname: Hamm
authors.forename: Lindsey A
authors.initials: LA
authors.lastname: Braun
authors.forename: Alex N
authors.initials: AN
authors.lastname: Burazin
authors.forename: Amanda M
authors.initials: AM
authors.lastname: Gauthier
authors.forename: Kendra O
authors.initials: KO
authors.lastname: Ness
authors.forename: Casey E
authors.initials: CE
authors.lastname: Biebel
authors.forename: Jon S
authors.initials: JS
authors.lastname: Sauer
authors.forename: Robin
authors.initials: R
authors.lastname: Tanke
authors.forename: Bruce C
authors.initials: BC
authors.lastname: Noll
authors.forename: Eric
authors.initials: E
authors.lastname: Bosch
authors.forename: Nathan P
authors.initials: NP
authors.lastname: Bowling