title: Evidence of enhanced conjugation in ortho-arylene ethynylenes with transition metal coordination.
abstract: The effective conjugation of ortho and ortho-alt-para-arylene ethynylenes, with appropriately positioned pyridine and pyrazine heterocycles, increases upon binding to Ag(I) and Pd(II) cations. Significant bathochromic shifts in the electronic spectra, witnessed upon introduction of these metal bridges, are consistent with enhanced electron delocalization in the unsaturated backbone. Control studies suggest that this electronic behavior is attributable exclusively (in the case of Ag(I)) or partially (in the case of Pd(II)) to conformational restrictions of the conjugated backbones.
authors.affiliation: Department of Chemistry, University of Wisconsin-Stevens Point, 2001 Fourth Avenue, Stevens Point, Wisconsin 54481, USA.
authors.forename: Qianwei
authors.initials: Q
authors.lastname: Ren
authors.forename: Cole G
authors.initials: CG
authors.lastname: Reedy
authors.forename: Eric A
authors.initials: EA
authors.lastname: Terrell
authors.forename: Joshua M
authors.initials: JM
authors.lastname: Wieting
authors.forename: Robert W
authors.initials: RW
authors.lastname: Wagie
authors.forename: Jake P
authors.initials: JP
authors.lastname: Asplin
authors.forename: Leah M
authors.initials: LM
authors.lastname: Doyle
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Long
authors.forename: Michael T
authors.initials: MT
authors.lastname: Everard
authors.forename: Jon S
authors.initials: JS
authors.lastname: Sauer
authors.forename: Cassandra E
authors.initials: CE
authors.lastname: Baumgart
authors.forename: Jason S
authors.initials: JS
authors.lastname: D'Acchioli
authors.forename: Nathan P
authors.initials: NP
authors.lastname: Bowling
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D010165:Palladium / Q000737:chemistry*; D011719:Pyrazines / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry; D012834:Silver / Q000737:chemistry*
chemical_list: D000480:Alkynes; D009942:Organometallic Compounds; D011719:Pyrazines; D011725:Pyridines; D012834:Silver; D010165:Palladium