title: Optical properties of donor-acceptor phenylene-ethynylene systems containing the 6-methylpyran-2-one group as an acceptor.
abstract: Donor-acceptor phenylene ethynylene systems containing the 6-methylpyran-2-one group, synthesized via classic or microwave-assisted Sonogashira cross-coupling, exhibit pronounced solvatochromism in fluorescence suggesting a highly polar excited state; 4-[4-(4-N,N-dihexylaminophenylethynyl)phenylethynyl]-6-methylpyran-2-one has a fluorescence quantum yield >0.9 in cyclohexane.
authors.affiliation: Department of Chemistry, University of Durham, Durham DH1 3LE, UK.
authors.forename: Jonathan C
authors.initials: JC
authors.lastname: Collings
authors.forename: Alexander C
authors.initials: AC
authors.lastname: Parsons
authors.forename: Laurent
authors.initials: L
authors.lastname: Porrès
authors.forename: Andrew
authors.initials: A
authors.lastname: Beeby
authors.forename: Andrei S
authors.initials: AS
authors.lastname: Batsanov
authors.forename: Judith A K
authors.initials: JA
authors.lastname: Howard
authors.forename: Donocadh P
authors.initials: DP
authors.lastname: Lydon
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Low
authors.forename: Ian J S
authors.initials: IJ
authors.lastname: Fairlamb
authors.forename: Todd B
authors.initials: TB
authors.lastname: Marder
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D004987:Ethers / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D009904:Optical Rotation; D010084:Oxidation-Reduction; D011753:Pyrones / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D000480:Alkynes; D004987:Ethers; D011753:Pyrones; C436384:phenyleneethynylene