title: Synthesis, characterization, and optical properties of 4H-pyran-4-ylidene donor-based chromophores: the relevance of the location of a thiophene ring in the spacer.
abstract: A series of new 4H-pyran-4-ylidene donor-based chromophores with a thiophene ring in the spacer has been synthesized. The linear and nonlinear optical (NLO) properties of these compounds have been determined and compared with the results of computational calculations. The position of the thiophene ring proved essential to optimize the figure of merit μβ, with the best results obtained when the heterocyclic system was closer to the donor moiety.
authors.affiliation: Departamento de Química Orgánica, ICMA, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain.
authors.forename: Natalia
authors.initials: N
authors.lastname: Martínez de Baroja
authors.forename: Javier
authors.initials: J
authors.lastname: Garín
authors.forename: Jesús
authors.initials: J
authors.lastname: Orduna
authors.forename: Raquel
authors.initials: R
authors.lastname: Andreu
authors.forename: María Jesús
authors.initials: MJ
authors.lastname: Blesa
authors.forename: Belén
authors.initials: B
authors.lastname: Villacampa
authors.forename: Raquel
authors.initials: R
authors.lastname: Alicante
authors.forename: Santiago
authors.initials: S
authors.lastname: Franco