title: Synthesis, crystal structure and two-photon excited fluorescence properties of three aurone derivatives.
abstract: Three aurone derivatives, Z-2-[(4-N,N-dimethylaminophenyl)methylene] benzofuran-3-one (1), Z-2-[(N-ethylcarbazol-3-yl)methylene]benzofuran-3-one (2) and Z-2-[(pyren-1-yl)methylene]benzofuran-3-one (3) have been synthesized by the cyclization of 2'-hydroxychalcones. Their crystal structure, single- and two-photon related absorption and fluorescence properties have been examined. Pumped by 860 nm laser pulses in femtosecond regime, the compounds exhibit strong yellow-green two-photon excited fluorescence at 539 nm (1), 505 nm (2) and 524 nm (3) in THF with two-photon absorption (TPA) cross-section being 1536GM (1), 608GM (2) and 236GM (3).
authors.affiliation: School of Material Science and Engineering, Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, Shandong, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Ma
authors.forename: Yunhui
authors.initials: Y
authors.lastname: Sun
authors.forename: Duxia
authors.initials: D
authors.lastname: Cao
authors.forename: Huihui
authors.initials: H
authors.lastname: Chen
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Liu
authors.forename: Qi
authors.initials: Q
authors.lastname: Fang
mesh_terms: D001572:Benzofurans / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005453:Fluorescence; D008958:Models, Molecular; D017785:Photons; D013050:Spectrometry, Fluorescence
chemical_list: D001572:Benzofurans; C486837:aurone