title: The synthesis and luminescence of europium (III) complex based on deprotonated 1-(4-ethyl-4H-thieno[3,2-b]indol-6-yl)-4,4,4-trifluorobutane-1,3-dionate and 1,10-phenanthroline.
abstract: A new β-diketone ligand, 1-(4-ethyl-4H-thieno[3,2-b]indol-6-yl)-4,4,4-trifluoro-butane-1,3-dione(HL) was synthesized by four steps reaction (Suzuki-Miyaura cross-coupling, Cadogan cyclization, N-ethylation and Claisen condensation reaction) from 1-(4-bromo-3-nitrophenyl)ethanone and thiophen-2-ylboronic acid. Deprotonated ligand (L(-1)) and 1,10-phenanthroline (phen) coordinated to Eu(3+) to obtain a new europium (III) complex, EuL(3)(phen). The complex was characterized by elementary analysis, IR, (1)H NMR, UV-Visible absorption spectroscopy, thermogravimetric analysis (TGA) and photoluminescence (PL) measurements in detail. TGA shows that the decomposition temperature of the complex is up to 320 °C. PL measurement results indicate that the Eu(III) complex exhibit intense red-emission with the characteristic of europium ion. Red LED device was successfully fabricated by employing the complex onto 380 nm-emitting InGaN chip, which shows that the complex can act as red phosphor in combination with 380 nm-emitting chips.
authors.affiliation: School of Chemistry Science and Technology, Zhanjiang Normal University, Zhanjiang 524048, PR China. lsgui@sohu.com
authors.forename: Sheng-Gui
authors.initials: SG
authors.lastname: Liu
authors.forename: Wen-Yi
authors.initials: WY
authors.lastname: Su
authors.forename: Rong-Kai
authors.initials: RK
authors.lastname: Pan
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Zhou
authors.forename: Xin-Lan
authors.initials: XL
authors.lastname: Wen
authors.forename: Yi-Zhao
authors.initials: YZ
authors.lastname: Chen
authors.forename: Sheng
authors.initials: S
authors.lastname: Wang
authors.forename: Xiao-Bo
authors.initials: XB
authors.lastname: Shi
mesh_terms: D002073:Butanes / Q000138:chemical synthesis / Q000737:chemistry; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D003500:Cyclization; D005063:Europium / Q000737:chemistry*; D054879:Halogenation; D007659:Ketones / Q000138:chemical synthesis / Q000737:chemistry; D008024:Ligands; D049449:Luminescence; D009682:Magnetic Resonance Spectroscopy; D010618:Phenanthrolines / Q000138:chemical synthesis / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013876:Thiophenes / Q000138:chemical synthesis / Q000737:chemistry
chemical_list: D002073:Butanes; D056831:Coordination Complexes; D007659:Ketones; D008024:Ligands; D010618:Phenanthrolines; D013876:Thiophenes; D005063:Europium; C025205:1,10-phenanthroline