203927-98-4Relevant articles and documents
Synthesis and nearly monochromatic photoluminescence properties of conjugated copolymers containing fluorene and rare earth complexes
Ling,Kang,Neoh,Huang, Wei
, p. 6995 - 7003 (2003)
A series of novel conjugated copolymers containing 9,9-dihexylfluorene and europium complex-chelated benzoate units in the main chain had been synthesized through a three-step process, involving Suzuki coupling copolymerization, hydrolysis of benzoate units, and postchelation. The chemical structures of the copolymers were characterized by FT-IR, 1H NMR, 13C NMR, GPC, and ToF-SIMS. The copolymers exhibited relatively high glass transition temperatures after incorporation of the rare earth complexes. The photoluminescence (PL) properties of the copolymer complexes in solution and in film form were investigated. Intramolecular energy transfer from the fluorene groups to the europium complex occurred in diluted solutions of the copolymer. The efficiency of this process depended strongly on the structure of the ligands for the europium complex and the composition of the copolymers. The PL spectra of the copolymer complexes consisted of two emission bands, one in the 350-550 nm region and another at around 612 nm, corresponding to the π* → π transitions of the fluorene moieties and the f-f transitions of the europium ions, respectively. In the copolymer films cast from solutions, emission from the fluorene groups could be suppressed, and the absorbed excitation energy was transferred effectively to the europium complexes in the copolymer. Nearly monochromatic red emission (with a line width of about 4 nm) was detected under UV excitation at room temperature.
New pyrimidine- and fluorene-containing oligo(arylene)s: Synthesis, crystal structures, optoelectronic properties and a theoretical study
Hughes, Gregory,Wang, Changsheng,Batsanov, Andrei S.,Fern, Michael,Frank, Stephen,Bryce, Martin R.,Perepichka, Igor F.,Monkman, Andrew P.,Lyons, Benjamin P.
, p. 3069 - 3077 (2003)
New pyrimidine containing oligo(arylene)s, notably the pyrimidine-fluorene hybrid systems 13-16, have been synthesised by Suzuki cross-coupling methodology. An efficient synthesis of the key reagent 9,9-dihexylfluorene-2,7-diboronic acid 10 from 2,7-dibro
Synthesis and Two-Photon Properties of Multi-Branched Fluorophores Composed of Ladder-Type Conjugated Cores and Functionalized Diquinoxalinylamino Peripheries
Lin, Tzu-Chau,Li, Mei-Ling,Liu, Che-Yu,Tsai, Ming-Yu,Lee, Ying-Hsuan,Febriani, Yuyun,Lin, Ja-Hon,Shen, Yu-Kai
, p. 1615 - 1621 (2015/10/05)
Two multipolar fluorophores using ladder-type oligo-(p-phenylene) units as the central π-bridges and functionalized diquinoxalinylamino moieties as the peripheral groups have been synthesized and experimentally shown to manifest strong two-photon absorpti
Multi-Functional Copolymers Comprising Rare Earth Metal Complexes and Devices Thereof
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, (2008/06/13)
The invention relates to copolymer complexes of the formula (I): wherein [Ax-[B(C)]y-Dz] denotes a single unit of the copolymer complex that is repeated n times, wherein n is an integer greater than one, and wherein the single unit comprises a conjugated backbone coordinated to a complex (C) comprising rare earth metal(s); x, y and z are numbers greater than zero such that x=y+z; A is independently selected from a group consisting of: fluorene, carbazole, oxadiazole, triphenylamine or derivatives thereof; B is a functional ligand selected from the group consisting of: benzoic acid, 1,3-diphenylpropane-1,3-dione, 1,10-phenanthroline, 2,2-bipyridine, or derivatives thereof; and D is independently selected from a group consisting of: fluorene, carbazole, oxadiazole, triphenylamine or derivatives thereof.
