133080-87-2Relevant articles and documents
Hydroxy-terminated organic semiconductor-based field-effect transistors for phosphonate vapor detection
Huang, Jia,Miragliotta, Joseph,Becknell, Alan,Katz, Howard E.
, p. 9366 - 9376 (2007)
Organic field-effect transistors (OFETs) with a hydroxy-functionalized semiconductor incorporated into a receptor layer were fabricated and shown to respond strongly to the analyte dimethyl methylphosphonate (DMMP) that simulates phosphonate nerve agents.
Polymer-Supported Chiral-at-Metal Lewis Acid Catalysts
Larionov, Vladimir A.,Cruchter, Thomas,Mietke, Thomas,Meggers, Eric
, p. 1457 - 1460 (2017)
The covalent immobilization of a chiral-at-metal bis-cyclometalated iridium(III) catalyst on a solid support is reported, and its catalytic activity has been investigated. As a catalyst immobilization strategy, a catalyst precursor was tethered to polystyrene macrobeads through an ester or amide linkage and subsequently converted to the immobilized active chiral Lewis acid by treatment with a Br?nsted acid. The amide-linked catalyst displays high robustness and can be recycled multiple times without deterioration of enantioselectivity and only a gradual loss of catalytic activity. Chiral Lewis acid activity was demonstrated as an example for the enantioselective Friedel-Crafts alkylation of indole with an α,β-unsaturated 2-acyl imidazole and for the enantioselective Diels-Alder reactions of an α,β-unsaturated 2-acyl imidazole with 2,3-dihydrofuran or isoprene.
Molecular ordering in bis(phenylenyl)bithiophenes
Stokes, Melissa A.,Kortan, Refik,Amy, Sandrine Rivillon,Katz, Howard E.,Chabal, Yves J.,Kloc, Christian,Siegrist, Theo
, p. 3427 - 3432 (2008/09/21)
The crystal structure of phenylene-bithiophene oligomers (PTTP) has been investigated by powder X-ray diffraction measurements and ab initio Monte Carlo modelling. Two new hydroxyl-terminated PTTP powders, 5,5′-bis-4-(6- hydroxyhexyloxy)-phenyl-2,2′-bithi
Alternating oligo(p-phenylene vinylene)-perylene bisimide copolymers: Synthesis, photophysics, and photovoltaic properties of a new class of donor-acceptor materials
Neuteboom, Edda E.,Meskers, Stefan C. J.,Van Hal, Paul A.,Van Duren, Jeroen K. J.,Meijer,Janssen, Rene A. J.,Dupin, Helene,Pourtois, Geoffrey,Cornil, Jerome,Lazzaroni, Roberto,Bredas, Jean-Luc,Beljonne, David
, p. 8625 - 8638 (2007/10/03)
A Suzuki polycondensation reaction has been used to synthesize two copolymers consisting of alternating oligo(p-phenylene vinylene) (OPV) donor and perylene bisimide (PERY) acceptor chromophores. The copolymers differ by the length of the saturated spacer that connects the OPV and PERY units. Photoinduced singlet energy transfer and photoinduced charge separation in these polychromophores have been studied in solution and in the solid state via photoluminescence and femtosecond pump-probe spectroscopy. In both polymers a photoinduced electron transfer occurs within a few picoseconds after excitation of the OPV or the PERY chromophore. The electron transfer from OPV excited state competes with a singlet energy transfer state to the PERY chromophore. The differences in rate constants for the electron- and energy-transfer processes are discussed on the basis of correlated quantum-chemical calculations and in terms of conformational preferences and folding of the two polymers. In solution, the lifetime of the charge-separated state is longer than in the films where geminate recombination is much faster. However, in the films some charges are able to escape from geminate recombination and diffuse away and can be collected at the electrodes when the polymers are incorporated in a photovoltaic device.
POLYMERIZABLE COMPOSITION SHOWING LIQUID-CRYSTAL PHASE AND OPTICALLY ANISOTROPIC OBJECT MADE WITH THE SAME
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Page 77, (2008/06/13)
An object of the present invention is to provide a polymerizable liquid crystal composition incorporating a polymerizable liquid crystal compound which displays a low nematic phase temperature, displays excellent compatibility with other polymerizable liquid crystal compounds, and furthermore yields a product following polymerization, of good transparency and high mechanical strength. A polymerizable composition is provided which displays a liquid crystal phase, and moreover incorporates a liquid crystal backbone with two or more ring structures and a compound with a partial structure represented by the general formulaP-S-A-D-E- [wherein P1 represents a polymerizable functional group; S1 represents -(CH2)w-, - O(CH2)w-, -(CH2)wO-, -(CH2)wC(=O)O-, -(CH2)wOC(=O)-, -C(=O)O(CH2)w- or - OC(=O)(CH2)w- (w: 1 to 20); A1 and E1 each represent a hydrocarbon ring or a hetero ring, although E1 is a ring incorporated within the liquid crystal backbone; and D1 represents - C(=O)-O-(CH2)m-O-, -O(CH2)m-O-C(=O)-, -O-C(=O)-(CH2)m-O-, or -O(CH2)m-C(=O)-O- (m: 1 to 15)].
Synthesis and Characterization of Side-Chain Liquid Crystalline Polymethacrylates Containing Fluorinated Diphenyldiacetylene Side-Groups
Lu, Y.-H.,Tsay, K.-T.,Hsu, C.-S.,Chang, H.-L.
, p. 85 - 98 (2007/10/02)
The synthesis of four side-chai liquid crystalline polymethacrylates containing either 4-alkanyloxy-4'-fluorodiphenydiacetylenes or 4-alkanyloxy-3',4'-difluorodiphenyldiacetylenes side groups is presented.The phase behavior of both monomeric and polymeric
