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Phenylene-ethynylene

Optically active polymers, 473, 479-480 synthesis of, 509 Optically active poly(phenylene-ethynylene), synthesis of,... [Pg.590]

Grignard chemistry was used as an alternative to hydroboration reaction by the Chujo team in its search for new n-type conjugated polymers for utilization in polymer energy storage systems. By this route, the syntheses of 7r-conjugated poly(p-phenylene-boranes) (15)35 (Fig. 12) and poly(ethynylene-phenylene-ethynylene-borane)s were reported.36... [Pg.28]

Figure 89 The motorized nanocar structure (172) that contains a light-activated unidirectional molecular motor and an oligo(phenylene ethynylene) chassis and axle system with four carboranes to serve as the wheels. (Adapted from ref. 168.)... [Pg.88]

Poly(ethynylene-p-phenylene-ethynylene-borane)s were also prepared by polycondensations of bifunctional lithium acetylides and aryldimethoxyborane, as shown in scheme 35.61 The polymerization between dilithium 2,5-didodecyloxybenzene-1,4-diethynilide and tripyldimethoxyborane gave the corresponding polymer in 67%... [Pg.158]

Polymeric (isocyanide)gold(i) aryls ( gold oligo-phenylene-ethynylene-isonitriles ) were tested as electrical conductors at metal-molecule-metal junctions (7r-conjugated molecular wires), but the preparation, structure, and properties of the materials were not fully disclosed (Scheme 52).218... [Pg.283]

Xiao X, Nagahara LA, Rawlett AM, Tao N (2005) Electrochemical gate-controlled conductance of single oligo(phenylene ethynylene)s. J Am Chem Soc 127 9235-9240... [Pg.81]

Apolar m-phenylene ethynylene oligomers 77 fold in apolar solvents, such as alkanes, into helices.117 Due to the strongly favored arene-arene interactions in this solvent type, the folding into a helical oligomer coincides with stacking of the folded oligomers into helical columnar polymers and a strong... [Pg.417]

Figure 3. Solution phase synthesis of the oligo(phenylene ethynylene)s by the divergent/convergent doubling approach. Figure 3. Solution phase synthesis of the oligo(phenylene ethynylene)s by the divergent/convergent doubling approach.
Figure 4. (Phenylene ethynylene)-based conjugated oligomers prepared in solution using a bi-direction growth approach with in situ deprotection and coupling. Figure 4. (Phenylene ethynylene)-based conjugated oligomers prepared in solution using a bi-direction growth approach with in situ deprotection and coupling.
L. Jones II, J. S. Schumm, J. M. Tour, Rapid Solution and Solid Phase Syntheses of Oiigo(l,4-phenylene-ethynylene)s With Thioester Termini Molecular Scale Wires With Alligator Clips. Derivation of Iterative Reaction Efficiencies on a Polymer Support, J. Org. Chem. 1997, 62,1388-1410. [Pg.252]

S. Huang, J. M. Tour, Rapid Bi-directional Synthesis of 01igo(l,4-phenylene ethynylene)s, Tetrahedron Lett. 1999, 40, 3347-3350. [Pg.252]

Several groups have studied introduction of phenylene ethynylene units into PPV backbones. The first material of this type, copolymer 163, was reported by Bunz and coworkers [193] (Chart 2.36). The material displayed blue luminescence in solution (A ax = 460 nm), but due to the polymer s rigid-rod structure, very strong aggregation in the solid state gave rise to... [Pg.91]

An interesting example of extremely long monodisperse phenylene ethynylene wires ... [Pg.225]

The EL of poly(o-phenylene ethynylene) 522 was reported by Onoda and coworkers [637], As expected, the optical band gap of 522 (3.1 eV) is larger than that of para-connected polymer 516, making the former a blue-purple-emitting material (APL = 400). Interestingly,... [Pg.225]

D.A.M. Egbe, S. Sell, C. Ulbricht, E. Birckner, and U.-W. Grummt, Mixed alkyl- and alkoxy-substituted poly[(phenylene ethynylene)-a/t-(phenylene vinylene)] hybrid polymers synthesis and photophysical properties, Macromol. Chem. Phys., 205 2105-2115, 2004. [Pg.269]

C. Schmitz, P. Posch, M. Thelekkat, H.-W. Schmidt, A. Montali, K. Feldman, P. Smith, and C. Weder, Polymeric light-emitting diodes based on poly(p-phenylene ethynylene), poly(triphenyldia-mine), and spiroquinoxaline, Adv. Fund. Mater., 11 41 46, 2001. [Pg.289]

C. Tan, M.R. Pinto, and K.S. Schanze, Photophysics, aggregation and amplified quenching of a water-soluble poly(phenylene ethynylene), Chem. Commun. 446-447, 2002. [Pg.289]

K. Yoshino, K. Tada, and M. Onoda, Optical properties of poly(3,4-dialky 1-1,6-phenylene ethynylene), Jpn. J. Appl. Phys., 33 L1785-L1788, 1994. [Pg.289]

I Moggio, J Le Moigne, E Arias-Marin, D Issautier, A Thierry, D Comoretto, G Dellepiane, and C Cuniberti, Orientation of polydiacetylene and polyfp-phenylene ethynylene) films by epitaxy and rubbing, Macromolecules, 34 7091-7099, 2001. [Pg.477]

E Arias, T Maillou, I Moggio, D Guillon, J Le Moigne, and B Geffroy, Amphiphilic phenylene-ethynylene polymers and oligomers for polarized electroluminescence, Synth. Met., 127 229-231, 2002. [Pg.478]

DiCesare N, Pinto MR, Schanze KS, Lakowicz JR (2002) Saccharide detection based on the amplified fluorescence quenching of a water-soluble poly(phenylene ethynylene) by a boronic acid functionalized benzyl viologen derivative. Langmuir 18 7785-7787... [Pg.387]

Pinto MR, Rristal BM, Schanze KS (2003) A water-soluble poly(phenylene ethynylene) with pendant phosphonate groups. Synthesis, photophysics, and layer-by-layer self-assembled films. Langmuir 19 6523-6533... [Pg.387]

Zheng J, Swager TM (2004) Biotinylated poly(p-phenylene ethynylene) unexpected energy transfer results in the detection of biological analytes. Chem Commun 2798-2799... [Pg.388]


See other pages where Phenylene-ethynylene is mentioned: [Pg.86]    [Pg.242]    [Pg.241]    [Pg.167]    [Pg.81]    [Pg.416]    [Pg.409]    [Pg.211]    [Pg.223]    [Pg.225]    [Pg.225]    [Pg.289]    [Pg.464]    [Pg.473]    [Pg.477]    [Pg.479]    [Pg.254]    [Pg.83]    [Pg.419]    [Pg.437]   


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Electron phenylene-ethynylene

Ethynylene

Ethynylenes

Phenylene ethynylene foldamers

Phenylene ethynylene oligomer

Phenylene ethynylene oligomers

Phenylene-ethynylene macrocycles

Poly(Phenylene Ethynylene)s

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