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Supramolecular Copolymer from Two-component gel: Metal Ion-Mediated Cross-Linking, Enhanced Viscoelasticity and Supramolecualr Yarn

28-10-2014 | Ling Wang; Yaqing Liu; Zhaocun Shen; Tianyu Wang; Minghua Liu, Chemical Communication, 2014

The hydrogels based on the co-assembly of bolaamphiphilic L-histidine and 2,2’-bipyridine-dicarboxylic acid have been transformed into viscoelastic supramolecular polymers by cross-linking with Cu(II) ions, and macroscopic supramolecular yarns were obtained by direct drawing from the dilute ...

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Helical Polycarbodiimide Cloaking of Carbon Nanotubes Enables Inter-Nanotube Exciton Energy Transfer Modulation

24-10-2014 | Januka Budhathoki-Uprety; Prakrit V. Jena; Daniel Roxbury; Daniel A. Heller, Journal of the American Chemical Society, 2014

The use of single-walled carbon nanotubes (SWCNTs) as near-infrared optical probes and sensors require the ability to simultaneously modulate nanotube fluorescence and functionally derivatize the nanotube surface using noncovalent methods. We synthesized a small library of polycarbodiimides to ...

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Direct Arylation Polycondensation of Bithiazole Derivatives with Various Acceptors

24-10-2014 | Masahiro Kuramochi; Junpei Kuwabara; Wei Lu; Takaki Kanbara, Macromolecules, 2014

Novel π-conjugated polymers with a bithiazole unit and various acceptor units were synthesized by polycondensation via Pd-catalyzed direct arylation. The results of polycondensation reactions depend on chalcogen elements in the monomers. The presence of a Se atom inhibited polymerization, ...

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ROMP synthesis of novel thermo‐, pH‐, and salt‐responsive (co)polymers containing the morpholino functional group

21-10-2014 | Johannes A. Hensbergen, Sylvia Ganda, Peter J. Roth, Robert P. Burford, Andrew B. Lowe, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT We report the ring‐opening metathesis polymerization (ROMP) synthesis of novel (co)polymers containing the multiresponsive morpholino functional group [(3aR,7aS)−2‐(2‐morpholinoethyl)−3a,4,7,7a‐tetrahydro‐1H−4,7‐epoxyisoindole‐1,3(2H)‐dione (M1)]. All (co)polymers were prepared with ...

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Using controlled radical polymerization to confirm the lower critical solution temperature of an N‐(alkoxyalkyl) acrylamide polymer in aqueous solution

21-10-2014 | Xeniya Savelyeva, Lucia Li, Milan Marić, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT N‐(3‐Methoxypropyl) acrylamide (MPAM) was polymerized by controlled radical polymerization (CRP) methods such as nitroxide‐mediated polymerization (NMP) and reversible addition–fragmentation chain‐transfer polymerization (RAFT). CRP was expected to yield well‐defined polymers with ...

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Hierarchical Structures in Thin Films of Miktoarm Star Polymers: Poly(n-hexyl isocyanate)(12K)–Poly(ε-caprolactone)1–3(5K)

21-10-2014 | Young Yong Kim; Sungmin Jung; Changsub Kim; Brian J. Ree; Daisuke Kawato; Naoki Nishikawa; Daichi Suemasa; Takuya Is ..., Macromolecules, 2014

A series of miktoarm star polymers, [poly(n-hexyl isocyanate)(12K)]–[poly(ε-caprolactone)1–3(5K)] (PHIC–PCL1–3) (composed of a rigid self-assembling PHIC arm and one to three flexible crystallizable PCL arms), were investigated to examine the polymers’ thermal properties and nanoscale thin film ...

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Poly(ferulic acid-co-tyrosine): Effect of the Regiochemistry on the Photophysical and Physical Properties en Route to Biomedical Applications

14-10-2014 | Amandine Noel; Yannick P. Borguet; Jeffery E. Raymond; Karen L. Wooley, Macromolecules, 2014

The photophysical and mechanical properties of novel poly(carbonate-amide)s derived from two biorenewable resources, ferulic acid (FA) and l-tyrosine ethyl ester, were evaluated in detail. From these two bio-based precursors, a series of four monomers were generated (having amide and/or carbonate ...

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Coloring: Coloring of Polystyrene Nanoparticles Assembling on Graphene in Aqueous Solution (Part. Part. Syst. Charact. 10/2014)

13-10-2014 | Jun Dong, Qing Yang, Jian Weng, Particle & Particle Systems Characterization, 2014

Solution photonic crystals can be prepared by assembling polystyrene nanoparticles on graphene functionalized with hydrophilic polymers, as J. Dong and co‐workers report on page 1072. The solution photonic crystal can be stably dispersed in water and can change from blue to white very quickly ...

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Syntheses, crystal structures and antioxidant study of Zn(II) complexes with morin-5′-sulfonic acid (MSA)

12-10-2014 | Author(s): Elżbieta Pieniążek , Jan Kalembkiewicz , Maciej Dranka , Elżbieta Woźnicka, Journal of Inorganic Biochemistry, 2014

Publication date: December 2014 Source:Journal of Inorganic Biochemistry, Volume 141 Author(s): Elżbieta Pieniążek , Jan Kalembkiewicz , Maciej Dranka , Elżbieta Woźnicka The study of modified synthetic procedure of water soluble morin-5′-sulfonic acid sodium salt (NaMSA) involving less ...

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Supramolecular Fullerene Polymers and Networks Directed by Molecular Recognition between Calix[5]arene and C60

10-10-2014 | Takehiro Hirao, Masatoshi Tosaka, Shigeru Yamago, Takeharu Haino, Chemistry - A European Journal, 2014

Abstract A biscalix[5]arene–C60 supramolecular structure was utilized for the development of supramolecular fullerene polymers. Di‐ and tritopic hosts were developed to generate the linear and network supramolecular polymers through the complexation of a dumbbell‐shaped fullerene. The ...

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