Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 52 Issue 18

Impact Factor: 3.543

ISI Journal Citation Reports © Ranking: 2012: 12/83 (Polymer Science)

Online ISSN: 1099-0518

Associated Title(s): Journal of Polymer Science Part B: Polymer Physics

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  1. Chiral sensing of Eu(III)-containing achiral polymer complex from chiral amino acids coordination induction

    Chunhui Dai, Yuxiang Wang, Yiwu Quan, Qingmin Chen, Yixiang Cheng and Chengjian Zhu

    Article first published online: 18 AUG 2014 | DOI: 10.1002/pola.27356

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    A novel β-diketonate-based Eu(III)-containing polymer complex was designed as a CD probe for direct enantioselective recognition of N-Boc-proline enantiomers. The linear regression analysis of in situ CD sensing shows a good agreement between the magnitude of molar ellipticity and concentration of chiral N-Boc-l or d-proline, indicating that this kind Eu(III)-containing achiral polymer complex can be used as a chiral-sensing probe for enantioselective recognition of N-Boc-l or d-proline enantiomers based on Cotton effect of CD spectra.

  2. Revisiting thiol-yne chemistry: Selective and efficient monoaddition for block and graft copolymer formation

    Johannes K. Sprafke, Jason M. Spruell, Kaila M. Mattson, Damien Montarnal, Alaina J. McGrath, Robert Pötzsch, Daigo Miyajima, Jerry Hu, Allegra A. Latimer, Brigitte I. Voit, Takuzo Aida and Craig J. Hawker

    Article first published online: 18 AUG 2014 | DOI: 10.1002/pola.27345

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    Polymer coupling reactions are some of the most challenging chemical transformations due to low end-group concentration, steric hindrance, and decreased reactivity. Thiol-yne chemistry is shown to be a near-quantitative and selective strategy for the coupling of pre-formed polymers to give block and graft copolymers. With aromatic alkynes under a wide range of conditions, specific mono-addition is achieved with efficiencies surpassing those of traditional thiol-ene chemistry.

  3. The pH induced vesicle to micelle morphology transition of a THP-protected polymer

    Kay E. B. Doncom, Helen Willcock and Rachel K. O'Reilly

    Article first published online: 16 AUG 2014 | DOI: 10.1002/pola.27348

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    A diblock copolymer containing a protected acid block, a permanently hydrophobic block, and a charged hydrophilic end group was synthesized by RAFT polymerization. The polymer self-assembled into vesicles in aqueous solution, directed by the hydrophilic end group, and the removal of the protecting groups yielded an amphiphilic diblock copolymer, which exists as micelles in aqueous solution. The vesicle to micelle morphology was demonstrated by DLS and TEM.

  4. Evaluation of proton conductivity of sulfonated polyimide/dihydroxy naphthalene charge-transfer complex hybrid membranes

    Liana Christiani, Sandra Hilaire, Kazunari Sasaki and Masamichi Nishihara

    Article first published online: 14 AUG 2014 | DOI: 10.1002/pola.27343

    Thumbnail image of graphical abstract

    Polymer coupling reactions are some of the most challenging chemical transformations due to low end-group concentration, steric hindrance, and decreased reactivity. Thiol-yne chemistry is shown to be a near-quantitative and selective strategy for the coupling of preformed polymers to give block and graft copolymers. With aromatic alkynes under a wide range of conditions, specific monoaddition is achieved with efficiencies surpassing those of traditional thiol-ene chemistry.

  5. Influence of linkage chemistry on folding, self-assembly, and photoresponse of amphiphilic azobenzene main chain polymers

    Zhilin Yu and Stefan Hecht

    Article first published online: 14 AUG 2014 | DOI: 10.1002/pola.27344

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    Two types of amphiphilic polymers, composed of azobenzene repeat units in the main chain connected either via ethynylene or butadiynylene linkages and carrying (chiral) oligo(ethylene glycol) side chains, have been synthesized via Sonogashira–Hagihara or Glaser polycondensation. Solvent titration experiments reveal that both polymers fold into stable helices in a polar environment. While the ethynylene-bridged polymer (PAzoE) resembles the behavior of its oligomeric counterparts, introduction of the extended diacetylene unit strengthens π,π-stacking interactions in case of the butadiynylene-bridged polymer (PAzoB), leading to a pronounced aggregation tendency and suppressing photoisomerization in the folded state.

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