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Polymers
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New Polymer Synthesis Reactions
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New Polymer Synthesis Reactions

A special issue of Polymers (ISSN 2073-4360).

Deadline for manuscript submissions: closed (15 January 2011) | Viewed by 20299

Special Issue Editor

Prof. Dr. Klaus Müllen

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Guest Editor
Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
Interests: new polymer-forming reactions including methods of organometallic chemistry; multi-dimensional polymers with complex shape-persistent architectures; functional polymeric networks, in particular for catalytic purposes; dyes and laser writing into polymers; chemistry and physics of single molecules; molecular materials with liquid crystalline properties for electronic and optoelectronic devices; materials for lithium or hydrogen storage; biosynthetic hybrids; nanocomposites

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Published Papers (2 papers)

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Research

19 pages, 955 KiB  
Article
Spectroscopic Investigation of Composite Polymeric and Monocrystalline Systems with Ionic Conductivity
by Darya V. Radziuk and Helmuth Möhwald
Polymers 2011, 3(2), 674-692; https://doi.org/10.3390/polym3020674 - 24 Mar 2011
Cited by 13 | Viewed by 8525
Abstract
The conductivity mechanism is studied in the LiCF3SO3-doped polyethylene oxide by monitoring the vibrations of sulfate groups and mobility of Li+ ion along the polymeric chain at different EO/Li molar ratios in the temperature range from 16 to [...] Read more.
The conductivity mechanism is studied in the LiCF3SO3-doped polyethylene oxide by monitoring the vibrations of sulfate groups and mobility of Li+ ion along the polymeric chain at different EO/Li molar ratios in the temperature range from 16 to 90 °С. At the high EO/Li ratio (i.e., 30), the intensity of bands increases and a triplet appears at 1,045 cm−1, indicating the presence of free anions, ionic pairs and aggregates. The existence of free ions in the polymeric electrolyte is also proven by the red shift of bands in Raman spectra and a band shift to the low frequency Infra-red region at 65 < T < 355 °С. Based on quantum mechanical modeling, (method MNDO/d), the energies (minimum and maximum) correspond to the most probable and stable positions of Li+ along the polymeric chain. At room temperature, Li+ ion overcomes the intermediate state (minimum energy) through non-operating transitions (maximum energy) due to permanent intrapolymeric rotations (rotation of C, H and O atoms around each other). In solid electrolyte (Li2SO4) the mobility of Li+ ions increases in the temperature range from 20 to 227 °С, yielding higher conductivity. The results of the present work can be practically applied to a wide range of compact electronic devices, which are based on polymeric or solid electrolytes. Full article
(This article belongs to the Special Issue New Polymer Synthesis Reactions)
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19 pages, 682 KiB  
Article
Reusable Polymer-Supported Terpyridine Palladium Complex for Suzuki-Miyaura, Mizoroki-Heck, Sonogashira, and Tsuji-Trost Reaction in Water
by Toshimasa Suzuka, Kosuke Kimura and Takuya Nagamine
Polymers 2011, 3(1), 621-639; https://doi.org/10.3390/polym3010621 - 14 Mar 2011
Cited by 37 | Viewed by 11014
Abstract
A novel heterogeneous transition-metal catalyst comprising a polymer-supported terpyridine palladium(II) complex was prepared and found to promote the Suzuki-Miyaura, Mizoroki-Heck, Sonogashira, and Tsuji-Trost, reactions in water under aerobic conditions with a high to excellent yield. The catalyst was recovered by simple filtration and [...] Read more.
A novel heterogeneous transition-metal catalyst comprising a polymer-supported terpyridine palladium(II) complex was prepared and found to promote the Suzuki-Miyaura, Mizoroki-Heck, Sonogashira, and Tsuji-Trost, reactions in water under aerobic conditions with a high to excellent yield. The catalyst was recovered by simple filtration and directly reused several times without loss of catalytic activity. Full article
(This article belongs to the Special Issue New Polymer Synthesis Reactions)
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