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M. Wunder und P. Wenger 《Fresenius' Journal of Analytical Chemistry》1912,51(7-8):470-473
Ohne ZusammenfassungMitteilung aus dem Institut von Prof. L. Duparc, Laboratorium für analytische Chemie der Universität Genf. 相似文献
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G. Daikuhara E. Truog L. Michaelis L. T. Sharp D. R. Hoogland H. A. Noyes O. Arrhenius C. B. Lipman H. R. Christensen F. W. Parker H. Kappen A. Densch A. Rippel Th. Arnd O. Schreiner G. Loges E. Ramann F. K. Cameron R. Ulbricht W. Wolf W. Jani Biéler-Chatelan E. A. Mitscherlich C. W. Davis B. S. Davisson H. Neubauer W. Schneider Fr. Czapek G. Wunder J. K. Greisenegger K. Vorbuchner H. Niklas Hirschberger Ausschuss für Boden und Düngung des Verbandes Landwirtschaftlicher Versuchs-Stationen im Deutschen Reiche 《Analytical and bioanalytical chemistry》1924,65(6-7):273-274
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Birane Fall AbdelAziz Jalil Michael Gau Sumanth Chereddy Michael J. Zdilla Stephanie L. Wunder Parameswara Rao Chinnam 《Ionics》2018,24(2):343-349
A soft solid crystal composed of isoquinoline (IQ) and LiCl was prepared based on the concept of Pearson’s hard-soft acid-base (HSAB) theory. Single-crystal X-ray diffraction best described the isoquinoline3?(LiCl)2 as consisting of molecular Li4Cl4(isoquinoline)6 units, where the LiCl cluster is an array of edge-fused Li2Cl2 rhombs. Electrochemical impedance measurements on pressed pellets showed that conductivity occurs mainly through the bulk via a hopping mechanism, with a calculated activation energy of Ea = 67 kJ/mol. The high value of the activation energy was due to Li4Cl4 clusters that were well separated by intervening IQ ligands in the crystal structure, requiring large hops for ions to migrate through the lattice. 相似文献
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Dr. Parameswara Rao Chinnam Birane Fall Dr. Dmitriy A. Dikin AbdelAziz Jalil Clifton R. Hamilton Stephanie L. Wunder Michael J. Zdilla 《Angewandte Chemie (International ed. in English)》2016,55(49):15254-15257
The preparation and characterization of the cocrystalline solid–organic sodium ion electrolyte NaClO4(DMF)3 (DMF=dimethylformamide) is described. The crystal structure of NaClO4(DMF)3 reveals parallel channels of Na+ and ClO4? ions. Pressed pellets of microcrystalline NaClO4(DMF)3 exhibit a conductivity of 3×10?4 S cm?1 at room temperature with a low activation barrier to conduction of 25 kJ mol?1. SEM revealed thin liquid interfacial contacts between crystalline grains, which promote conductivity. The material melts gradually between 55–65 °C, but does not decompose, and upon cooling, it resolidifies as solid NaClO4(DMF)3, permitting melt casting of the electrolyte into thin films and the fabrication of cells in the liquid state and ensuring penetration of the electrolyte between the electrode active particles. 相似文献
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Motosuke Naoki Il-Hyun Park Stephanie L. Wunder Benjamin Chu 《Journal of Polymer Science.Polymer Physics》1985,23(12):2567-2578
By using a closed-circuit filtration system, we have succeeded in clarifying poly(ethylene terephthalate) (PET) dissolved in hexafluoroisopropanol (HFIP). Such static properties as the radius of gyration Rg, the weight-average molecular weight Mw, and the second virial coefficient A2 and such dynamic properties as the translational diffusion coefficient D, or its equivalent hydrodynamic radius Rh, and the second (diffusion) virial coefficient kd were determined for several PET samples of different molecular weights by using light-scattering intensity and linewidth measurements. An empirical relation between Do (or Rh) and Mw was established: Rh = (1.77±0.15)X10?2 M with Rh and Mw expressed in units of nanometers and grams per mole, respectively. The empirical exponent αD(ca. 0.58±0.01) is in good agreement with the less precisely determined intrinsic viscosity/molecular weight exponent αη (ca. 0.71±0.02). Several intensity correlation functions were measured very precisely using long accumulation times. A Laplace inversion was performed using the singular-value decomposition technique. The approximate molecular weight distribution (MWD) determined by light-scattering spectroscopy was in reasonable agreement with a completely independent determination of MWD using gel permeation chromatography (GPC). It was interesting to note, though not surprising, that GPC showed emphasis on lower-molecular-weight fractions, while light-scattering emphasized higher-molecular-weight fractions. The agreement further strengthens some complementary aspects of the two techniques. 相似文献
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M. Wunder und P. Wenger 《Fresenius' Journal of Analytical Chemistry》1914,53(6):371-374
Ohne Zusammenfassung 相似文献