Gutmann Donor and Acceptor Numbers for Ionic Liquids
作者:Matthias Schmeisser、Peter Illner、Ralph Puchta、Achim Zahl、Rudi van Eldik
DOI:10.1002/chem.201200584
日期:2012.8.27
We present for the first time Gutmanndonor and acceptornumbers for a series of 36 different ionicliquids that include 26 distinct anions. The donornumbers were obtained by 23Na NMR spectroscopy and show a strong dependence on the anionic component of the ionicliquid. The donornumbers measured vary from −12.3 kcal mol−1 for the ionicliquid containing the weakest coordinative anion [emim][FAP]
Thermodynamic and molecular origin of interfacial rate enhancements and endo-selectivities of a Diels–Alder reaction
作者:Vijay Beniwal、Anil Kumar
DOI:10.1039/c6cp07405g
日期:——
Diels–Alder reaction between cyclopentadiene and methyl acrylate at ionic liquid/n-hexane interfaces. This study describes, for the first time, a methodology for the calculation of the activation parameters of an interfacial reaction. It has been seen that the energy of activation for an interfacial reaction is much smaller than that of the corresponding homogeneous reaction, resulting into the large rate acceleration
Polymer and macromolecular solid electrolyte containing the same
申请人:Nippon Shokubai Co., Ltd.
公开号:EP1113035A2
公开(公告)日:2001-07-04
This invention is to provide a macromolecular solid electrolyte exhibiting high ion conductivity even at low temperatures and a polymer used therefor. This invention relates to a polymer formed of structural units represented by the following formula (1):
wherein R represents a linear or branched alkylene residue of 1 to 4 carbon atoms; X- represents a deprotonated residue of an acid; Y+ represents a cation of a nitrogen-containing compound; z represents a residue of a monoethylenically unsaturated compound; m represents a number of average addition mols of a branched chain bound to the structural unit, -(RO)-, forming a main chain and is in the range of 2 to 20; n is in the range of 3 to 500; and p is in the range of 0 to 2, and macromolecular solid electrolyte comprising the polymer as an essential component.
Coordination of Terpyridine to Li<sup>+</sup> in Two Different Ionic Liquids
作者:Klaus Pokorny、Matthias Schmeisser、Frank Hampel、Achim Zahl、Ralph Puchta、Rudi van Eldik
DOI:10.1021/ic4020724
日期:2013.11.18
On the basis of Li-7 NMR experiments, the complex-formation reaction between Li+ and the tridentate N-donor ligand terpyridine was studied in the ionic liquids [emim][NTf2] and [emim][ClO4] as solvents. For both ionic liquids, the NMR data implicate the formation of [Li(terpy)(2)](+). Density functional theory calculations show that partial coordination of terpyridine involving the coordination of a solvent anion can be excluded. In contrast to the studies in solution, X-ray diffraction measurements led to completely different results. In the case of [emim] [NTf2], the polymeric lithium species [Li(terpy)(NTf2)] was found to control the stacking of this complex, whereas crystals grown from [emim][ClO4] exhibit the discrete dimeric species [Li(terpy)(ClO4)](2). However, both structures indicate that each lithium ion is formally coordinated by one terpy molecule and one solvent anion in the solid state, suggesting that charge neutralization and pi stacking mainly control the crystallization process.