2007年6月1日 · In the present paper, we describe 1D P 31 NMR, P 31 relaxation analysis, NOE difference spectroscopy, and pulsed-field gradient (PFG) NMR to systematically investigate the content and dynamics of hexafluorophosphate dopant ions (PF 6 −) inside the PPy films as a function of oxidation state (during the course of actuation). This approach ...

NMR Spectroscopy Primer. This page describes some of the terms and concepts commonly used in NMR spectroscopy (particularly multinuclear NMR), many of which are referred to in other pages. Quick Jump: Coupling patterns | Mutual Coupling | …

2021年9月22日 · 随着电解液中MA体积的增加，电解液中接触离子对的比例却在减小（图5e），这一现象也被 7 Li和 19 F的核磁谱图（NMR）所证实（图5c, d）。 上述结果表明，MA具有很好的解离锂盐的能力，但相对于EMC而言，MA与Li + 的作用强度却很小，这也被理论计算所证实（图5i, j ...

1993年3月15日 · In this work we investigate the nature of the PF6- ion in electrochemically prepared polypyrrole at various levels of oxidation using 19F and 31p NMR. EXPERIMENTAL Polypyrrole films were prepared from acetonitrile solutions (BDH, HPLC grade) containing 0.09M tetramethyl ammonium hexafluorophosphate* (Aldrich) and 0.1M freshly distilled pyrrole ...

The equivalent ratio of imidazolium units and PEG segments was confirmed by 1 H NMR characterization. Four different triplet peaks of CH2-X (X = N + or O) are observed at δ 3.6-4.2, as shown in...

1999年2月19日 · A complete 13 C NMR characterization of two linear low-density polyethylenes (LLDPE), one highly branched and the other lowly branched, is presented. These LLDPE were synthesized with a new catalyst: the [η 3 -methallyl-nickel-dad]PF 6 complex by homopolymerization of ethylene, using different experimental conditions.

2008年6月11日 · PGSE diffusion and 19 F, 1 H HOESY NMR studies for a series of PF 6 salts in dichloromethane are presented. The extent of the ion pairing and the relative positions of the ions are shown to depend on the structure of the salt (an example is shown here).

2007年6月1日 · In the present paper, we describe 1D P 31 NMR, P 31 relaxation analysis, NOE difference spectroscopy, and pulsed-field gradient (PFG) NMR to systematically investigate the content and dynamics of hexafluorophosphate dopant ions (PF 6 −) inside the PPy films as a function of oxidation state (during the course of actuation). This approach ...

The formation of platinum Á/diphosphine complexes of catalytic importance was investigated in [BMIM] [PF 6 ] (BMIM0/butylmethyl-imidazolium cation) ionic liquid by NMR for the first time.

2007年6月1日 · NMR is employed as a non-invasive alternative to elemental analysis for quantifying ion content, which is found to decrease linearly with decreasing electrochemical potential, directly confirming...