Ion transfer mechanism

The existence of chain transfer in the polymerization of the n-butenes and of propene has also been shown [19], and for the last named a hydride ion transfer mechanism has been proposed, which yields branched chains [9]. 

The MC-ICP-MS consists of four main parts 1) a sample introduction system that inlets the sample into the instrument as either a liquid (most common), gas, or solid (e.g., laser ablation), 2) an inductively coupled Ar plasma in which the sample is evaporated, vaporized, atomized, and ionized, 3) an ion transfer mechanism (the mass spectrometer interface) that separates the atmospheric pressure of the plasma from the vacuum of the analyzer, and 4) a mass analyzer that deals with the ion kinetic energy spread and produces a mass spectrum with flat topped peaks suitable for isotope ratio measurements. 

Terrace Ion-Transfer Mechanism, In the terrace siteion-transfer mechanism a metal ion is transferred from the solution (OHP) to the flat face of the terrace region (Fig. 6.15). At this position the metal ion is in the adion (adsorbed-like) state, having most of its water of hydration. It is weakly bound to the crystal lattice. From this position it diffuses on the surface, seeking a position of lower energy. The final position is a kink site. 

Step-Edge Ion-Transfer Mechanism. The step-edge site ion transfer, or direct transfer mechanism, is illustrated in Figure 6.14. It shows that in this mechanism ion transfer from the solution (OHP) takes place on a kink site of a step edge or on any other site on the step edge. In both cases the result of the ion transfer is a M adion in the metal crystal lattice. In the first case, a direct transfer to the kink site, the M adion is in the half-crystal position, where it is bonded to the crystal lattice... 

Due to its radically different design, the latest hybrid linear ion trap FTMS instrument, the LTQ-Orbitrap (Fig. 5.6), does not suffer from the time-of-flight effect. In this instrument, the superconducting magnet and the ICR cell are replaced by an electrostatic trap (C-trap) and so distances traveled by the ions from one MS device to the other are much smaller in addition a radically different ion transfer mechanism virtually eliminates any possibility for a time-of-flight effect (Makarov,... 

Figure 10 shows a schematic drawing of the ion transfer mechanism in the CMS 47 with external ionization. Figure 11a... 

Comparing the cation-exchange reaction (Eq. (21)) with the ion-transfer mechanism... 

The IR spectra of GLY adsorbed on the strong-acid cation-exchange resin in the Na -ion form were also measured. It was found that the IR spectrum of sample prepared from aqueous solution at pH = 1.48 also exhibit the bands at 1752 and 1600 cm, while the spectra of samples prepared from aqueous solutions of GLY concentrations 0.1 and 1.0 mol L at pH = pi only exhibit the band assigned to the carboxydate ion, and do not exhibit the band assigned to the un-ionized carboxjd. The ion-transfer mechanism is thus supported by the IR spectra. 

This paper describes the development and performance of a 16 mol% ceria stabilised zirconia supported palladium-zinc catalyst in vehicle exhaust after treatment. The main aspects of the novel catalytic system are i) the low temperature preparation of a thermally stable solid solution of tetragonal phase ceria stabilised zirconia, ii) the role of zinc in the dispersion of the palladium component and its synergetic interaction with palladium in an oxygen ion transfer mechanism, iii) the in situ perfomance of the catalyst under close-coupled engine conditions in producing... 

Randriamahazaka, H., Plesse, C., Teyssie, D., and Chevrot, C. (2004). Ions transfer mechanisms during the electrochemical oxidation of poly(3,4-ethylenedioxythiophene) in l-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)amide ionic liquid, Electrochem. Commun., 6, pp. 299-305. 

Figure 8.30. (a) Schematic model of ion transfer mechanism (b) results from Ref 48. 

In this way both the acidic and the basic function is independent of an ion-transfer mechanism and independent from a solvent. In fact it covers all reactions considered in coordination chemistry. The terms Lewis acid and Lewis base are applied mainly in the field of organic chemistry. 

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