Experimental Charge Density Matching

Stucky s mechanism can explain more experimental results in a wide range. After improvements/151 it guides the synthesis of mesoporous inorganic materials. In fact, the initial basis of Stucky s mechanism is the charge-density-matching model based on the fact of phase transformation from lamellar phase to hexagonal phase. 

The results of Volta-potential measurements on the emersed PMPy-coated electrodes are summarized in Fig. 3.22, which presents the results at various electrode potentials derived from the preceding measurements. The increasingly positive slope indicates that the polymer assumes the state of an anion exchanger as it is oxidized. In Fig. 3.23 the expected Donnan potentials were calculated with Eqn. 18 the polaron/bipolaron density, obtained by integrating the oxidation current in Fig. 3.21, was assumed to constitute the fixed-charge density c. At the electrolyte concentration = 0.1 M, the calculated and experimental values (see Fig. 3.22) were matched, and at lower concentrations, theoretical and experimental values were plotted. The agreement can be considered quite good. Based on this analysis. Fig. 

NQR data yield primarily informations on the p electron densities in the valence shells, from which the net resulting charge on the investigated atom can be easily inferred by means of some simple models, e.g. of the TOWNES-DAILEY theory. Usually the accuracy of experimental measurements is rather high, and is at present not matched by equally powerful and accurate interpretative theories. Therefore at this initial state of application in the field of coordination chemistry we are devoting more attention to the experimental results of NQR spectroscopy, their immediate interpretation and their close connection with X-ray structural data. 

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