Intrinsic binding energy contribution

Amyes, T.L., O Donoghue, A.C., Richard, J.P. (2001) Contribution of phosphate intrinsic binding energy to the enzymatic rate acceleration for triosephosphate isomerase. J. Am. Chem Soc. 123, 11,325-11,326. 

In other words, the intrinsic binding energies of the two steps are additive but not the entropy losses [130], which means that the intrinsic binding free energy of the first step AG1 (carb) contributes to NCA stabilization. On the other hand, free energies corresponding to the overall entropy losses as-... 

Sensitivity of chemical shift analysis is determined by the spectral resolution of the XPS system. The resolution of a typical XPS system without a monochromator is 1.0 eV. This corresponds to the intrinsic line width of Al Ka or Mg Ka radiation. The analysing system contributes only little to the overall resolution. This resolution is sufficient to determine the binding energies of most core levels within 0.1 eV. Considerable improvement of the resolution down to 0.3 eV can be achieved by use of a monochromator. The higher resolution has to be paid for by a loss in intensity which, however, is no problem in modern instruments. 

The term Ed, stands for charging contributions. This term is absent in spectra of samples exhibiting a finite density of states at the Eermi level. For all practical purposes this is correct for aU true metals and for many semiconductors with intrinsic states near zero binding energy. Many systems relevant in catalysis do, however, not fulfill this condition (all non-black samples, glasses, porous materials, supports) or even worse, are composites of metallic and non-metaUic systems, giving rise to mixed metalhc-insulating behavior of their surface under PES. Such... 

Similarly, if the accommodation of B at the receptor binding site involves strain in A-B which does not occur with the binding of A alone the unfavorable enthal-pic requirement will diminish the apparent intrinsic energy contribution of B. 

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