| Autor: |
Smirnova, N. P., Eremenko, A. M., Gastilovich, E. A., Michailova, K. V., Chuiko, A. A. |
| Zdroj: |
Research on Chemical Intermediates; January 1997, Vol. 23 Issue: 1 p49-53, 5p |
| Abstrakt: |
Adsorption of TOAQ on the surface of porous (silica gel) and non-porous (aerosil) silica modification does not cause rupture of intramolecular hydrogen bonds (IMHB). The fine structure spectra of TOAQ fluorescence on silica gel contain a set of frequencies that are characteristic of weakly perturbed molecules. A number of new spectral effects appear due to the existence of pores and centres of a nonhydroxyl character. Hydroxyl groups of aerosil take part in formation of intermolecular hydrogen bonding with the TOAQ C=O group. The bond energy of the four OH-groups of the TOAQ molecule changes non-uniformly, and the symmetry of an equilibrium nuclear configuration of TOAQ decreases. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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