Silica surface chemistry

Gemifloxacin, 21 224 Geminal dihydroperoxides, 13 455-456 Geminal silanol groups, 22 380, 381 silica surface chemistry and, 22 373 Geminate recombination, 14 620 Gemopatrilat, 5 159... 

Scheme 14.16 Differences between silica surface chemistry and silsesquioxane solution chemistry with Mn(-CH2-tBu)2(tmeda).

Brady, P.V., Silica surface chemistry at elevated temperatures, Geochim. Cosmochim. Acta, 56, 2941, 1992. 

Brady, P. V. 1992. Silica surface chemistry at elevated temperatures. Geochim. Cosmochim. Acta 56 2941-46. Brady, P. V., and J. V. Walther. 1989. Controls on silicate dissolution rates in neutral and basic solutions at 25°C. Geochim. Cosrrwchim. Acta 53 2823-30. 

Research of Soviet scientists is surveyed. Contributions to various aspects of the colloid chemistry of silica are examined preparation and stabilization of silica hydrosols preparation of silica gels structural characterization of silicas surface chemistry elucidation adsorption and ion-exchange property examination and geometric and chemical modification of silicas, silica coatings, and so forth. 

Currently, the definitive book on the chemistry of silica is the monograph by Ralph K. Iler (I). This book contains 350 references to publications by Soviet researchers. The books by A. V. Kiselev and coworkers (2,3), also published in the United States, are noteworthy for their description of Soviet research on silica surface chemistry and the adsorption properties of oxide adsorbents such as silica. Somewhat more attention is devoted in this chapter to the surface chemistry of amorphous silica, because this field is of special interest to me (4, 5). 

Chuiko, A.A. Gorlov, Yu.I. Silica Surface Chemistry Surface Structure, Active Sites, Sorption Mechanisms Nauk. Dumka 1992. (In Russian). 

Silica surface chemistry is mainly defined by the surface content in silanols Si—OH silanols can be isolated, O Si—OH, or geminated, 0=Si=(0H)2. They are generally highly associated by hydrogen bonds (Figure 8.3). 

Plavsic, M., Lazic, N., and Paunovic, M., Spectroscopic studies of the influence of silica surface chemistry on rubber networking, in International Conference on Fundamental and Applied Aspects of Physical Chemistry, Proceeding 501-503, Belgrade, SCG, September 2000. 

Silanols. Because of its numerous and longstanding uses in other applications, silica surface chemistry is clearly better known than that of carbon black [13]. 

Other Surface Functions. Silica surface chemistry cannot be used to determine the silanol surface content. Particularly, for silicas synthesized by precipitation, some other chemical species can modify silica s surface reactivity. 

With respect to the silica surface chemistry (see Figure 6.1) and the chemical nature of polysiloxane, the interaction sites are clearly identified since they... 

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