prov:value
| - (i) reacting a mixture containing a source of silica and an organosilane compound of the formula wherein R1, R2, and R3 are the same and are a hydrolyzable group selected from the group consisting of C1-C10 alkoxy, aryloxy, and halide, and X is an organic moiety is selected from the group consisting of C1-C20 alkyl, C2-C10 alkenyl, C2-C20 alkynyl, cycloalkyl, cycloalkenyl, aryl, and heteroaryl, ea
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