Dry Sol–Gel Condensation of p-X-C6H4SiH3 (X=H, CH3, CH3O, F, Cl) to Organosilica p-X-C6H4SiO3 Using Nickelocene
Abstract:The dry sol–gel reaction at toluene in ambient air atmosphere of p-X-C6H4SiH3 (X = H, CH3, CH3O, F, Cl) to p-C6H4SiO3 in high yield, catalyzed by nickelocene, is reported. The highest yield, molecular weight, polydispersity index, and TGA residue yield were obtained for p-Cl-C6H4SiH3. Some degree of unreacted Si–H bonds still remained in the gel because of steric reason. All the insoluble gels adopt an amorphous structure with a smooth surface. A plausible mechanism for the dry sol–gel reaction was suggested.
Document Type: Research Article
Publication date: 2006-11-01
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