title: 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.
authors.affiliation: RD Center Kumho Tire Co., Inc., Gwangju 507-711, Korea
authors.forename: Myong-Shik
authors.initials: MS
authors.lastname: Cho
authors.forename: Bo-Hye
authors.initials: BH
authors.lastname: Kim
authors.forename: Yun-Mi
authors.initials: YM
authors.lastname: Hwang
authors.forename: Hee-Gweon
authors.initials: HG
authors.lastname: Woo
authors.forename: Do-Heyoung
authors.initials: DH
authors.lastname: Kim
mesh_terms: D000388:Air; D001272:Atmosphere; D002625:Chemistry, Organic / Q000379:methods; D003102:Colloids / Q000737:chemistry; D006860:Hydrogen Bonding; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D036103:Nanotechnology / Q000379:methods*; D009532:Nickel / Q000737:chemistry*; D044367:Phase Transition; D012821:Silanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D003102:Colloids; D012821:Silanes; D012822:Silicon Dioxide; D009532:Nickel