Modified silica particles are provided. Aspects of the particles include an outer layer that is composed of organically-modified silica comprising a siloxane-linked hydrophilic group, such as a charged functional group or a polar neutral functional group. The modified silica particles can form the basis of a variety of chromatography support materials. Also provided are methods of preparing the subject particles. Aspects of the methods include contacting silica particles with water, an ionic fluoride and an organosilane reagent comprising a hydrophilic moiety to produce modified silica particles wherein the hydrophilic moiety of the organosilane reagent is incorporated into an outer layer of the silica particles. Chromatography supports and kits including the subject particles and methods of using the same are also provided.

A method of preparing an organosilanol compound is disclosed. The method comprises reacting (A) an initial organosilicon compound and (B) water in the presence of (C) a catalyst. The catalyst (C) is selected from: (C1) [(C.sub.8H.sub.12irCl].sub.2[(p-cymene)RuCl.sub.2].sub.2; and (C3) Pd/C. The initial organosilicon compound (A) has the general formula HO—Si(R).sub.2—[Si(R).sub.2O].sub.a—OSi(R).sub.2—Y and the organosilanol compound has the general formula HO—Si(R)2-[Si(R).sub.2O].sub.a—OSi(R).sub.2—Y, where each R is an independently selected hydrocarbyl group; Y comprises a functional moiety selected from alkoxysilyl moieties, epoxide moieties, and acryloxy moieties, with the proviso that Y is other than the acryloxy moieties when the catalyst (C) is (C3) Pd/C; and subscript a is 0 or 1. The organosilanol compound prepared by the method is also provided.

Modified silica particles are provided. Aspects of the particles include an outer layer that is composed of organically-modified silica comprising a siloxane-linked hydrophilic group, such as a charged functional group or a polar neutral functional group. The modified silica particles can form the basis of a variety of chromatography support materials. Also provided are methods of preparing the subject particles. Aspects of the methods include contacting silica particles with water, an ionic fluoride and an organosilane reagent comprising a hydrophilic moiety to produce modified silica particles wherein the hydrophilic moiety of the organosilane reagent is incorporated into an outer layer of the silica particles. Chromatography supports and kits including the subject particles and methods of using the same are also provided.

A method of conferring modified properties, e.g. modified physical and/or biochemical properties, to a metallic substrate surface, including at least two steps being (i) a first step including at least exposing the substrate surface to a hetero-bifunctional anchoring molecule carrying at least a silane group and at least a A.sub.1 group, the A.sub.1 group being optionally introduced within the anchoring molecule via a preliminary functionalizing step, and (ii) a second step of exposing the substrate surface to a polymer carrying at least three groups A.sub.2 capable of reacting with A.sub.1 in a thiol-ene reaction, the number average molecular weight of the polymer being greater than 1 000 g/mol.

There is provided an iron-based complex of formula (IA) or (IB) or a solvate thereof (IA) (IB). The iron-based complex can be used for catalyzing a hydrosillation reaction, such as the hydrosilylation of a ketone or an aldehyde. Also provided is a method for preparing a silyl ether from a ketone or an aldehyde comprising the hydrosilylation of the ketone or aldehyde in the presence of the iron-based complex. Another method is provided for the synthesis of an alcohol from a ketone or an aldehyde comprising the hydrosilylation of the ketone or aldehyde in the presence of the iron-based complex to form a silyl ether, and then hydrolyzing the silyl ether to obtain the alcohol. A process for preparing the iron-based complex is further disclosed.

This disclosure relates to a silica support for a metallocene catalyst used for olefin polymerization, a preparation method thereof, a metallocene catalyst using the same, and olefin polymer. Specifically, according to the present invention, a silica support used for preparing a metallocene supported catalyst is treated with a specific halogenized metal compound, thereby diversifying reaction sites to a cocatalyst when preparing a metallocene catalyst, and thus, the molecular weight distribution of produced olefin polymer may be much broadened and polymer having high molecular weight may be obtained compared to the existing support, even if the same metallocene catalyst is supported.

A method of preparing an organosilanol compound is disclosed. The method comprises reacting (A) an initial organosilicon compound and (B) water in the presence of (C) a catalyst. The catalyst (C) is selected from: (C1) [(C.sub.8H.sub.12irCl].sub.2[(p-cymene)RuCl.sub.2].sub.2; and (C3) Pd/C. The initial organosilicon compound (A) has the general formula HOSi(R).sub.2[Si(R).sub.2O].sub.aOSi(R).sub.2Y and the organosilanol compound has the general formula HOSi(R)2-[Si(R).sub.2O].sub.aOSi(R).sub.2Y, where each R is an independently selected hydrocarbyl group; Y comprises a functional moiety selected from alkoxysilyl moieties, epoxide moieties, and acryloxy moieties, with the proviso that Y is other than the acryloxy moieties when the catalyst (C) is (C3) Pd/C; and subscript a is 0 or 1. The organosilanol compound prepared by the method is also provided.

The present disclosure relates to compositions of matter comprising synthetic blends of at least two feedstocks that produce a distribution of fluorinated polyhedral oligomeric silsesquioxane compounds. The present disclosure also relates to methods of making such fluorinated polyhedral oligomeric silsesquioxane compounds from such synthetic blends. The present disclosure also relates to uses of such fluorinated polyhedral oligomeric silsesquioxane compounds.