Supported organometallic complexes. 5. Polysiloxane-bound ether-phosphines and ruthenium complexes. A characterization by solid-state NMR spectroscopy and catalysis

Grafting of organosilane derived from 3-glycidoxypropyltrimethoxysilane and thiourea onto magnesium phyllosilicate by sol–gel process and investigation of metal adsorption properties

“…Such kind of hybrid materials are synthesized by intercalating various organic species into twodimensional galleries of layered materials such as smectites [8][9][10], and thus immobilizing organic molecules following a sol-gel process [11]. The one-step synthesis of layered inorganic-organic crystalline compounds at room temperature produce an ordered self-assembled structure in which the covalent bond is established between organic and inorganic sides of the formed layer.…”

A Robust, Environmentally Benign Catalyst for Highly Selective Hydroformylation

“…(1)]. [6] The sol ± gel technique is an ideal method to immobilize catalysts because of its diversity [7] and n Si(OR) 4 4n H 2 O 3 n Si(OH) 4 4n ROH 3 polysilicate (1) …”

“…[19] This POP chelate coordination on rhodium, earlier found for 1,5-bis(diphenylphosphanyl)-3oxapentane, [20] is likely an important stabilizing factor for the complex during the sol ± gel process. [6] The catalytic performance of 1 in the hydroformylation of 1-octene was studied in a batch process using 1 g of silica containing 1 Â 10 À5 mol of rhodium. The selectivity of 1 was as high as 93 % towards the linear aldehyde, which is similar to the value for the homogeneous catalyzed reaction ( Table 2, entries 1 and 9).…”

Pentamethylcyclopentadienylrhodium(I) complexes incorporated into porous polysiloxanes prepared by a sol-gel process: catalysts for hydrogenation of crotonic acid in water

“…1,2 The usefulness of this approach to heterogenization of molecularly well-defined transition-metal catalysts was demonstrated in syntheses of polysiloxanebound phosphines, 3,4 ether phosphines [5][6][7][8] and an aminophosphine. 9 Hydrogenation 3,6,8 and N,N-dimethylformamide synthesis 4,10 were carried out under catalysis by these materials, in the latter case with turnover numbers exceeding 100 000. Polysiloxane-bound cyclopentadienylmetal complexes made by the sol-gel method were reported only in one case of a polysiloxane-bound ferrocene, 11 despite the great importance of cyclopentadienyl metal complexes in organometallic chemistry.…”