The formation of the spherical self-assembly of gold nanoparticles (AuNPs) of 200 ± 20 nm size at the water–chloroform interface is achieved by employing the cyclotetrasiloxane [RSCH2CH2SiMeO]4 (R = CH2CH2OH) as the stabilizing ligand. The interfacially stabilized AuNPs act as a versatile catalyst for selective hydrolytic oxidation of only one of the Si–H bonds in secondary organosilanes, RR1SiH2 (R
Regioselective Hydrosilylation of Olefins Catalyzed by a Molecular Calcium Hydride Cation
作者:Danny Schuhknecht、Thomas P. Spaniol、Laurent Maron、Jun Okuda
DOI:10.1002/anie.201909585
日期:2020.1.2
Chemo- and regioselectivity are often difficult to control during olefin hydrosilylation catalyzed by d- and f-block metal complexes. The cationichydride of calcium [CaH]+ stabilized by an NNNNmacrocycle was found to catalyze the regioselective hydrosilylation of aliphatic olefins to give anti-Markovnikov products, while aryl-substituted olefins were hydrosilyated with Markovnikov regioselectivity
A catalytic study of water dispersed gold nanoparticles for the hydrolytic oxidation of diorganosilanes – <i>en route</i> formation of a Pickering catalyst and synthesis of tetraorganodisiloxane-1,3-diols
作者:Ravi Shankar、Nidhi Mahavar
DOI:10.1039/d0dt03252b
日期:——
Water-dispersed gold nanoparticles decorated with an amphiphilic cyclotetrasiloxane scaffold hold promise for the catalytic transformation of diorganosilanes to tetraorganodisiloxane-1,3-diols, (RR1SiOH)2O [R = Me or Ph R1 = Ph, cyclo-Hex] via en route formation of a Pickering emulsion. The recognition ability of these compounds toward Cl− ions reveals 2 : 1 receptor-anion complexation.
用两亲性环四硅氧烷支架装饰的水分散金纳米颗粒有望将二有机硅烷催化转化为四有机二硅氧烷-1,3-二醇(RR 1 SiOH)2 O [R = Me或Ph R 1 = Ph,环-Hex]通过在途中形成Pickering乳液。这些化合物朝向Cl组成的识别能力-离子揭示了2:1受体阴离子络合。
Campion, Brian K.; Heyn, Richard H.; Tilley, T. Don, Organometallics, 1992, vol. 11, # 11, p. 3918 - 3920
作者:Campion, Brian K.、Heyn, Richard H.、Tilley, T. Don