نتایج جستجو برای: hybrid catalysts

تعداد نتایج: 223194  

Journal: :polyolefins journal 2015
helmut g. alt

eethylene polymerization catalysts became available in an enormous variety. the challenge in this research is to find catalysts that are able to connect ethylene molecules in such a way that not only linear chains are produced but variations like branched materials that possess very interesting mechanical properties like linear low density polyethylene (lldpe). in this contribution, three diffe...

2011
Chi-Hsien Kuo Christof M. Niemeyer Ljiljana Fruk

A bimetallic heme-DNA cofactor, containing an iron and a copper center, was synthesized for the design of novel hybrid catalysts for stereoselective synthesis. The cofactor was used for the reconstitution of apo-myoglobin. Both the cofactor alone and its myoglobin adduct were used to catalyze a model Diels Alder reaction. Stereoselectivity of this conversion was analyzed by chiral HPLC. Reactio...

Journal: :Physical chemistry chemical physics : PCCP 2017
Y Zhou S Yang J Huang

In this work, we report a new photocatalytic system that links multifunctional semiconductor nanocrystals with emerging water-soluble molecular catalysts made of earth-abundant elements for H2 generation [Ni(P2RN2R')2(BF4)2]4-, R = Ph, R' = [PhSO3]- (NiS). This noble metal free hybrid exhibits remarkable catalytic activity with a turnover number of 511 for H2 production and a photon-to-H2 conve...

2002
Bao-Hang Han Sebastian Polarz Markus Antonietti

Inclusion complexes of cyclodextrins with organometallic coordination compounds of Pd, Pt, Rh, Fe, Ni, and Ru have been used to produce porous metal-silica hybrid materials. The cyclodextrins are templates for the structure of the silica and lead to a uniform “wormtype” pore system. After the templating step the organometallic compounds can be employed as in situ precursors for the preparation ...

Journal: :Dalton transactions 2016
Wei Jie Teo Zhe Wang Fei Xue T S Andy Hor Jin Zhao

Cyclopentadienyl (Cp) Ni(ii) complexes [CpNiL][PF6] containing hybrid N,C chelating benzothiazolyl NHC ligands (L1 = 1-(2-benzothiazolyl)-3-methylimidazol-2-ylidene, ; L2 = 1-(2-benzothiazolyl)-3-allylimidazol-2-ylidene, ; L3 = 1-(2-benzothiazolyl)-3-benzylimidazol-2-ylidene, ) have been synthesized and fully characterized. The catalytic activity of in some C-C bond formation reactions has been...

Journal: :RSC advances 2015
Maximilian Tiffner Johanna Novacek Alfonso Busillo Katharina Gratzer Antonio Massa Mario Waser

Bifunctional chiral urea-containing quaternary ammonium salts can be straightforwardly synthesised in good yield and with high structural diversity via a scalable and operationally simple highly telescoped sequence starting from trans-1,2-cyclohexanediamine. These novel hybrid catalysts were systematically investigated for their potential to control glycine Schiff bases in asymmetric addition r...

Journal: :Chinese Journal of Catalysis 2023

Combining enzymatic and single-metal-atom catalysis is a promising approach for green chemical synthesis. We herein report one-pot chemoenzymatic cascade reaction to asymmetric synthesize (R)-1-(4-biphenyl) ethanol by using the highly active selective enzyme-metal-single-atom hybrid as catalyst. demonstrate that Pd single atoms anchored lipase (Pd1/CALB-P) can efficiently drive reactions in aqu...

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