Modified Raney Nickel (MRNi) Catalyst: Heterogeneous Enantio-Differentiating (Asymmetric) Catalyst

Izumi, Yoshiharu

doi:10.1016/s0360-0564(08)60441-1

Cited by 285 publications

(104 citation statements)

References 70 publications

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“…However, few -if any -industrial enantioselective processes are heterogeneously catalysed at present. Academic research focussed so far on few classes of enantioselective heterogeneous catalytic processes: the enantioselective hydrogenation of -keto esters over Pt based systems and the asymmetric hydrogenation of -keto esters over Ni based catalysts [263][264][265], while Pd is used as base material for the hydrogenation of ketones [266][267][268][269][270]. In all cases enantioselectivity is conferred to the metal nanoparticles by the adsorption of chiral molecules (modifiers).…”

Section: Amino Acids Adsorption At Transition Metalsmentioning

confidence: 99%

“…R,R-tartaric acid) or -amino acids (e.g. Salanine) [263][264][265]. Pd is successfully modified by proline adsorption [268][269][270].…”

Section: Amino Acids Adsorption At Transition Metalsmentioning

confidence: 99%

“…In the present review, we will focus our attention on the latter species, which shows a peculiar behaviour as a modifier since the dominant enantiomer produced in the catalytic reaction depends on T ev . Glu adsorption below 350 K results in a preference for the R enantiomeric product in the hydrogenation of -keto-esters, while adsorption above 350 K favours the S product ( Figure 67) [263]. The (S)-Glu/Ni(111) system was thoroughly studied by the group of Baddeley, who started from the characterisation of the Glu layer [170] and moved than to the investigation of the chemical activity of the chirally-modified (S)-Glu/Ni catalyst with respect to the simplest -keto ester, i.e.…”

Section: Adsorption At Pt(111) and Pd(111)mentioning

confidence: 99%

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Adsorption and self-assembly of bio-organic molecules at model surfaces: A route towards increased complexity

Costa

Pradier

Tielens

et al. 2015

Surface Science Reports

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Understanding the bio-physical-chemical interactions at nanostructured biointerfaces and the assembling mechanisms of so-called hybrid nano-composites is nowadays a keyissue for nanoscience in view of the many possible applications foreseen. The contribution of surface science in this field is noteworthy since, using a bottom-up approach, it allows the investigation of the fundamental processes at the basis of complex interfacial phenomena and thus it helps to unravelthe elementary mechanisms governing them. Nowadays it is well demonstrated that a wide variety of different molecular assemblies can form upon adsorption of small biomolecules at surfaces. The geometry of such self-organized structures can often be tuned by a careful control of the experimental conditions during the deposition process. Indeed an impressive number of studies exist (both experimental and -to a lesser extendtheoretical), which demonstrate the ability of molecular self-assembly to create different structural motifs in a more or less predictable manner, by tuning the molecular building blocks as well as the metallic substrate. In this frame, amino acidsand small peptides at surfaces are key, basic, systems to be studied. The amino acidsstructure is simple enough to serve as a model for the chemisorption of biofunctional molecules, but their adsorption at surfaces has applications in surface functionalization, in enantiospecific catalysis, biosensing, nanoparticles shape control or in emerging fields such as "green" corrosion inhibition. In this paper we review the most recent advancements in this field. We will start from amino acids adsorption at metal surfaces and we will evolve then in the direction of more complex systems, in thelight of the latest improvements of surface science techniques and of computational methods. On one side, we will focus on amino acids adsorption at oxide surfaces, on the other on peptide adsorption both at metal and oxide substrates. Particular attention will be drawn to the added value provided by the combination of several experimental surface science techniques and to the precious contribution of advanced complementary computational methods to resolve the details of systems of increased complexity. Finally, some hints into experiments performed in the presence of water and then characterized in UHV and in the related theoretical work will be presented. This is a further step towards abetter approximation of real biological systems. However, since the methods employed are often not typical of surface science, this topic is not developed in details.2

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Section: Amino Acids Adsorption At Transition Metalsmentioning

confidence: 99%

“…R,R-tartaric acid) or -amino acids (e.g. Salanine) [263][264][265]. Pd is successfully modified by proline adsorption [268][269][270].…”

Section: Amino Acids Adsorption At Transition Metalsmentioning

confidence: 99%

Section: Adsorption At Pt(111) and Pd(111)mentioning

confidence: 99%

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Adsorption and self-assembly of bio-organic molecules at model surfaces: A route towards increased complexity

Costa

Pradier

Tielens

et al. 2015

Surface Science Reports

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show abstract

“…They have been produced by decorating the surfaces of achiral substrates by chiral molecules, or by introducing defects in the single crystals which exposes chiral kink sites. [6][7][8][9][10][11][12][13][14][15][16][17] It was shown that chiral surfaces can also be produced by electrodeposition technique. [18,19] Unlike other vacuum techniques, electrodeposition is cheaper and can be carried out at ambient conditions.…”

Section: Introductionmentioning

confidence: 99%

Epitaxial Electrodeposition of Chiral Films Using Chiral Precursors

Gudavarthy¹,

Kulp²

2012

Recent Advances in Crystallography

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“…1979-ben e kutatások vezettek az egyik leghatékonyabbnak számító katalizátorrendszer (Raney-Ni/borkısav/NaBr) kidolgozásához, melyet β-ketoészterek, β-diketonok és metil-ketonok enantioszelektív hidrogénezéseinél alkalmaztak. Ezek voltak az elsı olyan sikeres kísérletek, melyek során nagy, reprodukálható enantioszelektivitást és állandó katalizátor aktivitást lehetett elérni [13]. Még ugyanabban az évben Orito és munkatársai írtak le másik, a módosított Raney-Ni katalizátorhoz hasonlóan, nagy hatékonysággal mőködı cinkona alkaloidokkal módosított platina katalizátort [14].…”

Section: Történeti áTtekintésunclassified

Aktivált ketonok cinkona alkaloidokkal módosított heterogén katalitikus enantioszelektív hidrogénezése, folyamatos áramú rendszerben

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Modified Raney Nickel (MRNi) Catalyst: Heterogeneous Enantio-Differentiating (Asymmetric) Catalyst

Cited by 285 publications

References 70 publications

Adsorption and self-assembly of bio-organic molecules at model surfaces: A route towards increased complexity

Adsorption and self-assembly of bio-organic molecules at model surfaces: A route towards increased complexity

Epitaxial Electrodeposition of Chiral Films Using Chiral Precursors

Aktivált ketonok cinkona alkaloidokkal módosított heterogén katalitikus enantioszelektív hidrogénezése, folyamatos áramú rendszerben

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