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Catalysts
Special Issues
Metal Complex Catalysis
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Metal Complex Catalysis

A special issue of Catalysts (ISSN 2073-4344).

Deadline for manuscript submissions: closed (31 July 2020) | Viewed by 7272

Special Issue Editors

Prof. Dr. Georgiy B. Shul'pin

E-Mail Website
Guest Editor
Russian Academy of Sciences, Semenov Institute of Chemical Physics, Moscow, Russia
Interests: metal complex catalysis; biomimetic catalysis; photocatalysis; oxidation of hydrocarbons; catalytic activation and functionalization of C–H bonds in hydrocarbons; organometallic chemistry; regioselectivity
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Dmitry A. Loginov

E-Mail Website
Guest Editor
Russian Acad Sci, Nesmeyanov Inst Organoelement Comp, Moscow, Russia
Interests: chemistry and catalytic applications (including C–H activation processes) of transition metal pi-complexes; sandwich compounds; triple-decker complexes; metallacarboranes and transition metal clusters; application of boron compounds for catalyst design in homogeneous catalysis

Special Issue Information

Dear Colleagues,

This Special Issue is devoted to all aspects of metal complex catalysis, including synthesis of catalysts and their application in organic synthesis; efficient and selective functionalization of C–H bonds in saturated and aromatic hydrocarbons, including C–H activation processes under chelation assistance by directing groups; oxidation of hydrocarbons; transformations of smool molecules (CH4, C2H6, N2, H2O, H2O2, CO, CO2, etc.); cycloaddition reactions; regioselective and enantioselective homogeneous catalysis; and metal complex catalyzed polymerization, fine organic synthesis, and hydrogen storage systems. Articles on the study of reaction mechanisms will also be welcome.

It is a pleasure to invite you to submit a manuscript to this Special Issue; regular articles, communications, as well as reviews are all welcome.

Prof. Dr. Georgiy B. Shul'pin
Prof. Dr. Dmitry A. Loginov
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Catalysts is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Homogeneous catalysis
  • Metal complex catalysis
  • Enantioselective catalysis
  • C‒H functionalization
  • C‒H activation
  • Oxidation of hydrocarbons
  • Reaction mechanisms

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Published Papers (2 papers)

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14 pages, 1409 KiB  
Article
An Evolutionary Marker of the Ribokinase Superfamily Is Responsible for Zinc-Mediated Regulation of Human Pyridoxal Kinase
by César A. Ramírez-Sarmiento, Felipe Engelberger and Victoria Guixé
Catalysts 2020, 10(5), 555; https://doi.org/10.3390/catal10050555 - 18 May 2020
Cited by 1 | Viewed by 2643
Abstract
The ribokinase superfamily catalyzes the phosphorylation of a vast diversity of substrates, and its members are characterized by the conservation of a common structural fold along with highly conserved sequence motifs responsible for phosphoryl transfer (GXGD) and stabilization of the metal-nucleotide complex (NXXE). [...] Read more.
The ribokinase superfamily catalyzes the phosphorylation of a vast diversity of substrates, and its members are characterized by the conservation of a common structural fold along with highly conserved sequence motifs responsible for phosphoryl transfer (GXGD) and stabilization of the metal-nucleotide complex (NXXE). Recently, a third motif (HXE) exclusive from ADP-dependent enzymes was identified, with its glutamic acid participating in water-mediated interactions with the metal-nucleotide complex and in stabilization of the ternary complex during catalysis. In this work, we bioinformatically determine that the aspartic acid of another motif (DPV), exclusively found in hydroxyethyl thiazole (THZK), hydroxymethyl pyrimidine (HMPK) and pyridoxal kinases (PLK), is structurally equivalent to the acidic residue in the HXE motif. Moreover, this residue is highly conserved among all ribokinase superfamily members. To determine whether the functional role of the DPV motif is similar to the HXE motif, we employed molecular dynamics simulations using crystal structures of phosphoryl donor substrate-complexed THZK and PLK, showing that its aspartic acid participated in water-mediated or direct interactions with the divalent metal of the metal-nucleotide complex. Lastly, enzyme kinetic assays on human PLK, an enzyme that utilizes zinc, showed that site-directed mutagenesis of the aspartic acid from the DPV motif abolishes the inhibition of this enzyme by increasing free zinc concentrations. Altogether, our results highlight that the DPV and HXE motifs are evolutionary markers of the functional and structural divergence of the ribokinase superfamily and evidence the role of the DPV motif in the interaction with both free and nucleotide-complexed divalent metals in the binding site of these enzymes. Full article
(This article belongs to the Special Issue Metal Complex Catalysis)
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17 pages, 5890 KiB  
Article
Role of the Outer Metal of Double Metal Cyanides on the Catalytic Efficiency in Styrene Oxidation
by Paulina Molina-Maldonado, Rosario Ruíz-Guerrero and Carlos Hernández-Fuentes
Catalysts 2019, 9(11), 905; https://doi.org/10.3390/catal9110905 - 29 Oct 2019
Cited by 5 | Viewed by 3905
Abstract
The catalytic efficiency of double metal cyanide (DMC) has been shown to be very effective in heterogeneous catalysis. The catalytic activity of the outer divalent cations (Mn, Co, Ni, and Cu) of a family of hexacyanocobaltates was examined in the oxidation reaction of [...] Read more.
The catalytic efficiency of double metal cyanide (DMC) has been shown to be very effective in heterogeneous catalysis. The catalytic activity of the outer divalent cations (Mn, Co, Ni, and Cu) of a family of hexacyanocobaltates was examined in the oxidation reaction of styrene, as a model molecule, using tert Butyl Hydroperoxide (TBHP, Luperox®) as an oxidizing agent. The most electronegative outer cations showed the best conversions, with 95% for copper, followed by nickel with 85% conversion of the monomer at atmospheric pressure and temperature of 75 °C. The evidence showed that the catalytic activity and selectivity towards oxidized products are strongly linked to the accurate choice of the outer cation in the DMC together with the oxidizing agent. Full article
(This article belongs to the Special Issue Metal Complex Catalysis)
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