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Catalysts
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Molybdenum Catalysis
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Molybdenum Catalysis

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Catalytic Materials".

Deadline for manuscript submissions: closed (31 January 2021) | Viewed by 6531

Special Issue Editor

Dr. Carla D. Nunes

E-Mail Website
Guest Editor
Department of Chemistry and Biochemistry, Faculty of Science, UL, Campo Grande, C8, 1749-016 Lisboa, Portugal
Interests: molybdenum; synthesis; characterization; homogeneous and heterogeneous catalysis; catalytic oxidation; green chemistry; mechanism of reactions; environmental catalysis; reactivity studies; structure–activity relations

Special Issue Information

Catalysis is a core concept in chemistry, playing an important role in biological and industrial processes. Novel catalysts and eco-efficient processes are required to develop alternative greener chemical processes. By “greener” I mean more selective and with less by-products. Moreover, using sustainable conditions such as mild temperature and pressure and non-hazardous solvents is also a requisite. Several challenges must be faced during the development of catalysts for those processes. Different types of materials and complexes have experienced a high development in recent years, to this end. Molybdenum-catalyzed systems have received interest from both academic and industrial research laboratories because of the need to obtain important building blocks in organic synthesis and polymer science. The oxidation of alcohols to aldehydes and ketones, the epoxidation of olefins and amines, and reduction or metathesis reactions are important transformations in organic synthesis. Within this field there are several experts that have developed many works dealing with the exploitation of the capabilities of several homo- and heterogeneous molybdenum-based catalytic systems. This Special Issue will aim to gather recent developments in catalysis mediated by molybdenum either in homo- or heterogeneous phase.

Contributions are expected to give insights from novel achievements within this scope.

Dr. Carla D. Nunes
Guest Editor

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 2700 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

  • Molybdenum
  • Homogeneous and heterogeneous catalysis
  • Reactivity studies
  • Green chemistry
  • Mechanism of reactions
  • Structure–activity relations

Published Papers (2 papers)

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Research

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20 pages, 5646 KiB  
Article
Selective and Efficient Olefin Epoxidation by Robust Magnetic Mo Nanocatalysts
by Cristina I. Fernandes, Pedro D. Vaz and Carla D. Nunes
Catalysts 2021, 11(3), 380; https://doi.org/10.3390/catal11030380 - 15 Mar 2021
Cited by 3 | Viewed by 2078
Abstract
Iron oxide magnetic nanoparticles were synthesized with different sizes (11 and 30 nm). Subsequently they were shelled with a silica layer allowing grafting of an organic phosphine ligand that coordinated to the [MoI2(CO)3] organometallic core. The silica layer was [...] Read more.
Iron oxide magnetic nanoparticles were synthesized with different sizes (11 and 30 nm). Subsequently they were shelled with a silica layer allowing grafting of an organic phosphine ligand that coordinated to the [MoI2(CO)3] organometallic core. The silica layer was prepared by the Stöber method using either mechanical (both 11 and 30 nm nanoparticles) or ultrasound (30 nm only) stirring. The latter nanoparticles once coated with silica were obtained with less aggregation, which was beneficial for the final material holding the organometallic moiety. The Mo loadings were found to be 0.20, 0.18, and 0.34 mmolMo·g−1 for MNP30-Si-phos-Mo,MNP11-Si-phos-Mo, and MNP30-Sius-phos-Mo, respectively, with the ligand-to-metal ratio reaching 4.6, 4.8, and 3.2, by the same order, confirming coordination of the Mo moieties to two phos ligands. Structural characterization obtained from powder X-ray diffraction (XRD), scanning electron microscopy (SEM)/ transmission electron microscopy (TEM) analysis, and Fourier-transform infrared (FTIR) spectroscopy data confirmed the successful synthesis of all nanomaterials. Olefin epoxidation of several substrates catalyzed by these organometallic nano-hybrid materials using tert-butyl hydroperoxide (tbhp) as oxidant, achieved very good results. Extensive testing of the catalysts showed that they are highly active, selective, recyclable, and efficient concerning oxidant consumption. Full article
(This article belongs to the Special Issue Molybdenum Catalysis)
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Review

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34 pages, 5935 KiB  
Review
Molybdenum-Containing Metalloenzymes and Synthetic Catalysts for Conversion of Small Molecules
by Donghyeon Kim, Jaeheon Lee and Junhyeok Seo
Catalysts 2021, 11(2), 217; https://doi.org/10.3390/catal11020217 - 06 Feb 2021
Cited by 9 | Viewed by 3891
Abstract
The energy deficiency and environmental problems have motivated researchers to develop energy conversion systems into a sustainable pathway, and the development of catalysts holds the center of the research endeavors. Natural catalysts such as metalloenzymes have maintained energy cycles on Earth, thus proving [...] Read more.
The energy deficiency and environmental problems have motivated researchers to develop energy conversion systems into a sustainable pathway, and the development of catalysts holds the center of the research endeavors. Natural catalysts such as metalloenzymes have maintained energy cycles on Earth, thus proving themselves the optimal catalysts. In the previous research results, the structural and functional analogs of enzymes and nano-sized electrocatalysts have shown promising activities in energy conversion reactions. Mo ion plays essential roles in natural and artificial catalysts, and the unique electrochemical properties render its versatile utilization as an electrocatalyst. In this review paper, we show the current understandings of the Mo-enzyme active sites and the recent advances in the synthesis of Mo-catalysts aiming for high-performing catalysts. Full article
(This article belongs to the Special Issue Molybdenum Catalysis)
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