New Trends in Scorpionate Catalysts

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

Deadline for manuscript submissions: closed (15 September 2017) | Viewed by 14524

Special Issue Editor


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Guest Editor
1. ISEL—Instituto Superior de Engenharia de Lisboa, Rua Conselheiro Emídio Navarro 1, 1959-007 Lisboa, Portugal
2. Coordination Chemistry and Catalysis (CCC), CQE—Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Interests: coordination and sustainable chemistry; homogeneous and supported catalysis; nanomaterials and nanocatalysis; electrochemistry
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Special Issue Information

Dear Colleagues,

Scorpionate compounds are undoubtedly among the most important N-donor ligands in coordination chemistry and have been extensively used to synthesize main-group and transition metal complexes where the metal coordination sphere could be carefully tailored by changing the number of pyrazolyl groups at the central atom and the substituents thereon.

The “scorpionate” feature, i.e., the interchange between coordination modes of the scorpionate ligands is believed to be the core of the remarkable structural and chemical versatility found for many metal complexes of this kind. It was also found to be essential for their catalytic applications and, therefore, scorpionate metal compounds have been experience a great deal of increasing interest from specialists in catalysis.

This Special Issue is aimed at covering novel, emerging and promising strategies for the development of improved sustainable catalytic processes by using scorpionate compounds as catalysts.

Authors with expertise in this topic are cordially invited to submit their manuscripts to Catalysts. Significant full papers and review articles are very welcome.

Prof. Luísa Margarida Martins
Guest Editor

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Keywords

  • Homogeneous and supported catalysis
  • Catalysis in non-conventional conditions
  • Catalysis in aqueous media
  • Electro- or Photo-catalysis
  • Bio-inspired catalysis
  • Magnetic/functionalized catalysts
  • Catalytic selective oxidations
  • Polymerization
  • Catalytic C-H activation
  • C-C bond formation

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Published Papers (2 papers)

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Research

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16 pages, 3938 KiB  
Article
Highly Active and Selective Supported Rhenium Catalysts for Aerobic Oxidation of n-Hexane and n-Heptane
by Gopal S. Mishra, Elisabete C. B. A. Alegria, Armando J. L. Pombeiro and Luísa M. D. R. S. Martins
Catalysts 2018, 8(3), 114; https://doi.org/10.3390/catal8030114 - 15 Mar 2018
Cited by 7 | Viewed by 5596
Abstract
A series of derivative C-scorpionate rhenium complexes, i.e., [ReCl2{NNC(O)C6H5}(Hpz)(PPh3)2] (A) (where Hpz is pyrazole), [ReCl2{NNC(O)C6H5}(Hpz)2(PPh3)] (B), [ReClF{NNC(O)C6H [...] Read more.
A series of derivative C-scorpionate rhenium complexes, i.e., [ReCl2{NNC(O)C6H5}(Hpz)(PPh3)2] (A) (where Hpz is pyrazole), [ReCl2{NNC(O)C6H5}(Hpz)2(PPh3)] (B), [ReClF{NNC(O)C6H5}(Hpz)2(PPh3)] (C), and their precursor [ReOCl3(PPh3)2] (D), immobilized on 3-aminopropyl-functionalized silica have been prepared and used for neat O2 oxidation of n-hexane and n-heptane mainly to the corresponding alcohols and, in lower amounts, ketones. The supported catalyst C, with fluoro- and diazenido-ligands, exhibits the highest activity for both alkanes (overall turnover numbers (TONs) up to 3.8 × 103 and 2.5 × 103, for n-hexane and n-heptane, respectively) and can be reused in consecutive catalytic cycles. Improved conversion was observed after addition of hetero-carboxylate co-catalysts. A free-radical-based mechanism is proposed to explain the product formation. Full article
(This article belongs to the Special Issue New Trends in Scorpionate Catalysts)
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Review

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21 pages, 2940 KiB  
Review
C-Homoscorpionate Oxidation Catalysts—Electrochemical and Catalytic Activity
by Luísa M. D. R. S. Martins
Catalysts 2017, 7(1), 12; https://doi.org/10.3390/catal7010012 - 1 Jan 2017
Cited by 33 | Viewed by 7453
Abstract
A survey of the electrochemical properties of homoscorpionate tris(pyrazol-1-yl)methane complexes is presented. The relationship between structural features and catalytic efficiency toward the oxidative functionalization of inexpensive and abundant raw-materials to added-value products is also addressed. Full article
(This article belongs to the Special Issue New Trends in Scorpionate Catalysts)
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