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Jordan De Jesus SilvaETH Zurich | ETH Zürich · Department of Chemistry and Applied Biosciences
Jordan De Jesus Silva
Master of Science
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12
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Publications
Publications (12)
Cationic d0 group 6 olefin metathesis catalysts have been recently shown to display in most instances superior activity in comparison to their neutral congeners. Furthermore, their catalytic performance is greatly improved upon immobilization on silica. In this context, we have developed the new family of molecular cationic molybdenum oxo alkyliden...
The development of an efficient heterogeneous catalyst for storing H2 into CO2 and releasing it from the produced formic acid, when needed, is a crucial target for overcoming some intrinsic criticalities of green hydrogen exploitation, such as high flammability, low density, and handling. Herein, we report an efficient heterogeneous catalyst for bo...
The combination of high-throughput experimentation (HTE) and data analysis is a valuable methodology for mechanistic interrogation and rational development of catalysts. In this article, we point out the general structure of HTE-data analysis workflow and illustrate how it can be applied with examples of olefin metathesis and cyanation reactions.
A synthetic method for the palladium-catalyzed cyanation of aryl boronic acids using bench stable and non-toxic N-cyanosuccinimide has been developed. High-throughput experimentation facilitated the screen of 90 different ligands and the resultant statistical data analysis identified that ligand σ–donation, π–acidity and sterics are key drivers tha...
A synthetic method for the palladium-catalyzed cyanation of aryl boronic acids using bench stable and non-toxic N-cyanosuccinimide has been developed. High-throughput experimentation facilitated the screen of 90 different ligands and the resultant statistical data analysis identified that ligand σ–donation, π–acidity and sterics are key drivers tha...
Since its early days, olefin metathesis has been in the focus of scientific discussions and technology development. While heterogeneous olefin metathesis catalysts based on supported group 6 metal oxides have been used for decades in the petrochemical industry, detailed mechanistic studies and the development of molecular organometallic chemistry h...
The catalytic performances of molecular and silica-supported molybdenum oxo alkylidene species bearing anionic O ligands [ORF9, OTPP, OHMT - where ORF9 = OC(CF3)3, OTPP = 2,3,5,6-tetraphenylphenoxy, OHMT = hexamethylterphenoxy] with different σ-donation abilities and sizes are evaluated in the metathesis of both internal and terminal olefins. Here,...
A well‐defined silica‐supported cationic W imido alkylidene was prepared through surface organometallic chemistry. This catalyst shows preferential activity towards α‐ over internal olefins, which is atypical for W‐based catalysts, but consistent with the strong σ‐donating ability of the NHC ancillary ligand. Complementing the studies on tungsten‐b...
A combination of high-throughput experimentation (HTE), surface organometallic chemistry (SOMC) and statistical data analysis provided the platform to analyze in situ silica-grafted Mo imido alkylidene catalysts based on a library of 35 phenols. Overall, these tools allowed for the identification of σ-donor electronic effects and dispersive interac...
A high throughput experimentation (HTE) study identified active Ru metathesis catalysts and reaction conditions for the ethenolysis of maleate esters to the respective acrylate esters. Catalysts were tested at various loadings (75–10’000 ppm) and temperatures (30–60 o C) with maleate esters dissolved in toluene (up to ca. 44 wt%) or neat and at var...
High-throughput experimentation and multivariate modelling allow identification of non-covalent interactions (NCIs) in monoaryloxy-pyrrolide Mo imido alkylidene metathesis catalysts prepared in situ as a key driver for high activity in a representative crossmetathesis reaction (homodimerization of 1-nonene). Statistical univariate and multivariate...
Combining Surface Organometallic Chemistry with rigorous olefin purification protocol allows evaluating and comparing the intrinsic activities of Mo and W olefin metathesis catalysts towards different types of olefin substrates. While well-defined silica-supported Mo and W imido-alkylidenes show very similar activities in metathesis of internal ole...