Transition metal catalysts for the hydrogenation of carbon dioxide to value added materials DOI Open Access

Clayton Hert

Published: Aug. 1, 2023

Over the last several years field of CO2 hydrogenation has become robust and is still growing. There great deal interest into sector as new ligands, catalysts, systems are published regularly which help us further understand intricacies reaction how we might improve it for future use. This work first analyzes current catalysts employable carbon dioxide to formates, formamides, methanol. We produced a iPrPNPhP ligand derived from commonly used ligands iPrPNMeP iPrPNHP. these isolate characterize series ruthenium hydride complexes demonstrated their very different catalytic ability formic acid dehydrogenation formate. furthered our labs previous on increased reactivity non metal cooperative mechanism Lewis assisted formate with manganese pincer complexes. The matched those previously seen iron, mechanistic studies were performed elucidate effect non-metal mechanisms have catalyst activity. Lastly report synthetic progress towards phospholane bear ligand. Success was had in isolating system though underway its catalysis.

Language: Английский

Homo- to Co-Polyester Conversion in the Absence of Reagents Fa-cilitated by a Dual Catalytic Process Involving Hydrogen Borrowing DOI Creative Commons
Frederik Rummel, Afiq Anuar, Qiang Yu

et al.

Published: Dec. 22, 2023

A ruthenium-catalyzed hydrogen transfer ester metathesis (HTEM) is reported that allows for the isomerization of a linear polyester such as polycaprolactone (PCL) without need any stoichiometric reagent, forming novel type co-polyester containing additional hexylene adipate (HA) repeating units. Mechanistic investigations show formation chemically modified relies on two-fold catalytic reaction; HTEM via borrowing process and concomitant transesterification catalyzed by base co-catalyst. Evidence provided me-tathesis proceeds reversible aldehyde formation. The described represents an unprecedented within polymers – bears significant importance regarding dynamic post-synthetic modification polyesters.

Language: Английский

Citations

1
Homo- to Co-Polyester Conversion in the Absence of Reagents Fa-cilitated by a Dual Catalytic Process Involving Hydrogen Borrowing DOI Creative Commons
Frederik Rummel, Afiq Anuar, Qiang Yu

et al.

Published: Dec. 22, 2023

A ruthenium-catalyzed hydrogen transfer ester metathesis (HTEM) is reported that allows for the isomerization of a linear polyester such as polycaprolactone (PCL) without need any stoichiometric reagent, forming novel type co-polyester containing additional hexylene adipate (HA) repeating units. Mechanistic investigations show formation chemically modified relies on two-fold catalytic reaction; HTEM via borrowing process and concomitant transesterification catalyzed by base co-catalyst. Evidence provided me-tathesis proceeds reversible aldehyde formation. The described represents an unprecedented within polymers – bears significant importance regarding dynamic post-synthetic modification polyesters.

Language: Английский

Citations

1
Manganese-catalyzed nucleophilic addition of aldehydes to carbonyl compounds via hydrazone umpolung on water DOI
Jan Michael Salgado, Durbis J. Castillo‐Pazos, Juan D. Lasso

et al.

Green Chemistry, Journal Year: 2024, Volume and Issue: 26(12), P. 7357 - 7362

Published: Jan. 1, 2024

Herein, we report an operationally simple addition of hydrazones to carbonyl compounds using earth-abundant metal, under aqueous and aerobic conditions.

Language: Английский

Citations

0
Development of Mn(i)-based catalysts for CO2 hydrogenation/dehydrogenation in the context of hydrogen storage/release systems DOI
Mohammed Cassiem Joseph, Andrew J. Swarts

Royal Society of Chemistry eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 117 - 149

Published: Dec. 6, 2024

This chapter provides a comprehensive overview of recent advancements in Mn(i)-catalysed hydrogenation and dehydrogenation reactions, with focus on their application hydrogen storage systems. It explores the reactivity Mn(i) complexes formate analogues, as well catalytic mechanisms, highlighting potential these catalysts to contribute circular carbon economy. The investigates use carbonate hydroxide salts amines environmentally friendly materials for storage, demonstrating substantial efficiency high evolution yield excellent reloading purity. systems’ operation below 100 °C suggests possibility waste heat management integration into process. also discusses challenges limitations encountered, such decreased subsequent cycles solubility issues certain CO2 absorbents. Overall, presents promising candidates renewable energy applications, offering insights current future perspectives development efficient, affordable, sustainable technologies.

Language: Английский

Citations

0
Catalytic Synthesis of Formates from Co2 Hydrogenation Using Homogeneous Pd (Ii) and Pt (Ii) Tridentate Catalysts DOI
Asanda C. Matsheku, Munaka Christopher Maumela,

Banothile C. E. Makhubela

et al.

Published: Jan. 1, 2023

The production of fossil fuels negatively impacts the ecosystem and causes global warming due to greenhouse gas emissions, mainly CO2. With aim reducing vast amounts CO2 in our atmosphere, Pd iminophosphorane pincer complexes were used for hydrogenation Moreover, NNP PNP tridentate Schiff-base ligands also prepared their corresponding Pd(II) Pt(II) isolated application as pre-catalysts hydrogenation. This was achieved presence molecular hydrogen (H2 gas) KOH towards potassium formate, which has applications energy carrier fuel cells. It been hypothesized that formate proceeded by initially forming bicarbobate these systems. TON’s up 562 obtained. Black particles observed after analysed found be nanoparticles (NPs). NPs active with reduced activity.

Language: Английский

Citations

0
Machine Learning-Enabled Predictions of Condensed Fukui Functions and Designing of Metal Pincer Complexes for Catalytic Hydrogenation of CO2 DOI
Saurabh Vinod Parmar,

P. S. DESHMUKH,

Rutuja Sankpal

et al.

The Journal of Physical Chemistry A, Journal Year: 2023, Volume and Issue: 127(40), P. 8338 - 8346

Published: Sept. 27, 2023

This research showcases the machine learning (ML)-enabled homogeneous catalyst discovery to be employed in carbon dioxide hydrogenation. To achieve desired turnover frequency (TOF), electrophilicity of central metal atom is a crucial factor transition pincer complexes. The condensed Fukui function direct measure catalytic performance these Herein, we demonstrate that convenient and effiecient method calculate functions atom. values 202 complexes were calculated by using density functional theory (DFT) train ML model. test data experimentally established show linkage between experimental TOF. Further, this was used develop an protocol screen 2,84,062 get Mn, Fe, Co, Ni metals encompassing various permutation combinations PNP, PNN, NNN, PCP ligands. These findings validate efficacy rapid screening catalysts based on functions.

Language: Английский

Citations

0
Transition metal catalysts for the hydrogenation of carbon dioxide to value added materials DOI Open Access

Clayton Hert

Published: Aug. 1, 2023

Over the last several years field of CO2 hydrogenation has become robust and is still growing. There great deal interest into sector as new ligands, catalysts, systems are published regularly which help us further understand intricacies reaction how we might improve it for future use. This work first analyzes current catalysts employable carbon dioxide to formates, formamides, methanol. We produced a iPrPNPhP ligand derived from commonly used ligands iPrPNMeP iPrPNHP. these isolate characterize series ruthenium hydride complexes demonstrated their very different catalytic ability formic acid dehydrogenation formate. furthered our labs previous on increased reactivity non metal cooperative mechanism Lewis assisted formate with manganese pincer complexes. The matched those previously seen iron, mechanistic studies were performed elucidate effect non-metal mechanisms have catalyst activity. Lastly report synthetic progress towards phospholane bear ligand. Success was had in isolating system though underway its catalysis.

Language: Английский

Citations

0