20 Articles found
SusChem Articles
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Integrating Reverse-Electrodialysis Stacks with flow batteries for improved energy recovery from salinity gradients and energy storage
Abstract Salinity gradient energy can be directly converted into electrical power by using reverse electrodialysis (RED) and other technologies, but reported power densities have been too low for practical applications. Herein, the RED stack ...
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Novel mixed-mode stationary phases for chromatographic separation of complex mixtures of decomposed lignin
Abstract Electrochemical degradation of lignin results in a large number of unknown products, formed by both oxidative and reductive decomposition pathways, which have previously been studied by direct mass spectrometry experiments without prior ...
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CO2 Capture from Ambient Air by Crystallization with a Guanidine Sorbent
Carbon capture and storage is an important strategy for stabilizing the increasing concentration of atmospheric CO2 and the global temperature. A possible approach toward reversing this trend and decreasing the atmospheric CO2 concentration is to ...
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Production of p-Methylstyrene and p-Divinylbenzene from Furanic Compounds
A four-step catalytic process was developed to produce p-methylstyrene from methylfuran, a biomass-derived species. First, methylfuran was acylated over zeolite H-Beta with acetic anhydride. Second, the acetyl group was reduced to an ethyl group ...
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Effect of low cadmium concentration on the removal efficiency and mechanisms in microbial electrolysis cells
Abstract Microbial electrolysis cells (MECs) can be used to remove cadmium (Cd2+) via three removal mechanisms: electrodeposition; chemical precipitation; and biosorption. Here, we investigated how cadmium concentration affects its removal ...
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Greener, Recyclable, and Reusable Ruthenium(III) Chloride/Polyethylene Glycol/Water System for the Selective Hydrogenation of Biomass-Derived Levulinic Acid to γ-Valerolactone
A versatile and efficient catalyst for the hydrogenation of biomass-derived levulinic acid to γ-valerolactone (GVL) by using a RuCl3/polyethylene glycol (PEG-400) /H2O catalyst system was developed. The catalysis system was also found to be ...
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Heterogeneous Palladium-Catalyzed Hydrogen-Transfer Cyclization of Nitroacetophenones with Benzylamines: Access to C−N Bonds
The first Pd/C-catalyzed oxidative C(sp3)−H bond amination of o-nitroacetophenones with benzylamines or amino acids proceeding through C−N bond cleavage followed by C−N bond formation by a hydrogen-transfer strategy was ...
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Using Anilines as Masked Cross-Coupling Partners: Design of a Telescoped Three-Step Flow Diazotization, Iododediazotization, Cross-Coupling Process
The conversion of commercially available anilines into biaryl and biarylacetylene products was realized by using a telescoped, three-reactor flow diazotization/iododediazotization/cross-coupling process. The segmented flow stream created by ...
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Oxime Palladacycle Catalyzed Carbonylative Sonogashira Cross-Coupling with High Turnovers in PEG as a Benign and Recyclable Solvent System
Oxime palladacycles- di-μ-chlorobis [5-chloro-2-[(4- chlorophenyl)(hydroxyimino-κN) methyl] phenyl-κC] palladium (II) dimer (1) and di-μ-chlorobis [5-hydroxy-2-[1-(hydroxyimino-κN) ethyl] phenyl-κC] palladium (II) dimer ...
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Manganese-Promoted Oxidative Cyclization of Unsaturated Oximes Using Molecular Oxygen in Air under Ambient Conditions
A highly efficient manganese-promoted oxidative cyclization of unsaturated oximes to afford the corresponding 4,5-dihydroisoxazoline alcohols was developed. A very low loading (generally 0.1–0.2 mol-%) of Mn(acac)3 (acac = acetylacetonate) ...
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A Frustrated and Confused Lewis Pair
We report a new class of frustrated Lewis pairs (FLPs) by the hydroboration of bulky isocyanates iPr2ArNCO (iPr2Ar=2,6-iPr2C6H3) and Ph2tBuArNCO (Ph2tBuAr=2,6-Ph2-4-tBuC6H2) with Piers’ borane (HB(C6F5)2). While hydroboration of smaller ...
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Solvent-Free Synthesis of c-Axis Oriented ZSM-5 Crystals with Enhanced Methanol to Gasoline Catalytic Activity
ZSM-5 crystals with controllable c-axis length were successfully synthesized through a one-pot solvent-free route, with urea as an additive. X-ray diffraction patterns (XRD) show that the prepared samples exhibit high crystallinity. N2 ...
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Expeditious Assembly of Fluorenones through Domino Reactions of Benzoyl Chlorides with Arylboronic Acids Catalyzed by ONO Pincer-like Palladium(II) Complexes
A new set of palladium(II) complexes featuring ONO pincer-type ligands were synthesized and utilized as efficient homogeneous catalysts for the domino reactions of benzoyl chlorides with arylboronic acids to yield a library of fluorenones. The ...
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Oxocarbon Salts for Fast Rechargeable Batteries
Oxocarbon salts (M2(CO)n) prepared through one-pot proton exchange reactions with different metal ions (M=Li, Na, K) and frameworks (n=4, 5, 6) have been rationally designed and used as electrodes in rechargeable Li, Na, and K-ion batteries. The ...
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Polysilylether: A Degradable Polymer from Biorenewable Feedstocks
The synthesis of polysilylethers (PSEs) using a monomer derived from a biorenewable feedstock is reported. The AB-type monomer was synthesized from undecenoic acid through hydrosilylation and reduction, and the polymerization was catalyzed by ...
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A High-Performance Base-Metal Approach for the Oxidative Esterification of 5-Hydroxymethylfurfural
Exploring high-performance base-metal approaches for the sustainable production of chemicals from biomass is presently attracting immense interest and is truly important to promote their industrialized application. Herein, CoOx-N/C and ...
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Which Metals are Green for Catalysis? Comparison of the Toxicities of Ni, Cu, Fe, Pd, Pt, Rh, and Au Salts
Environmental profiles for the selected metals were compiled on the basis of available data on their biological activities. Analysis of the profiles suggests that the concept of toxic heavy metals and safe nontoxic alternatives based on lighter ...
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Electrochemical Allylic Oxidation of Olefins: Sustainable and Safe
The power you`re supplying: With the application of an optimized electrochemical approach, the allylic oxidation of olefins, which is an important C−H activation process that provides access to enones, becomes a sustainable, versatile, and ...
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From Oleo Chemicals to Polymer: Bis-hydroaminomethylation as a Tool for the Preparation of a Synthetic Polymer from Renewables
Resource-efficient bis-hydroaminomethylation of the castor oil derived renewables methyl 10-undecenoate and 10-undecene-1-ol with piperazine furnished linear, bifunctional molecules. A structured and sustainable path towards a novel polyester from ...
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Synthesis of β-Cyano ketones promoted by a Heterogeneous Fluoride catalyst
Keywords: β-cyano ketones;heterogeneous catalysis;solvent-free conditions;sustainable chemistry;A simple protocol for the conjugate addition of cyanide group to α,β-unsaturated ketones has been developed. By exploiting solvent-free ...