The first stable copper borohydride complex [(CAAC)CuBH4] [CAAC = cyclic(alkyl)(amino)carbene] bearing a single monodentate ligand was prepared by addition of NaBH4 or BH3NH3 to the corresponding [(CAAC)CuCl] complex. Both complexes are air-stable and promote the catalytic hydrolytic dehydrogenation of ammonia borane. The amount of hydrogen released reaches 2.8 H2/BH3 NH3 with a turnover frequency of 8400 mol H2 molcat(-1) h(-1) at 25 °C. In a fifteen-cycle experiment, the catalyst was reused without any loss of efficiency.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1002/anie.201500224 | DOI Listing |
Arch Toxicol
September 2024
West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, China.
5F-EDMB-PICA is a newly emerged synthetic cannabinoid which has been characterized in relevant literature in recent years. Although phase-I metabolites of 5F-EDMB-PICA have been partly reported, the phase-II metabolism of this synthetic cannabinoid has not been studied yet. In this study, we established a phase-I and phase-II metabolism model in vitro by using pooled human liver microsomes, NADPH regeneration system, and UGT incubation system, with 1 mg/ml 5F-EDMB-PICA added and incubated at 37 °C for 60 min.
View Article and Find Full Text PDFJ Colloid Interface Sci
September 2024
College of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China. Electronic address:
The coordination between carrier and active metal is critical to the catalytic efficiency of ammonia borane (AB) hydrolysis reaction. In the present study, we report a new type of catalytic support based on molybdenum boride (MBene) MoAlB and demonstrate that the effective combination of MoAlB with Ru nanoparticles can realize the significantly enhanced performance for hydrogen generation. Owing to the efficient activation and dissociation of reactants, the optimal Ru/MoAlB catalyst achieves the large turnover frequency of 494 mol mol min, high hydrogen generation rate of 119817 mL min g and favorable apparent activation energy of 39.
View Article and Find Full Text PDFMolecules
April 2024
The State Key Laboratory of Refractories and Metallurgy, Faculty of Materials, Wuhan University of Science and Technology, Wuhan 430081, China.
Graphene is a good support for immobilizing catalysts, due to its large theoretical specific surface area and high electric conductivity. Solid chemical converted graphene, in a form with multiple layers, decreases the practical specific surface area. Building pores in graphene can increase specific surface area and provide anchor sites for catalysts.
View Article and Find Full Text PDFMolecules
March 2024
Department of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, ND 58202, USA.
Polymer research is currently focused on sustainable and degradable polymers which are cheap, easy to synthesize, and environmentally friendly. Silicon-based polymers are thermally stable and can be utilized in various applications, such as columns and coatings. Poly(silyl ether)s (PSEs) are an interesting class of silicon-based polymers that are easily hydrolyzed in either acidic or basic conditions due to the presence of the silyl ether Si-O-C bond.
View Article and Find Full Text PDFChemSusChem
May 2024
Key Laboratory of Energy Catalysis and Conversion of Nanchang, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China.
The development of low-cost and high-efficiency catalysts for the hydrolytic dehydrogenation of ammonia borane (AB, NHBH) is still a challenging technology. Herein, ultrafine MoO-doped Ni nanoparticles (~3.0 nm) were anchored on g-CN@glucose-derived nitrogen-doped carbon nanosheets via a phosphate-mediated method.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!