Synthesis and characterization of tricarbonyl(trimethylenemethane)iron complexes: crystal structure of (2-methylene-6-p-nitrobenzoyloxy-heptan-1,3-diyl)Fe(... A series of substituted tricarbonyl(trimethylenemethane)-iron complexes were prepared by functionalization of (3-butenyltrimethylenemethane)Fe(CO)...
The strong Lewis acid [Et2Al]+ catalyzes the reduction of carbon dioxide with hydrosilanes under mild conditions to methane. In benzene solution, the side ... M Khandelwal,P?J Wehmschulte - 《Angewandte Chemie International Edition》 被引量: 121发表: 2012年 Deoxygenative Reduction of Carbon...
2.1.3. Flame structure imaging The actual flame images were captured using a digital camera (SONY SLT-A35) with a resolution of 3568 × 2368 pixels. The camera was set with an aperture of f/2 and an exposure time of 1/25 s. To examine the heat release zone of the flames, an intens...
Asymmetric synthesis of N-bridged [3.3.1] ring systems by phosphonium salt/Lewis acid relay catalysis Article Open access 18 January 2022 Data availability All data generated and analysed during this study are included in this Article and its Supplementary Information. They are also available fro...
Yttrium is one of the most abundant rare-earth elements, has a high coordination number (8 and 10) and belong to hard Lewis acids (on the basis of soft-hard acid-base theory) which is beneficial to coordinate with carboxylate ligand (hard Lewis base) to form MOF with good stability [36...
Phytoplankton and thermal structure in the upper ocean: Consequences of nonuniformity in chlorophyll profile Solar irradiance absorption in the upper layers of the ocean is influenced by the concentration of phytoplankton. Nonuniformities in vertical chlorophyll (... MR Lewis,JJ Cullen,T Platt - 《Jo...
The preservation of the Beta zeolite structure during synthesis is confirmed by X-ray diffraction (XRD) patterns (Fig. S12) and N2 adsorption–desorption isotherms (Fig. S13). For Ni/dBeta NP, diffraction patterns for NiO were observed. Ni loading is consistent across all samples, ranging fro...
(y\)direction. The resulting structure has a surface area as 4.1232 nm × 3.5768 nm. Two clay sheets are separated by a fixed distance to represent kaolinite nanopore and the Al-O plane is the inner plane of pore. The schematic representation of kaolinite nanopore is shown in Fig.2...
Adsorption of pyridine (Py) results in appearance of strong bands at 1621 and 1453 cm−1, which might be attributed to the Py adsorption over strong Lewis acid sites31. The Lewis acid sites were attributed to unsaturated Zn2+ions. No Brönsted acidity associated to HPW was observed in...
The application of biochar can also increase plant growth by improving soil physical, chemical, and biological properties, including the soil structure, nutrient availability, and water and nutrient retention27,28. Biochar is an excellent source of organic matter to add to soil because it acts as ...