Results 21 to 30 of about 487,676 (263)

Iodine-catalyzed diazo activation to access radical reactivity

Nature Communications, 2018
Radical reactivity of diazo compounds, useful organic building blocks, is yet underexplored. Here, the authors report an iodine-catalyzed radical activation of diazo compounds affording a variety of substituted cyclopropanes, pyrroles and epoxides under ...
Pan Li, Jingjing Zhao, Lijun Shi, Jin Wang, Xiaodong Shi, Fuwei Li   +5 more
doaj   +1 more source

Impact of Physico-Chemical Properties of Cellulose Nanocrystal/Silver Nanoparticle Hybrid Suspensions on Their Biocidal and Toxicological Effects

Nanomaterials, 2021
There is a demand for nanoparticles that are environmentally acceptable, but simultaneously efficient and low cost. We prepared silver nanoparticles (AgNPs) grafted on a native bio-based substrate (cellulose nanocrystals, CNCs) with high biocidal ...
Dafne Musino, Julie Devcic, Cécile Lelong, Sylvie Luche, Camille Rivard, Bastien Dalzon, Gautier Landrot, Thierry Rabilloud, Isabelle Capron   +8 more
doaj   +1 more source

Polyoxometalate-Based Catalysts for CO₂ Conversion

Molecules, 2019
Polyoxometalates (POMs) are a diverse class of anionic metal-oxo clusters with intriguing chemical and physical properties. Owing to unrivaled versatility and structural variation, POMs have been extensively utilized for catalysis for a plethora of ...
Yanwei Cao, Qiongyao Chen, Chaoren Shen, Lin He   +3 more
doaj   +1 more source

Graphitic phosphorus coordinated single Fe atoms for hydrogenative transformations

Nature Communications, 2020
Phosphorus ligands have been extensively used in metal complexes for homogeneous catalysis. Here, the authors broaden this scope to heterogeneous catalysis by preparing a P-coordinated Fe single atom catalyst with excellent catalytic performance in ...
Xiangdong Long, Zelong Li, Guang Gao, Peng Sun, Jia Wang, Bingsen Zhang, Jun Zhong, Zheng Jiang, Fuwei Li   +8 more
doaj   +1 more source

Chemical State of Complex Uranium Oxides [PDF]

Physical Review Letters, 2013
We report here the first direct observation of U(V) in uranium binary oxides and analyze the gradual conversion of the U oxidation state in the mixed uranium systems. Our finding clarifies previous contradicting results and provides important input for the geological disposal of spent fuel, recycling applications and chemistry of uranium species.
Kvashnina, K. O., Butorin, S. M., Martin, P., Glatzel, P.   +3 more
openaire   +3 more sources

Theoretical investigations of oxygen vacancy effects in nickel-doped zirconia from ab initio XANES spectroscopy at the oxygen K-edge

Beilstein Journal of Nanotechnology, 2022
In this study, we present theoretical X-ray absorption near-edge structure (XANES) spectra at the K-edge of oxygen in zirconia containing Ni dopant atoms and O vacancies at varying concentrations.
Dick Hartmann Douma, Lodvert Tchibota Poaty, Alessio Lamperti, Stéphane Kenmoe, Abdulrafiu Tunde Raji, Alberto Debernardi, Bernard M’Passi-Mabiala   +6 more
doaj   +1 more source

Oxidation States: Intrinsically Ambiguous?

ACS Central Science
The oxidation state ( OS ) formalism is a much-appreciated good in chemistry, receiving wide application. However, like all formalisms, limitations are inescapable, some of which have been recently explored. Providing a broader context, we discuss the OS and its interpretation from a computational perspective for transition metal (TM) complexes.
Isaac F. Leach, Johannes E. M. N. Klein
openaire   +4 more sources

Synthesis of a molecularly defined single-active site heterogeneous catalyst for selective oxidation of N-heterocycles

Nature Communications, 2018
Synthesis of molecularly defined single-active site catalytic materials is the key to bridging the gap between homogeneous and heterogeneous catalysis.
Yujing Zhang, Shaofeng Pang, Zhihong Wei, Haijun Jiao, Xingchao Dai, Hongli Wang, Feng Shi   +6 more
doaj   +1 more source

The XPS study of physical and chemical forms of neptunium group on the surface of minerals [PDF]

Nuclear Technology and Radiation Protection, 2010
The sorption behavior and the physical and chemical forms of neptunium on the surface of minerals of the two chlorate samples, biotite and kaolin, with different contents of Fe(II) was studied.
Teterin Anton Yu., Mikhailina Alevtina V., Maslakov Konstantin I., Zaharova Elena V., Teterin Yury A.   +4 more
doaj   +1 more source

Unraveling the Effects of Melt–Mantle Interactions on the Gold Fertility of Magmas

Frontiers in Earth Science, 2020
The oxidation state of the Earth’s mantle and its partial melting products exert a key control on the behavior and distribution of sulfur and chalcophile and siderophile elements between the mantle and crust, underpinning models of ore deposit formation.
Santiago Tassara, Santiago Tassara, Santiago Tassara, Martin Reich, Martin Reich, Brian A. Konecke, Brian A. Konecke, José María González-Jiménez, Adam C. Simon, Diego Morata, Diego Morata, Fernando Barra, Fernando Barra, Adrian Fiege, Manuel E. Schilling, Alexandre Corgne   +15 more
doaj   +1 more source