Results 31 to 40 of about 558,651 (312)

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

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

Electrochemical oxidation of oxalic acid and hydrazinium nitrate on platinum in nitric acid media [PDF]

, 2012
Several studies in the literature have investigated the electrochemical effects of oxalic acid and hydrazine on various materials in neutral (pH buffered to 7), basic or weakly acidic media (pH 6).
Tzedakis, Théodore, Queffelec, Benoit, Ode, Denis, Rockombeny, L.C., Féraud, Jean-Pierre   +4 more
core   +1 more source

SWERN Oxidation. Transition State Theory is OK

, 2023
We investigate the model originally used to compare deuterium kinetic isotope effects (KIE) computed for the intramolecular hydrogen transfer step in the mechanism of the Swern oxidation of alcohols to aldehydes with those measured.
D. Christopher, Braddock, Siwoo, Lee, Henry S., Rzepa   +2 more
core   +1 more source

Oxidation state analysis of LiFeSixP1-xO4/C (x = 0.06) with X-ray absorption near edge structure (XANES) in Fe K-edge and Si K-edge

Journal of Physics: Theories and Applications, 2021
The development of LiFePO4 as a cathode materials on lithium-ion battery was increased with the use of additional techniques such as atomic doping and coating.
Sahara Hamas Intifadhah, Vera Laviara Maghfirohtuzzoimah, Pelangi Az-zahra, Wantana Klysubun, Fahmi Astuti, Mochamad Zainuri, Darminto Darminto   +6 more
doaj   +1 more source

Kinetic modelling of phenols consumption during polyethylene thermal oxidation [PDF]

, 2013
Irganox 1010 stabilized PE was monitored by carbonyl build-up and DSC under oxygen. A scheme for PE stabilization by phenols was implemented and its kinetic parameters were calculated from experimental results.
RICHAUD, Emmanuel
core   +1 more source

Organophosphorus Compound Formation Through the Oxidation of Reduced Oxidation State Phosphorus Compounds on the Hadean Earth

, 2023
Reduced oxidation state phosphorus compounds may have been brought to the early Earth via meteorites or could have formed through geologic processes. These compounds could have played a role in the origin of biological phosphorus (P, hereafter) compounds.
Gull, Maheen, Abbott-Lyon, Heather, Bracegirdle, Joe, Feng, Tian, Pasek, Matthew A.   +4 more
core   +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

Oxidation-State-Dependent Reactivity and Catalytic Properties of a Rh(I) Complex Formed from a Redox-Switchable Hemilabile Ligand

, 2016
The synthesis and characterization of a phosphinoalkylarene, redox-switchable hemilabile ligand (RHL), (η5-C5H5)Fe(η5-C5H4C6H4OCH2CH2PPh2) (1), are reported.
Chad A. Mirkin (16519), Ilia A. Guzei (1296237), Arnold L. Rheingold (1274736), Caroline S. Slone (2978865), Glenn P. A. Yap (1325514)   +4 more
core   +1 more source