Results 21 to 30 of about 1,402,532 (353)

A strongly fluorescent NiII complex with 2-(2-hydroxyethyl)pyridine ligands: synthesis, characterization and theoretical analysis and comparison with a related polymeric CuII complex

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2018
The synthesis and characterization of diaquabis[2-(2-hydroxyethyl)pyridine-κ2N,O)nickel(II) dinitrate, [Ni(C7H9NO)2(H2O)2](NO3)2, under ambient conditions is reported and compared with catena-poly[[bis[2-(2-hydroxyethyl)pyridine-κ2N,O]copper(II)]-μ ...
Ouahida Zeghouan   +4 more
doaj   +1 more source

A Prediction for the Conversion Performance of H2S to Elemental Sulfur in an Ionic-Liquid-Incorporated Transition Metal Using COSMO-RS

open access: yesChemistry, 2022
In the present study, the conversion performance of hydrogen sulfide (H2S) to elemental sulfur in ionic-liquid-incorporated transition metals (ILTMs) is predicted using a conductor-like screening model for realistic solvents (COSMO-RS).
Nor Fariza Abd Mutalib   +3 more
doaj   +1 more source

Re-evaluation of manganese solubility as affected by soil sample preparation in the laboratory

open access: yesBrazilian Archives of Biology and Technology, 2005
Laboratory experiments were conducted to re-evaluate the effects of drying and the time between drying and Mn analysis on soil Mn solubility using maize seedlings as test plant.
Emilene Andrade   +3 more
doaj   +1 more source

Synthetic Zeolites Modified with Salts of Transition Metals in the Reaction of Chemisorption-catalytic Oxidation of Sulphur Dioxide by Air Oxygen

open access: yesChemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2021
The effect of the nature and concentration of d-metal salts attached to synthetic zeolites NaA and KA on the kinetic and stoichiometric parameters of the chemisorption-catalytic oxidation of sulphur dioxide with air oxygen at ambient temperature was ...
Tatyana Rakitskaya   +2 more
doaj   +1 more source

Systematics of the Third Row Transition Metal Melting: The HCP Metals Rhenium and Osmium

open access: yesCrystals, 2018
The melting curves of rhenium and osmium to megabar pressures are obtained from an extensive suite of ab initio quantum molecular dynamics (QMD) simulations using the Z method.
Leonid Burakovsky   +3 more
doaj   +1 more source

METAL-INSULATOR TRANSITIONS IN TRANSITION METAL OXIDES

open access: yesLe Journal de Physique Colloques, 1971
There is a transition from band insulator to metal to Mott insulator with increasing number of d electrons in the transition metal oxides. In the (V1-xCrx)2O3 system a Mott transition occurs near x = 0.01. At high temperatures V2O3 and (V.99Cr.01)2 O3 are found to have similar resistivities and temperature coefficients of resistivity.
Mcwhan, D., Menth, A., Remeika, J.
openaire   +2 more sources

Magnetic anisotropy of graphene quantum dots decorated with a ruthenium adatom

open access: yesBeilstein Journal of Nanotechnology, 2013
The creation of magnetic storage devices by decoration of a graphene sheet by magnetic transition-metal adatoms, utilizing the high in-plane versus out-of-plane magnetic anisotropy energy (MAE), has recently been proposed. This concept is extended in our
Igor Beljakov   +5 more
doaj   +1 more source

Electronic Structure and Chemical Bonding of the First-, Second-, and Third-Row-Transition-Metal Monoborides: The Formation of Quadruple Bonds in RhB, RuB, and TcB

open access: yesMolecules, 2023
Boron presents an important role in chemistry, biology, and materials science. Diatomic transition-metal borides (MBs) are the building blocks of many complexes and materials, and they present unique electronic structures with interesting and peculiar ...
Constantinos Demetriou   +3 more
doaj   +1 more source

The Rearrangement of Alkylallenes to 1,3-Dienes

open access: yesReactions, 2022
1,3-Dienes are vital building blocks in organic synthesis. They underpin many fundamental synthetic transformations and are present in numerous natural products and drug candidate molecules.
Yassir Al-Jawaheri, Marc Colin Kimber
doaj   +1 more source

Recent advances in transition-metal-catalyzed intermolecular carbomagnesiation and carbozincation

open access: yesBeilstein Journal of Organic Chemistry, 2013
Carbomagnesiation and carbozincation reactions are efficient and direct routes to prepare complex and stereodefined organomagnesium and organozinc reagents.
Kei Murakami, Hideki Yorimitsu
doaj   +1 more source

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