Search results for "ion chemistry"
showing 10 items of 254 documents
s-Block metal scorpionates – A new sodium hydrido-tris(3,5-dimethyl-1-pyrazolyl)borate salt showing an unusual core stabilized by bridging and termin…
2020
Abstract Dissolution of [(μ-Me2CO)3(NaTp*)2] (1) (Tp* = hydrido-tris(3,5-dimethyl-1-pyrazolyl)borate) in DMSO at room temperature leads to the growth of colourless crystals characterized as the new salt [Na2Tp*(μ-Me2SO)3(Me2SO)3] [NaTp* 2] (2). 2 crystallized in the trigonal space group R3 with Z = 3, a = 14.1227(2) Å, b = 14.1227(10) Å, c = 33.9685(2) Å, and V = 5867.35(17) Å3. Interestingly, anion and cation of 2 both contain the Tp* ligand. Moreover, the cationic moiety highlights an unusual sodium atom hexacoordinated by six DMSO molecules acting as O-bonded ligands. Three of which exhibit a bridging coordination mode and three are in terminal position. To the best of our knowledge, the…
Coordination Polymers
2018
Este documento ha sido elaborado en el marco de un proyecto de Renovación de Metodologías Docentes concedido por el servicio de Formación Permanente de la Universitat de Valencia (UV-SFPIE_RMD17-725369) Este documento forma parte de la asignatura Química Inorgánica Avanzada impartida en el Máster Universitario en Química This document is part of the course Advanced Inorganic Chemistry belonging to the Master in Chemistry
Recent Achievement and Perspectives in Synchrotron Radiation X-Ray Absorption Spectroscopy
2003
During the last 20 years, x-ray absorption spectroscopy (XAS) has found extensive application in the materials science [1, 2, 3]. solution chemistry [4], biology [5]. therapeutic chemistry [6] and geochemistry. However. it is relatively recently XAS methods have been utilized for measurements on archaeological materials [7,8].
A Route toward (Aminomethyl)cyclopentadienide Ligands and Their Group 4 Metal Complexes
2018
International audience
Nouveaux complexes organométalliques monocyclopentadiényles de lanthanides
2005
Complexes hémimétallocéniques de lanthanides early
2005
Chelation of toxic metals: from fundamental advances in macrocyclic chemistry to extracting materials
2016
Exposure to lead-contaminated tap water is a persistent issue in many western countries. In the context of the 98/83/EU directive, we got involved in the design of a cartridge-based purification system that could be mounted directly on a kitchen faucet. Solid-phase extraction by covalent attachment of a lead-selective sequestering agent to the surface of silica gel was thought as an efficient method to reduce the lead level below the new parametric value, as shown by pipe-loop tests.1 High binding affinity, selectivity, and fast uptake kinetics are of crucial importance. This fine-tuning was most conveniently achieved by taking advantage of the outstanding coordination properties displayed …
Photophysical Investigation of Iron(II) Complexes Bearing Bidentate Annulated Isomeric Pyridine-NHC Ligands
2020
The possibility of achieving luminescent and photophysically active metal-organic compounds relies on the stabilization of charge transfer states and kinetically and thermodynamically blocking non-...
Towards Iron(II) Complexes with Octahedral Geometry: Synthesis, Structure and Photophysical Properties
2020
The control of ligand-field splitting in iron (II) complexes is critical to slow down the metal-to-ligand charge transfer (MLCT)-excited states deactivation pathways. The gap between the metal-centered states is maximal when the coordination sphere of the complex approaches an ideal octahedral geometry. Two new iron(II) complexes (C1 and C2), prepared from pyridylNHC and pyridylquinoline type ligands, respectively, have a near-perfect octahedral coordination of the metal. The photophysics of the complexes have been further investigated by means of ultrafast spectroscopy and TD-DFT modeling. For C1, it is shown that&mdash
Polyamines and applications. A look at the first workshop in linear and cyclic polyamines chemistry
2008
Given their versatile coordination properties, cyclic and linear polyamines are the subject of numerous worksin many research groups. This great interest is mainly related to their use in diverse fields such as removalof metals from liquids, purification of gases, application in catalysis, in sensors, as well as in various probesfor medical applications. This paper summarizes recent results obtained by the French research groupswhich attended the first ìworkshop in linear and cyclic polyamines chemistryî.