scholarly journals Hybrid organic–inorganic mononuclear lanthanoid single ion magnets

2019 ◽  
Vol 55 (99) ◽  
pp. 14992-14995 ◽  
Author(s):  
Walter Cañón-Mancisidor ◽  
Matias Zapata-Lizama ◽  
Patricio Hermosilla-Ibáñez ◽  
Carlos Cruz ◽  
Diego Venegas-Yazigi ◽  
...  
Keyword(s):  
Coordination Chemistry ◽  
Slow Relaxation ◽  
Design And Synthesis ◽  
First Time

The plasticity of the coordination chemistry of lanthanoid ions has allowed the design and synthesis for the first time of a family of mononuclear hybrid organic–inorganic lanthanoid complexes with slow relaxation of the magnetization.

Mechanisms and models for homogeneous copper mediated ligand exchange reactions of the type: CuNu + ArX → ArNu + CuX

1985 ◽  
Vol 63 (1) ◽  
pp. 111-120 ◽  
Author(s):  
Christiane Couture ◽  
Anthony James Paine
Keyword(s):  
Molecular Design ◽  
Nucleophilic Aromatic Substitution ◽  
Common Mechanism ◽  
Aromatic Substitution ◽  
Exchange Reactions ◽  
Design And Synthesis ◽  
Alkyl Groups ◽  
Leaving Group ◽  
First Time ◽  
Redox Equilibria

The title reactions are an important class of copper mediated nucleophilic aromatic substitution processes, which constitute a useful tool in the molecular design and synthesis of small molecules. We report the results of extensive investigation of these processes, primarily focussing on cyanodeiodination (ArI + CuCN → CuI + ArCN). Among the interesting features of these processes are: (a) an unusual rate equation involving autocatalysis by CuI product; (b) retardation by both excess nucleophile (as KCN) and excess leaving group (as KI), which compete with ArX to complex with CuNu; (c) only cuprous nucleophiles are active (ligand exchanged products from cupric salts arise from prior redox equilibria which form CuNu); (d) the halogen effect is large (kI ~ 40–100 kBr ~ 300–5000kCl) but the Hammett ρ value is zero; (e) ortho-alkyl groups do not hinder the reaction (and actually cause mild acceleration by relief of steric strain). Finally, the introduction of an ortho-COO− group accelerates the reaction by a factor of 104–105, but the general features of the accelerated reactions are also the same, again indicating a common mechanism, with entropic acceleration by ortho-carboxylate. Both kinetic and thermodynamic factors were considered in detail, the latter apparently for the first time. Applications to practical syntheses are considered, and novel mechanistic models for these interesting processes are discussed.

New o-substituted diphenylphosphinic amide ligands: synthesis, characterization and complexation with Zn2+, Cu2+ and Y3+

2019 ◽  
Vol 43 (35) ◽  
pp. 13881-13890 ◽  
Author(s):  
Antônia Carlene Rodrigues Furtado Medeiros ◽  
Marcos Martins Gouvêa ◽  
Thaian Vieira Felipe ◽  
Flávia Ferreira de Carvalho Marques ◽  
Alice Maria Rolim Bernardino ◽  
...  
Keyword(s):  
Coordination Chemistry ◽  
Design And Synthesis ◽  
Amide Ligands ◽  
Amide Derivatives ◽  
Significant Attention

Phosphinic amide derivatives have drawn significant attention in coordination chemistry and have been incorporated into the design and synthesis of new ligands.

Synthetic Access to a Novel Binaphthyl Ligand Bearing a Phosphine and a Triazole Donor Site

2009 ◽  
Vol 64 (11-12) ◽  
pp. 1438-1448 ◽  
Author(s):  
Claudia May ◽  
Yu Sun ◽  
Gotthelf Wolmershäuser ◽  
Werner R. Thiel
Keyword(s):  
Crystal Structure ◽  
Coordination Chemistry ◽  
Structure Analysis ◽  
Donor Site ◽  
Crystal Structure Analysis ◽  
Pure Compound ◽  
Enantiomerically Pure ◽  
X Ray ◽  
First Time

The combination of a diphenylphospinyl and a triazol-3-yl unit was realized for the first time at a 1,1'-binaphthyl backbone. This novel type of P,N-ligand is accessible as an enantiomerically pure compound in just a few steps. First experiments on the coordination chemistry with palladium(II) chloride have been carried out. A series of intermediates and a binuclear palladium(II) complex could be characterized by X-ray crystal structure analysis

Rational design and synthesis of LiTi2(PO4)3−xFx anode materials for high-performance aqueous lithium ion batteries

2017 ◽  
Vol 5 (2) ◽  
pp. 593-599 ◽  
Author(s):  
Huaiqing Wang ◽  
Hongzhang Zhang ◽  
Yi Cheng ◽  
Kai Feng ◽  
Xianfeng Li ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Performance ◽  
Rational Design ◽  
Lithium Ion ◽  
High Rate ◽  
Rate Performance ◽  
Design And Synthesis ◽  
First Time ◽  
High Rate Performance

A F− doping strategy was adopted for the first time to achieve both high rate performance and less hydrogen evolution of the LTP anode in aqueous lithium ion batteries.

scholarly journals Building a Shp: A New Rare-Earth Metal-Organic Framework and Its Application in a Catalytic Photo-Oxidation Reaction

2020 ◽  
Author(s):  
Victor Quezada-Novoa ◽  
Hatem M. Titi ◽  
Amy Sarjeant ◽  
Ashlee Howarth
Keyword(s):  
Rare Earth ◽  
Sulfur Mustard ◽  
Metal Organic Framework ◽  
Earth Metal ◽  
Photo Oxidation ◽  
Design And Synthesis ◽  
Concordia University ◽  
Metal Organic ◽  
First Time ◽  
Ethyl Sulfoxide

The design and synthesis of new metal–organic frameworks (MOFs) is important from both a fundamental and application standpoint. In this work, a novel, highly‐connected rare‐earth (RE) MOF with shp topology is reported, named RE‐CU‐10 (RE = rare‐earth, CU = Concordia University), comprised of nonanuclear RE(III)‐cluster nodes and tetratopic pyrene‐based linkers. This represents the first time that the 1,3,6,8‐tetrakis(p‐benzoic acid)pyrene (H4TBAPy) linker is integrated in the shp topology. Y‐CU‐10 was explored as a heterogeneous photocatalyst for the selective oxidation and detoxification of a sulfur mustard simulant, 2‐chloroethyl ethyl sulfide (2‐CEES), showing a halflife for conversion to the less toxic 2‐chloroethyl ethyl sulfoxide (2‐CEESO) of 6.0 min.<br>

scholarly journals Building a Shp: A New Rare-Earth Metal-Organic Framework and Its Application in a Catalytic Photo-Oxidation Reaction

2020 ◽  
Author(s):  
Victor Quezada-Novoa ◽  
Hatem M. Titi ◽  
Amy Sarjeant ◽  
Ashlee Howarth
Keyword(s):  
Rare Earth ◽  
Sulfur Mustard ◽  
Metal Organic Framework ◽  
Earth Metal ◽  
Photo Oxidation ◽  
Design And Synthesis ◽  
Concordia University ◽  
Metal Organic ◽  
First Time ◽  
Ethyl Sulfoxide

The design and synthesis of new metal–organic frameworks (MOFs) is important from both a fundamental and application standpoint. In this work, a novel, highly‐connected rare‐earth (RE) MOF with shp topology is reported, named RE‐CU‐10 (RE = rare‐earth, CU = Concordia University), comprised of nonanuclear RE(III)‐cluster nodes and tetratopic pyrene‐based linkers. This represents the first time that the 1,3,6,8‐tetrakis(p‐benzoic acid)pyrene (H4TBAPy) linker is integrated in the shp topology. Y‐CU‐10 was explored as a heterogeneous photocatalyst for the selective oxidation and detoxification of a sulfur mustard simulant, 2‐chloroethyl ethyl sulfide (2‐CEES), showing a halflife for conversion to the less toxic 2‐chloroethyl ethyl sulfoxide (2‐CEESO) of 6.0 min.<br>

Manganese Phthalocyanine Coordination Chemistry: Recent Results and Present Status

1997 ◽  
Vol 01 (04) ◽  
pp. 355-366 ◽  
Author(s):  
O. V. DOLOTOVA ◽  
N. I. BUNDINA ◽  
O. L. KALIYA ◽  
E. A. LUKYANETS
Keyword(s):  
Coordination Chemistry ◽  
Electrochemical Reduction ◽  
High Purity ◽  
Present Status ◽  
Equilibrium Mixture ◽  
Redox Potentials ◽  
Organic Bases ◽  
Axial Ligands ◽  
Reduction And Oxidation ◽  
First Time

A number of substituted manganese phthalocyanines ( PcMn ), which are easily soluble in organic solvents, have been synthesized with good yields (up to 76%) and high purity. PcMn with manganese +2 oxidation state without axial ligands was obtained for the first time and thoroughly characterized. It was shown that PcMn forms, PcMn III X , PcMn II or [ LPcMn III]2 O , depending on substituents nature, can be stable in usual conditions. It was found that some PcMn II derivatives can be oxidized by water to PcMn III OH . The stages of substituted PcMn electrochemical reduction and oxidation have been studied and the correlation of redox potentials with electronic properties of substituents has been established. For the first time, the idea has been proposed and confirmed that PcMn II, when treated by organic bases in solution forms an equilibrium mixture of three electronic isomers — Pc +· Mn I, PcMn II and Pc −· Mn III. A new scheme of PcMn photoreactions has been proposed and the possibility of using PcMn as a model of a photosystem component has been discussed. All the data are summarized in the complete scheme of photo and dark transformations between valence and coordination PcMn derivatives in solution.

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