A5053514060- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Magnetism in coordination complexes
- Lanthanide and Transition Metal Complexes
- Organic and Molecular Conductors Research
- Organometallic Complex Synthesis and Catalysis
- Porphyrin and Phthalocyanine Chemistry
- Molecular Junctions and Nanostructures
- Advanced NMR Techniques and Applications
- Electron Spin Resonance Studies
- Quantum and electron transport phenomena
- Metal complexes synthesis and properties
- Metal-Organic Frameworks: Synthesis and Applications
- Carbon dioxide utilization in catalysis
- Crystal structures of chemical compounds
- Catalytic Cross-Coupling Reactions
- Inorganic Chemistry and Materials
- Microwave-Assisted Synthesis and Applications
- Fluorine in Organic Chemistry
- Crystallography and molecular interactions
- Catalytic C–H Functionalization Methods
- Thermal and Kinetic Analysis
- Synthesis and Characterization of Heterocyclic Compounds
- Combustion and Detonation Processes
- Energetic Materials and Combustion
University of Ottawa
2020-2025
Inducing magnetic coupling between 4f elements is an ongoing challenge. To overcome this formidable difficulty, we incorporate highly delocalized tetrazinyl radicals, which strongly couple with f-block metallocenes to form discrete tetranuclear complexes. Synthesis, structure, and properties of two [(Cp*2 Ln)4 (tz. )4 ]⋅3(C6 H6 ) (Cp*=pentamethylcyclopentadienyl; tz=1,2,4,5-tetrazine; Ln=Dy, Gd) complexes are reported. An in-depth examination their through susceptibility measurements as well...
The combination of the 1,2,4,5-tetrazine (tz) with Ln metallocenes led to a new family radical-bridged dinuclear complexes. Strong magnetic Ln–rad coupling was observed, which afforded zero-field SMM behavior for Tb and Dy analogues.
The magnetic and magneto-optical properties of a tetrazinyl radical-bridged Er
The design of new radical bridging ligands that can effectively promote strong magnetic coupling with Ln(III) ions needs to focus on radicals are susceptible synthetic modifications and bear...
Pyrazine (pyz) has been used extensively in coordination chemistry to manifest electron delocalization mixed-valent compounds and its recent use strongly coupled materials. In the current work, using a YbII precursor: [(C5H4Me)2YbII(THF)2] (1), molecular square [(C5H4Me)2YbIII(pyz•–)]4·½(C7H5F3) (2) was synthesized by metal-ligand redox cooperativity. Complex 2 shows evidence of charge transfer from pyrazine range studies including structural analysis, magnetometry, vibrational spectroscopy,...
One of the strongest Ln-rad magnetic coupling was attained in a family dinuclear Ln metallocenes via trans coordination mode tetrazinyl-based radical bridge, with Tb( iii ) and Dy( analogues exhibiting SMM behaviour.
Probing optical and magnetic properties <italic>via</italic> subtle stereoelectronic effects in mononuclear Dy<sup>III</sup>-complexes.
The first example of unique coordination induced intramolecular pancake bonding was achieved through the reduction two bis(pyrazolyl)-tetrazine ligands.
Reaction of the 1,2,4,5-tetrazine (tz˙-) radical and {Cp*2Tb}+ has yielded a tetranuclear radical-bridged TbIII single-molecule magnet. The strong Ln-radical coupling electronic differences ions in [(Cp*2Tb)4(tz˙-)4]·3C6H6 (1) are probed via magnetic, magneto-optical computational studies.
Over the years, polynuclear cyclic or torus complexes have attracted increasing interest due to their unique metal topologies and properties. However, isolation of organometallic is extremely challenging inherent reactivity, which stems from labile reactive metal-carbon bonds. In this study, pyrazine ligand undergoes a radical-radical cross-coupling reaction leading formation decanuclear [(Cp*)
The first structurally and physically characterized complexes bearing the dianion radical of an s -tetrazine are presented highlight extraordinary ability tetrazines to store more than one electron within their six-membered ring.
Exploration of imidoyl amidine based materials in organic and inorganic chemistry demonstrates the vast applicability these highly versatile frameworks. The account provides a critical overview research progress on complexation ligands.
Reduction of the diamagnetic Ti(III)/Ti(III) dimer [Cl2Ti(μ-NImDipp)]2 (1) (NImDipp = [1,3-bis(Dipp)imidazolin-2-iminato]-, Dipp C6H3-2,6-iPr2) with 4 and 6 equiv KC8 generates intramolecularly arene-masked, dinuclear titanium compounds [(μ-N-η6-ImDipp)Ti]2 (2) {[(Et2O)2K](μ-N-μ-η6:η6-ImDipp)Ti}2 (3), respectively, in modest yields. The have been structurally characterized by X-ray crystallographic analysis, inspection bond metrics within η6-coordinated aryl substituent bridging...
Monoatomic metal wires (MAMW) possess unique physical properties and exciting potential applications. In particular, Ni MAMW has been predicted to be ferromagnetic. However, the inherent instability of due Peierls distortion phenomenon renders its fabrication isolation extremely difficult. Here we fabricate monatomic through columnar self-assembly tribenzocyclyne (TBC) derivatives. Three types MAMWs have constructed: I, II III with average Ni–Ni distances 0.480, 0.342, 0.336 nm, which were...
Abstract Over the years, polynuclear cyclic or torus complexes have attracted increasing interest due to their unique metal topologies and properties. However, isolation of organometallic is extremely challenging inherent reactivity, which stems from labile reactive metal‐carbon bonds. In this study, pyrazine ligand undergoes a radical‐radical cross‐coupling reaction leading formation decanuclear [(Cp*) 20 Dy 10 (L1) ] ⋅ 12(C 7 H 8 ) ( 1 ; where L1 = anion 2‐prop‐2‐enyl‐2 ‐pyrazine; Cp*...
A new series of high energy density materials were synthesized by combining the oxalyldihydrazinium (H2ODH2+) dication with 5,5′-tetranitro-2,2′-bi-1H-imidazolate (TNBI2–), 5,5′-diamino-4,4′-dinitramino-3,3′-bi-1,2,4-triazolate (ANAT2–) and bis[3-(5-nitroimino-1,2,4-triazolate)] (BNT2–) dianions. These fully characterized nuclear magnetic resonance (1H 13C) infrared spectroscopy, gas pycnometry, thermogravimetric analysis differential scanning calorimetry. In addition, crystal structures...
Abstract Inducing magnetic coupling between 4 f elements is an ongoing challenge. To overcome this formidable difficulty, we incorporate highly delocalized tetrazinyl radicals, which strongly couple with ‐block metallocenes to form discrete tetranuclear complexes. Synthesis, structure, and properties of two [(Cp* 2 Ln) (tz . ) ]⋅3(C 6 H (Cp*=pentamethylcyclopentadienyl; tz=1,2,4,5‐tetrazine; Ln=Dy, Gd) complexes are reported. An in‐depth examination their through susceptibility measurements...
Reduction of the diamagnetic Ti(III)/Ti(III) dimer [Cl2Ti(μ-NImDipp)]2 (1) (NImDipp = [1,3-bis(Dipp)imidazolin-2-iminato]-, Dipp NC6H3-2,6-Pri2) with 4 and 6 equiv KC8 generates intramolecularly arene-masked, dinuclear titanium com-pounds [(μ-N-μ-η6-ImDipp)Ti]2 (2) {[(Et2O)2K](μ-N-μ-η6:η6-ImDipp)Ti}2 (3), respectively, in modest yields. The compounds have been structurally characterized by X-ray crystallographic analysis inspection bond metrics within η6-coordinated aryl substituent bridging...
Contemporary lifestyle is interwoven with technological achievements which implement the use of permanent magnets. Polynuclear lanthanide single-molecule magnets (SMMs) lack strong magnetic communication renders design high-performing SMMs as an ongoing challenge. To overcome this, incorporation radical pyrazine (pyz•-) linkers between lanthanides a compelling approach. Careful tuning synthetic conditions led to dinuclear [(Cp*2LnIII)2(pyz•-)(THF)2][BPh4]‧Et2O (Ln = Gd (1), Dy (2), Cp*...