A5043310485- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Synthesis and properties of polymers
- Asymmetric Hydrogenation and Catalysis
- Nanomaterials for catalytic reactions
- Advanced Nanomaterials in Catalysis
- Molecular Junctions and Nanostructures
- Microwave-Assisted Synthesis and Applications
- Pharmacological Effects and Toxicity Studies
- Catalytic Cross-Coupling Reactions
- Nanocluster Synthesis and Applications
- MXene and MAX Phase Materials
- Chemical Synthesis and Analysis
- Innovative Microfluidic and Catalytic Techniques Innovation
- Inorganic and Organometallic Chemistry
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Multicomponent Synthesis of Heterocycles
- Surface Chemistry and Catalysis
- Nanofabrication and Lithography Techniques
- Oxidative Organic Chemistry Reactions
- Synthesis and Biological Evaluation
Queen's University
2022-2025
Nano Carbon (Poland)
2024-2025
Queens University
2025
University of Alberta
2021
Atomically precise hydrido gold nanoclusters are extremely rare but interesting due to their potential applications in catalysis. By optimization of molecular precursors, we have prepared an unprecedented N-heterocyclic carbene-stabilized nanocluster, [Au24(NHC)14Cl2H3]3+. This cluster comprises a dimer two Au12 kernels, each adopting icosahedral shape with one missing vertex. The kernels joined through triangular faces, which capped total three hydrides. hydrides detected by electrospray...
Supported gold nanoclusters of the formula [Au13(L)5Cl2]3+ where L = N-heterocyclic carbene (NHC) or phosphine ligands are examined in electrocatalytic CO2 reduction reaction (eCO2RR) a membrane electrode assembly cell configuration. Gold bearing bisNHC shown to exhibit improved catalytic performance compared with diphosphine-stabilized after activation at optimum treatment temperatures. The thermal properties have significant impact on their activity. Thermogravimetric analysis, UV–vis...
Integrated circuits are presently constructed using top-down strategies composed of multiple etching and lithographic steps. As the feature sizes these devices approach single-digit nm scales, existing fabrication methods introduce defects which require further corrective steps rapidly becoming ineffective for industry needs. To meet future scaling requirements, bottom-up leverage differences in local surface environment such as area-selective atomic layer deposition (AS-ALD) promising but...
Metal powders are crucial precursors for manufacturing surfaces through thermal spraying, cold and 3D printing methods. However, surface oxidation of these poses a challenge to the coherence metallic materials during processes. Herein, we introduce method modification copper powder with N-heterocyclic carbenes (NHCs) using mechanochemistry mitigate oxidation. A resonant acoustic mixer was used deposit five different on benzimidazolium hydrogen carbonate trace amount solvent. Significant...
N-heterocyclic carbenes (NHCs) continue to attract interest as novel ligands for self–assembled monolayers on metals due their propensity form strong bonds a variety of metals. However, understanding the effect NHC structural elements adsorption geometry, mobility, and on-surface intermolecular interactions remains limited. Herein we report self-assembly 1,3-diisopropyl imidazolylidene I-NHCiPr Au(111) surfaces. This relatively simple has never previously been examined Au surfaces...
The potential of alkyne-containing NHCs as anchor molecules for electrochemical surface modification is investigated. Using X-ray photoelectron spectroscopy, fluorescence tagging, and shell-isolated enhanced Raman we demonstrate that these can bind effectively to multiple surfaces be functionalized via copper-catalyzed azide-alkyne cycloaddition. Notably, extend this approach beyond metals its applicability glassy carbon. A comparison with diazonium salts shows result in lower...
Copper powder is essential in the thermal spray industry for its excellent and electrical conductivity. However, uncontrolled surface oxide on Cu degrades coating performance by weakening inter-particle bonding....
X-ray photoelectron spectroscopy (XPS) is a frequently employed technique for surface characterization, particularly useful in studying self-assembled monolayers (SAMs). Herein, we examine precursors and SAMs of N-heterocyclic carbenes (NHCs) on gold. We establish reliable reproducible XPS peak-fitting model 1,3-diisopropyl-1H-benzo[d]imidazol-3-ium hydrogen carbonate its CF₃-tagged derivative to enable accurate detection, quantification, chemical analysis NHCs by XPS. The effects molecular...
N-Heterocyclic carbenes (NHCs) are unrivaled in their ability to form persistent and tunable monolayers on noble metal surfaces, with disciplines from heterogeneous catalysis microelectronics fabrication rapidly adopting this technology. It is currently assumed that different NHC monolayer preparation protocols yield equivalent surfaces; however, a direct comparison of the leading synthetic yet validate assumption. Herein, we explore binding ligands gold (Au) surfaces prepared using five...
Even highly planar, polished metal surfaces display varying levels of roughness that can affect their optical and electronic properties, impacting performance in state-of-the-art microelectronics. Current methods for smoothing rough metallic require either the removal or addition substantial amounts material using complex processes are incompatible with 3-dimensional nanoscale features needed applications. We present a vapor-phase process results up to 60% nanometer-scale gold through single...
N-heterocyclic carbenes (NHCs) have been widely studied as ligands for surface chemistry, and shown advantages compared to existing ( e.g. thiols). Herein, we introduce mesoionic (MICs) a new type of ligand.
Even highly planar, polished metal surfaces display varying levels of roughness that can affect their optical and electronic properties, impacting performance in state-of-the-art microelectronics. Current methods for smoothing rough metallic require either the removal or addition substantial amounts material using complex processes are incompatible with 3-dimensional nano-scale features needed applications. We present a vapor-phase process results up to 60% nanometer scale gold through...
Although the functionalization of noble metals with N-heterocyclic carbenes (NHCs) is well-known, interactions these versatile ligands common alloys are not. Herein, we present an immersion-deposition approach that enables modification mild steel (MiS) diisopropylbenzimidazolium hydrogen carbonate (iPrNHC·H2CO3). The NHC-modified surface was characterized by X-ray photoelectron spectroscopy, angle-resolved atomic force microscopy-based infrared time-of-flight secondary ion mass spectrometry,...
Abstract Catalytic iodine in the presence of water acts indirectly as a source Brønsted acid and, concurrently, generates iodonium ion and hydrogen peroxide, which mediate final oxidative aromatization step multicomponent cyclocondensation an aromatic amine two aliphatic aldehyde compounds. The cycle this related iodine‐catalyzed reactions is seldom discussed, generally unoptimized, rarely investigated detail. This work establishes that independent catalytic cycles (H + I − /I ) drive such...
Steels play a vital role in every aspect of day-to-day life. They are major components construction, transportation, medicine, and etc. Despite their larger usability, steels suffering from inevitable corrosion. Hence, finding sustainable solution for corrosion has been hot topic the research field centuries. One extensively studied strategy is applying protective layer on top metals. The recent findings show that N-heterocyclic carbene (NHC) potency to form carbon-metal bond through...