Authors:

Iliyas Iznat

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About Paper:

Metal chalcogenide clusters, with a basic formula of M6E8L6 or M3E3HL5 in the case of nickel (M-transition metal, E - Se, S, or Te, L- ligand), have applications in fields ranging from electronics and energy storage to catalysis. The cluster core is formed and stabilized by the ligands. The composition of the cluster core and the ligands used can alter the magnetic properties, and the thermal and electrical conductivity of the material will vary based on the composition of the cluster core and the ligands attached to the core. It is often difficult to directly synthesize these clusters with certain ligands, so synthesizing clusters and then exchanging the ligands bound to the clusters is a promising alternative approach for cluster synthesis. For this project, we want to substitute two monodentate phosphine ligands in cobalt and nickel clusters with a single bidentate diphosphine ligand. The ligand exchange will be monitored by electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS) and peak assignments will be made based on accurate mass to charge ratio and isotope distribution. By starting with different monodentate phosphine ligands bound to the cluster, different substitution results with the diphosphine ligand are expected because of the initial ligand's size and its bonding energy with the metal. Collision- induced dissociation (CID) will be used to reveal information about the clusters' stability with different ligand attachments. Overall, the project investigates synthesis, kinetics, and fragmentation of these clusters whose electromagnetic and catalytic properties are of interest. Keywords: Metal Chalcogenide Clusters; Ligand Exchange; Bidentate Ligands; Diphoshpine

Source:

Purdue University / 2025

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Co-authors:

Iliyas Iznat