Evaluation of Heteroleptic Pt (II) β-Diketonate Complexes as Precatalysts for the Photoactivated Curing of Silicone Resins

Abstract

A library of platinum (II) complexes of general formula (O,O′-β-diketonate)PtLX (L = dimethylsulfoxide, pyridine, triphenylphosphine; X = chloride, γ-acetylacetonate) has been prepared, using synthetic methodologies available in the literature. The library has been supplemented with a novel platinum (II) complex bearing a triazenido N-oxide ligand. The complexes have been characterized and tested as precatalysts for the photoactivated curing of silicone resins. Correlations have been established between the nature of the employed ligands, the ultraviolet-visible (UV-Vis) absorption spectrum of the complexes and their catalytic performance, which enable the tailored preparation of complexes with improved performance in view of possible technological applications.

Platinum(II) Phenylpyridyl Schiff Base Complexes as Latent, Photoactivated, Alkene Hydrosilylation Catalysts

“…Photoactivated catalysts for the hydrosilylation of multifunctional Si–H and vinyl polymers to give cross-linked silicones are of particular interest as they give temporal control as well as the potential for increased shelf life of premixed catalyst/substrate mixtures. − Some important applications of such catalysts come from the production of fast-curing films and in additive or continuous manufacturing processes . Ideally such systems combine high precatalyst stability in the silane/vinyl polymer mixture (latency) with rapid photoactivation, to afford an active catalyst that works at low loadings with fast rates of turnover.…”

Crafting Versatile Modes of Pt(II) Complexes with Flexidentate Pyridyl‐β‐diketones: Synthesis, Structural Characterization, and Catalytic Behavior in Olefin Hydrosilylation

“… Different variants of coordination in Pt(II) complexes with N ‐ and O ‐donor ligands incorporating acetylacetone and pyridine moieties [11a–d,12] …”

Preparation of magnetically separable and low-cost MC-FePd3 NPs with enhanced catalytic activity in the reduction of p-nitrophenol

“…Microbial carbon-loaded metal catalytic materials (MC-MCMs) are a new type of nanocatalytic materials that has been rapidly developed in recent years. MC-MCMs have great advantages, such as rich active sites, excellent metal conductivity and easy functionalization which has attracted widespread attention in the fields of energy storage, electrocatalysis and environmental remediation (Wei et al 2016, Zhang et al 2017, Shen et al 2019, Karoń et al 2022, Moro et al 2022. However, the long culture cycle, harsh culture conditions and high cost of the active strains limit the utilization of MC-MCMs (Mukherjee et al 2017, Zhang et al 2022a.…”