Poly(4-vinylpyridine) as ligand for Au(I) and Zn(II) cations: luminescent metal-containing polymers

Abstract

The poly-dentate ligand poly(4-vinylpyridine) (P4VP, M w ≈ 60,000 g mol −1) reacts with (Me 2 S)AuCl or ZnCl 2 yielding white polymers with empirical formula (PVP)(AuCl) 0.4 and (PVP)(ZnCl 2) 0.7. Upon excitation with UV light, both metal-containing materials feature luminescence. Emissions of (P4VP)-AuCl are based on aurophilic interactions whereas for (P4VP)-ZnCl 2 , an excitation wavelength-dependent luminescence could be observed. The latter behavior can be explained by the formation of aggregated species with different excitation energies. For comparison, the model compound (Etpy)AuCl (Etpy = 4-ethylpyridine) is prepared and structurally characterized. The solid-state structure reveals that no aurophilic or π-π interactions are present. The compound does not show photoluminescence. The solid-state structure of the disproportionation product (Etpy)AuCl 3 has been determined as well.

Entanglement-Enhanced Water Dissociation in Bipolar Membranes with 3D Electrospun Junction and Polymeric Catalyst

“…The use of P4VP as water dissociation catalyst also has advantages in terms of catalyst immobilization at the junction. Several studies have reported the risk of catalyst leakage (leaching) when utilizing heavy metal salts as catalysts for water dissociation, , while P4VP has the capability of forming a coordination complex with several metal salts, such as ZnCl 2 and AuCl 3 …”

“…Several studies have reported the risk of catalyst leakage (leaching) when utilizing heavy metal salts as catalysts for water dissociation, 25,42 while P4VP has the capability of forming a coordination complex with several metal salts, such as ZnCl 2 and AuCl 3 . 43 Besides the homogeneous dispersion at the junction, the concentration of the catalyst also affects the water dissociation performance of the membrane. In general, an increase in the concentration of the polymeric catalyst will lead to a more effective water splitting BPM due to the increase in catalytic active sites.…”

Copper(II) complexes bearing cyclobutanecarboxylate and pyridine ligands: a new series of dinuclear paddle-wheel complexes

“…For 1 and 2, π-π* transitions of the pyridine moieties are found at ~ 255 nm (Figs. 1, S6) [16,17]. For 3 and 4, these absorptions are shifted to 261-271 nm with additional short wavelength bands at 212-217 nm (Figs.…”

Recent advances in metallopolymer-based drug delivery systems

“…Their properties can be adjusted by changing the interaction strength of metal centers with the polymer backbone. [44][45][46][47][48] MPs are highly interesting materials with properties combining the technological advantages of polymers with the functionality of metal centers, therefore, these compounds have outstanding potential for use in a broad range of advanced sustainable applications including functional materials, [49][50][51][52][53][54][55] catalysis and biocatalysis, [56][57][58][59][60][61][62][63] electroactive, 64 photoactive, [65][66][67][68][69][70] conducting 71 and magnetic 45 materials, as well as environment 72 and nanomaterials science. [73][74][75][76][77][78][79][80] MPs have been known for a long time but have recently become the subject of large development.…”