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Materials Letters
Volume 313, 2022, 131682

Mechanism of liquid-phase metal infiltration into pyridine-containing polymeric thin films

Aislan Esmeraldo Paivaa, Jhonattan Frank Baez Vasqueza, Tatiana S. Perovab, Fernanda G.L. Medeiros Borsaglic, Michael Morrisa

Aislan Esmeraldo Paiva esmerala@tcd.ieAMBER/School of Chemistry, Trinity College Dublin, Dublin, Ireland.

Abstract

This research studied the liquid-phase selective metal infiltration of a pyridine-containing block copolymer (BCP). The results demonstrated that the metal cations interact differently with the poly(2-vinylpyridine) in polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP); the oxidation state and type of cation play an important role in the infiltration process, which is also affected by the solvent. Silver (Ag+) did not present an effective infiltration, while nickel (Ni2+) and chromium (Cr3+) were able to reproduce the pattern of the BCP. These differences can be associated with the coordination of the pyridinic nitrogen and the metal, in parallel with π-interactions. Furthermore, in the case of chromium, the presence of oxyanions led to an improved infiltration and high fidelity on the formation of the ordered metal oxide layer.

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