Электронный каталог

Статья

Sipyagina, N.A.
Catalytically Active SiO&sub(2) Aerogels Comprising Chelate Complexes of Palladium / N.A.Sipyagina, Yu.E.Gorshkova, [a.o.] // Molecules [Electronic resource]. – 2024. – Vol. 29, No. 8. – P. 1868. – URL: https://doi.org/10.3390/molecules29081868. – Bibliogr.: 47.

A series of silica-based aerogels comprising novel bifunctional chelating ligands was prepared. To produce target aerogels, two aminosilanes, namely (3-aminopropyl)trimethoxysilane (APTMS) and N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (AEAPTMS), were acylated by natural amino acids ((S)-(+)-2-phenylglycine or L-phenylalanine), followed by gelation and supercritical drying (SCD). Lithium tetrachloropalladate was used as the metal ion source to prepare strong complexes of Pd&sup(2+) with amino acids covalently bonded to a silica matrix. Aerogels bearing chelate complexes retain the Pd&sup(2+) oxidation state after supercritical drying in CO&sub(2), but the Pd ion is reduced to Pd metal after SCD in isopropanol. Depending on the structure of amino complexes, Pd-containing aerogels showed catalytic activity and selectivity in the hydrogenation reactions of C=C, C≡C and C=O bonds.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 44 б - Разделение химических элементов экстракционными и ионообменными методами
Бюллетени = 26/024