Hybrid Alginate-Brushite Beads Easily Catalyze the Knoevenagel Condensation On-Water.

ABSTRACT: An innovative hybrid organic-inorganic material composed of alginate-brushite xerogel beads was successfully applied for the catalysis of the Knoevenagel condensation. The catalyst was derived from phosphated alginate xerogel microspheres formed from the ionotropic gelling effect of phosphated alginate. To this end, alginate was phosphated by the addition of diammonium hydrogen phosphate in a 1% w/w alginate gel. The phosphated alginate was subsequently precipitated by chelation of Ca²⁺ cations, generating a phosphated alginate hydrogel microsphere, which was washed and dried, forming hybrid organic-inorganic xerogel beads as a crystalline phosphate-rich mineral fraction covered by alginate. X-ray diffraction analysis revealed that the crystalline inorganic matrix of the materia

SUBMITTER: El Jemli Y 

PROVIDER: S-EPMC9386701 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature