Ultra-fast self-healing PVA organogels based on dynamic covalent chemistry for dye selective adsorption

Ultra-fast self-healing organogels based on dynamic covalent chemistry for dye adsorption were prepared from polyvinyl alcohol (PVA), 4-formylphenylboronic acid (FPBA), and tartaric acid dihydrazide (TDH) by an effective situ reaction approach. The relative xerogels can adsorb methylene blue selectively with high efficiency. The boronate ester bonds and acylhydrazone bonds endow organogels a very fast self-healing property. What’s more, the chirality can be transferred from TDH to the organogels. The organogels obtained from L-TDH and D-TDH hold opposite chirality according to circular dichroism spectra.