Various types of aldehydes undergo crossed-Aldol condensation with ketones in the presence of melamine trisulfonic acid (MTSA) under solvent-free conditions. The reported method is mild, efficient and has the advantages such as using heterogeneous catalysis, short reaction times, high yields of the products and the recyclability of the catalyst.

Multilevel statistical entropy analysis (SEA) is a method that has been recently proposed to evaluate circular economy strategies on the material, component and product levels identify critical stages of resource functionality losses. However, comparison technological alternatives may be difficult, equal entropies do not necessarily correspond with recyclability. A coupling energy consumption a...

Abstract Synthetic packaging has excellent performance, but most of them becomes a waste after their use and thus, poses serious concerns to the environment consumer health. Considering current circumstances, demand for sustainable that is either recyclable or biodegradable if discarded increased tremendously in last few years. Cellulose nanofibril (CNF) films are emerging as packaging; however...

The facile surface functionalization of surfactant-free organic microparticles composed of polymeric 2,4,8,10-tetraoxa-3,9-diboraspiro[5.5]undecane allowed us to develop white-light emissive chemosensors for the real-time visual detection of Cu(2+) in HEPES buffer (pH 7.0) due to a synergistic response of fluorophores grafted onto the particles. A detection limit of 15.4 ppb for Cu(2+) in aqueo...