Lanthanum-calcium bimetallic-modified attapulgite- chitosan hydrogel beads for efficient phosphate removal from water: Performance evaluation, mechanistic and life cycle assessment.

Phosphorus is a critical factor in the control of eutrophication. We developed a three-dimensional porous, bimetallic-modified adsorbent La-Ca-CS/ATP to remove excess phosphate from water. Langmuir model showed that the theoretical adsorption capacity of La-Ca-CS/ATP was up to 123 mg P/g.

Lanthanum modified chitosan-attapulgite composite for phosphate removal from water: Performance, mechanisms and applicability.

A novel lanthanum-modified-chitosan-attapulgite (La-CTS-ATP) composite with efficient adsorption of phosphate in water was prepared and characterized. The adsorption properties were investigated by adsorption kinetics, adsorption isotherms and thermodynamics. An orthogonal design test was used to explore the optimal preparation conditions of La-CTS-ATP.

Syntheses of tetrahydroquinoline-based chiral carbene precursors and the related chiral NHC-Au(i) complex.

Four tetrahydroquinoline-based chiral carbene precursors were synthesized using unsymmetrical ,'-diarylformamidines and chiral 2-allyloxiranes as starting materials. A representative NHC-gold complex has been prepared and fully characterized, the crystal structure of which reveals an intramolecular Au⋯H-C(sp) interaction between Au(i) and the hydrogen atom of the isopropyl moiety in the -aryl group.

NIS/PhI(OAc)2-mediated diamination/oxidation of N-alkenyl formamidines: facile synthesis of fused tricyclic ureas.

Facile synthesis of bicyclic ureas by NIS/PhI(OAc)2-mediated diamination/oxidation of N-alkenyl formamidines is reported. Bulky aromatic groups such as 2,6-diisopropylphenyl and mesityl and alkyl groups were tolerated towards the process. Several control experiments have been performed, and the reaction outcomes indicate that the oxidation process is probably concerted with the diamination cyclization, and succinimide generated from NIS-mediated aminoamidiniumation step promoted the PhI(OAc)2-mediated oxidation step.

Metal-free aminoamidiniumation employing N-iodosuccinimide: facile syntheses of bicyclic imidazolidiniums and cyclic vicinal diamines.

NIS-mediated aminoamidiniumation has been developed for the syntheses of bicyclic imidazolidinium salts, which could be readily converted into cyclic vicinal diamines.