Four mononuclear dysprosium complexes with neutral Schiff-base ligands: syntheses, crystal structures and slow magnetic relaxation behavior.

Four mononuclear 9-coordinate Dy-based complexes, [Dy(HL)(NO)(CHOH)] (1Dy), [Dy(HL)(NO)(HO)] (2Dy), [Dy(HL)(NO)]·CHCN (3Dy), and [Dy(HL)(NO)] (4Dy), have been constructed by neutral Schiff-base ligands (1-[-(4-R)aminomethylidene-2()-naphthalenone, R = -Cl (HL), -NO (HL), -OCH (HL), -I (HL)). By tuning the terminal substituent group of HL ligands, the number of HL ligands coordinated to the central Dy ion unexpectedly varies from 2 to 3, and the local symmetry around the Dy ion reduces from to . Magnetic measurements reveal that 2Dy can display single-ion magnet (SIM) behavior in zero dc field, while 1Dy, 3Dy and 4Dy show field-induced slow magnetic relaxation.

Recent advances in the removal of persistent organic pollutants (POPs) using multifunctional materials:a review.

Persistent organic pollutants (POPs) have gained heightened attentions in recent years owing to their persistent property and hazard influence on wild life and human beings. Removal of POPs using varieties of multifunctional materials have shown a promising prospect compared with conventional treatments. Herein, three main categories, including thermal degradation, electrochemical remediation, as well as photocatalytic degradation with the use of diverse catalytic materials, especially the recently developed prominent ones were comprehensively reviewed.

The degradation of 1,2,4-trichlorobenzene using synthesized Co3O4 and the hypothesized mechanism.

Co(3)O(4) was synthesized with cabbage-like, plate-like and sphere-like morphologies. The effect of different morphologies on the degradation of 1,2,4-trichlorobenzene (1,2,4-TrCB) was evaluated, and the cabbage-like Co(3)O(4) exhibited the highest reactivity. The degradation of 1,2,4-TrCB on the cabbage-like Co(3)O(4) is hypothesized to act competitively via hydrodechlorination and oxygen-attacking pathways.

Development of self-assembled 3D Fe(x)Oy micro/nano materials for application in hexachlorobenzene degradation.

Self-assembled three dimensional (3D) hierarchical, flower-like iron oxide micro/nano materials, including pure Fe3O4, alpha-Fe2O3/Fe3O4 composite and pure alpha-Fe2O3, were developed to degrade hexachlorobenzene (HCB) at 300 degrees C. It was found that pure Fe3O4 exhibited the highest activity with the reaction rate constant at 0.959 min(-1).