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Abstract: A simple, efficient and low-temperature approach for the assembly of hierarchical Zinc oxide (ZnO) microstructures in ionic liquid [EMIM]+[BF4]− is reported. The as-obtained ZnO superstructures are composed of microbundles of nanorods from the center points, with the diameter and length in the range of 100–150nm and 2–4μm, which have been characterized by X-ray diffraction, scanning and transmission electron microscopy, and photoluminescence spectroscopy. The ZnO microstructures exhibit significant defect-related green-yellow emission and high photodegradation of dye Methyl Orange (5×10−5 mol/L) under UV excitation within 80min. [Copyright &y& Elsevier]

Abstract: Solvothermal reaction assisted with microwave leads to the formation of two unique heterometallic cubic clusters [Ni3 M′(L)3(OH)(CH3CN)3]2·CH3CN (M′=K for 1 and M′=Na for 2, where L is an anion of 2-[(2-hydroxy-3-methoxy-benzylidene)-amino]-ethanesulfonate) with higher efficiency, yields and purity than those without it. The 6-metallacrown-3 [Ni3(OH)(L)3]− groups exhibit interesting ion trapping and self-assembly of size-different Na+ and K+ through form recognition and coordination activity in 1 and 2. The magnetic studies for 1 and 2 suggest that the {Ni3 M′O4} (M′=K and Na) cores both display dominant ferromagnetic interactions from the nature of the binding modes of μ 3-O (oxidophenyl) and μ 3-OH. [Copyright &y& Elsevier]