Synthetic conditions for the zeolitic octahedral metal oxide based on vanadotungstate are studied. The temperature, time, acidity, W/V ratio, cation species, and concentration affect the resulting materials. The study shows that mixing tungstate and VO2+ in an aqueous solution generates cubane units ([W4O16]8–) at room temperature. The cubane units assemble with VO2+ immediately to form a solid with an amorphous phase and nonporosity, which further crystallizes under a hydrothermal condition to form the crystalline microporous vanadotungstate. The zeolitic vanadotungstates act as effective adsorbents for the separation of propylene/propane. The active materials effectively separate propylene/propane even at high temperatures and high humidities.

Tuning microporosity of crystalline microporous materials is critical for achieving good application performance. Zeolitic ironmolybdate shows both redox property and microporosity, and a redox-triggered microporosity change is investigated. The micropore...

Au nanoparticles are efficient catalysts for selective oxidations. The interaction between Au nanoparticles and supports is critical for achieving high catalytic activity. Herein, Au nanoparticles are supported on a zeolitic octahedral metal oxide based on Mo and V. The charge of Au is controlled by the surface oxygen vacancies of the supports, and the redox property of the zeolitic vanadomolybdate is highly dependent on Au loading. The Au-supported zeolitic vanadomolybdate is used as a heterogeneous catalyst for alcohol oxidation under mild conditions with molecular oxygen as an oxidant. The supported Au catalyst can be recovered and reused without the loss of activity.

Separation of C2 hydrocarbons, C2H6, C2H4, and C2H2, remains significant challenges in chemical industry. However, there are only few adsorbents that can effectively isolate C2 hydrocarbons from their mixtures particularly at a high temperature. Herein, we design a zeolitic octahedral metal oxide based on ϵ‐Keggin polyoxometalates with metal ion linkers. Single gas adsorption of the material shows the different adsorption performances for the C2 hydrocarbons and the strong interaction of the material with the C2 hydrocarbons. Dynamic competitive adsorption experiments show that the material efficiently separates each of the binary C2 hydrocarbon mixtures and even the ternary C2 hydrocarbon mixtures with high selectivity. The material keeps high separation performance even the temperature was increased to 85 °C. The material is stable and is able to be reused without loss of the separation performance.

What is the most significant result of this study?Crystalline transition metal oxides with phosphite are very rare. In this study,wes uccessfully synthesized an unusual 1D tungstophosphite molecular wire by polymerizing [ Is your current researchm ainly curiosity driven (fundamental) or rather applied?Curiosity is the driving force of our research. We first discovered the transition metal oxide molecular wires, [XY 6 O 21 ] n .W ef ound that the central site (X) and surrounding site (Y) of the material are replaceable, which is interesting and attracted our attention. We tried syntheses with many other elements. Finally,p hosphite (P III ) could be successfully incorporated into the central site to form a [HPW 6 O 21 ] n molecular wire. What other topics are you working on at the moment?We currently focus on fully inorganic frameworks based on transition metal oxides. There are two branches of this topic, transition metal oxide molecular wires and zeolitic transition metal oxides. Transition metal oxide molecular wires are 1D inorganic polymers, and the tungstophosphite in this paper is atypical example. Zeolitic transition metal oxides are 3D inorganic networks that are constructed by assembly of polyoxometalate units with inorganic linkers. By combining porous properties and multi-redox properties of transition metal ions, we are producing novel unique porous materials.Invited for the cover of this issue are the groups of Zhenxin Zhang and Wataru Ueda at Kanagawa University,T okyo Institute of Technology, and Hiroshima University.T he image depicts the development of at ungstophosphite molecular wire through the growth of at ree, in which the roots represent the triangular P III O 3 units with tungstate that assemble into the trunk of building blocks and the final wire grows on the branches. Read the full text of the article at