Jianshan Chen

Structural Diversity of Infinite 3d―4f Heterometallic Cluster Compounds Driven by Various Lanthanide Radii

The syntheses, structures, and characterization of six Ln(3+)-Cu(2+)-glycine (Hgly) coordination polymers are described in this paper. They represent three types of structures. Type I (Ln=La (1), Pr (2), and Sm (3)) is a 1D catenarian polymer comprising [Ln(2)] nodes bridged by four cis-Cu(gly)(2) linkers. Type II (Ln=Eu (4) and Dy (5)) is a 2D open framework with a 4(4)-net, composed of novel [Ln(6)Cu(22)] cluster nodes linked by trans-Cu(gly)(2) linkers. Furthermore, the inner structures of the [Ln(6)Cu(22)] nodes, and the connection mode between the nodes and linkers are slightly different for 4 and 5. Type III (Ln=Er (6)) is a 3D open framework with a novel 3(6)4(18)5(3)6 topology, made up of [Er(6)Cu(24)] cluster nodes and trans-Cu(gly)(2) linkers. The rich variety of the resulting structures owes itself mainly to the interselection between the dynamic control of metalloligands and cationic components. A transition from frequency dependence to frequency independence is observed in the field-induced magnetization lag for 1-3. The frequency dependence at low temperatures may come from the antiferromagnetic Cu--Cu interaction through the [Ln(2)] nodes, whereas the frequency independence may be due to the disappearance of the antiferromagnetic Cu--Cu interaction at high temperatures.

Synthesis and crystal structure of two new heterometallic thioantimonates(III) [Ni(pda)2]CuI4SbIII2S6 and [Ni(dien)2]CuISbIII3S6,

Two different dimensional inorganic–organic hybrid heterometallic sulfide, [Ni(pda)2]Cu4Sb2S6 (1) and [Ni(dien)2]CuSb3S6 (2) were obtained by using 1,2-propanediamine (pda) and diethylenetriamine (dien) as the ligand, respectively.

Visible light-induced degradation of acetone over SO42―/MoOx/MgF2 catalysts

A visible light active photodegration catalyst was prepared by doping MoO(3) into MgF(2) matrix. The addition of SO(4)(2-) into MoO(x)/MgF(2) could improve the catalytic activity greatly and an acetone conversion of 96.1% under visible light was obtained on the SO(4)(2-)/5%MoO(x)/MgF(2) (SMM) catalyst. By BET, XRD, Raman, FT-IR, XPS, UV-vis technology the specific area, structure and photoadsorption ability of the catalysts were characterized. The high photocatlaytic activity of the SMM catalyst is attributed to its large specific area, the high dispersal of MoO(3) domains in MgF(2) and the inhibiting effect of MgF(2) matrix on the electron-hole pair recombination.