Cheng-Ling Pan

First transition metal coordination compound supported on metal–oxygen cluster with bicapped quasi-Keggin structure: [Cu(en) 2 (H 2 O)] 4 [Cu(en) 2 ] 3.5 [PMo VI 8 V IV 6 O 42 Cu(en)(1,10 ′ -phen)] 3 ·14H 2 O

Abstract A novel compound, [Cu(en)2(H2O)]4[Cu(en)2]3.5[PMoVI8VIV6O42Cu(en)(1,10′-phen)]3·14H2O 1 (en = ethylenediamine, phen = phenanthroline), was synthesized hydrothermally (170 °C, 10 days, autogeneous pressure) and characterized by IR, ESR, elemental analyses and X-ray crystallography. The results of structure determination show that compound 1 contains three different structure cluster anions [PMoVI8VIV6O42]7− supporting complex cation [Cu(en)(1,10′-phen)]2+, in which one cluster anion possesses typical bicapped Keggin structure, while other two polyanions only have bicapped quasi-Keggin structures, and [Cu(en)(1,10′-phen)]2+ is linked through oxygen atoms to different V positions of two bicapped quasi-Keggin units.

A novel 3-D chiral coordination polymer: hydrothermal synthesis and structural characterization of [Co 3 (μ 3 -OH)(μ 5 -btc)(μ 6 -Hbtc)(H 2 O) 3 ·6H 2 O] n

Abstract A chiral 3-D open-framework coordination polymer [Co3(μ3-OH)(μ5-btc)(μ6-Hbtc)(H2O)3·6H2O]n was successfully obtained from the mixture of Co(CH3COO)2·4H2O, H3btc (where H3btc=benzene-1,2,4-tricarboxylic acid), NaOH and H2O under hydrothermal condition, which contains a novel and unprecedented coordination mode of btc (see Scheme 1 Download : Download high-res image (32KB) Download : Download full-size image Scheme 1 . Coordination modes of btc in the compounds having been synthesized. I, μ4-btc (in the literature [9] ); II, μ6-btc and III, μ5-btc (see this paper). ).

Hydrothermal synthesis, influencing factors and excellent photocatalytic performance of novel nanoparticle-assembled Bi25FeO40 tetrahedrons

Novel nanoparticle-assembled Bi25FeO40 (BFO) tetrahedrons with relatively good dispersion were successfully synthesized through a facile, mild and rapid hydrothermal process. The phases and morphologies of the samples were characterized by powder X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), high resolution transmission electron microscopy (HRTEM) and scanning electron microscopy (SEM). Such sillenite-type BFO tetrahedrons were found to be fabricated by abundant nanoparticles with single crystalline nature. Some influencing factors including reaction time, temperature and the amount of additives (e.g., polyacrylamide, sodium citrate and sodium hydroxide) were revealed to play crucial roles in the generation of this BFO nanoarchitecture. Moreover, the visible light-driven photocatalytic activities of the BFO products were investigated.

Novel Bi12ZnO20–Bi2WO6 heterostructures: facile synthesis and excellent visible-light-driven photocatalytic activities

Novel sillenite-type Bi12ZnO20–Bi2WO6 heterostructure photocatalysts were successfully prepared via a controllable partial precipitate conversion strategy, employing previously-prepared Bi2WO6 nanosheets as precursors of Bi3+. The phases and morphologies of the products were characterized by powder X-ray diffraction, energy dispersive spectrometry, X-ray photoelectron spectroscopy, high resolution transmission electron microscopy and scanning electron microscopy. Compared to the sample (Bi12ZnO20 + Bi2WO6) obtained by physical mixing technology and the single-component photocatalyst (Bi12ZnO20 and Bi2WO6), such sillenite-type Bi12ZnO20–Bi2WO6 heterostructures exhibited higher visible-light-driven photocatalytic activity, which could be ascribed to matching band positions and intimate interfacial contact between different components that could benefit the efficient separation of photo-generated carriers.

Morphology-controllable synthesis of novel Bi25VO40 microcubes: optical properties and catalytic activities for the reduction of aromatic nitro compounds

In the present paper, novel Bi25VO40 microcubes with relatively good dispersion have been fabricated via a facile, fast and mild hydrothermal synthesis strategy. The morphology and compositional characteristics of the Bi25VO40 sample were characterized by various testing techniques including powder X-ray diffraction (XRD), inductively coupled plasma-atomic emission spectroscopy (ICP-AES), FT-IR spectroscopy, energy dispersive spectrometry (EDS), X-ray photoelectron spectroscopy (XPS), high resolution transmission electron microscopy (HRTEM) and scanning electron microscopy (SEM). Several experimental parameters including synthesis temperature, time and the amount of additives (e.g., polyacrylamide, sodium citrate and sodium hydroxide) were discovered to play vital roles in the construction of these Bi25VO40 microcrystals. From the UV-vis diffuse reflectance spectrum (DRS) of the Bi25VO40 its band gap was calculated to be 2.42 eV. The photoluminescence (PL) spectrum showed that Bi25VO40 microcubes had two obvious emission peaks centered at 458 and 639 nm. Moreover, catalytic experiments showed that the as-prepared Bi25VO40 microcubes possessed superior catalytic performance for the conversion of 4-nitrophenol (4-NP) and 4-nitroaniline (4-NA) in the presence of excess NaBH4 solution.

A two-dimensional framework of novel vanadium clusters bridged by [Ni(en)2]2+: K{V12IVV6VO42Cl[Ni(en)2]3}·8H2O

The hydrothermal reaction of V2O5, H2C2O4·2H2O, en, KOH and NiCl2·6H2O gives a new two-dimensional open-framework solid; the extended structure consists of a two-dimensional network formed by the interconnection of each [V18O42Cl] cage to four other neighboring units via six [Ni(en)2]2+ bridging groups.

Three-Dimensional open-framework cobalt–molybdenum phosphate by hydrothermal synthesis: (C2H9N2)4(C2H10N2)[Co3Mo4P4O28]

Abstract The new three-dimensional open-framework cobalt(II) molybdenum(VI) phosphate, (C2H9N2)4(C2H10N2)[Co3Mo4P4O28] 1, has been prepared by the reaction of sodium molybdate, phosphoric acid and ethylenediamine with Co2+ salts. The crystal data for 1 are as follows: Tetragonal, space group I4(1)/a, a=17.088(2) A, c=10.745(2) A V=3137.7(9) A 3 , Z=4. The structure of 1 is constructed from CoMo2P tetrahedral units connected by CoO4 tetrahedra through sharing corners. The connectivity leads to the formation of intersecting channels in all three crystallographic directions, resembling an aluminosilicate zeolite, and the channels are filled with charge-compensating ethylenediamine ions.

The synthesis and structural characterization of a novel layered compound [Na0.5FeMoH1.5O5]n

Abstract Single crystal of [Na0.5FeMoH1.5O5]n has been hydrothermally (160 °C, 72 h, autogeneous pressure) synthesized and characterized by IR, EPR, XPS, elemental analyses and single-crystal structural analysis which reveals the compound consists of host Mo–O–Fe polymeric layers, and guest Na+ cations between the layers.

Structural and theoretical studies of a new Cu I -Cu I complex bearing bulky unsymmetrical benzamidinate Ligand

Density functional theory(DFT) calculations unambiguously verify that there is little or no direct metal-metal bonding in the dinuclear copper(I) benzamidinate complex [Cu2(LRR′)2](2){LRR′=[PhC(NR)(NR′)]−(R= 2,6-iPr2C6H3, R′=SiMe3)} with a short Cu-Cu distance[0.24454(4) nm].

Computational bottom-up design of ytterbium(II) complex with pyridyl amido ligand

Having been designed via bottom-up strategy based on density functional theory(DFT) calculations, a complex of ytterbium(II) with pyridyl amido ligand was successfully synthesized by one-pot reaction in laboratory. DFT calculation shows that pyridyl amido ligands can stabilize the complex via steric and electron effect. This success in integrating computation with synthesis will inspire more explorations in the development of a new complex in lanthanide chemistry.