The cover picture shows a series of aluminum alkoxide and alkyl complexes modified by piperazidine-bridged bis(phenolate) ligands, which were used with great success for the ring-opening polymerization (ROP) of ��-caprolactone (ε-CL), a renewable resource due to their biodegradability/biocompatibility. All of these complexes were fully characterized including X-ray structural determination. More details are discussed in the article by Yao et al. on page 609–615.

An electrochemical immunosensor for α-fetoprotein (AFP) was fabricated based on the platform of gold nanoparticles (GNP)/graphene (Gr)-prussian blue (PB) and 1,1′-ferrocenedicarboxylic acid (FcDA)-anti-AFP as label.

A photo-responsive protein chip constructed by oriented and crosslinked multilayer bacteriorhodopsins (BR) immobilized on a gold microarray.

H₂O₂ could injure Vero significantly and reduce cell viability in a time-dependent manner and in a concentration-dependent manner. Cell injury resulted in the increase of both the amount of CaOxa crystals and the degree of crystal aggregation on the injured cells, which will promote the formation of calcium oxalate monohydrate (COM) crystals, thus increasing the risk of formation of urinary stone.

Ni(OH)₂ nanoflowers and MWCNTs were mixed to fabricate electrochemical sensors for the detection of hydrogen peroxide (H₂O₂). Different from most of other electrochemical sensors, the constructed MWCNTs/Ni(OH)₂ composites electrode exhibited wide linear detection range (0.2–22 mmol/L) of hydrogen peroxide.

A new PN9FPA films were electrochemically synthesized on ITO anode in BFEE at low potential. The polymer showed a better thermal stability. And the resulting polymer could be used as a good blue light emitter. In addition, PN9FPA was a chirality polymer.

The supermolecular based on sodium molybdate(VI) and sulfate, dibenzo-18-crown-6 was synthesized in acetonitrile and characterized by elemental analysis, IR, ¹H NMR, single crystal X-ray diffraction, indicating that it contains [S₂Mo₁₈O₆₂]⁴⁺ and [Na(DB18C6)(H₂O)]⁺, where each sodium ion is deviated from the plane defined by the oxygen atoms in the corresponding crown ether. The compound crystallizes in the monoclinic space group C2/c with a=3.29332(10) nm, b=1.90917(6) nm, c=2.63132(7) nm, β=121.6630(10)°, V=14081.8(7) nm³, Z=8, T=293(2) K, and R₁ (wR₂)=0.0177 (0.1525). The compound exhibits a novel organic-inorganic structure, in which the crown ether-sodium complexes are coordinated to the terminal oxygen atoms of Mo₁₈O₅₄ and the oxygen atoms of water molecule.

A highly selective synthesis of 2-aryl-1-arylmethyl-1H-1,3-benzimidazoles from the reaction of o-phenylenediamine and aromatic aldehydes in the presence of silica-bonded propyl-S-sulfonic acid (SBSSA) at 80°C in water in good to excellent yields was developed.

Two new transition metal dicyanamide complexes [Co₂(tppz)(dca)₄]·CH₃CN (1) and [Co(tptz)(dca)(H₂O)](dca) (2) were synthesized and structurally characterized. Magnetic susceptibility measurement indicates that there are antiferromagnetic couplings between adjacent metal ions in 1 (T>29 K, ( =−9.78 K, C=4.92 cm³·K·mol⁻¹) and ferromagnetic couplings in 2 (T>150 K, ( =7.97 K, C=2.59 cm³·K·mol⁻¹) respectively.

The binding modes of amidinophenylporphyrins were recorded and lifetimes of luminescence were measured as a function of the nature to understand the interaction with DNA by the fluorescence spectra.

IR-CO spectra may be good characterization method to distinguish between core-shell and alloy PdPt nanoparticles.

Mn(II), Co(II), Ni(II) and Cu(II) complexes with 1-(((5-mercapto-1H-1,2,4-triazol-3-yl)imino)-methyl)naphthalene-2-ol have been synthesized and characterized by elemental analysis, IR, ¹H NMR, EI-mass, UV-Vis, and ESR (electron spin resonance) spectra, molar conductance, magnetic moment measurements, DC conductivity and thermogravimetric analysis. The structures of the complexes have also been theoretically studied by using the molecular mechanic calculations. The Schiff-base ligand and its metal complexes have also been screened for their antimicrobial activities.

A stir bar sorptive extraction (SBSE) technique was developed by the use of polypyrrole (PPy) sorbent, electropolymerized on the surface of a rod, as a possible alternative to solid-phase microextraction (SPME). Liquid desorption was subsequently employed to transfer the extracted analytes into the injection port of a gas chromatography-mass spectrometry (GC-MS). The PPy sorbent including polypyrrole-dodecyl sulfate (PPy-DS) was deposited on the surface of a stainless steel rod from the corresponding aqueous electrolyte by applying a constant deposition potential. The developed method was applied to the trace level extraction of BTEX from aqueous sample.

An interesting flourophore, 4-(2,5-dimethoxyphenylmeth elene)-2-phenyl-5-oxazolone (DMPO) was synthesized by mixing an equivalent molar quantity of hippuric acid and 2,5-dimethoxybenzaldehyde in acetic anhydride in the presence of anhydrous sodium acetate. The absorption and fluorescence characteristics of 4-(2,5-dimethoxyphenylmethelene)-2-phenyl-5-oxazolone (DMPO) were investigated in different solvents. DMPO dye exhibits red shift in both absorption and emission spectra as solvent polarity increases, indicating change in the dipole moment of molecules upon excitation due to an intramolecular charge transfer interaction.

Nickel-cobalt oxide nano-flakes material, which has a spherical flower-like structure, was successfully synthesized by a facile chemical co-precipitation method followed by a simple calcination process. The as-prepared nickel-cobalt oxide possesses markedly enhanced charge-discharge properties compared with the pure NiO and pure Co₃O₄. The electrochemical capacitive properties of the as-prepared nickel-cobalt oxide were studied in detail.

Novel amphiphilic molecules consisting of a rigid 2-phenylthiophene core, with a polar flexible tri(oxylethylene) moiety attached to the phenyl ring and one or two alkyl chains attached to the thiophene ring at the other side have been synthesized by using Ni(II) and Pd(0) catalyzed coupling reaction as key steps. The tri(oxylethylene) moieties were terminated with hydroxyl group, sodium carboxylate group and lithium carboxylate group respectively. The thermotropic and solvent induced liquid crystalline behavior of these substances was investigated by polarized optical microscopy, differential scanning calorimetry and X-ray diffraction.

Application of the Suzuki cross-coupling reaction for efficient synthesis of diverse substituted biaryl-chromen-4-ones using an optimized palladium(0) catalyst system is reported. The coupling of arylboronic acids with the resin-bound bromoflavanones which were prepared by organoselenium-induced regioselective intramolecular cyclization of bromo-2-hydroxylchalcones proceeded smoothly.

A one-pot two-step reactions of Cu-catalyzed three-component reactions of isoquinoline (quinoline), acetylenedicarboxylate with alkynylbenzene and Pd-catalyzed intramolecular C(sp)-C(sp²) coupling reactions yielded a series of pyrrolo[2,1-a]isoquinoline and pyrrolo[1,2-a]quinoline derivatives.

Hierarchical ZSM-5 was prepared from diatomite by in situ zeolitization. The optimize crystallization condition was 443 K for 24 h with OH⁻/SiO₂=0.33. DZSM-5 zeolite exhibits an enhanced aromatization performance and coke deposition resistance.

Series of aluminum alkoxide and alkyl complexes stabilized by piperazidine-bridged bis(phenolato) ligands were synthesized and well characterized. It was found that these aluminum complexes are active initiators for ???ε????-caprolactone polymerization.

A convenient and alternative procedure for the synthesis of sugar orthoesters from glycosyl bromides with anhydrous sodium acetate as base under ultrasound irradiation is described. Various sugar and sugar-sugar orthoesters were prepared in 70%–91% isolated yields.

A simple, rapid and sensitive high performance liquid chromatography (HPLC) method was developed for the determination of metoclopramide in pharmaceutical preparation. The method is based on the derivatization of metoclopramide with fluorescamine. The separation was achieved on a C₁₈ column using methanol-water (70:30, V/V) mobile phase. Fluorescence detector was used at the excitation and emission of 403 and 485 nm, respectively.

An efficient click synthesis of 1,2,3-triazole derivatives from benzyl halides or alkyl halides, epoxides, terminal alkynes, and sodium azides in the presence of copper salts and relative benzimidazole salts has been developed. This procedure eliminates the need to handle potentially organic azides, which are generated in situ. A broad spectrum of substrates can participate in the process effectively to produce the desired products in good yields.

This paper illustrated holistic metabolizing profile of the extract of Radix aconiti in vitro and possible metabolizing reaction type of main DDAs, which could provide reference for finding out potential bioactive components in the extract and the prescription of Chinese Medicine.

A simple and selective method was developed for the preconcentration, separation, and determination of trace amounts of As(III) in an aqueous solution by solid phase extraction combined with graphite furnace atomic absorption spectrometry. Activated carbon (AC) was modified by sodium diethyldithiocarbamate (NaDDTC) and then used as a new, stable and easily prepared solid sorbent in a mini column for the extraction of As(III) in aqueous solution.

A series of novel 4,4′-arylmethylene-bis(1H-pyrazole-5-ol)s were synthesized from lignin and screened for their in vitro antioxidant activities. The compounds exhibited good DPPH and ABST⁺ radical scavenging activities as compared to Trolox.

The present rule of dominant reaction channel of the cycloaddition reaction between singlet silylene silylene (H₂SiSi:) and acetone is that the [2+2] cycloaddition reaction of the two π-bonds in silylene silylene (H₂SiSi:) and acetone leads to the formation of a four-membered ring silylene. Because of the unsaturated property of Si: atom in four-membered ring silylene, it further reacts with acetone to form a silicic bis-heterocyclic compound.

A series of new organic semiconductors based on s-indaceno[1,2-b:5,6-b′]dithiophene-4,9-dione was successfully synthesized and characterized. These new materials exhibit high photo-stability and good solubility in common organic solvents. Compounds 1c and 1d exhibit liquid crystalline phases and crystallize with the rigid coplanar systems packed into slipped face-to-face π-stacks.

A new soluble phthalocyaine 1(4),8(11),15(18),22(25)-tetra-(methoxy-phenoxy)phthalocyanine (MPPc) was synthesized and verified. The organic light-emitting diodes (OLEDs) were fabricated based on MPPc. Room-temperature near infrared (NIR) electroluminescence (EL) was observed near 891 nm that effectively covered the ?rst optical communication window near 850 nm.

This paper reports a practical and green method for the acetalization of carbonyl compounds as pentaerythritol diacetals and diketals derivatives using cellulose sulfuric acid as a biodegradable and reusable solid acid catalyst under thermal solvent-free conditions.

The catalytic activity of β-cyclodextrin immobilized on Dowex resin as an efficient solid-liquid phase transfer catalyst was developed for the synthesis of alkyl thiocyanates and phenacyl derivatives in water.

Nanosized MCM-41-SO₃H based on ordered mesoporous silica material with a covalent sulfonic acid group was synthesized and used as acid catalyst for the new, simple, convenient and green synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetra-substituted imidazoles. Also some of synthesis products are new. Echo-friendly protocol, short reaction times, easy and quick isolation of the products and excellent yields are the main advantages of this procedure.

The combination of isatin, barbituric acid, and cyclohexane-1,3-dione derivatives in the presence of alum (KAl(SO₄)₂·12H₂O) as a catalyst for 15 min was found to be a suitable and efficient method for the synthesis of spiro[chromeno[2,3-d]pyrimidine-5,3′-indoline]-tetraones.

Quinoline-8-oxy-acetate acid (8-qoacH) reacts with M(II) (M=Pb and Cd) to give rise to two coordination complexes [Pb(8-qoac)₂] (1) and [Cd(8-qoac)(bdc)_0.5(H₂O)₂] (2) under hydrothermal conditions. They are characterized by single-crystal X-ray diffraction, IR, elemental, thermal analyses and luminescent analysis. The Pb metal centers connect the 8-qoac anions to form a 1D linear chain in 1. In 2, two symmetrical [Cd(8-qoac)(H₂O)₂] are bridged by a 1,4-bdc²⁻ to generate a coordination unit [Cd(8-qoac)(bdc)_0.5(H₂O)₂], and all the units are further connected to a 2D supramolecular layer-like structure via hydrogen bonds.

BiOBr is not a stable compound. It transforms to plate-like Bi₂₄O₃₁Br₁₁ at around 750°C and the formed Bi₂₄O₃₁Br₁₁ can further convert to rod-like α-Bi₂O₃ at around 850°C. The photocatalytic activity of these bismuth oxybromide and oxides follows the order: BiOBr/Bi₂₄O₃₁Br mixture>BiOBr>Bi₂₄O₃₁Br>α-Bi₂O₃. The change in photocatalytic activity could be attributed to the different light absorption ability and microstructures of the photocatalysts.

The Density function B3LYP method has been used to optimize the geometries of the luteolin, thymine and luteolin-thymine complexes at 6-31+G∗︁ basis. Seventeen complexes are found.

A facile and efficient synthesis of new 1,4-dihydropyridine derivatives was reported via Hantzsch three-component condensation reaction of aldehydes or formylphenylboronic acids, ethyl acetoacetate, and ammonium acetate in the presence of a catalytic amount of triethylamine under solvent-free conditions. The method described here offers several advantages including high yields, short reaction times, and simple work-up procedure.