Formation of bicyclic polycyclic aromatic hydrocarbons (PAHs) from the reaction of a phenyl radical with -3-penten-1-yne.

The formation of polycyclic aromatic hydrocarbons (PAHs) on the CH potential energy surface involved in the reactions of a phenyl radical (CH) with -3-penten-1-yne (-CH[triple bond, length as m-dash]C-CH[double bond, length as m-dash]CH-CH, referred to as CH) and its three radicals (CH[triple bond, length as m-dash]C-Ċ[double bond, length as m-dash]CH-CH, CH[triple bond, length as m-dash]C-CH[double bond, length as m-dash]Ċ-CH, and -CH[triple bond, length as m-dash]C-CH[double bond, length as m-dash]CH-ĊH, referred to as the C-, C-, and C-radicals with the same chemical components, CH) assisted by H atoms is investigated by performing combined density functional theory (DFT) and calculations. Five potential pathways for the formation of PAHs have been explored in detail: Pathways I-II correspond to the reaction of CH with CH at the C and C position, and Pathways III-V involve the reaction of CH with the C-, C-, and C-radicals with the assistance of H atoms. The initial association of CH with CH or CH is found to be highly exothermic with only minor barriers (1.

Shape and structure controlling of calcium oxalate crystals by a combination of additives in the process of biomineralization.

The origin of complex hierarchical superstructures of biomaterials and their unique self-assembly mechanisms of formation are important in biological systems and have attracted considerable attention. In the present study, we investigated the morphological changes of calcium oxalate (CaO ) crystals induced by additives including chiral aspartic acid, sodium citrate, Mg, casein and combinations of these molecules. The morphology and structure of CaO were identified with the use of various techniques.

A conductive sodium alginate and carboxymethyl chitosan hydrogel doped with polypyrrole for peripheral nerve regeneration.

Polymer materials with electrically conductive properties have good applications in their respective fields because of their special properties. However, they usually exhibited poor mechanical properties and biocompatibility. In this work, we present a simple approach to prepare conductive sodium alginate (SA) and carboxymethyl chitosan (CMCS) polymer hydrogels (SA/CMCS/PPy) that can provide sufficient help for peripheral nerve regeneration.

Paclitaxel-loaded PLGA microspheres with a novel morphology to facilitate drug delivery and antitumor efficiency.

The aim of this study was to develop a novel morphological paclitaxel (PTX) loaded poly(lactide--glycolide) (PLGA) microspheres (MS) delivery system to enhance drug delivery and antitumor efficiency as well as reduce drug administration frequency. Therefore, different morphological types of PTX-PLGA-MS were prepared using a modified solvent evaporation technique. Morphology analysis confirmed the successful preparation of the smooth PTX-PLGA-MS with internal sporadic porosity, and the novel rough PTX-PLGA-MS with microporous surface and porous internal structures.

Pt nanoparticles decorated rose-like BiOCO configurations for efficient photocatalytic removal of water organic pollutants.

Pt nanoparticles decorated with rose-like BiOCO configurations were synthesized a simple photoreduction method at room temperature. The structure, morphology, optical and electronic properties, and photocatalytic performance of the as-prepared materials were characterized. Compared to pure BiOCO, the Pt/BiOCO photocatalysts show better performance in decomposing RhB, BPA and OTC under visible light ( > 420 nm).

CO Cycloaddition to Epoxides by using M-DABCO Metal-Organic Frameworks and the Influence of the Synthetic Method on Catalytic Reactivity.

A series of high-quality M(BDC)(DABCO) metal-organic frameworks (abbreviated as M-DABCO; M=Zn, Co, Ni, Cu; BDC=1,4-benzene dicarboxylate; DABCO=1,4-diazabicyclo[2.2.2]octane), were synthesized by using a solvothermal (SV) method, and their catalytic activity for the cycloaddition of CO to epoxides in the absence of a co-catalyst or solvent was demonstrated.

Metal-Organic-Framework-Derived Dual Metal- and Nitrogen-Doped Carbon as Efficient and Robust Oxygen Reduction Reaction Catalysts for Microbial Fuel Cells.

porous structure derived from metal-organic frameworks (MOFs) has been developed as a high-performance electrocatalyst for oxygen reduction reaction (ORR). Furthermore, the microbial fuel cell (MFC) device based on the as-prepared Ni/Co and N codoped carbon as air cathode catalyst achieves a maximum power density of 4335.6 mW m and excellent durability.

Mesoporous LiVO/C Submicron-Ellipsoids Supported on Reduced Graphene Oxide as Practical Anode for High-Power Lithium-Ion Batteries.

Despite the enormous efforts devoted to high-performance lithium-ion batteries (LIBs), the present state-of-the-art LIBs cannot meet the ever-increasing demands. With high theoretical capacity, fast ionic conductivity, and suitable charge/discharge plateaus, LiVO shows great potential as the anode material for LIBs. However, it suffers from poor electronic conductivity.

Dependence on material choice of degradation of organic solar cells following exposure to humid air.

Electron microscopy has been used to study the degradation of organic solar cells when exposed to humid air. Devices with various different combinations of commonly used organic solar cell hole transport layers and cathode materials have been investigated. In this way the ingress of water and the effect it has on devices could be studied.

Graphene Oxide Wrapped Amorphous Copper Vanadium Oxide with Enhanced Capacitive Behavior for High-Rate and Long-Life Lithium-Ion Battery Anodes.

is fabricated through a template-engaged redox reaction followed by vacuum dehydration. This material exhibits high reversible capacity, excellent rate capability, and out standing high-rate cyclability. The outstanding performance is attributed to the fast capacitive charge storage and the in situ formed copper with enhanced electrical conductivity.

Raman Spectra of Porous beta-TCP Bioceramics Implanted into Rabbit Femur.

The Raman spectra of porous beta-TCP(beta-tricalcium phosphate)bioceramics implanted into rabbits femur the boundary and rabbit femur were studied using Raman spectroscopy(excited with 514.5nm and 623.8nm laser)and near-infrared FT-Raman spectroscopy.