Reduction-immobilizing strategy of polymer-embedded sub-2 nm Cu nanoparticles with uniform size and distribution responsible for robust catalytic reactions.

Polymer-embedded metal nanoparticles are in great demand owing to their unique features, leading to their use in various important applications, including catalysis reactions. However, particle sintering and aggregation are serious drawbacks, resulting in a drastic loss of catalytic activity and recyclability. Herein, a reduction-immobilizing strategy of polymer-embedded sub-2 nm Cu nanoparticles offered highly controlled distribution and nanoparticle size within polymer structures with high fidelity.

Quantitative Determination of Pitavastatin in Tablets Using FTIR and RP-HPLC Analysis: A Comparative Study.

Background: Fourier Transform Infrared (FTIR) spectroscopy and reverse phase highperformance liquid chromatography, RP-HPLC analysis have been used for the quantitative determination of local l commercially available Pitavastatin products.

Methods: The FTIR method of analysis is not widely used in pharmaceutical quality control laboratories. This technique is non-destructive, reliable, precise, and efficient, and the samples can be prepared easily.

Concurrent Oxidation-Reduction Reactions in a Single System Using a Low-Plasma Phenomenon: Excellent Catalytic Performance and Stability in the Hydrogenation Reaction.

The catalytic activity and stability of metal nanocatalysts toward agglomeration and detachment during their preparation on a support surface are major challenges in practical applications. Herein, we report a novel, one-step, synchronized electro-oxidation-reduction "bottom-up" approach for the preparation of small and highly stable Cu nanoparticles (NPs) supported on a porous inorganic (TiO@SiO) coating with significant catalytic activity and stability. This unique embedded structure restrains the sintering of CuNPs on a porous TiO@SiO surface at a high temperature and exhibits a high reduction ratio (100% in 60 s) and no decay in activity even after 30 cycles (>98% conversion in 3 min).

Wide angle X-ray diffraction patterns and 2D-correlation spectroscopy of crystallization in proton irradiated poly(ether ether ketone).

Proton irradiated poly (ether ether ketone) (PEEK) films were crystallized to different extents, and subsequently characterized by wide angle X-ray diffraction technique. The data were analyzed by two-dimensional correlation mapping (2D-CM), in particular: Generalized, hybrid and multiple perturbations correlation approaches. Two asynchronous correlation peaks at (19.

Formulation and in vitro evaluation of self-nanoemulsifying liquisolid tablets of furosemide.

Self-nanoemulsifying drug delivery systems (SNEDDS) were used to enhance the dissolution rate of furosemide as a model for class IV drugs and the system was solidified into liquisolid tablets. SNEDDS of furosemide contained 10% Castor oil, 60% Cremophor EL, and 30% PEG 400. The mean droplets size was 17.

Isolation, Structural characterization, and antiproliferative activity of phycocolloids from the red seaweed Laurencia papillosa on MCF-7 human breast cancer cells.

Hydrocolloids from seaweeds (phycocolloids) have interesting functional properties like antiproliferative activity. Marine algae consumptions are linked to law cancer incidences in countries that traditionally consume marine products. In this study, we have investigated water-soluble sulfated polysaccharides isolated from the red seaweed Laurencia papillosa and determined their chemical characteristics and biological activities on the human breast cancer cell line MCF-7.

Structure and vibrational properties of oxohalides of vanadium.

We study the structure and vibrational modes of a wide range of oxohalides of vanadium (VOX(n)Y(m); X, Y = F, Cl, Br, I; n, m = 0-3, n + m < or = 3). The results agree well with experimental results for VOCl(3) and VOF(3) and suggest reassignment of the experimentally observed VOF to VOF(2). We provide new assignments for various experimental modes, identifying several intermediates (VOBr(2), VOBr) and mixed structures (e.

Gas phase infrared spectrum and ab initio calculations of phosphorus(III) thiocyanide, SPCN.

An attempt has been made to record the gas phase infrared spectrum of phosphorus(III) thiocyanide, SPCN, for the first time. The molecule was generated by an on-line process using phosphorus(III) thiochloride, SPCl, as a precursor passed over heated silver cyanide at about 350 degrees C. The products were characterized by the infrared spectra of their vapors.

Gas-phase on-line generation and infrared spectroscopic investigations of polyphosphazenes, (NPX2)3 where X=F, Cl and Br.

Gas-phase infrared spectra of polyphosphazenes (phosphonitrilic halides trimer), (NPX2)3 where X=F, Cl and Br have been recorded. The molecules were generated for the first time by an on-line process using solid (NPCl2)3 as a precursor passed over heated sodium fluoride and potassium bromide at about 550 and 700 degrees C for (NPF2)3 and (NPBr2)3 production, respectively. The products were characterized by the infrared spectra of their vapors.

The gas-phase on-line production of phosphorus thiotrihalides, SPX3 and their identification by infrared spectroscopy.

A new route has been devised, leading to the production of phosphorus thiotrihalides, SPX3 where X = F, Br and I by an on-line process using phosphorus thiotrichloride, SPCl3 as starting compound gassed over the following heated salts NaF, KBr and KI at 530, 800 and 440 degrees C, respectively. The products have been characterized by their IR spectra, showing bands with PQR type structure, centered at 985, 762, 744 and 715 cm(-1). These bands are assigned to v1(a1), the S=P stretching fundamental modes of SPF3, SPCl3, SPBr3 and SPI3, respectively.

Gas-phase generation and infrared spectroscopy of metastable OP-SCN molecule.

An attempt has been made to generate the metastable phosphorus (III) oxythiocyanide molecule, OP-SCN for the first time by an on-line process using the vapor flow of phosphorus (III) oxychloride, OPCl passed over heated AgSCN at 520 degrees C. The products have been characterized by their IR spectra; values for v1 of 2055 cm(-1) (C[triple bond]N stretch), v2 of 1365 cm(-1) (O=P stretch), v3 of 720 cm(-1) (C-S stretch) and v7 of 680 cm(-1) (P-S stretch) have been obtained.