Amorphous carbon film deposition on inner surface of tubes using atmospheric pressure pulsed filamentary plasma source

Uniform amorphous carbon film is deposited on the inner surface of quartz tube having the inner diameter of 6 mm and the outer diameter of 8 mm. A pulsed filamentary plasma source is used for the deposition. Long plasma filaments (~ 140 mm) as a positive discharge are generated inside the tube in argon with methane admixture. FTIR-ATR, XRD, SEM, LSM and XPS analyses give the conclusion that deposited film is amorphous composed of non-hydrogenated sp2 carbon and hydrogenated sp3 carbon. Plasma is characterized using optical emission spectroscopy, voltage-current measurement, microphotography and numerical simulation. On the basis of observed plasma parameters, the kinetics of the film deposition process is discussed

First organotin complex of a phosphonic diamide RP(O)(NHR)<SUB>2</SUB>

Diorganotin dichloride-phosphonic diamide complex, [Ph<SUB>2</SUB>SnCl<SUB>2</SUB>(tBuP(O)(NH<SUP>i</SUP>Pr)<SUB>2</SUB>)<SUB>2</SUB>] (1), is prepared by the addition of two equivalents of<SUP> t</SUP>BuP(O)(NH<SUP>i</SUP>Pr)<SUB>2</SUB> to one equivalents of Ph<SUB>2</SUB>SnCl<SUB>2</SUB> either in the presence or absence of triethylamine. Compound 1 is a rare example of an all-trans SnA<SUB>2</SUB>B<SUB>2</SUB>C<SUB>2</SUB> complex that contains H-bonded six-membered rings which are made up of six different main group elements

Metal Complexes of Organophosphate Esters and Open-Framework Metal Phosphates: Synthesis, Structure, Transformations, and Applications

The chemistry of organophosphate ester complexes has been reviewed. Also included are the complexes that have been sufficiently well characterized through a single x-ray diffraction study, structural characterization of phosphate ester metal complex, and phosphate-based materials. Metal-containing aluminophosphate molecular sieves offer tremendous potential as heterogeneous catalysts for liquid-phase oxidation reactions in the production of fine chemicals. The recent success in the preparation of AlPO-based catalyst for the oxidation of n-alkanes at the terminal C atoms with high selectivity using molecular oxygen in liquid-phase reaction has been considered a breakthrough. Also notable is the observation of interesting magnetic properties. This transition metal containing open-framework solids show different types of magnetic ordering thus, classified as anti-ferromagnetic materials. These metal ions also exhibit interesting magnetic exchange between the metal phosphate layers via the organic linkers

Structural Diversity in Zinc Phosphates and Phosphinates: Observation of a Lattice Water Dimer Sandwiched Between Phosphoryl Oxygen Atoms

Reactions of zinc acetate dihydrate with organic phosphates $[(RO)_2P(O)(OH)]$ (R = tBu, Ph) and phosphinic acids [PhR'P(O)(OH)] (R' = Ph, H) have been investigated in the presence of 1,10-phenanthroline (phen). While the use of ditert-butyl phosphate (dtbp-H) results in the formation of $[Zn(phen)_2(dtbp)(OH_2)][dtbp](MeOH)(MeCOOH)(H_2O)_3$ (1), the change of phosphorus source to diphenylphosphate (dpp-H) yields an interesting phosphate-bridged dinuclear complex $[{Zn(phen)(dpp)}_2{\mu_2-dpp}_2]$ (2). Mononuclear complexes $[Zn(phen)_2(dppi)_2](H_2O)_2$ (3) and $[Zn(phen)_2(ppi)_2]-(H_2O)$ (4) have been obtained from similar reactions by the use of diphenylphosphinic acid (dppi-H) and phenylphosphinic acid (ppi-H), respectively. The high steric bulk of the dtbp ligand results in the formation of the cationic complex 1, where only one of the dtbp ligands is directly coordinated to the metal atom, leaving the second dtbp molecule as the counter anion. The inorganic core of dinuclear zinc phosphate 2 resembles the single four-ring (S4R) secondary building unit of framework zinc phosphates. Compounds 3 and 4 are neutral monomeric hexacoordinate complexes with two chelating 1,10-phen ligands and two monodentate phosphinate ligands. The two lattice water molecules in 3 form an interesting water dimer $(H_2O)_2$. These water dimers link the mononuclear zinc complexes in the lattice to form an Hbonded one-dimensional polymer. Similarly, the lattice water present in 4 serves to link the zinc phenylphosphinate molecules through hydrogen bonding in the form of a 1-D polymer. The reaction of the precursor complex $[Zn(bpy)_2(OAc)]-(ClO_4).H_2O$ with dpp-H, dppi-H, and ppi-H in methanol leads to the formation of zinc phosphate $[Zn(bpy)_2(dpp)]_2-(ClO_4)_2.H_2O$ (5) and phosphinates $[Zn(bpy)_2(dppi)]_2(ClO_4)_2$ (6) and $[Zn(bpy)_2(ppi)]_2(ClO_4)_2$ (7), respectively. The molecular structures of 1–5 and 7 have been determined by singlecrystal X-ray diffraction studies