Thin films of VO2VO_2 on glass by atomic layer deposition: microstructure and electrical properties

Thin films of semiconducting, monoclinic, $VO_2$(M) have been deposited on glass by atomic layer deposition (ALD). The composition and microstructure of the films have been examined by X-ray diffraction and scanning electron microscopy (SEM). The films deposited are $VO_2$(M) phase, as deposited, and have been obtained at temperatures as low as 400 1C. The films comprise largely of platelet morphology as illustrated by SEM. The semiconductor-metal transition near 340K leads to a large jump in resistivity in all the $VO_2$(M) films, on glass, as deposited. The formation of $VO_2$(M) phase has been shown to occur under very specific ALD conditions (ALD window). Growth kinetics, microstructure, and electrical properties have been studied as a function of deposition temperature

Hexaaquamanganese(II) dinitrate bis-(hexamethylenetetramine) tetrahydrate

In the title compound, $[Mn(H-2O)_6](NO_3)_2.2C_6H_{12}N_4.4H_2O,$ the hexamethyleneteramine molecules have no direct coordination to the $Mn^{II}$ atom. $O-H\cdot\cdot\cdot{O}$ and $O-H\cdot\cdot\cdot{N}$ intermolecular hydrogen bonds form a three-dimensional network

Hexaaquanickel(II) dichromate bis(hexa-methylenetetramine) monohydrate

A novel compound consisting of a hydrated metal cation, an organic molecule, an inorganic complex anion and water of crystallization has been synthesized and is found to crystallize in the monoclinic space group $P2_1/c$. The structure of the title compound, $[Ni(H_2O)_6][Cr_2O_7]\cdot 2 C_6H_{12}N4 \cdot H_2O$, contains octahedrally coordinated nickel ions and discrete dichromate anions. The hexamethylenetetramine molecules have no direct coordination to the metal ions. There are two cations, two anions, four tetramine molecules and two uncoordinated water molecules in the asymmetric unit. The structure is stabilized by extensive intra- and intermolecular hydrogen bonding

Synthesis, characterization and structure of [Ni(H2O)6]2(Cr2O7)2(hmta)4⋅2H2O[Ni(H_2O)_6]_2(Cr_2O_7)_2(hmta)_4·2H_2O (hmta=hexamethylenetetramine): a novel metal organic–inorganic hybrid

A metal organic–inorganic hybrid compound $[Ni(H_2O)_6]_2(Cr_2O_7)_2(hmta)_4 2H_2O$ was prepared and characterized by single-crystal X-ray diffraction. The compound crystallizes in the monoclinic space group $P2_1/c$ with a = 7.976(5)A, b= 13.333(3)A, c= 14.070(3)A,\beta = 97.891(3); Z= 4 and R= 0.048. The structure consists of octahedrally coordinated nickel ions with water and discrete units of dichromate ions in which chromium is tetrahedrally coordinated. This inorganic moiety is well separated in the crystal structure from the organic moiety built by ‘‘hmta’’ ligands, resulting in the formation of a novel organic–inorganic framework

Synthesis and crystal structure of M(hmt)<SUB>2</SUB>(H<SUB>2</SUB>O)<SUB>6</SUB>(NO<SUB>3</SUB>)<SUB>2</SUB>.4H<SUB>2</SUB>O complexes, where M=Mn<SUP>2+</SUP>, Co<SUP>2+</SUP>

A series of M-hmt complexes, where M=Mn2+, Co2+ were synthesized and studied by single crystal X-ray diffraction. The cobalt complex crystallizes in the triclinic space group P-1 with a = 9.9098(2) &#197;, b = 9.390(2)&#197;, c = 9.649(2)&#197;, &#945;=88.3(1)&#176;, &#946;=75.6(2)&#176;, &#947;=61.64(3)&#176; with Z=1. The Mn complex crystallized in the monoclinic space group P21/n with , a = 9.511(3)&#197;, b = 16.232(4)&#197;, c= 19.426(5)&#197;, &#946;=90.6(4)&#176; with Z=4. The structure consists of hexa-coordinated metal cations with water as the ligand having slightly distorted octahedral geometry. The organic ligand, hexamethylenetetramine is not directly coordinated to the metal ion but its presence stabilizes the molecular assembly because of the presence of a rich variety of intermolecular interactions

Synthesis, characterization and structure of [Ni(H<SUB>2</SUB>O)<SUB>6</SUB>]<SUB>2</SUB>(Cr<SUB>2</SUB>O<SUB>7</SUB>)<SUB>2</SUB>(hmta)<SUB>4</SUB>&#183;2H<SUB>2</SUB>O (hmta=hexamethylenetetramine): a novel metal organic-inorganic hybrid

A metal organic-inorganic hybrid compound [Ni(H2O)6]2(Cr2O7)2(hmta)4&#183;2H2O was prepared and characterized by single-crystal X-ray diffraction. The compound crystallizes in the monoclinic space group P21/c with a = 7.976(5)&#197;, b = 13.333(3)&#197;, c = 14.070(3)&#197;, &#946;=97.89&#176;(3), Z=4 and R=0.048. The structure consists of octahedrally coordinated nickel ions with water and discrete units of dichromate ions in which chromium is tetrahedrally coordinated. This inorganic moiety is well separated in the crystal structure from the organic moiety built by "hmta" ligands, resulting in the formation of a novel organic-inorganic framework