title: [Dicyclohexyl(sulfanylidene)-λ⁵-phosphanyl]methanol

authors: Henderson, William

subjects: phosphane sulfide

abstract: The title compound, [dicyclohexyl(sulfanylidene)-λ⁵-phosphanyl]methanol, Cy₂P(=S)CH₂OH (1), was obtained from the reaction between [Cy₂P(CH₂OH)₂]Cl with one molar equivalent of NaOH and an excess of elemental sulfur (powdered). Characterization was by a single-crystal X-ray structure determination as well as IR, and ¹D-NMR (¹H, ¹³C{1H}, ³¹P{1H}), and 2D-NMR (DEPT-135 and HSQC) spectroscopy, ESI mass spectrometry, and elemental analysis. X-ray crystallography on Compound 1 shows the phosphorus atom to be tetrahedrally coordinated within a non-symmetric C₃S donor set but with relatively minor distortions from the ideal geometry. In the molecular packing, hydroxyl-O–H⋯S(thione) hydrogen bonds led to supramolecular helical chains along the b-axis direction.

text: [Dicyclohexyl(sulfanylidene)-λ⁵-phosphanyl]methanol The title compound, [dicyclohexyl(sulfanylidene)-λ⁵-phosphanyl]methanol, Cy₂P(=S)CH₂OH (1), was obtained from the reaction between [Cy₂P(CH₂OH)₂]Cl with one molar equivalent of NaOH and an excess of elemental sulfur (powdered). Characterization was by a single-crystal X-ray structure determination as well as IR, and ¹D-NMR (¹H, ¹³C{1H}, ³¹P{1H}), and 2D-NMR (DEPT-135 and HSQC) spectroscopy, ESI mass spectrometry, and elemental analysis. X-ray crystallography on Compound 1 shows the phosphorus atom to be tetrahedrally coordinated within a non-symmetric C₃S donor set but with relatively minor distortions from the ideal geometry. In the molecular packing, hydroxyl-O–H⋯S(thione) hydrogen bonds led to supramolecular helical chains along the b-axis direction.

year: 2019

title: Synthesis of tungsten oxide tapered needles with nanotips

authors: Wang, Shiliang

subjects: Crystal morphology

abstract: Tungsten oxide tapered needles with nanotips were synthesized on a large scale by reacting tungsten nanopowders with hydrous nickel nitrate in hydrogen atmosphere. The resultant tungsten oxide needles have lengths more than 100 μm, root diameters of several hundred nanometers and tip diameters of several nanometers, showing a perfectly axisymmetric configuration. HRTEM and SAED analyses showed that the synthesized tungsten oxide tapered needles have a single-crystalline structure with growth direction of [0 1 0]. The effects of the experimental conditions (the ratio between tungsten and hydrous nickel nitrate, the size of tungsten powders, and the reaction atmosphere) on the morphology of the products were systematically investigated. It was found that tungsten oxide nanowires, submicro-/micro-whiskers and microtubules could be facilely obtained under different experimental conditions. The unique configuration and the single-crystal structure of the tapered needles may make them a potential candidate for field emitters and probing tips.

text: Synthesis of tungsten oxide tapered needles with nanotips Tungsten oxide tapered needles with nanotips were synthesized on a large scale by reacting tungsten nanopowders with hydrous nickel nitrate in hydrogen atmosphere. The resultant tungsten oxide needles have lengths more than 100 μm, root diameters of several hundred nanometers and tip diameters of several nanometers, showing a perfectly axisymmetric configuration. HRTEM and SAED analyses showed that the synthesized tungsten oxide tapered needles have a single-crystalline structure with growth direction of [0 1 0]. The effects of the experimental conditions (the ratio between tungsten and hydrous nickel nitrate, the size of tungsten powders, and the reaction atmosphere) on the morphology of the products were systematically investigated. It was found that tungsten oxide nanowires, submicro-/micro-whiskers and microtubules could be facilely obtained under different experimental conditions. The unique configuration and the single-crystal structure of the tapered needles may make them a potential candidate for field emitters and probing tips.

year: 2007-05

title: Worlded object and its presentation: A Māori philosophy of language

authors: Mika, Carl Te Hira

abstract: In an era concerned with the survival of Indigenous languages, language as a general phenomenon needs to be thought of as thoroughly connected to one’s worldview. In this article, I propose a different conception of language that sides more with what I call ‘the worlding of things’ than linguistics. To foreshadow my speculations on language, I consider the possibility that, within the representation of one entity in perception, there exist all other entities. An entity is hence ‘worlded’—a key aspect of the term ‘whakapapa’. I then turn to think about language as a general phenomenon for Mäori, and its complex ability to world an entity even as it adumbrates that thing’s backdrop. I consider the verb ‘to be’ in that light, arguing that Mäori identify language as a sort of gathering of entities rather than an instrument for singling out one thing as thoroughly and separably evident. This article is therefore as much about the full participation of the world as it is about language; it also aims to counter the belief that language is merely a conveyor of ideas.

text: Worlded object and its presentation: A Māori philosophy of language In an era concerned with the survival of Indigenous languages, language as a general phenomenon needs to be thought of as thoroughly connected to one’s worldview. In this article, I propose a different conception of language that sides more with what I call ‘the worlding of things’ than linguistics. To foreshadow my speculations on language, I consider the possibility that, within the representation of one entity in perception, there exist all other entities. An entity is hence ‘worlded’—a key aspect of the term ‘whakapapa’. I then turn to think about language as a general phenomenon for Mäori, and its complex ability to world an entity even as it adumbrates that thing’s backdrop. I consider the verb ‘to be’ in that light, arguing that Mäori identify language as a sort of gathering of entities rather than an instrument for singling out one thing as thoroughly and separably evident. This article is therefore as much about the full participation of the world as it is about language; it also aims to counter the belief that language is merely a conveyor of ideas.

year: 2016