Bibliografie tematiche / Phosphine

Indice

  1. Articoli di riviste
  2. Tesi
  3. Libri
  4. Capitoli di libri
  5. Atti di convegni
  6. Rapporti di organizzazioni

Letteratura scientifica selezionata sul tema "Phosphine"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 7 luglio 2024

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Consulta la lista di attuali articoli, libri, tesi, atti di convegni e altre fonti scientifiche attinenti al tema "Phosphine".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Articoli di riviste sul tema "Phosphine"

1

Inoue, Hidenari, Hiromi Akahori, Yuri Ohno, Katsuo Nakazawa, Yoshimune Nonomura, Naoki Yoshioka, Gernot Heckmann e Ekkehard Fluck. "Axial Coordination of Phosphine or Phosphite to Iron(III) Chlorophyll a". Zeitschrift für Naturforschung B 50, n. 8 (1 agosto 1995): 1222–28. http://dx.doi.org/10.1515/znb-1995-0817.

Testo completo
Abstract (sommario):
The adduct formation of iron(III) chlorophyll a with phosphines or phosphites has been studied by spectroscopic methods. The red-shift in the Soret and Q bands caused by the axial coordination of phosphine or phosphite to iron(III) chlorophyll a is an evidence for the autoreduction of the central iron(III) ion. The 31P{1H} NMR spectrum of bis-adducts measured in the presence of excess phosphine or phosphite ligands gave a single peak in the down field range compared to that of the corresponding free ligand. The ESR and X-ray photoelectron spectra have revealed that the central iron atom of the bis-adduct of iron chlorophyll a with phosphines or phosphites is divalent and in the low-spin state. The axial coordination of phosphine or phosphite influences the electronic configuration of the central iron atom and the macrocyclic chlorine ligand to induce the autoreduction of the central iron(III) ion.
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Bains, William, Oliver Shorttle, Sukrit Ranjan, Paul B. Rimmer, Janusz J. Petkowski, Jane S. Greaves e Sara Seager. "Constraints on the Production of Phosphine by Venusian Volcanoes". Universe 8, n. 1 (17 gennaio 2022): 54. http://dx.doi.org/10.3390/universe8010054.

Testo completo
Abstract (sommario):
The initial reports of the presence of phosphine in the cloud decks of Venus have led to the suggestion that volcanism is the source of phosphine, through volcanic phosphides ejected into the clouds. Here, we examine the idea that mantle plume volcanism, bringing material from the deep mantle to the surface, could generate observed amounts of phosphine through the interaction of explosively erupted phosphide with sulfuric acid clouds. The direct eruption of deep mantle phosphide is unphysical, but a shallower material could contain traces of phosphide, and could be erupted to the surface. The explosive eruption that efficiently transports material to the clouds would require ocean:magma interactions or the subduction of a hydrated oceanic crust, neither of which occur on modern Venus. The transport of the erupted material to altitudes coinciding with the observations of phosphine is consequently very inefficient. Using the model proposed by Truong and Lunine as a base case, we estimate that an eruption volume of at least 21,600 km3/year would be required to explain the presence of 1 ppb phosphine in the clouds. This is greater than any historical terrestrial eruption rate, and would have several detectable consequences for remote and in situ observations to confirm. More realistic lithospheric mineralogy, volcano mechanics or atmospheric photochemistry require even more volcanism.
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Fox, Jonathan H., Brian F. Porter, Leslie Easterwood, Justin R. V. Hildenbrand, Pierre Hélie, James Smylie e Donal O’Toole. "Acute hepatic steatosis: a helpful diagnostic feature in metallic phosphide–poisoned horses". Journal of Veterinary Diagnostic Investigation 30, n. 2 (4 dicembre 2017): 280–85. http://dx.doi.org/10.1177/1040638717746707.

Testo completo
Abstract (sommario):
Metal phosphides, particularly zinc and aluminum phosphide, occasionally poison horses and other equids following their use as rodenticides and insecticides. Grain-based aluminum phosphide baits are used to control rodents such as prairie dogs. The clinical course in intoxicated horses is short (<24–48 h), and animals may be found dead. Hepatic lesions caused by phosphine poisoning are not well described. Laboratory confirmation depends on detecting phosphine gas in gastric contents. Eight horses and a mule were exposed to zinc phosphide used to control prairie dogs on a Wyoming ranch. Three of 9 exposed equids developed some combination of sweating, ataxia, anxiety, and colic; 2 died acutely, and 1 recovered. A diagnosis of zinc phosphide was made by detecting phosphine in stomach contents from a horse and a mule. The liver was pale and swollen in the affected horse, which died after a clinical course of ~12 h. Other changes were generalized congestion and edema, pulmonary edema, and acute cerebrocortical edema. There was diffuse hepatocellular microvesicular steatosis. Similar histologic lesions were present in 7 equine livers from 2 previously published episodes of metallic phosphide poisoning. Older lesions (>24 h of clinical signs) had centrilobular hepatic necrosis with congestion and a mixture of microvesicular and macrovesicular steatosis. Phosphine poisoning should be considered in horses that die acutely and are found to have steatosis, either with or without hepatocellular necrosis.
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Gusarova, Nina K., Svetlana N. Arbuzova e Boris A. Trofimov. "Novel general halogen-free methodology for the synthesis of organophosphorus compounds". Pure and Applied Chemistry 84, n. 3 (17 gennaio 2012): 439–59. http://dx.doi.org/10.1351/pac-con-11-07-11.

Testo completo
Abstract (sommario):
The use of novel general halogen-free methodology for the synthesis of phosphines, phosphine chalcogenides, and phosphinic acids from elemental phosphorus and alkenes and alkynes in the superbase suspensions is described.
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Sudakin, D. L. "Occupational exposure to aluminium phosphide and phosphine gas? A suspected case report and review of the literature". Human & Experimental Toxicology 24, n. 1 (gennaio 2005): 27–33. http://dx.doi.org/10.1191/0960327105ht496oa.

Testo completo
Abstract (sommario):
The manufacture and application of aluminium phosphide fumigants pose risks of inhalation exposure to phosphine gas. This article presents a case report of suspected inhalation exposure to phosphine gas in a manufacturing facility for aluminium phosphide fumigants, which was associated with acute dyspnoea, hypotension, bradycardia and other signs of intoxication. These symptoms resolved within several hours after removal from exposure. A review of the data on human exposures to phosphide fumigants identifies both pesticide applicators and individuals in the vicinity of application to be at risk of accidental exposure and injury from phosphine inhalation. More recent reports have identified risks of phosphine gas inhalation in association with the clandestine production of methamphetamine. Toxicodynamic effects of phosphine result from the inhibition of cytochrome c oxidase and subsequent generation of reactive oxygen species. There remain unanswered questions relating to the toxicokinetics of phosphine, as well as the assessment of human exposure utilizing biomarkers. As initial signs and symptoms of intoxication from phosphine gas may be nonspecific and transient, there is a need for improved recognition of the potential hazards associated with phosphide fumigants and phosphine gas.
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Trofimov, Boris, Nina Gusarova e Nataliya Chernysheva. "Catalyst- and Solvent-Free Addition of the P–H Species to Alkenes and Alkynes: A Green Methodology for C–P Bond Formation". Synthesis 49, n. 21 (28 agosto 2017): 4783–807. http://dx.doi.org/10.1055/s-0036-1588542.

Testo completo
Abstract (sommario):
Traditional methods for C–P bond formation via direct addition of P–H species to unsaturated compounds are usually implemented in the presence of base and metal catalysts or radical initiators in various organic solvents. During the last five years, a novel efficient and general catalyst/initiator- and solvent-free version of the hydrophosphination and hydrophosphinylation of multiple C–C bonds with H-phosphines and their chalcogenides has begun to develop and it is attracting growing attention. This approach corresponds to the recently emerged pot-, atom-, and step-economy (PASE) green paradigm. This review covers the literature on the synthesis of useful and in-demand organophosphorus compounds via catalyst- and solvent-free addition of P–H species to alkenes and alkynes.1 Introduction2 Addition of Secondary Phosphines to Alkenes3 Hydrophosphinylation of Alkenes with Secondary Phosphine Chalcogenides3.1 Oxidative Addition of Phosphine Oxides to Vinyl Sulfides3.2 Addition of Secondary Phosphine Sulfides and Phosphine Selenides to Alkenes3.3 Addition of Secondary Phosphine Sulfides and Phosphine Selenides to Divinyl Chalcogenides3.4 Hydrophosphinylation of Alkenes with Secondary Phosphine/Chalcogen Pair (Three-Component Reactions)4 Addition of Secondary Phosphines to Alkynes5 Addition of Secondary Phosphine Chalcogenides to Alkynes6 Conclusion
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Ghosh, Sujit, Kinkar Biswas e Basudeb Basu. "Recent Advances in Microwave Promoted C-P Cross-coupling Reactions". Current Microwave Chemistry 7, n. 2 (6 agosto 2020): 112–22. http://dx.doi.org/10.2174/2213335607666200401144724.

Testo completo
Abstract (sommario):
: Organophosphorous compounds are of potential importance in diverse fields. They are often used as intermediates for making functionalized phosphine ligands as well as find vast applications in the areas of industrial, agricultural and biological chemistry. The microwave-assisted synthesis of C-P bonds has become increasingly popular because of its various advantages over conventional heating in the perspectives of green chemistry. : This review article has primarily focused on the synthesis of various organophosphorous molecules via microwave promoted C-P cross-coupling reactions under metal-catalyzed or metal–free conditions over the last two decades. The synthesis of phosphine ligands on 4,4′-bisquinolone structural framework, disubstituted phosphinic acid esters, vinyl phosphines, aryl- and vinylphosphonates, sugar and nucleoside phosphonates, aminobisphosphonates, triphenyl phosphines, water-soluble tertiary phosphine oxides and many other potentially useful organophosphorous compounds have been illustrated critically. The Hirao reaction, Michaelis-Arbuzov reaction and Sandmeyer type of reactions are generally involved in creating C-P bonds. The role of various metal catalysts, solvents, bases, additives and temperature in different literatures are carefully discussed.
Gli stili APA, Harvard, Vancouver, ISO e altri
8

A Farrar, Ross, Angelo B Justus, Vikram A Masurkar e Peter M Garrett. "Unexpected survival after deliberate phosphine gas poisoning: An Australian experience of extracorporeal membrane oxygenation rescue in this setting". Anaesthesia and Intensive Care 50, n. 3 (6 dicembre 2021): 250–54. http://dx.doi.org/10.1177/0310057x211047603.

Testo completo
Abstract (sommario):
Phosphine poisoning is responsible for hundreds of thousands of deaths per year in countries where access to this pesticide is unrestricted. Metal phosphides release phosphine gas on contact with moisture, and ingestion of these tablets most often results in death despite intensive support. A 36-year-old woman presented to a regional hospital after ingesting multiple aluminium phosphide pesticide tablets and rapidly developed severe cardiogenic shock. In this case, serendipitous access to an untested Extracorporeal Membrane Oxygenation (ECMO) service of a regional hospital effected a successful rescue and prevented the predicted death. We discuss the toxicology, management and the evidence for and against using ECMO in this acute poisoning.
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Thomas, Ananya, Malavika Arun, Khalid Moinuddin e Paul Joseph. "Mechanistic Aspects of Condensed- and Gaseous-Phase Activities of Some Phosphorus-Containing Fire Retardants". Polymers 12, n. 8 (11 agosto 2020): 1801. http://dx.doi.org/10.3390/polym12081801.

Testo completo
Abstract (sommario):
As a part of our ongoing investigations on passively fire protecting polymeric materials, we have been employing both reactive and additive routes involving phosphorus-containing compounds. These included inorganic and organic substances, and in the latter case, the phosphorus-bearing groups differed in terms of the chemical environments (phosphite, phosphate, phosphine, phosphine oxide and phosphonate ester) and oxidation state of the P atom (i.e., III, or V). The overall flammability profiles of wood substrates coated with the phosphorus-containing compounds were obtained through cone calorimetric measurements. The elemental composition, morphology and chemical natures of the char residues, obtained from the cone tests, were analysed through a variety of spectroscopic, chromatographic and spectrometric means. From the complementary information, obtained through these analyses, some probable mechanistic pathways that underpin the condensed- and gaseous-phase activities of the different additives are suggested. It was found that the inorganic solid additive, i.e., (NH4)2HPO4, underwent a two-step degradation, yielding ammonia gas and phosphoric acid. Furthermore, the liquid additives, owing to their volatility as compared to the solid ones, showed a relatively higher presence in the vapour phase than volatile fragments emanating from the latter ones (i.e., from phosphine and the phosphine oxides).
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Guidone, Stefano, Fady Nahra, Alexandra M. Z. Slawin e Catherine S. J. Cazin. "Ruthenium indenylidene “1st generation” olefin metathesis catalysts containing triisopropyl phosphite". Beilstein Journal of Organic Chemistry 11 (1 settembre 2015): 1520–27. http://dx.doi.org/10.3762/bjoc.11.166.

Testo completo
Abstract (sommario):
The reaction of triisopropyl phosphite with phosphine-based indenylidene pre-catalysts affords “1st generation” cis-complexes. These have been used in olefin metathesis reactions. The cis-Ru species exhibit noticeable differences with the trans-Ru parent complexes in terms of structure, thermal stability and reactivity. Experimental data underline the importance of synergistic effects between phosphites and L-type ligands.
Gli stili APA, Harvard, Vancouver, ISO e altri
Più fonti

Tesi sul tema "Phosphine"

1

Phung, Quang Linh. "Synthèse de ligands chiraux de type phosphine-phosphite et phosphine-carbène N-hétérocyclique pour la catalyse asymétrique". Rouen, 2005. http://www.theses.fr/2005ROUES033.

Testo completo
Abstract (sommario):
La catalyse organométallique est une méthode de choix pour la synthèse de composés chiraux. Afin d'atteindre une selectivité et efficacité élevées en catalyse asymétrique, plusieurs paramètres réactionnels doivent être optimisés, parmi lesquels le choix et la structure du ligand sont sans doute les points les plus importants. Nous avons développé deux familles de ligands bidentates de type phosphine-phosphite et phosphine-carbène N-hétérocyclique. Ces deux séries de ligands possèdent une caractéristique structurale commune, à savoir un centre asymétrique adjacent à la phosphine. Cette proximité du centre stéréogène et de l'atome de phosphore pourrait avoir un effet positif sur l'énantiodiscrimination. Les ligands phosphine-phosphites ont été testés en hydrogénation (ee jusqu'à 84%) et hydroformylation (pas d'induction asymétrique) asymétriques catalysées par le rhodium. Les ligands phosphine-carbènes N-hétérocycliques ont été testés en hydrogénation et hydrosilylation asymétriques catalysées à l'iridium (pas d'induction asymétrique), et avec des résultats prometteurs dans le couplage de Suzuki-Miyaura
Catalytic asymmetric synthesis using organometallic reagents has become one of the most active areas of research in modern organic synthesis. To achieve the highest levels of reactivity and selectivity in catalytic enantioselective reactions, several reactions parameters must be optimized. Among them, the selection and design of the chiral ligand is perhaps the most crucial step. We have developed two families of bidentate ligands : phosphine-phosphite and phosphine N-heterocyclic carbene. These two series of ligands have a chiral center to the α-position next to the phosphine moiety. This stereogenic α-position could be of great importance since the phosphorus atom is directly associated with the transition metal in the asymmetric reaction. Phosphine-phosphite ligands were tested in the Rh-catayzed asymmetric hydrogenation (ee up to 84%) and hydroformylation (no asymmetric induction). Phosphine N-heterocyclic carbene ligands were tested in the Ir-catalyzed asymmetric hydrogenation and hydrosilylation (no asymmetric induction), and with promising results in the Suzuki-Miyaura cross-coupling reaction
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Deerenberg, Sirik. "Stereogenic phosphorus containing phosphine-phosphite ligands in asymmetric catalysis". [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2000. http://dare.uva.nl/document/57171.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Javierre, Guilhem. "Understand the inversion mechanism of P-stereogenic compound using kinetic studies and in silico modeling". Thesis, Ecole centrale de Marseille, 2018. http://www.theses.fr/2018ECDM0001/document.

Testo completo
Abstract (sommario):
La thèse consiste en l'étude de la racémisation d'hydrogéno-phénylphosphinates d'alkyle, des molécules centrées sur un phosphore stéréogénique. Pour cela, nous avons synthétisé les composés d'intérêt puis étudié leur cinétique de racémisation en utilisant l'HPLC chirale et la RMN du phosphore. La première étude théorique (SMD//M06-2X/6-31++G**) sur l’énantiomérisation d’un phosphinate d’alkyle après une SN2 par un alcool a montré comme mécanisme le plus favorable une syn-addition de l’alcool sur la double liaison P=O du phosphinate à l’opposé du groupement alkoxy. Les études cinétiques d’inversion du phosphinate d’éthyle dans l’éthanol à reflux ont montré une barrière de 135 kJ.mol-1 en moyenne, en excellent accord avec ce modèle (136 kJ.mol-1). L’ajout de base lors de l’étude cinétique ont montré une accélération de l’inversion avec une barrière maximum mesurée à 121,5 kJ.mol-1 montrant un effet de catalyse basique. Les modèles cinétiques et théoriques réalisés à ce jour ont suggéré que la base activerait l’alcool pour faciliter son addition. Les premiers résultats sur l’influence du groupement alkyle ont montré une dépendance globale de l’inversion à la taille du groupement, mais certains modèles DFT, notamment avec l’adamantyle, n’étaient pas en accord avec cette hypothèse
This thesis is about the racemization of alkyl hydrogeno-phenylphosphinate, a molecule centered on a stereogenic phosphorus atom. We have synthetized compounds of interest, and studied their kinetic of racemization with chiral HPLC and phosphorus NMR. The first theoretical study (SMD//M06-2X/6-31++G**) about the enantiomerization of alkyl phosphinate after an SN2 with an alcohol have shown that the most favored mechanism was a syn-addition of the alcohol onto the double bond P=O on the opposite side of the alkoxy group. Kinetic studies with ethyl phosphinate in ethanol under reflux have shown an inversion barrier around 135 kJ.mol-1, in excellent agreement with this model (136 kJ.mol-1). The addition of a basic compound during kinetic measurements has shown a decreasing of the barrier to 121.5 kJ.mol-1, showing a catalytic effect. Kinetic and theoretical models have suggested that the mechanism would go through an activation of the alcohol by the basic compound which would facilitate its addition. The first tests about the nature of the alkyl group of phosphinate and alcohol have shown a general dependency of the barrier with the hindrance, but some DFT models, especially with adamantyl, have been in disagreement with this hypothesis
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Gonschorowsky, Miriam. "Beiträge zur Chemie hydrophiler Phosphane". [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973540788.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Nickel, Thomas. "Neue Synthesen chiraler und polar funktionalisierter Phosphanliganden". [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=963282336.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Harrison, Mark Anthony. "EXPOSURE TO PHOSPHINE GAS DURING APPLICATION OF MAGNESIUM PHOSPHIDE IN STORED PRODUCT WAREHOUSES". VCU Scholars Compass, 1990. http://scholarscompass.vcu.edu/etd/4909.

Testo completo
Abstract (sommario):
The use of phosphine gas requires that respiratory protection be used if exposures exceed the OSHA permissible exposure limit. As with other chemical exposures limits many of the references used to establish occupational health guidelines date back to the 1930’s and 1940’s. This is quite common and is the case with phosphine gas. Initial planning for fumigations involving magnesium phosphide requires that a hazard assessment be performed. Expected worker exposures based on previous monitoring or test data was not readily available. Many current practices and procedures for fumigations are based on recommendations from applicators who used the product in the 1950’s and 60’s. Unfortunately, many of the recommendations were based on personal opinion and experience rather than actual exposure monitoring data. Not until the 1980's were comprehensive applicator exposure assessments being conducted for different tasks involving magnesium phosphide. As a result, it is necessary to generate current applicator exposure data and compare the data to current occupational exposure limits for phosphine gas.
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Roscoe, Jane Caroline. "Unsymmetrical tridentate phosphine ligands". Thesis, University of Central Lancashire, 1991. http://clok.uclan.ac.uk/20127/.

Testo completo
Abstract (sommario):
A general synthetic route, via phosphonium salts and phosphine oxides has been developed for the preparation of unsymmetrical triphosphine ligands, which necessarily contain one central chiral phosphorus atom. The ttparent" tridentate phosphine is (2- diphenylphosphinoethyl)(3-diphenylphosphinopropyl) phenylphosphine, Ph2P(CH2)3PPh(CH2)2PPh2, "eptp". Other tridentates were prepared by varying the substituents at one phosphorus atom to form the analogous ligands with a general formula of R2P(CH2)3PPh(CH2)2PPh2 where R=p-FC6H4, p-C1C6H4, o-CH30C6H4. The ligands were found to complex readily with nickel(Il) and palladium(ll) to form air-stable complexes containing square planar species such as [NiI(eptp)]+ in solution. Complexes were isolated using C104, PF6- and 1 as counterions, and were characterised by elemental analysis, magnetic and conductance measurements, infrared spectroscopy, and especially by 31 P nmr spectroscopy where the three non-equivalent phosphorus nuclei, all coupled to one another, provided a wealth of useful data. Crystals were grown for a single-crystal X-ray crystallographic study of the Ni12 complex of eptp, which showed one weakly bonded iodo ligand at the apex of a square pyramid. This is the site at which a substrate molecule would be expected to coordinate in any asymmetric homogeneous catalytic application; the other side of the square plane was sterically crowded. The unit cell contained four molecules, two of each enantiomer. The nickel(II)-triphosphine complexes were screened for catalytic activity in the hydrogenation of alkenes. In this investigation they were all found to be inactive for hydrogenation at ambient conditions. However addition of a little NaBH4 produced colourless solutions, presumably nickel(0) complexes, which in air were found to be excellent oxidation catalysts, rapidly oxidising added phosphines to phosphine oxides. The phosphine oxide intermediate in the tridentate phosphine ligand synthesis, Ph2P(0)(CH2)3P(0)Ph(CH2)2PPh2, teptp02, provided an attractive stage at which to investigate resolution of the two enantiomers, since the final trichlorosilane reduction stage of the phosphine oxides to phosphines is known to be stereospecific. 31P nmr studies showed strong chiral recognition between eptp02 and (+)-camphorsulphonic acid in CDCI3. The novel mixed phosphine/phosphine oxide ligand eptp02 was found to coordinate exclusively via phosphorus to palladium(Il) in [PdC12(eptpO2)21 or via the phosphine oxide groups to lanthanum(lII). It would also coordinate simultaneously to both, and so is ideally suited to the preparation of very unusual heterobinuclear complexes containing one oxophilic f-block metal ion (e.g. La 3 ) and one 'soft' d-block metal ion (e.g. Pd2+). Such complexes presumably contain macrocyclic rings involving both types of metal ion. Various other routes to unsymmetrical tridentate ligands were investigated which involved some unusual mixed bidentate ligands. A new route to bisphosphine monoxides, Ph2P(CH2)P(0)Ph2, has been developed in this programme. These monoxides provided a simple route to new tn- and tetra- phosphine oxides such as eptp03 and the "2,3,2"-tetraoxide , Ph2P(0)(CH2)2P(0)Ph(CH2)3P(0)Ph(CH2)2P(0)Ph2. In collaboration with The University of Barcelona, (Campus of Tarragona), the bisphosphine monoxides with -(CH2)2- and -(CH2)4- backbones were converted to ligands containing both a phosphine sulphide and a phosphine oxide group e.g. Ph2P(S)(CH2)2P(0)Ph2. This ligand and the bisphosphine monoxide, were found to coordinate to tin(II) chloride through the phosphine oxide only. Whereas various alkyl and aryl substituents at phosphorus have been extensively investigated in polyphosphine ligands by previous workers, the pyridyl substituent has not been used in this way. This would be an interesting substituent as it is sterically similar to phenyl but electronically quite different. New routes to a pyridyl substituent at phosphorus were investigated, producing the previously unknown pyridyltriphenyiphosphonium salt [PPh3(2-py)]Br and the ligand 6-bromo-2(diphenylphosphino)pyridine. When hydrolysed phosphonium salts containing a pyridyl group were found to lose the pyridyl group in preference to phenyl, so elaboration to di- and tri-phosphines was not possible.
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Plancq, Sabine. "Heteronuclear carbonyl phosphine complexes". Thesis, Heriot-Watt University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335276.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Hutton, Gordon Eric. "Stereocontrol with phosphine oxides". Thesis, University of Cambridge, 1994. https://www.repository.cam.ac.uk/handle/1810/273009.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Passays, Johan. "Nouveaux ligands mixtes de type phosphore / carbène N-hétérocyclique : synthèse et applications en catalyse asymétrique". Thesis, Rouen, INSA, 2011. http://www.theses.fr/2011ISAM0008.

Testo completo
Abstract (sommario):
Une méthode simple et efficace a été développée pour la préparation de ligands bifonctionnels associant les motifs phosphine ou phosphite d'une part, et carbène Nhétérocyclique(NHC) ou imidazolium d'autre part. Dans un premier temps, une série de ligands diphénylphosphine-carbène chiraux portant un centre stéréogène en a de la phosphinea été développée à partir b-hydroxyesters. Une famille de ligands a ainsi été développée afin d'évaluer l'influence de l'encombrement stérique de différents groupements alkyles en a de la phosphine et de la nature des groupements aromatiques portés sur l'imidazole sur leur activité catalytique. L’étude s’est ensuite étendue à la synthèse de ligands de type dialkylphosphine carbène et phosphite-carbène. Ces différents ligands ont été complexés avec des métaux tels que l’iridium ou le rhodium de manière à en étudier l’activité en hydrogénation asymétrique
A straightforward method for the preparation of new bidentate ligands containing aphosphine or a phosphite and a carbene function was developed. Different phosphorus-imidazolium compounds were prepared according to this method. First, diphenylphosphine-NHC ligands featuring a stereogenic center a to the phosphine were synthesized from b-hydroxyesters. This strategy was then extended to the preparation of phosphite-imidazoliumand dialkylphosphine-imidazolium compounds. Complexation of these phosphorus-NHCligands with different metals like Ir or Rh was performed in order to study there catalytic properties in asymmetric hydrogenation
Gli stili APA, Harvard, Vancouver, ISO e altri
Più fonti

Libri sul tema "Phosphine"

1

1951-, Fagerstone Kathleen A., e United States. Animal and Plant Health Inspection Service., a cura di. Primary and secondary hazards of zinc phosphide to nontarget wildlife a review of the literature. [Washington, D.C.?]: U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service, 1994.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

executive, Health and safety. Fumigation using phosphine. London: H.M.S.O., 1986.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

International Program on Chemical Safety. Phosphine and selected metal phosphides health and safety guide. Geneva: WHO, 1989.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

International Program on Chemical Safety., International Labour Organisation e United Nations Environment Programme, a cura di. Phosphine and selected metal phosphides health and safety guide. Geneva: World Health Organization, 1989.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

International Program on Chemical Safety. Phosphine and selected metal phosphides health and safety guide. Geneva: WHO, 1989.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

N, Nikonov G., e Arbuzov Boris Aleksandrovich 1903-, a cura di. Funkt͡s︡ionalʹnozameshchennye fosfiny i ikh proizvodnye. Moskva: "Nauka", 1986.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Taylor, R. W. D. Using phosphine as an effective commodity fumigant. Chatham: Natural Resources Institute, 1996.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Graver, Jan Van Someren. Guide to fumigation under gas-proof sheets. [Rome]: Food and Agriculture Organization of the United Nations, 2004.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Hawkins, Ian Michael. New transition metal complexes containing phosphine and sulphur ligands. Norwich: University of East Anglia, 1988.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

El-Gamati, Ibrahim Mohamed T. Studies of mono- and polynuclear metal carbonyl phosphine complexes. Dublin: University College Dublin, 1997.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Più fonti

Capitoli di libri sul tema "Phosphine"

1

Bhalla, Ashish. "Phosphate and Phosphine". In Critical Care Toxicology, 1875–85. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-17900-1_84.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Hallenbeck, William H., e Kathleen M. Cunningham-Burns. "Phosphine and Phosphides". In Pesticides and Human Health, 112. New York, NY: Springer New York, 1985. http://dx.doi.org/10.1007/978-1-4612-5054-8_73.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Bhalla, Ashish. "Phosphine and Metal Phosphide". In Critical Care Toxicology, 1–11. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-20790-2_84-1.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Pasek, Matthew A. "Phosphine". In Encyclopedia of Astrobiology, 1229. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_1186.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Perkins, Michael W., Benjamin Wong, Dorian Olivera e Alfred Sciuto. "Phosphine". In Hamilton & Hardy's Industrial Toxicology, 1295–300. Hoboken, New Jersey: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781118834015.ch118.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Pasek, Matthew A. "Phosphine". In Encyclopedia of Astrobiology, 1858–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_1186.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Breuer, D. "Phosphine". In Analyses of Hazardous Substances in Air, 147–57. Weinheim, FRG: Wiley-VCH Verlag GmbH, 2003. http://dx.doi.org/10.1002/3527600191.ch13.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Marriott, Robert C., Jerome D. Odom, Curtis T. Sears, V. D. Bianco e S. Doronzo. "Phosphine". In Inorganic Syntheses, 1–4. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470132456.ch1.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Gokhale, Sudarshan D., William L. Jolly, Sherman Thomas e Doyle Britton. "Phosphine". In Inorganic Syntheses, 56–58. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470132401.ch17.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Pasek, Matthew A. "Phosphine". In Encyclopedia of Astrobiology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_1186-4.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri

Atti di convegni sul tema "Phosphine"

1

Guo, Huang, Gulfam Iqbal e Bruce S. Kang. "PH3 Effects on the Electrochemical Degradation of SOFC Anode". In ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/fuelcell2011-54913.

Testo completo
Abstract (sommario):
Solid Oxide Fuel Cell anode is readily degraded by trace amount of Phosphine (PH3) contaminant that is found in coal-derived syngas. PH3 interacts with the anode material and affects its electrochemical performance by forming secondary phases. In this paper, the influence of the ppm level of PH3 with moisture is investigated on the formation of secondary phases and hence on anode electrochemical performance degradation. Nickel yttria-stabilized zirconia (Ni-YSZ) anode shows immediate and severe electrochemical degradation due to PH3 in moist hydrogen condition attributed to the nickel-phosphate secondary phase formation. Whereas in dry hydrogen condition, nickel-phosphide is preferred to form on the anode surface that shows less deleterious effects on SOFC performance as compared to nickel-phosphate.
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Wawer, Andrzej, Iwona Wawer, Teobald Kupka, Piotr Lodowski e Maria Jaworska. "NMR and theoretical studies on selected phosphines and phosphine oxides". In The first European conference on computational chemistry (E.C.C.C.1). AIP, 1995. http://dx.doi.org/10.1063/1.47684.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Doménech, José, e Belén Timón, Maté. "IR SPECTRA OF PHOSPHINE ICES." In 2023 International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2023. http://dx.doi.org/10.15278/isms.2023.7025.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Geng, Jinju, Rui Zhang e Xiaorong Wang. "Chemical Origin of Phosphine in Nature". In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5516429.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Okuda, Shoko, e Hiroyuki Sasada. "SEARCH FOR INVERSION SPLITTING OF PHOSPHINE". In 73rd International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2018. http://dx.doi.org/10.15278/isms.2018.wg09.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Ren, Bingnan, Ping Ning e Jing Geng. "Modification of Activated Carbon for Phosphine Adsorption". In 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5163081.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

He, S., H. Zhang, C. Liu, C. Yang e H. Zeng. "Phosphine-free synthesis of iron selenide nanocrytals". In 2015 IEEE International Magnetics Conference (INTERMAG). IEEE, 2015. http://dx.doi.org/10.1109/intmag.2015.7157346.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Akhlestin, A. Y., S. S. Voronina, A. I. Privezentsev e A. Z. Fazliev. "Systematization of published data on phosphine isotopologues". In Eighteenth International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, a cura di Oleg A. Romanovskii. SPIE, 2012. http://dx.doi.org/10.1117/12.2012471.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Fernández-Fariña, Sandra, Isabel Velo-Heleno, Lara Rouco, Miguel Martínez-Calvo e Ana M. González-Noya. "Oxidation Processes in a Phosphine-Thiocarbohydrazone Ligand". In International Electronic Conference on Synthetic Organic Chemistry. Basel Switzerland: MDPI, 2022. http://dx.doi.org/10.3390/ecsoc-26-13559.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Valentine, Donald. "Replacements for arsine and phosphine in MOCVD processing". In AIP Conference Proceedings Volume 166. AIP, 1988. http://dx.doi.org/10.1063/1.37129.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri

Rapporti di organizzazioni sul tema "Phosphine"

1

Zhang, X., A. Linsebigler, U. Heiz, J. T. Yates e Jr. Phosphine Chemistry on Mo(110) and Oxidized Mo(110). Fort Belvoir, VA: Defense Technical Information Center, gennaio 1993. http://dx.doi.org/10.21236/ada266717.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Fthenakis, V., e P. Moskowitz. Manufacture of thin-film photovoltaic cells: characterization and management of phosphine hazards. Office of Scientific and Technical Information (OSTI), febbraio 1986. http://dx.doi.org/10.2172/6889512.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Quin, Louis D. Generation of Phosphorous Ester, Phosphorus Amide, and Phosphine Derivatives of Low Coordination Number. Fort Belvoir, VA: Defense Technical Information Center, ottobre 1986. http://dx.doi.org/10.21236/ada175747.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Quin, Louis D. Generation of Phosphorus Ester, Phosphorus Amide, and Phosphine Derivatives of Low Coordination Number. Fort Belvoir, VA: Defense Technical Information Center, dicembre 1989. http://dx.doi.org/10.21236/ada216977.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Kristovich, Robert L., Kathy L. Crouse, David A. McCaskey e Charles L. Crouse. Characterization of Phosphine Production During Extended Storage of the KM03 Red Phosphorus Floating Smoke Pot. Fort Belvoir, VA: Defense Technical Information Center, agosto 2011. http://dx.doi.org/10.21236/ada550486.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Raghothama, Kashchandra G., Avner Silber e Avraham Levy. Biotechnology approaches to enhance phosphorus acquisition of tomato plants. United States Department of Agriculture, gennaio 2006. http://dx.doi.org/10.32747/2006.7586546.bard.

Testo completo
Abstract (sommario):
Abstract: Phosphorus is one of the least available macronutrient in the soil. The high affinity phosphate transporters are known to be associated with phosphate acquisition under natural conditions. Due to unique interactions of phosphate with soil particles, up to 80% of the applied phosphates may be fixed forcing the farmers to apply 4 to 5 times the fertilizers necessary for crop production. Efficient uptake and utilization of this essential nutrient is essential for sustainability and profitability of agriculture. Many predictions point to utilization/exhaustion of high quality phosphate rocks within this century. This calls for efforts to improve the ability of plants to acquire and utilize limiting sources of phosphate in the rhizosphere. Two important molecular and biochemical components associated with phosphate efficiency are phosphate transporters and phosphatases. This research project is aimed at defining molecular determinants of phosphate acquisition and utilization in addition to generating phosphate uptake efficient plants. The main objectives of the project were; Creation and analysis of transgenic tomato plants over-expressing phosphatases and transporters Characterization of the recently identified members (LePT3 and LePT4) of the Pi transporter family Generate molecular tools to study genetic responses of plants to Pi deficiency During the project period we have successfully identified and characterized a novel phosphate transporter associated with mycorrhizal symbiosis. The expression of this transporter increases with mycorrhizal symbiosis. A thorough characterization of mutant tomato lacking the expression of this gene revealed the biological significance of LePT3 and another novel gene LePT4. In addition we have isolated and characterized several phosphate starvation induced genes from tomato using a combination of differential and subtractive mRNA hybridization techniques. One of the genes, LePS2 belongs to the family of phospho-protein phosphatase. The functionality of the recombinant protein was determined using synthetic phosphor-peptides. Over expression of this gene in tomato resulted in significant changes in growth, delay in flowering and senescence. It is anticipated that phospho-protein phosphatase may have regulatory role in phosphate deficiency responses of plants. In addition a novel phosphate starvation induced glycerol 3-phosphate permease gene family was also characterized. Two doctoral research students are continuing the characterization and functional analysis of these genes. Over expression of high affinity phosphate transporters in tobacco showed increased phosphate content under hydroponic conditions. There is growing evidence suggesting that high affinity phosphate transporters are crucial for phosphate acquisition even under phosphate sufficiency conditions. This project has helped train several postdoctoral fellows and graduate students. Further analysis of transgenic plants expressing phosphatases and transporters will not only reveal the biological function of the targeted genes but also result in phosphate uptake and utilization efficient plants.
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Collings, R. K. Phosphate. Natural Resources Canada/CMSS/Information Management, 1991. http://dx.doi.org/10.4095/328633.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Chandler, F. W., e R. L. Christie. Stratiform phosphate. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1995. http://dx.doi.org/10.4095/207952.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Hay, M., e W. King. PHOSPHATE MANAGEMENT: FY2010 RESULTS OF PHOSPHATE PRECIPITATION TESTS. Office of Scientific and Technical Information (OSTI), aprile 2011. http://dx.doi.org/10.2172/1013047.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Grasby, S. E., e J. M. Galloway. Rare-earth elements of Permian through Cretaceous strata of the Sverdrup Basin, Nunavut and Northwest Territories. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330202.

Testo completo
Abstract (sommario):
This report provides new rare earth element (REE) data from Permian through to Late Cretaceous sedimentary rocks of the Sverdrup Basin, along with focused analyses on phosphate nodules that occur in the Middle Triassic Murray Harbour Formation. Results show the overall sedimentary values are low, however phosphate nodules are highly enriched in REEs.
Gli stili APA, Harvard, Vancouver, ISO e altri
Ti possono interessare anche gli elenchi estesi di opere sul tema "Phosphine":
Articoli di riviste Tesi Libri
Offriamo sconti su tutti i piani premium per gli autori le cui opere sono incluse in raccolte letterarie tematiche. Contattaci per ottenere un codice promozionale unico!

Vai alla bibliografia