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AbstractAbstract
[en] A one-pot procedure has been developed for the synthesis of 3-aroyl-2-(polyfluoroalkyl)quinoxalines and 3-aroyl-2-(polyfluoroalkyl)benzo[g]quinoxalines by nitrosation of lithium 3-(polyfluoroalkyl)-1,3-diketonates and subsequent reaction with benzene-1,2-diamine or naphthalene-2,3-diamine, respectively.
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Source
Copyright (c) 2019 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Russian Journal of Organic Chemistry; ISSN 1070-4280;
; v. 55(6); p. 890-893

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AbstractAbstract
No abstract available
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Source
(c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
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AbstractAbstract
[en] Extraction behavior of lanthanides into benzene with 1,1,1-trifluoro-4-mercapto-4-(2-thienyl)-3-butene-2-one (monothiothenoyltrifluoroacetone, Hstta) was studied. although the extractability of lanthanides in the Hstta system was a little inferior that in the 4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedoine (thenoytrifluoroacetone, Htta) system, the Hstta system showed higher selectivity for the separation of heavy lanthanides than Htta owing to the softness of sulfur donor in Hstta. (authors)
Original Title
Selective en extraction par solvant des lanthanides avec le 1,1,1-trifluoro-4-(2-thienyl)-3-butene-2-one
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Journal Article
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Bentley, P.
Sheffield Univ. (United Kingdom)1999
Sheffield Univ. (United Kingdom)1999
AbstractAbstract
[en] This thesis reports on the synthesis and characterisation of various poly(phenylenevinylene) (PPV) polymers with various structure and using various polymerisation methods to investigate the stereoregularity of the materials and with an aim to produce polarised electroluminescence. The Wittig reaction has been used to prepare both main-chain and flexible spacer PPV materials. A series of model compounds based upon distyrylbenzene was also synthesised as an aid to fully characterising the above polymers. These materials were incorporated into LED devices to test their emissive properties. With an aim to produce more stereoregular materials, the Wadsworth-Emmons reaction was employed to re-synthesise the main-chain and the flexible spacer polymers. The resultant polymers were of much higher stereoregularity and molecular weight. The electroluminescent characteristics showed a slight improvement over those from the Wittig materials. The Heck reaction was also used to synthesise the main-chain PPV materials to compare the stereoregularity of the resultant materials. The above materials were investigated using X-ray diffraction to understand the liquid crystalline behaviour of the polymer melts. Reactive mesogens were also synthesised as an alternate route to producing aligned fluorescent films that could be incorporated into a LED. Compounds that showed liquid-Crystallinity over a wide temperature were developed and then photo-polymerised into an intractable network. (author)
Source
Feb 1999; [vp]; Available from British Library Document Supply Centre- DSC:DXN032494; Thesis (Ph.D.)
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Miscellaneous
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Thesis/Dissertation
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AbstractAbstract
No abstract available
Original Title
Effect of concentration on efficiency of organic vapor respiration cartridge for acetone and benzene
Primary Subject
Source
Odell, B.N. (ed.); California Univ., Livermore (USA). Lawrence Livermore Lab; p. 6-8; 29 Mar 1973
Record Type
Report
Literature Type
Progress Report
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Barelko, E.V.; Kartashova, L.I.; Komarov, P.N.; Proskurnin, M.A.
Large radiation sources in industry. Proceedings of a conference on the application of large radiation sources in industry. V. I1960
Large radiation sources in industry. Proceedings of a conference on the application of large radiation sources in industry. V. I1960
AbstractAbstract
[en] This paper describes the results of experiments by the writers with radioinitiation of chain branched reactions of the oxidation of organic compounds. The function of radiation as an initiating agent is described with reference to the oxidation of several unsaturated hydrocarbons and butanol. The reaction is self-accelerating and proceeds spontaneously after radiation has ceased. A detailed investigation was made of a process from oxidizing benzene, which has a high radiation resistance. The writers devised a method of sensitizing the radioinitiation of the oxidation of radiation-resistant substances by chemically inert but non-radiation-resistant substances. The main quantitative features of the process for the radiooxidation of benzene are stated to be the accumulation of various reaction products, and the effect of temperature, pressure, power and radiation dosage on the process of such accumulation. Information was obtained about the mechanism of the process. The design of circulating equipment is described. (author)
[fr]
Dans ce memoire, les auteurs presentent les resultats d'une etude consacree a l'amorcage sous rayonnement de reactions, d'oxydation des composes organiques, par ramification en chaine. Ils montrent le role des rayonnements en tant qu'agents d'amorcage de la reaction, en citant comme exemples l'oxydation de certains hydrocarbures non satures et du butanol. La reaction possede un caractere d'auto-acceleration et continue spontanement lorsque l'action des rayonnements a cesse. La reaction d'oxydation du benzene a ete etudiee en detail; elle est caracterisee par la haute stabilite de la substance vis-a-vis de l'action des rayonnements. Les auteurs formulent les principes de la sensibilisation, par l'action de substances instables vis-a-vis des rayonnements de l'amorcage sous rayonnement de la reaction d'oxydation de substances stables vis-a-vis des rayonnements et chimiquement inertes. Le memoire fournit les caracteristiques quantitatives fondamentales de la reaction d'oxydation par radiolyse du benzene : accumulation des divers produits de la reaction, action de la temperature, de la pression, de la puissance et de la dose d'irradiation sur le processus d'accumulation des produits de la reaction. Quelques conclusions sont exposees sur le mecanisme de la reaction. Les auteurs decrivent la construction de l'installation qui fonctionne en circuit ferme. (author)[es]
Figuran en esta memoria los resultados de los trabajos efectuados por los autores sobre la radioiniciacion de las reacciones de oxidacion de compuestos organicos en cadenas ramificadas. Se demuestra el papel que desempenan las radiaciones como agente de iniciacion, tomando como ejemplo la oxidacion del butanol y de varios hidrocarburos no saturados. La reaccion tiene caracter autoacelerador y prosigue espontaneamente al cesar la irradiacion. Se ha estudiado detalladamente el proceso de oxidacion del benceno, compuesto que se caracteriza por una elevada resistencia a las radiaciones. Los autores han ideado un metodo para sensibilizar la radioiniciacion de la oxidacion de compuestos radioresistentes por sustancias quimicamente inertes, pero inestables frente a las radiaciones. En la memoria se examinan los principales factores de que depende la radiooxidacion del benceno, a saber, concentracion de los distintos productos de reaccion e influencia de la temperatura, de la presion, de la energia y de la dosis de radiacion en el proceso de acumulacion de esos productos. Los autores formulan tambien algunas conclusiones sobre el mecanismo del proceso y describen la construccion de la instalacion de circulacion. (author)[ru]
V doklade predstavleny rezul'taty issledovanij avtorov po radiatsionnomu initsiirovaniyu tsepnykh razvetvlennykh reaktsij okisleniya organicheskikh soedinenij. Na primere okisleniya nekotorykh nenasyshchennykh uglevodorodov i butanola pokazana rol' izlucheniya kak initsiiruyushchego agenta. Reaktsiya imeet avtouskoryayushchijsya kharakter i idet samoproizvol'no posle prekrashcheniya dejstviya izlucheniya. Podrobno issledovan protsess okisleniya benzola, dlya kotorogo kharakterna povyshennaya ustojchivost' k dejstviyu izlucheniya. Avtory sformulirovali printsip sensibilizatsii radiatsionnogo initsiirovaniya protsessa okisleniya radiatsionno-stojkikh veshchestv khimicheski inertnymi, radiatsionno-nestojkimi veshchestvami. Privedeny osnovnye kolichestvennye kharakteristiki protsessa radio liticheskogo okisleniya benzola : nakoplenie razlichnykh produktov reaktsii, vliyanie temperatury, davleniya, moshchnosti i dozy izlucheniya na protsess nakopleniya produktov reaktsii. Sdelany nekotorye vyvody o mekhanizme protsessa. Privedena konstruktsiya ustanovki, rabotayushchaya po tsirkulyatsionnomu sposobu. (author)Original Title
Amorcage sous rayonnement des reactions par ramification en chaine; sensibilisation du processus; Radiatsionnoe initsiirovanie tsennykh razvetvlennykh reaktsij i ego sensibilizatsiya; Radioiniciacion de reacciones en cadena ramificadas y medios para aumentar su sensibilidad
Primary Subject
Source
International Atomic Energy Agency, Vienna (Austria); 492 p; Jul 1960; p. 407-421; Conference on the application of large radiation sources in industry; Warsaw (Poland); 8-12 Sep 1959; ISSN 0074-1884;
; 11 figs., 18 refs.

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Book
Literature Type
Conference
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AbstractAbstract
[en] The surface modification of silica particles (SPs) was systemically conducted by the treatment of 0.1-10 wt % phenylsilanetriol (PST) on the basis of SPs used through two step processes: 1) the PST coating of SPs via evaporation under reduced pressure and 2) their thermal condensation leading to Si-O-Si bond formation via heating at 130 .deg. C. The evaluation of the modified SPs was conducted by the simple floating test on water and the measurement of the contact angle (CA) of water droplet on the 2-dimensional layer of modified SPs on slide glass. When PST was used about 2 wt % or above on the basis of SPs (about average size: 50 nm) used, the modified SPs were fully floated on the water and all dispersed into upper organic solvent layer after a shaking with the mixture of the water and benzene, indicating that the modified SPs have hydrophobic properties. The modified SPs were characterized by 29Si MAS NMR and physicochemical properties including SEM, TEM, BET, adsorption/desorption isotherms, etc. were measured and compared each other in details. This research demonstrates that the organosilanetriol is a good modifier applicable for the surface modification of inorganic oxide particles using a low amount of modifier on the basis of oxide particles used
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Source
31 refs, 6 figs, 2 tabs
Record Type
Journal Article
Journal
Bulletin of the Korean Chemical Society; ISSN 0253-2964;
; v. 34(12); p. 3805-3810

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Ojeda, J.H.; Medina, F.G.; Becerra-Alonso, David, E-mail: judith.ojeda@uptc.edu.co2017
AbstractAbstract
[en] The electronic properties are studied using a finite homogeneous molecule called Trans-platinum-linked oligo(tetraethenylethenes). This system is composed of individual molecules such as benzene rings, platinum, Phosphore and Sulfur. The mechanism for the study of the electron transport through this system is based on placing the molecule between metal contacts to control the current through the molecular system. We study this molecule based on the tight-binding approach for the calculation of the transport properties using the Landauer-Büttiker formalism and the Fischer-Lee relationship, based on a semi-analytic Green's function method within a real-space renormalization approach. Our results show a significant agreement with experimental measurements.
Primary Subject
Source
S138694771730718X; Available from http://dx.doi.org/10.1016/j.physe.2017.07.025; Copyright (c) 2017 Elsevier B.V. All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Physica E. Low-Dimensional Systems and Nanostructures (Print); ISSN 1386-9477;
; v. 94; p. 78-86

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Kajumov, A.; Mirsaidov, U.M.
Academy of Siences of Republic of Tajikistan, Dushanbe (Tajikistan)2005
Academy of Siences of Republic of Tajikistan, Dushanbe (Tajikistan)2005
AbstractAbstract
[en] The new complex compound [V O(BzH)5](B11H11CH)2 have been synthesized and their properties have investigated. The compound of monodentatium of benzoilgydrazinium with the oxigenum of carboline group and external sphere of closo-borate was defined by analysis of IR-spectra
Original Title
Koordinactionnoe soedinenie vanadila s benzoilgidrazinom i poliedricheskim klozo-boratnim anionom B11H11CH
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Source
Available from Tajik INIS Center
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Journal Article
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AbstractAbstract
[en] In homoaromatic systems, isotopic exchange (18F/19F) was previously (J Label Compd Radiopharm 18(12):1721-1730 [2], J Chem Soc Perkin Trans 1(3):295-298 [3]) proven to be advantageous, yet in general specific activity is thought to be low. For heteroaromatic systems, in particular, very few examples are published regarding the 18F-labelling of 2-substituted pyridines (J Label Compd Radiopharm 42:975-985 [9]). Therefore, in 2-fluoropyridines, we decided to study the 18F labelling by isotopic exchange (18F/19F). The radiochemical yield for 2-fluoropyridine was 90 ± 2%. Even if 2-fluoropyridine was substituted by an electron-donating group such as a methyl or a methoxy group, radiochemical yields were 80 ± 1 and 78 ± 1%, respectively. Although in benzenes, these substituents are known to decrease nucleophilic substitutions by 18F-Fluoride significantly. Moreover, by choosing appropriate concentrations of 2-fluoropyridines, reasonably high specific activities up to 10 GBq/μmol were obtained. (author)
Primary Subject
Source
14 refs.
Record Type
Journal Article
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731;
; CODEN JRNCDM; v. 287(1); p. 287-292

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