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Journal articles on the topic '1,2-epoxyoctane'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Wang, Yang-yang, Ya-wei Liu, Xu Kang, Xiao-li Zhao, Lin Wang, Chuo-zhao Hu, Fu-yi Liu, Liu-si Sheng, and Lin-fan Zhu. "Dissociative Photoionization of 1,2-Epoxyoctane Studied with Synchrotron Radiation." Chinese Journal of Chemical Physics 29, no. 5 (October 27, 2016): 533–38. http://dx.doi.org/10.1063/1674-0068/29/cjcp1603053.

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2

Krieg, H. "Resolution of 1,2-epoxyoctane by enantioselective catalytic hydrolysis in a membrane bioreactor." Journal of Membrane Science 180, no. 1 (December 1, 2000): 69–80. http://dx.doi.org/10.1016/s0376-7388(00)00525-1.

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3

Lee, Siew Ling, Hadi Nur, and Soo Chien Wei. "Effect of Acid Treatment on Silica-Titania Aerogel as Oxidative-Acidic Bifunctional Catalyst." Applied Mechanics and Materials 110-116 (October 2011): 457–64. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.457.

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Acid treatment using H2SO4, HCl and H3PO4 has been carried out in an attempt to improve catalytic performance of silica-titania aerogel. X-ray diffraction results showed the amorphous structure of the aerogels remained after the acid impregnation and calcinations steps. Hammert analysis revealed these acid modified silica-titania aerogels were superacids with pKa < -14.52. Different Ti species was observed in the samples upon the acid treatment. As compared to silica-titania aerogel, Lewis acidity increased remarkably in HCl treated sample without formation of any Brønsted acid site. Meanwhile, H2SO4 and H3PO4 treated samples possessed both Lewis and Brønsted acid sites. The catalytic performance of these samples was evaluated through a consecutive transformation of 1-octene to 1,2-octanediol through the formation of 1,2-epoxyoctane using aqueous hydrogen peroxide as oxidant.

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4

van der Meer, A. B., W. A. Miedema, K. Ch A. M. Luyben, and A. A. C. M. Beenackers. "Modelling the inhibitory effect of 1,2-epoxyoctane on the growth kinetics of Pseudomonas oleovorans." Chemical Engineering Journal and the Biochemical Engineering Journal 53, no. 1 (November 1993): B13—B24. http://dx.doi.org/10.1016/0923-0467(93)80012-l.

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5

Krieg, H. M., A. L. Botes, M. S. Smit, J. C. Breytenbach, and K. Keizer. "The enantioselective catalytic hydrolysis of racemic 1,2-epoxyoctane in a batch and a continuous process." Journal of Molecular Catalysis B: Enzymatic 13, no. 1-3 (April 2001): 37–47. http://dx.doi.org/10.1016/s1381-1177(00)00229-0.

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6

Serrano, David P., Rafael van Grieken, Juan Antonio Melero, and Alicia García. "Effect of the Al-MCM-41 properties on the catalytic liquid phase rearrangement of 1,2-epoxyoctane." Applied Catalysis A: General 319 (March 2007): 171–80. http://dx.doi.org/10.1016/j.apcata.2006.12.001.

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7

Nur, Hadi, Izan Izwan Misnon, and Lim Kheng Wei. "Stannic Oxide-Titanium Dioxide Coupled Semiconductor Photocatalyst Loaded with Polyaniline for Enhanced Photocatalytic Oxidation of 1-Octene." International Journal of Photoenergy 2007 (2007): 1–6. http://dx.doi.org/10.1155/2007/98548.

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Stannic oxide-titanium dioxide (SnO2–TiO2) coupled semiconductor photocatalyst loaded with polyaniline (PANI), a conducting polymer, possesses a high photocatalytic activity in oxidation of 1-octene to 1,2-epoxyoctane with aqueous hydrogen peroxide. The photocatalyst was prepared by impregnation ofSnO2and followed by attachment of PANI onto aTiO2powder to give sample PANI-SnO2–TiO2. The electrical conductivity of the system becomes high in the presence of PANI. Enhanced photocatalytic activity was observed in the case of PANI-SnO2–TiO2compared to PANI-TiO2,SnO2–TiO2, andTiO2. A higher photocatalytic activity in the oxidation of 1-octene on PANI-SnO2–TiO2thanSnO2–TiO2, PANI-TiO2, andTiO2can be considered as an evidence of enhanced charge separation of PANI-SnO2–TiO2photocatalyst as confirmed by photoluminescence spectroscopy. It suggests that photoinjected electrons are tunneled fromTiO2toSnO2and then to PANI in order to allow wider separation of excited carriers.

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8

Jaiswal, Pooja, and Mahesh N. Varma. "Catalytic performance of imidazolium based ILs in the reaction of 1,2-epoxyoctane and carbon dioxide: Kinetic study." Journal of CO2 Utilization 14 (June 2016): 93–97. http://dx.doi.org/10.1016/j.jcou.2016.03.005.

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9

van Grieken, Rafael, David P. Serrano, Juan Antonio Melero, and Alicia García. "Effect of the solvent in the liquid phase rearrangement of 1,2-epoxyoctane over Al-MCM-41 and Al-TS-1 catalysts." Journal of Molecular Catalysis A: Chemical 222, no. 1-2 (November 2004): 167–74. http://dx.doi.org/10.1016/j.molcata.2004.07.019.

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10

KAWAKAMI, KOEI. "Characterization of Production of 1,2-Epoxyoctane from 1-Octene by Nongrowing Cells of Nocardia corallina B-276 in Aqueous-Organic Media." Annals of the New York Academy of Sciences 613, no. 1 Enzyme Engine (December 1990): 707–11. http://dx.doi.org/10.1111/j.1749-6632.1990.tb18250.x.

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11

Bennett, Charmaine K., Mihir N. Bhagat, Youlong Zhu, Ying Yu, Arjun Raghuraman, Matthew E. Belowich, SonBinh T. Nguyen, Justin M. Notestein, and Linda J. Broadbelt. "Strong Influence of the Nucleophile on the Rate and Selectivity of 1,2-Epoxyoctane Ring Opening Catalyzed by Tris(pentafluorophenyl)borane, B(C6F5)3." ACS Catalysis 9, no. 12 (October 30, 2019): 11589–602. http://dx.doi.org/10.1021/acscatal.9b02607.

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12

Yu, Ying, Youlong Zhu, Mihir N. Bhagat, Arjun Raghuraman, Kurt F. Hirsekorn, Justin M. Notestein, SonBinh T. Nguyen, and Linda J. Broadbelt. "Mechanism of Regioselective Ring-Opening Reactions of 1,2-Epoxyoctane Catalyzed by Tris(pentafluorophenyl)borane: A Combined Experimental, Density Functional Theory, and Microkinetic Study." ACS Catalysis 8, no. 12 (October 9, 2018): 11119–33. http://dx.doi.org/10.1021/acscatal.8b02632.

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13

Rödl, Christian, Jennifer Bissmeyer neé Malberg, and Robert Wolf. "Functionalization of 1,3-diphosphacyclobutadiene cobalt complexes via Si–P bond insertion." Zeitschrift für Naturforschung B 73, no. 11 (November 27, 2018): 895–909. http://dx.doi.org/10.1515/znb-2018-0121.

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AbstractWe report the synthesis of functionalized 1,3-bis(diphosphacyclobutadiene) complexes via the insertion of carbon-oxygen bonds of ethers, esters, aldehydes and amides into the P–Si bond of silylated complexes. Reactions of [K(tol)2][Co(η4-P2C2R2)2] [[K(tol)2][1a]: R=tBu, [K(tol)2][1b]: R=tPent (=tert-pentyl)] with Me3SiCl afford the trimethylsilyl-substituted derivatives [Co(η4-P2C2R2SiMe3)(η4-P2C2R2)] (2a,b, R=tBu, tPent). The Me3Si group is connected to a phosphorus atom of one of the 1,3-diphosphacyclobutadiene ligands. 2a,b readily react with organic substrates containing C–O single and C=O double bonds at ambient temperature. [Co(η4-P2C2R2(CH2)4OSiMe3)(η4-P2C2R2)] (3a, b) are formed by reaction of 2a, b with traces of THF. They can also be isolated by reacting the THF solvates [K(thf)2{Co(P2C2tBu2)2}] ([K(thf)2][1a]) and [K(thf)3{Co(P2C2tPent2)2}] ([K(thf)3][1b]) with Me3SiCl in toluene or THF. The adamantyl-substituted complex [Co(η4-P2C2Ad2(CH2)4OSiMe3)(η4-P2C2Ad2)] (3c) was prepared analogously from [K(thf)4{Co(P2C2Ad2)2}] and Me3SiCl. [K(thf)2][1a] reacts cleanly with Ph3SnCl affording [Co(η4-P2C2tBu2SnPh3)(η4-P2C2tBu2)] (4) in high yield. Reaction of 2a with styrene oxide affords [Co(η4-P2C2tBu2PhC2H3OSiMe3)(η4-P2C2tBu2)] (5) as a single regioisomer. By contrast, multinuclear NMR spectroscopic studies indicate mixtures of two isomeric insertion products 6/6′ and 7/7′, respectively, which result from the insertion of 1,2-epoxy-2-methylpropane and 1,2-epoxyoctane. Moreover, these monitoring studies show that reactions of 2a with acyclic ethers afford alkyl substituted complexes such as [Co(η4-P2C2tBu2Et)(η4-P2C2tBu2)] (8) and alkylsilyl ethers. Reaction of 2a with γ-butyrolactone gives [Co(η4-P2C2tBu2(CH2)3C(O)OSiMe3)(η4-P2C2tBu2)] (9) via cleavage of the endocyclic C–O single bond of the lactone. Benzaldehyde and acetone cleanly react with 2a to [Co(η4-P2C2tBu2CH(Ph)OSiMe3)(η4-P2C2tBu2)] (10) and [Co(η4-P2C2tBu2CMe2OSiMe3)(η4-P2C2tBu2)] (11), while the sterically more demanding ketones 3-pentanone and acetophenone selectively yield the known hydride complex [Co(η4-P2C2tBu2)2H] (A). Phenyl isocyanate reacts with 2a at elevated temperature to form [Co(η3-P2C2tBu2CON(Ph)SiMe3)(η4-P2C2tBu2)] (12) with a functionalized η3-coordinated ligand. [K(tol)2][1a], [K(tol)2][1b], 2a, 2b, 3a–c, 4, 5, and 9–12 were isolated and characterized by multinuclear NMR spectroscopy, UV/Vis spectroscopy and elemental analysis. [K(tol)2][1b], 2a, 2b, 3c, 4, 5, and 9–12 were additionally characterized by X-ray crystallography.

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14

Lee, Siew Ling, Swee Ean Lim, and Salasiah Che Me. "Tungsten-oxide modified silica-titania oxidative-acidic bifunctional catalyst for diol synthesis." Malaysian Journal of Fundamental and Applied Sciences 12, no. 1 (June 14, 2016). http://dx.doi.org/10.11113/mjfas.v12n1.408.

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Oxidative-acidic bifunctional catalysts of tungsten oxide modified silica-titania,xW/TiO2-SiO2 (x=1, 5, 10 wt%) were successfully synthesized and characterized. Both XRD and UV-Vis analyses results indicated presence of WO3 phase in samples with higher dopant amount. It also revealed tetrahedral Ti and octahedral coordinated existed as the dominant species in the samples. FTIR analysis suggested formation of Si-O-W in the tungsten oxide modified samples. The catalytic performance of the samples was evaluated via consecutive transformation of 1-octene to 1,2-octanediol through the conversion of 1,2-epoxyoctane using aqueous H2O2 as oxidant. While TiO2-SiO2 and 1W/TiO2-SiO2 showed no catalytic activity in yielding diol, samples 5W/TiO2-SiO2 and 10W/TiO2-SiO2 exhibited bifunctional catalytic activity. It has been demonstrated that sample 10W/TiO2-SiO2 was the best oxidative-acidic bifuntional catalyst which produced 321 μmol 1,2-epoxyoctane and 51 μmol 1,2-octanediol after 24 h reaction.

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15

Che Mi, Salasiah, Hadi Nur, and Lee Siew Ling. "Novel oxidative-acidic bifunctional catalyst of tungsten-phosphate modified silica-titania." Malaysian Journal of Fundamental and Applied Sciences 11, no. 3 (November 23, 2015). http://dx.doi.org/10.11113/mjfas.v11n3.381.

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A novel oxidative-acidic bifunctional catalyst of silica-titania supported tungsten-phosphate was successfully synthesized and characterized. Different tungsten amount was impregnated into silica-titania followed by phosphoric acid treatment via sol gel method. The impregnation of WO3 and PO43- into TiO2-SiO2 followed by drying and calcination gave the white colour to the samples. X-ray diffractograms of the samples showed the structures of TiO2-SiO2 remained as amorphous structure after loading of WO3 and PO43-. The catalytic performance of the samples of PO43-/xW/TiO2-SiO2, (x = 1 and 5 wt %) as bifunctional catalyst in the formation of 1,2-octanediol through conversion of 1-octene to 1,2-epoxyoctane using aqueous H2O2 as an oxidant was evaluated. It has been demonstrated that PO43-/5W/TiO2-SiO2 was an active bifunctional oxidative-acidic catalyst in producing 1,2-octanediol from 1-octene.

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16

Lee, Siew Ling, Soo Chien Wei, Hadi Nur, and Halimaton Hamdan. "Enhancement of Brønsted Acidity in Sulfate-Vanadium Treated Silica-Titania Aerogel as Oxidative-Acidic Bifunctional Catalyst." International Journal of Chemical Reactor Engineering 8, no. 1 (March 29, 2010). http://dx.doi.org/10.2202/1542-6580.2289.

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Enhancement of Brønsted acidity in silica-titania aerogel was achieved by loading both sulfate and vanadium onto the material. This phenomena could be due to formation of V(OSi)2OH-O-SO3- in the resulted sample. In contrast, no noticeable Brønsted acidity was detected in vanadium loaded silica-titania aerogel (V/ST). UV-vis DR analysis results showed that the amount of hydrated tetrahedral titanium species, which acts as oxidative site, increased significantly upon sulfation and vanadium loading on the surface of the aerogel. However, presence of vanadium in the samples tended to transform framework tetrahedral titanium to extra framework octahedral titanium structure. The catalytic performance of the samples were evaluated in consecutive transformation of 1-octene to 1,2-octanediol through formation of 1,2-epoxyoctane using aqueous H2O2.

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17

Zulkeple, Nor Masdiana, Norhasyimah Mohd Kamal, Jamilah Mohd Ekhsan, Salasiah Che Me, Swee Ean Lim, and Siew Ling Lee. "Properties and catalytic performance of sulphate-vanadia impregnated fumed silica as oxidative catalyst." Malaysian Journal of Fundamental and Applied Sciences 11, no. 2 (July 9, 2015). http://dx.doi.org/10.11113/mjfas.v11n2.372.

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A series of sulphate-vanadia impregnated fumed silica oxidative catalysts were synthesized via impregnation method. The samples were prepared by impregnation of 1 wt% of vanadium and 0.2 M of sulphuric acid onto fumed silica as support. Surface area of the silica supported samples were similar of 118 m2/g. UV-Vis DRS results showed existence of o supported V species and the charge transfer bands associated with O2- to V5+ in tetrahedral environments. Catalytic performance were evaluated via epoxidation of 1-octene to 1,2-epoxyoctane using hydrogen peroxide as an oxidant. It had been demonstrated that sulphate-vanadia impregnated fumed silica had high catalytic activity of 626 ± 0.2 mmol epoxide was produced after 24 h reaction. This may indicate that more oxidative sites were generated after the impregnation of V and sulphate onto the SiO2 matrixes.

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