The Experts below are selected from a list of 93 Experts worldwide ranked by ideXlab platform
Venkat R Ragavan - One of the best experts on this subject based on the ideXlab platform.
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an efficient one step chemoselective reduction of alkyl ketones over aryl ketones in β diketones using lihmds and lithium Aluminium Hydride
Tetrahedron Letters, 2012Co-Authors: S Veeraswamy, Indrasena K Reddy, Venkat R Ragavan, Tirumal K Reddy, Satyanarayana Yennam, Alladi JayashreeAbstract:β-Hydroxy ketones were synthesized in one-pot from β-diketones by reducing alkyl ketones chemoselectively by keeping aryl ketone intact. Initially, β-diketones were enolized using LiHMDS and later alkyl ketone was chemoselectively reduced efficiently by lithium Aluminium Hydride. This method produces β- hydroxyl ketones from the corresponding β-diketones in high yield.
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efficient one pot selective reduction of esters in β ketoesters using lihmds and lithium Aluminium Hydride
Tetrahedron Letters, 2011Co-Authors: K Sivagurunathan, Raja Mohamed S Kamil, Syed Shafi, Liakth Ali F Khan, Venkat R RagavanAbstract:Abstract The ester functionality in β-keto esters is selectively reduced in one-pot, first by enolization using LiHMDS and then reduced with lithium Aluminium Hydride. This method produces β-hydroxyl ketones from the corresponding β-keto esters in high yield.
Kondofrancois Agueyzinsou - One of the best experts on this subject based on the ideXlab platform.
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formation of Aluminium Hydride alh3 via the decomposition of organoAluminium and hydrogen storage properties
International Journal of Hydrogen Energy, 2017Co-Authors: Lei Wang, Aditya Rawal, Zakaria Quadir, Kondofrancois AgueyzinsouAbstract:Abstract Aluminium Hydride (AlH3) is a promising hydrogen storage material due to its competitive hydrogen storage density and moderate decomposition temperature. However, there is no convenient way to prepare/regenerate AlH3 from (spent) Al by direct hydrogenation. Herein, we report on a novel approach to generate AlH3 from the decomposition of triethylAluminium (Et3Al) under mild hydrogen pressures (10 MPa) with the use of surfactants. With tetraoctylammonium bromide (TOAB), the synthesis led to the formation of nanosized AlH3 with the known α phase, and these nanoparticles released hydrogen from 40 °C instead of the 125 °C observed with bulk α-AlH3. However, when tetrabutylammonium bromide (TBAB) was used instead of TOAB, larger nanoparticles believed to be related to the formation of β-AlH3 were obtained, and these decomposed through a single exothermic process. Despite the possibility to form α-AlH3 under low conditions of temperature (180 °C) and pressure (10 MPa), TOAB stabilised AlH3 was found to be irreversible when subjected to hydrogen cycling at 150 °C and 7 MPa hydrogen pressure.
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nanoconfined lithium Aluminium Hydride lialh4 and hydrogen reversibility
International Journal of Hydrogen Energy, 2017Co-Authors: Lei Wang, Aditya Rawal, Zakaria Quadir, Kondofrancois AgueyzinsouAbstract:Abstract Lithium Aluminium Hydride (LiAlH4) is a promising hydrogen storage material with a storage capacity of 10.6 mass % H2. However, its practical use is hampered by the lack of direct rehydrogenation routes. In this study, we report on the confinement of LiAlH4 into the nanoporosity of a high surface area graphite resulting in a remarkable improvement of its hydrogen storage properties. Nanoconfined LiAlH4 started hydrogen desorption near 135 °C and after full dehydrogenation at 300 °C limited rehydrogenation was observed at the same temperature and 7 MPa of hydrogen pressure. Rehydrogenation took place through the formation of Li3AlH6 with some limited rehydrogenation back to LiAlH4 indicating the existence of different (de)hydrogenation paths upon nanoconfinement as compared to the known dehydrogenation path of bulk LiAlH4.
J. G. Noltes - One of the best experts on this subject based on the ideXlab platform.
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Investigations on organo‐tin compounds. XII. The action of lithium Aluminium Hydride and grignard reagents on organo‐tin nitriles and esters
Journal of Applied Chemistry, 2007Co-Authors: G. J. M. Der Van Kerk, J. G. NoltesAbstract:Reactions of cyanoalkyl- and methoxycarbonylalkyl-tin compounds with lithium Aluminium Hydride and Grignard reagents have been studied. Several new organo-tin compounds containing hydroxyalkyl, aminoalkyl and ketoalkyl groups are described.
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investigations on organo tin compounds xii the action of lithium Aluminium Hydride and grignard reagents on organo tin nitriles and esters
Journal of Chemical Technology & Biotechnology, 2007Co-Authors: G Der J M Van Kerk, J. G. NoltesAbstract:Reactions of cyanoalkyl- and methoxycarbonylalkyl-tin compounds with lithium Aluminium Hydride and Grignard reagents have been studied. Several new organo-tin compounds containing hydroxyalkyl, aminoalkyl and ketoalkyl groups are described.
Zakaria Quadir - One of the best experts on this subject based on the ideXlab platform.
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formation of Aluminium Hydride alh3 via the decomposition of organoAluminium and hydrogen storage properties
International Journal of Hydrogen Energy, 2017Co-Authors: Lei Wang, Aditya Rawal, Zakaria Quadir, Kondofrancois AgueyzinsouAbstract:Abstract Aluminium Hydride (AlH3) is a promising hydrogen storage material due to its competitive hydrogen storage density and moderate decomposition temperature. However, there is no convenient way to prepare/regenerate AlH3 from (spent) Al by direct hydrogenation. Herein, we report on a novel approach to generate AlH3 from the decomposition of triethylAluminium (Et3Al) under mild hydrogen pressures (10 MPa) with the use of surfactants. With tetraoctylammonium bromide (TOAB), the synthesis led to the formation of nanosized AlH3 with the known α phase, and these nanoparticles released hydrogen from 40 °C instead of the 125 °C observed with bulk α-AlH3. However, when tetrabutylammonium bromide (TBAB) was used instead of TOAB, larger nanoparticles believed to be related to the formation of β-AlH3 were obtained, and these decomposed through a single exothermic process. Despite the possibility to form α-AlH3 under low conditions of temperature (180 °C) and pressure (10 MPa), TOAB stabilised AlH3 was found to be irreversible when subjected to hydrogen cycling at 150 °C and 7 MPa hydrogen pressure.
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nanoconfined lithium Aluminium Hydride lialh4 and hydrogen reversibility
International Journal of Hydrogen Energy, 2017Co-Authors: Lei Wang, Aditya Rawal, Zakaria Quadir, Kondofrancois AgueyzinsouAbstract:Abstract Lithium Aluminium Hydride (LiAlH4) is a promising hydrogen storage material with a storage capacity of 10.6 mass % H2. However, its practical use is hampered by the lack of direct rehydrogenation routes. In this study, we report on the confinement of LiAlH4 into the nanoporosity of a high surface area graphite resulting in a remarkable improvement of its hydrogen storage properties. Nanoconfined LiAlH4 started hydrogen desorption near 135 °C and after full dehydrogenation at 300 °C limited rehydrogenation was observed at the same temperature and 7 MPa of hydrogen pressure. Rehydrogenation took place through the formation of Li3AlH6 with some limited rehydrogenation back to LiAlH4 indicating the existence of different (de)hydrogenation paths upon nanoconfinement as compared to the known dehydrogenation path of bulk LiAlH4.
Lei Wang - One of the best experts on this subject based on the ideXlab platform.
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formation of Aluminium Hydride alh3 via the decomposition of organoAluminium and hydrogen storage properties
International Journal of Hydrogen Energy, 2017Co-Authors: Lei Wang, Aditya Rawal, Zakaria Quadir, Kondofrancois AgueyzinsouAbstract:Abstract Aluminium Hydride (AlH3) is a promising hydrogen storage material due to its competitive hydrogen storage density and moderate decomposition temperature. However, there is no convenient way to prepare/regenerate AlH3 from (spent) Al by direct hydrogenation. Herein, we report on a novel approach to generate AlH3 from the decomposition of triethylAluminium (Et3Al) under mild hydrogen pressures (10 MPa) with the use of surfactants. With tetraoctylammonium bromide (TOAB), the synthesis led to the formation of nanosized AlH3 with the known α phase, and these nanoparticles released hydrogen from 40 °C instead of the 125 °C observed with bulk α-AlH3. However, when tetrabutylammonium bromide (TBAB) was used instead of TOAB, larger nanoparticles believed to be related to the formation of β-AlH3 were obtained, and these decomposed through a single exothermic process. Despite the possibility to form α-AlH3 under low conditions of temperature (180 °C) and pressure (10 MPa), TOAB stabilised AlH3 was found to be irreversible when subjected to hydrogen cycling at 150 °C and 7 MPa hydrogen pressure.
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nanoconfined lithium Aluminium Hydride lialh4 and hydrogen reversibility
International Journal of Hydrogen Energy, 2017Co-Authors: Lei Wang, Aditya Rawal, Zakaria Quadir, Kondofrancois AgueyzinsouAbstract:Abstract Lithium Aluminium Hydride (LiAlH4) is a promising hydrogen storage material with a storage capacity of 10.6 mass % H2. However, its practical use is hampered by the lack of direct rehydrogenation routes. In this study, we report on the confinement of LiAlH4 into the nanoporosity of a high surface area graphite resulting in a remarkable improvement of its hydrogen storage properties. Nanoconfined LiAlH4 started hydrogen desorption near 135 °C and after full dehydrogenation at 300 °C limited rehydrogenation was observed at the same temperature and 7 MPa of hydrogen pressure. Rehydrogenation took place through the formation of Li3AlH6 with some limited rehydrogenation back to LiAlH4 indicating the existence of different (de)hydrogenation paths upon nanoconfinement as compared to the known dehydrogenation path of bulk LiAlH4.