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Thomas E Albrechtschmitt - One of the best experts on this subject based on the ideXlab platform.
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from order to disorder and back again in situ hydrothermal redox reactions of uranium Phosphites and phosphates
Inorganic Chemistry, 2013Co-Authors: Eric M. Villa, Connor J Marr, Juan Diwu, Evgeny V Alekseev, Wulf Depmeier, Thomas E AlbrechtschmittAbstract:Five new uranium Phosphites, phosphates, and mixed phosphate–phosphite compounds were hydrothermally synthesized using H3PO3 as an initial reagent. These compounds are Cs4[(UO2)8(HPO4)5(HPO3)5]·4H2O (1), Cs[UIV(PO4)(H1.5PO4)]2 (2), Cs4[UIV6(PO4)8(HPO4)(HPO3)] (3), Cs10[UIV10(PO4)4(HPO4)14(HPO3)5]·H2O (4), and Cs3[UIV4(PO4)3(HPO4)5] (5). The first contains uranium(VI) and the latter four uranium(IV). Of the UIV structures, two have extensive disordering among the cesium cation positions, one of which also contains disordering at some of the phosphate–phosphite positions. These intermediate compounds are bookended by nondisordered phases. The isolation of these transitional phases occurred at the higher of the pH conditions attempted here. Both the starting pH and the duration of the reactions have a strong influence on the products formed. Herein, we explore the second series of in situ hydrothermal redox reactions of uranyl nitrate with phosphorous acid and cesium carbonate. The isolation of these disorde...
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systematic evolution from uranyl vi Phosphites to uranium iv phosphates
ChemInform, 2012Co-Authors: Eric M. Villa, Connor J Marr, Evgeny V Alekseev, Wulf Depmeier, Laurent Jouffret, Thomas E AlbrechtschmittAbstract:In situ hydrothermal redox reactions of uranyl nitrate with phosphorous acid and alkali metal carbonates are explored and six new uranium Phosphites, phosphates, and phosphite/phosphate mixed compounds are synthesized hydrothermally and one uranyl phosphite is obtained at room temperature.
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systematic evolution from uranyl vi Phosphites to uranium iv phosphates
Inorganic Chemistry, 2012Co-Authors: Eric M. Villa, Connor J Marr, Evgeny V Alekseev, Wulf Depmeier, Laurent Jouffret, Thomas E AlbrechtschmittAbstract:Six new uranium Phosphites, phosphates, and mixed phosphate–phosphite compounds were hydrothermally synthesized, with an additional uranyl phosphite synthesized at room temperature. These compounds can contain UVI or UIV, and two are mixed-valent UVI/UIV compounds. There appears to be a strong correlation between the starting pH and reaction duration and the products that form. In general, Phosphites are more likely to form at shorter reaction times, while phosphates form at extended reaction times. Additionally, reduction of uranium from UVI to UIV happens much more readily at lower pH and can be slowed with an increase in the initial pH of the reaction mixture. Here we explore the in situ hydrothermal redox reactions of uranyl nitrate with phosphorous acid and alkali-metal carbonates. The resulting products reveal the evolution of compounds formed as these hydrothermal redox reactions proceed forward with time.
Arbuzov B. - One of the best experts on this subject based on the ideXlab platform.
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Synthesis of esters of phosphonic acids containing heterocyclic radicals - communication 4. Esters of phosphonic acids containing isoxazole and quinoxaline radicals
2020Co-Authors: Arbuzov B.Abstract:1. Reaction of sodium dialkyl phosphite and of trialkyl phosphite with 3-chloromethylisoxazole gave esters of phosphonic acids containing the isoxazole ring. 2. Reaction of trialkyl Phosphites with 2,3-di(ω-bromomethyl)-quinoxaline led to the methyl, ethyl and isopropyl esters of 2,3-di(phosphonomethyl)-quinoxaline. 3. The phosphonic ester could not be isolated after reaction of sodium diethyl phosphite with 2,3-di-(ω-bromomethyl)-quinoxaline. 4. Diethylphosphorous acid adds on to quinoxaline under the influence of sodium alcoholate to form 1,4-dihydro-2,3-di(diethylphosphono)-quinoxaline. © 1954 Consultants Bureau, Inc
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Reactions of trialkyl Phosphites with nitrosyl and nitryl chlorides
2020Co-Authors: Arbuzov B., Ukhvatova E.Abstract:1. Treatment of trialkyl Phosphites with nitrosyl or nitryl chloride led to oxidation to trialkyl phosphates. 2. The reaction of triethyl phosphite in both cases also yielded a small quantity of tetraethyl pyrophosphate. © 1959 Consultants Bureau Inc
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Action of trialkyl Phosphites on 10-bromoanthrone and methyleneanthrone
2020Co-Authors: Arbuzov B., Ibragimova N.Abstract:1. Trialkyl Phosphites undergo a Perkow reaction with 10-bromoanthrone with the formation of an anthryl dialkyl phosphite. 2. Triethyl phosphite adds to methyleneanthrone with the formation of diethyl 9-ethoxy-10-anthrylmethylphosphonate. © 1967 Consultants Bureau
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Synthesis of phosphonic esters containing heterocyclic groups - Communication 6. Reaction of phosphorous esters with 2-furaldehyde, 2-furoic acid, and 2-furanacrylic acid
2020Co-Authors: Arbuzov B.Abstract:1. Triethyl and triisopropyl Phosphites, when reacting with 2-furaldehyde and with benzaldehyde, are partially oxidized to phosphoric esters with formation of 2,2′-vinylenedifuran and stilbene, respectively. 2. When triethyl phosphite reacts with 2-furoic acid and with 2-furanacrylic acid, the ethyl esters of these acids are formed. In the case of 2-furanacrylic acid, not only the formation of a 2-furanacrylic ester occurs, but also the addition of the trialkyl phosphite to 2-furanacrylic acid. © 1961 Consultants Bureau
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Reaction of trialkyl Phosphites with α, β-unsaturated acids
2020Co-Authors: Gazizov T., Pudovik A., Mareev Y., Arbuzov B.Abstract:1. The addition of trialkyl Phosphites to α, β-unsaturated acids can proceed via the prior protonization of the trialkyl Phosphites by the unsaturated acid. The dialkylphosphorous acids and unsaturated acid esters that are formed here react with each other to give the trialkyl esters of the corresponding β-phosphonocarboxylic acids. 2. Not excluded is the possibility that the above indicated reaction can also proceed simultaneously by the mechanism proposed by Kukhtin and Kamai, but without the formation of the cyclic phosphorane as the intermediate step. 3. Together with the trimethyl ester of β-phosphonopropionic acid, the cyclic anhydride of the methyl ester of β-phosphonopropionic acid is formed when trimethyl phosphite is reacted with acrylic acid. The cyclic anhydride is obtained in much larger amounts in the presence of acetic acid. The corresponding cyclic anhydride was isolated in the same manner when triethyl phosphite was reacted with methacrylic acid. © 1971 Consultants Bureau
Eric M. Villa - One of the best experts on this subject based on the ideXlab platform.
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New Uranyl Open Framework and Sheet Compounds Formed via In-Situ Protonation of Piperazine by Phosphorous Acid
MDPI AG, 2018Co-Authors: Eric M. Villa, Justin N. Cross, Thomas E. Albrecht-schmittAbstract:Two new uranyl compounds were hydrothermally synthesized employing piperazine as an organic templating agent. The piperazine was protonated in-situ by phosphorous acid, forming the piperazinium dication featured in these compounds. The two new structures presented here are a uranyl phosphite 2D sheet and a 3D uranyl mixed phosphite⁻phosphate network with cation occupied channels. Both included strong hydrogen bonding from the piperazinium cation to the uranyl phosphite or mixed phosphite⁻phosphate network. These two structures can be reliably formed through careful control of pH of the starting solution and the reaction duration. The piperazinium uranyl phosphite compound was the latest in a family of uranyl Phosphites, and demonstrates the structural versatility of this combination. The mixed phosphite⁻phosphate compound builds on hydrothermal redox chemistry, illustrating the variety of compounds that can be isolated by exploiting in-situ redox processes to elucidate new uranium structure types
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from order to disorder and back again in situ hydrothermal redox reactions of uranium Phosphites and phosphates
Inorganic Chemistry, 2013Co-Authors: Eric M. Villa, Connor J Marr, Juan Diwu, Evgeny V Alekseev, Wulf Depmeier, Thomas E AlbrechtschmittAbstract:Five new uranium Phosphites, phosphates, and mixed phosphate–phosphite compounds were hydrothermally synthesized using H3PO3 as an initial reagent. These compounds are Cs4[(UO2)8(HPO4)5(HPO3)5]·4H2O (1), Cs[UIV(PO4)(H1.5PO4)]2 (2), Cs4[UIV6(PO4)8(HPO4)(HPO3)] (3), Cs10[UIV10(PO4)4(HPO4)14(HPO3)5]·H2O (4), and Cs3[UIV4(PO4)3(HPO4)5] (5). The first contains uranium(VI) and the latter four uranium(IV). Of the UIV structures, two have extensive disordering among the cesium cation positions, one of which also contains disordering at some of the phosphate–phosphite positions. These intermediate compounds are bookended by nondisordered phases. The isolation of these transitional phases occurred at the higher of the pH conditions attempted here. Both the starting pH and the duration of the reactions have a strong influence on the products formed. Herein, we explore the second series of in situ hydrothermal redox reactions of uranyl nitrate with phosphorous acid and cesium carbonate. The isolation of these disorde...
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systematic evolution from uranyl vi Phosphites to uranium iv phosphates
ChemInform, 2012Co-Authors: Eric M. Villa, Connor J Marr, Evgeny V Alekseev, Wulf Depmeier, Laurent Jouffret, Thomas E AlbrechtschmittAbstract:In situ hydrothermal redox reactions of uranyl nitrate with phosphorous acid and alkali metal carbonates are explored and six new uranium Phosphites, phosphates, and phosphite/phosphate mixed compounds are synthesized hydrothermally and one uranyl phosphite is obtained at room temperature.
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systematic evolution from uranyl vi Phosphites to uranium iv phosphates
Inorganic Chemistry, 2012Co-Authors: Eric M. Villa, Connor J Marr, Evgeny V Alekseev, Wulf Depmeier, Laurent Jouffret, Thomas E AlbrechtschmittAbstract:Six new uranium Phosphites, phosphates, and mixed phosphate–phosphite compounds were hydrothermally synthesized, with an additional uranyl phosphite synthesized at room temperature. These compounds can contain UVI or UIV, and two are mixed-valent UVI/UIV compounds. There appears to be a strong correlation between the starting pH and reaction duration and the products that form. In general, Phosphites are more likely to form at shorter reaction times, while phosphates form at extended reaction times. Additionally, reduction of uranium from UVI to UIV happens much more readily at lower pH and can be slowed with an increase in the initial pH of the reaction mixture. Here we explore the in situ hydrothermal redox reactions of uranyl nitrate with phosphorous acid and alkali-metal carbonates. The resulting products reveal the evolution of compounds formed as these hydrothermal redox reactions proceed forward with time.
Alexey Shavel - One of the best experts on this subject based on the ideXlab platform.
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Triphenyl Phosphite as the Phosphorus Source for the Scalable and Cost-Effective Production of Transition Metal Phosphides
Chemistry of Materials, 2018Co-Authors: Junfeng Liu, Michaela Meyns, Ting Zhang, Jordi Arbiol, Andreu Cabot, Alexey ShavelAbstract:Transition metal phosphides have great potential to optimize a number of functionalities in several energy conversion and storage applications, particularly when nanostructured or in nanoparticle form. However, the synthesis of transition metal phosphide nanoparticles and its scalability is often limited by the toxicity, air sensitivity, and high cost of the reagents used. We present here a simple, scalable, and cost-effective “heating up” procedure to produce metal phosphides using inexpensive, low-toxicity, and air-stable triphenyl phosphite as source of phosphorus and chlorides as metal precursors. This procedure allows the synthesis of a variety of phosphide nanoparticles, including phosphides of Ni, Co, and Cu. The use of carbonyl metal precursors further allowed the synthesis of Fe2P and MoP nanoparticles. The fact that minor modifications in the experimental parameters allowed producing nanoparticles with different compositions and even to tune their size and shape shows the high potential and vers...
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Triphenyl Phosphite as the Phosphorus Source for the Scalable and Cost-Effective Production of Transition Metal Phosphides
2018Co-Authors: Junfeng Liu, Michaela Meyns, Ting Zhang, Jordi Arbiol, Andreu Cabot, Alexey ShavelAbstract:Transition metal phosphides have great potential to optimize a number of functionalities in several energy conversion and storage applications, particularly when nanostructured or in nanoparticle form. However, the synthesis of transition metal phosphide nanoparticles and its scalability is often limited by the toxicity, air sensitivity, and high cost of the reagents used. We present here a simple, scalable, and cost-effective “heating up” procedure to produce metal phosphides using inexpensive, low-toxicity, and air-stable triphenyl phosphite as source of phosphorus and chlorides as metal precursors. This procedure allows the synthesis of a variety of phosphide nanoparticles, including phosphides of Ni, Co, and Cu. The use of carbonyl metal precursors further allowed the synthesis of Fe2P and MoP nanoparticles. The fact that minor modifications in the experimental parameters allowed producing nanoparticles with different compositions and even to tune their size and shape shows the high potential and versatility of the triphenyl phosphite precursor and the presented method. We also detail here a methodology to displace organic ligands from the surface of phosphide nanoparticles, which is a key step toward their application in energy conversion and storage systems
Evgeny V Alekseev - One of the best experts on this subject based on the ideXlab platform.
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from order to disorder and back again in situ hydrothermal redox reactions of uranium Phosphites and phosphates
Inorganic Chemistry, 2013Co-Authors: Eric M. Villa, Connor J Marr, Juan Diwu, Evgeny V Alekseev, Wulf Depmeier, Thomas E AlbrechtschmittAbstract:Five new uranium Phosphites, phosphates, and mixed phosphate–phosphite compounds were hydrothermally synthesized using H3PO3 as an initial reagent. These compounds are Cs4[(UO2)8(HPO4)5(HPO3)5]·4H2O (1), Cs[UIV(PO4)(H1.5PO4)]2 (2), Cs4[UIV6(PO4)8(HPO4)(HPO3)] (3), Cs10[UIV10(PO4)4(HPO4)14(HPO3)5]·H2O (4), and Cs3[UIV4(PO4)3(HPO4)5] (5). The first contains uranium(VI) and the latter four uranium(IV). Of the UIV structures, two have extensive disordering among the cesium cation positions, one of which also contains disordering at some of the phosphate–phosphite positions. These intermediate compounds are bookended by nondisordered phases. The isolation of these transitional phases occurred at the higher of the pH conditions attempted here. Both the starting pH and the duration of the reactions have a strong influence on the products formed. Herein, we explore the second series of in situ hydrothermal redox reactions of uranyl nitrate with phosphorous acid and cesium carbonate. The isolation of these disorde...
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systematic evolution from uranyl vi Phosphites to uranium iv phosphates
ChemInform, 2012Co-Authors: Eric M. Villa, Connor J Marr, Evgeny V Alekseev, Wulf Depmeier, Laurent Jouffret, Thomas E AlbrechtschmittAbstract:In situ hydrothermal redox reactions of uranyl nitrate with phosphorous acid and alkali metal carbonates are explored and six new uranium Phosphites, phosphates, and phosphite/phosphate mixed compounds are synthesized hydrothermally and one uranyl phosphite is obtained at room temperature.
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systematic evolution from uranyl vi Phosphites to uranium iv phosphates
Inorganic Chemistry, 2012Co-Authors: Eric M. Villa, Connor J Marr, Evgeny V Alekseev, Wulf Depmeier, Laurent Jouffret, Thomas E AlbrechtschmittAbstract:Six new uranium Phosphites, phosphates, and mixed phosphate–phosphite compounds were hydrothermally synthesized, with an additional uranyl phosphite synthesized at room temperature. These compounds can contain UVI or UIV, and two are mixed-valent UVI/UIV compounds. There appears to be a strong correlation between the starting pH and reaction duration and the products that form. In general, Phosphites are more likely to form at shorter reaction times, while phosphates form at extended reaction times. Additionally, reduction of uranium from UVI to UIV happens much more readily at lower pH and can be slowed with an increase in the initial pH of the reaction mixture. Here we explore the in situ hydrothermal redox reactions of uranyl nitrate with phosphorous acid and alkali-metal carbonates. The resulting products reveal the evolution of compounds formed as these hydrothermal redox reactions proceed forward with time.
