Hydrothermal synthesis, crystal structure, thermal behavior and spectroscopic and magnetic properties of two new organically templated fluoro-vanadyl-hydrogenarsenates: (R)0.5[(VO)(HAsO4)F] (R: Ethylenediammonium and piperazinium)

Berrocal, Teresa; Mesa, José L.; Pizarro, José L.; Lezama, Luís; Bazán, Begoña; Arriortua, Marı́a I.; Rojo, Teófilo

doi:10.1016/j.jssc.2008.01.037

Cited by 18 publications

(12 citation statements)

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“…According to the results of our literature research, some open structures organically templated vanadyl arsenate have been reported, which exhibit 1D, 2D or 3D structures. [25][26][27][28] The butanediammonium, (H 2 NC 4 H 8 NH 2 )[(VO) 2 (HAsO 4 ) 2 -(H 2 AsO 4 ) 2 ] phase contains -V=O-V=O-chains. 25 The two ethylene-diammonium, (H 3 C 2 H 4 NH 3 )[(VO)(As 2 O 7 )(H 2 O)] and (H 3 C 2 H 4 NH 3 ) 0.5 [(VO)(AsO 4 ) (H 2 O)], compounds exhibit isolated chains.…”

Section: Introductionmentioning

confidence: 99%

“…The (R) 0.5 [(VO)(HAsO 4 )F] (R = ethylenediammonium and piperazinium) phases show a layered structure. 27 The (C 5 H 14 N 2 )-[(VO) 3 (AsO 4 )(HAsO 4 ) 2 (OH)]•2H 2 O compound exhibits a three-dimensional structure with pores of approximately 14 A ˚.28 Similarly, some vanadyl phosphates templated with diamines have been synthesized 30 The four two-dimensional vanadyl phosphates with the formula, (…”

Section: Introductionmentioning

confidence: 99%

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Catalytic performance of the high and low temperature polymorphs of (C₆N₂H₁₆)_0.5[(VO)(HAsO₄)F]: structural, thermal, spectroscopic and magnetic studies

et al. 2010

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(C(6)N(2)H(16))(0.5)[(VO)(HAsO(4))F] 1 has been synthesized using mild hydrothermal conditions under autogenous pressure. Above 70 degrees C, this phase has a polymorph with the same chemical composition 2 in which the organic 1,4-diamincyclohexane molecule adopts a different conformation. The crystal structures have been solved from single-crystal X-ray diffraction data. The phases crystallize in the C2/c monoclinic space group with the unit-cell parameters a = 21.065(2) A b = 7.2717(4) A c = 10.396(1) A beta = 104.290(8) degrees for compound 1 and a = 23.025(1) A, b = 7.322(1) A, c = 10.344(1) A and beta = 109.250(6) degrees for compound 2. These phases exhibit a layered inorganic framework, with the template molecule linking the layers via electrostatic interaction and hydrogen bonds. In both phases, the structure is built from secondary building units SBU-4, which are constructed from two [V(2)O(8)F(2)] edge-shared dimeric vanadyl octahedra, connected by the vertices of two hydrogenarsenate (HAsO(4)) tetrahedra. The repetition of this SBU unit gives sheets along the [010] direction. Polymorph 1 exists below 70 degrees C, whereas the limit of thermal stability for 2 is approximately 150 degrees C. Both phases coexist in the temperature range from 80 to -15 degrees C. By means of the DSC technique it has been possible to verify that the temperature of the structural transition is between 70 and 100 degrees C. The diffuse reflectance spectrum of 1 confirms the presence of vanadyl ions, in which the vanadium(IV) cations have a d(1) electronic configuration in a slightly distorted octahedral environment. ESR spectra of both phases are isotropic with mean g values of 1.96 and 1.99 for 1 and 2, respectively. Magnetic measurements for 1 indicate the existence of antiferromagnetic exchange couplings. Both phases are effective and selective catalysts in the oxidation of organic sulfides to sulfoxides and 3,7-dimethylocta-1,6-dien-3-ol.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Catalytic performance of the high and low temperature polymorphs of (C₆N₂H₁₆)_0.5[(VO)(HAsO₄)F]: structural, thermal, spectroscopic and magnetic studies

et al. 2010

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“…In the reaction, the stronger phosphorous acid was able to transfer its acidic protons to piperazine to protonate both nitrogen atoms and create the piperazinium dication. This dication has been observed in different organic and inorganic structures [47][48][49][50][51][52] and has been previously used as an organic templating agent [53]. In the structure of (1), the nitrogen protons (H1A and H1B) on the piperazinium both showed strong hydrogen bonding to O(2) on the phosphite anion at ~1.89 Å each.…”

Section: Methodsmentioning

confidence: 79%

New Uranyl Open Framework and Sheet Compounds Formed via In-Situ Protonation of Piperazine by Phosphorous Acid

2018

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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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“…The design and synthesis of organic-inorganic hybrid perovskite materials have aroused great interest due to their unusual topological properties and potential applications in the fields of catalysis, biochemistry, magnetism, material science, and so on [3]. It was reported mostly that organic amine was used as organic component and inorganic divalent metal chlorides used as inorganic component [4].…”

Section: Introductionmentioning

confidence: 99%

Thermochemistry of the solid-state coordination compounds (C2H10N2)MCl4(s) (M=Cd and Cu)

et al. 2010

The Journal of Chemical Thermodynamics

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Hydrothermal synthesis, crystal structure, thermal behavior and spectroscopic and magnetic properties of two new organically templated fluoro-vanadyl-hydrogenarsenates: (R)0.5[(VO)(HAsO4)F] (R: Ethylenediammonium and piperazinium)

Cited by 18 publications

References 29 publications

Catalytic performance of the high and low temperature polymorphs of (C₆N₂H₁₆)_0.5[(VO)(HAsO₄)F]: structural, thermal, spectroscopic and magnetic studies

Catalytic performance of the high and low temperature polymorphs of (C₆N₂H₁₆)_0.5[(VO)(HAsO₄)F]: structural, thermal, spectroscopic and magnetic studies

New Uranyl Open Framework and Sheet Compounds Formed via In-Situ Protonation of Piperazine by Phosphorous Acid

Thermochemistry of the solid-state coordination compounds (C2H10N2)MCl4(s) (M=Cd and Cu)

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Hydrothermal synthesis, crystal structure, thermal behavior and spectroscopic and magnetic properties of two new organically templated fluoro-vanadyl-hydrogenarsenates: (R)0.5[(VO)(HAsO4)F] (R: Ethylenediammonium and piperazinium)

Cited by 18 publications

References 29 publications

Catalytic performance of the high and low temperature polymorphs of (C6N2H16)0.5[(VO)(HAsO4)F]: structural, thermal, spectroscopic and magnetic studies

Catalytic performance of the high and low temperature polymorphs of (C6N2H16)0.5[(VO)(HAsO4)F]: structural, thermal, spectroscopic and magnetic studies

New Uranyl Open Framework and Sheet Compounds Formed via In-Situ Protonation of Piperazine by Phosphorous Acid

Thermochemistry of the solid-state coordination compounds (C2H10N2)MCl4(s) (M=Cd and Cu)

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Catalytic performance of the high and low temperature polymorphs of (C₆N₂H₁₆)_0.5[(VO)(HAsO₄)F]: structural, thermal, spectroscopic and magnetic studies

Catalytic performance of the high and low temperature polymorphs of (C₆N₂H₁₆)_0.5[(VO)(HAsO₄)F]: structural, thermal, spectroscopic and magnetic studies