Enhancing Proton Conduction in 2D Co–La Coordination Frameworks by Solid-State Phase Transition

Bao, Song‐Song; Otsubo, Kenji; Taylor, Jared M.; Jiang, Zheng; Zheng, Li‐Min; Kitagawa, Hiroshi

doi:10.1021/ja505916c

Cited by 142 publications

(88 citation statements)

References 32 publications

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“…During the last several decades, the field of metal phosphonates has received increasing attention owing to their potential applications in catalysis [1,2], proton conductivity [3][4][5], gas absorption and separation [6][7][8], magnetism [8][9][10][11], and optics [12]. The crystal chemistry of actinide phosphonates is an important subfield of metal phosphonates, where major attention was paid to uranium [13][14][15][16][17][18][19] and thorium [20][21][22], with only a few neptunium [22][23][24], plutonium [25][26][27][28], and americium [28] complexes.…”

Section: Introductionmentioning

confidence: 99%

“…A dimer of U1 and U2 is obtained by edge-sharing µ 3 -O3 and µ 3 -O11. The uranium dimers are bridged by the CPO3 groups to extend along the a axis to give a chain, which are further connected by the organic moiety of pmb ligand to form the layered topology. The charge of the anionic layer is compensated with 1-butyl-2,3-dimethylimidazolium cations filled in the space.…”

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confidence: 99%

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Structural and spectroscopic characterization of two new layered uranyl(VI) p-xylenediphosphonate compounds synthesized via ionothermal method

Zheng

Gao

Chen

et al. 2015

Inorganica Chimica Acta

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∆ These authors contributed equally to this work ABSTRACT.2 Two new uranyl phosphonates were synthesized by using p-xylenediphosphonic acid (pmbH 4 ) to react with uranyl salts in Emim or BMMim ([EMim][PF 6 ]=1-ethyl-3-methylimidazolium hexafluorophosphate;[BMMim]Cl=1-butyl-2,3-dimethylimidazolium chloride) at elevated temperature, namely [EMim][UO 2 (pmbH 2 ) 0.5 (pmbH 2 ) 0.5 (ox) 0.5 ] (1) and[BMMim] 2 [(UO 2 ) 2 (pmbH 2 )(pmb)] (2). Both compounds adopt two dimensional structures, consisting of an anionic layer of uranyl phosphonate, with cations filled in the interlayer spaces.The spectroscopic properties of the compounds were studied extensively using UV-Vis absorption, temperature dependent fluorescence, Raman and IR spectroscopies. The UV-Vis absorption spectrum contains typical peaks of uranyl complexes at around 320 nm and 420 nm, which are originated from the charge transfer transitions from O 2p orbitals to the U 5f/6d orbitals. Both compounds adopt five strong emission peaks, whose intensities increase with the decrease of temperature, as observed in the temperature dependent fluorescence spectra. In Raman and IR spectra, the peaks corresponding to the stretch of C-H/O-H, P-O/P=O, and O•U•O bonds could all be located and assigned.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Structural and spectroscopic characterization of two new layered uranyl(VI) p-xylenediphosphonate compounds synthesized via ionothermal method

Zheng

Gao

Chen

et al. 2015

Inorganica Chimica Acta

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“…have recently developed a triazolyl phosphonate based MOF with hydrophilic nanochannels, which are highly demanding as a proton conducting membrane . Interestingly, 3d–4f transition‐metal‐containing phosphonate‐based MOFs undergo solid‐state phase transitions by release of protons from intralayer to interlayer at low temperatures under humid conditions. Shimidzu et al.…”

Section: Introductionmentioning

confidence: 99%

“…Begum et al have recently developed at riazolyl phosphonate based MOF with hy-drophilicn anochannels,w hich are highly demanding as ap roton conducting membrane. [25] Interestingly,3 d-4ft ransition-metal-containing phosphonate-based MOFs [26] undergo solid-state phase transitions by release of protons from intralayer to interlayer at low temperatures under humid conditions. Shimidzu et al have developedaZ n-phosphonatebased MOF bearing al ayered motif, which showed high protonc onduction owing to the presence of water molecules in the ordered chains.…”

Section: Introductionmentioning

confidence: 99%

Organic–Inorganic Hybrid Metal Phosphonates as Recyclable Heterogeneous Catalysts

Bhanja

Bhaumik

2016

ChemCatChem

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Successful incorporation of a suitable organic moiety in a porous inorganic metal phosphate network can not only make the corresponding organic–inorganic framework more flexible and robust, but it introduces more hydrophobicity at the surface of the resulting nanostructured material, which is highly desirable for their catalytic application in liquid‐phase chemical transformations. Following the success of organic–inorganic hybrid mesoporous silicas, a wide range of analogous hybrid metal phosphonates have been designed. This has opened up a wide diversity of open framework porous nanomaterials, which show excellent catalytic activities in many organic transformations that are not possible with their corresponding inorganic counterparts. Here, we have summarized the recent developments in designing organic–inorganic hybrid porous metal phosphonates in this brief review with a special emphasis on their catalytic potential in liquid‐phase organic transformations.

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“…In recent years, we have focused on metal phosphonates with interesting magnetic, [11] optical, [12] and proton conductivity [13] properties. A number of cobalt phosphonates have been assembled that display metamagnetism, [14] weak ferromagnetism, [15] ferrimagnetism, [16] and tunable magnetic behaviors.…”

Section: Introductionmentioning

confidence: 99%

Homochiral Cobalt Phosphonates Containing Δ‐Type Chains with a Tunable Interlayer Distance and a Field‐Induced Phase Transition

Cai

Bao

Ren

et al. 2014

Chemistry A European J

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Two pairs of enantiomeric Co(II) compounds with formulas [Co2 (μ3 -OH)(cyamp)(Cn H2n+1 COO)] (cyampH2 =(S)- or (R)-[(1-cyclohexylethyl)amino]methylphosphonic acid; n=1 (1); n=7 (2)) were synthesized. The structures of S-1 and S-2 were determined by single-crystal structural analyses. Both crystallize in a monoclinic chiral space group P21 , and exhibit layered structures in which the Δ-type chains of corner-sharing Co3 (μ3 -OH) triangles are connected by the phosphonate groups. The interlayer spaces are filled with the organic groups of the phosphonate and carboxylate ligands. Therefore, the distances between the layers can be manipulated by the length of the alkyl chain of the carboxylate ligands, from 14.6 Å in 1 to 20.0 Å in 2. Magnetic studies were carried out for compounds S-1 and S-2. Both show metamagnetism at low temperature. The critical field decreases with increasing interlayer distance from 8.18 kOe for S-1 to 7.01 kOe for S-2 at 1.8 K. The optical properties were also studied.

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Enhancing Proton Conduction in 2D Co–La Coordination Frameworks by Solid-State Phase Transition

Cited by 142 publications

References 32 publications

Structural and spectroscopic characterization of two new layered uranyl(VI) p-xylenediphosphonate compounds synthesized via ionothermal method

Structural and spectroscopic characterization of two new layered uranyl(VI) p-xylenediphosphonate compounds synthesized via ionothermal method

Organic–Inorganic Hybrid Metal Phosphonates as Recyclable Heterogeneous Catalysts

Homochiral Cobalt Phosphonates Containing Δ‐Type Chains with a Tunable Interlayer Distance and a Field‐Induced Phase Transition

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