Zeolite Ionic Crystals Assembled through Direct Incorporation of Polyoxometalate Clusters within 3D Metal−Organic Frameworks

Wei, Mei-Lin; He, Cheng; Sun, Qiaozhen; Meng, Qing-Jin; Duan, Chunying

doi:10.1021/ic070274o

Cited by 104 publications

(37 citation statements)

References 52 publications

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“…More recently, it was reported that based on REDOR experiments acidic protons are localized on both bridging (O c ) and terminal (O d ) oxygen atoms of the Keggin unit in the anhydrous state of H 3 PW 12 O 40 [37]. In title complexes, there are 2.5 or 2 lattice water molecules and the separations between them are enough short to stabilize the excess proton to form some oligomer, so, we think that the excess proton is not localized on the surface of the polyanion [6][7][8]27].…”

Section: Structure Descriptionmentioning

confidence: 88%

“…These eight oxygen atoms are all crystallographically disordered, and this case can be found in many compounds [6][7][8]27]. The poly-Keggin-type anions play not only a chargecompensating role, but they can dramatically influence the overall solid-state architecture through their templating function, as well as the cationic framework with special channels also influences the polymerization of polyanions through its host function.…”

Section: Structure Descriptionmentioning

confidence: 99%

“…From their first synthesis, many advances have been made to promote the use of HPCs in different ways in science and technology [1][2][3][4][5][6][7][8]. Keggin-type heteropolyacids (HPAs), possessing a unique discrete ionic structure including heteropoly anions and countercations (H ?…”

Section: Introductionmentioning

confidence: 99%

“…(H 2 O) 2.5 (the proton added to balance the charge)(Fig. 1b)[6][7][8]27], the O(7W) with the occupancy of 50% is placed in a symmetry center and located in a tetragonal environment built from two water molecules(O(5W) and O(6W) centers), which are crystallographically disordered into two symmetrical positions with each oxygen site half-occupied, respectively.…”

mentioning

confidence: 99%

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Two Molecular Hybrids Based on Typical or Decorated Poly-Keggin-Anion Chains: Syntheses, Structures, and Proton-Conductivities

Wei

Wang

2011

J Clust Sci

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Two proton-conductive molecular hybrids were constructed by introducing protonated water clusters, alkaline-earth metal ions and [PMo 12 O 40 ] 3-anions in the gallery of H-bonding networks based on isonicotinic acid N-oxide. Single-crystal X-ray diffraction analyses at 293 K revealed that two complexes crystallized in the orthorhombic space group Pnnm, exhibited very close unit cell parameters, and presented similar three-dimensional hydrogen-bonded networks with large one-dimensional (1D) channels. Interestingly, typical or decorated polyKeggin-anion chains are formed in the 1D channels. Surprisingly, the proton conductivities of two complexes in the temperature range of 85-100°C under 98% RH conditions reached good proton conductivities of 10 -3 S cm -1 . A possible mechanism of the proton conduction was proposed according to the experimental results.

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Section: Structure Descriptionmentioning

confidence: 88%

Section: Structure Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Two Molecular Hybrids Based on Typical or Decorated Poly-Keggin-Anion Chains: Syntheses, Structures, and Proton-Conductivities

Wei

Wang

2011

J Clust Sci

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“…In title complex, there are three lattice water molecules and the separations between them are enough short to stabilize the excess proton to form such an oligomer as H 7 O 3 ? , so, we think that the excess proton is not localized on the surface of the polyanion [28][29][30][31][32][33].…”

Section: Measured Reflections 26764mentioning

confidence: 93%

A supramolecular complex based on poly-Keggin-anion chains: synthesis, structure characterization, and conductivity

Wei

Wang

et al. 2011

Struct Chem

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A proton-conductive supramolecular complex, {[Cu(H 2 O) 8 ][H(H 2 O) 3 ](HINO) 4 (PMo 12 O 40 )} n , was constructed by a self-assembly of H ? (H 2 O) 3 clusters, [Cu(H 2 O) 8 ] 2? clusters, [PMo 12 O 40 ] 3-anions, and isonicotinic acid N-oxide (HINO). Single-crystal X-ray diffraction analysis at 293 K revealed that the complex presented the three-dimensional (3D) supramolecular framework built from non-covalent interactions. Interestingly, [PMo 12 O 40 ] 3-anions self-assembled into polyKeggin-anion chains in the supramolecular framework. Thermogravimetric analysis shows no weight loss in the temperature range of 20-100°C, indicating that all water molecules in the unit structure are not easily lost below 100°C. Surprisingly, the proton conductivity of the complex in the temperature range of 85-100°C under 98% RH condition reached good proton conductivity of 10 -3 S cm -1 . A possible mechanism of the proton conduction was proposed according to the experimental results.

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Synthesis of Pyrazolo‐[4́,3́:5,6]pyrido[2,3‐d]pyrimidine‐diones Catalyzed by a Nano‐sized Surface‐Grafted Neodymium Complex of the Tungstosilicate via Multicomponent Reaction

Daraie

Heravi

Mirzaei

et al. 2019

Applied Organom Chemis

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An inorganic–organic hybrid based on lanthanide clusters and Keggin type polyoxometalates (POMs) (Na[Nd (pydc‐OH)(H2O)4]3}[SiW12O40]) was used the first time as trinuclear catalyst for one pot synthesis of pyrazolo[4́́,3́:5,6]pyrido[2,3‐d]pyrimidine‐diones, via two different four and five‐component reactions involving hydrazine hydrate, ethyl acetoacetate, aryl aldehydes, and 6‐amino‐1,3‐dimethyl uracil or barbituric acid with ammonium acetate as alternative materials in green condition. To evaluate potential application of the as‐made hybrid in adsorption and separation processes, nitrogen adsorption was performed at 77 K through simulation study. The hybrid catalyst was further characterized via powder X‐ray diffraction (PXRD) at room temperature which indicated the good phase purity of the catalyst. The results show that the catalytic activity of the hybrid catalyst has increased relative to each parent component due to the special interaction between Keggin anions and pydc‐OH ligands.

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Zeolite Ionic Crystals Assembled through Direct Incorporation of Polyoxometalate Clusters within 3D Metal−Organic Frameworks

Cited by 104 publications

References 52 publications

Two Molecular Hybrids Based on Typical or Decorated Poly-Keggin-Anion Chains: Syntheses, Structures, and Proton-Conductivities

Two Molecular Hybrids Based on Typical or Decorated Poly-Keggin-Anion Chains: Syntheses, Structures, and Proton-Conductivities

A supramolecular complex based on poly-Keggin-anion chains: synthesis, structure characterization, and conductivity

Synthesis of Pyrazolo‐[4́,3́:5,6]pyrido[2,3‐d]pyrimidine‐diones Catalyzed by a Nano‐sized Surface‐Grafted Neodymium Complex of the Tungstosilicate via Multicomponent Reaction

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