pH-Dependent Assembly of Three POM-Based Host–Guest Compounds Constituted by Keggin Polyoxoanions and 4,4′-Bipyridines

Shi, Shanbin; Chen, Ling Y.; Zhao, Xun B.; Liu, Ying; Zhang, Jun; Ren, Bai Xiang; Cui, Xiao

doi:10.1007/s10876-018-1475-2

Cited by 3 publications

(2 citation statements)

References 53 publications

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“…Besides, the electron binding energy of Cu II 2p can also be seen in the XPS of compound 2 , which is probably due to that a small amount of Cu I on the crystal surface was oxidized. Furthermore, the W 4f spectra of both compounds can be divided into two peaks (Figures S15b and S16b), at about 35.46, 37.58 eV for compound 1 and at about 35.48, 37.67 eV for compound 2 , corresponding to W 4f 7/2 and W 4f 5/2 , respectively . The B 1s spectra (Figures S15a and S16a) give a peak of 191.08 eV for compound 1 and 191.17 eV for compound 2 , demonstrating the presence of B 3+ .…”

Section: Resultsmentioning

confidence: 93%

“…Furthermore, the W 4f spectra of both compounds can be divided into two peaks (Figures S15b and S16b), at about 35.46, 37.58 eV for compound 1 and at about 35.48, 37.67 eV for compound 2, corresponding to W 4f 7/2 and W 4f 5/2 , respectively. 73 The B 1s spectra (Figures S15a and S16a) give a peak of 191.08 eV for compound 1 and 191.17 eV for compound 2, demonstrating the presence of B 3+ . 74 The O 1s peaks of compound 1 located at 532.96 and 530.44 eV (Figure S15e) are characteristic for C−O and CO, respectively, and the O 1s peak for compound 2 is located at about 530.61 eV (Figure S16e).…”

Section: ■ Results and Discussionmentioning

confidence: 96%

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{BW₁₂O₄₀} Hybrids Modified by in Situ Synthesized Rigid Ligand with Supercapacitance and Photocatalytic Properties

Zhang

Gong

et al. 2021

Inorg. Chem.

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Organic rigid ligand-modified polyoxometalate-based materials possess complex and diverse structures, promising electrochemical energy storage properties and outstanding photocatalytic capabilities. Hence, two new [BW 12 O 40 ] 5− (abbreviated as {BW 12 O 40 })-based inorganic-organic hybrids [{Cu(en) 2 (H 2 O)}][{Cu(pdc)(en)}{Cu(en) 2 }(BW 12 O 40 )]•2H 2 O (1) and [{Cu I 5 (pz) 6 (H 2 O) 4 }(BW 12 O 40 )](2) (pdc = 2-picolinate, en = ethylenediamine, pz = pyrazine) were successfully synthesized through a hydrothermal method. Among them, pdc and pz were obtained by in situ transformation from 2,6-pyridinedicarboxylic acid (H 2 pydc) and 2,3-pyrazinedicarboxylic acid (H 2 pzdc), respectively. In compound 1, the {BW 12 O 40 } clusters as an intermediate junction connect with {Cu(pdc)(en)}{Cu(en) 2 } and {Cu(en) 2 (H 2 O)} to form monomers, which in turn form supramolecular chains, sheets, and space network via hydrogen bonding. The {BW 12 O 40 } clusters are packed into copper-pyrazine frameworks in compound 2, and a unique polyoxometalate-based metal organic frameworks (POMOFs) structure with a new topology of {12} 2 {6.12 3 .14 2 } 2 {6 2 .12.14 2 .18}{6 2 .12 3 .16}{6} 6 is formed via covalent bonds. When used as electrode materials for supercapacitors, the values of specific capacitance are 651.56 F g −1 for 1-GCE and 584.43 F g −1 for 2-GCE at a current density of 2.16 A g −1 and good cycling stability (90.94%, 94.81% of the initial capacity after 5000 cycles at 15.12 A g −1 , respectively). The kinetic analysis reveals that surface capacitance plays a major role. Furthermore, both compounds can effectively degrade Rhodamine B (RhB) and Methylene blue (MB), showing the outstanding photocatalytic performance.

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Section: Resultsmentioning

confidence: 93%

Section: ■ Results and Discussionmentioning

confidence: 96%

{BW₁₂O₄₀} Hybrids Modified by in Situ Synthesized Rigid Ligand with Supercapacitance and Photocatalytic Properties

Zhang

Gong

et al. 2021

Inorg. Chem.

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Hydrothermal synthesis, characterization and catalytic activities of a Keggin structure of (4,4′-bpyH2)3[PW12O40]2·3H2O and a Wells-Dawson structure of (4,4′-bpyH2)3(4,4′-bpyH)1.75[Cu(bpy)2]0.25[H2P2W18O62]2

Ece,

Chilufya,

McMillen

et al. 2025

Journal of Molecular Structure

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Synthesis of Micro- and Nanoparticles in Sub- and Supercritical Water: From the Laboratory to Larger Scales

et al. 2020

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The use of micro- and nanoparticles is gaining more and more importance because of their wide range of uses and benefits based on their unique mechanical, physical, electrical, optical, electronic, and magnetic properties. In recent decades, supercritical fluid technologies have strongly emerged as an effective alternative to other numerous particle generation processes, mainly thanks to the peculiar properties exhibited by supercritical fluids. Carbon dioxide and water have so far been two of the most commonly used fluids for particle generation, the former being the fluid par excellence in this field, mainly, because it offers the possibility of precipitating thermolabile particles. Nevertheless, the use of high-pressure and -temperature water opens an innovative and very interesting field of study, especially with regards to the precipitation of particles that could hardly be precipitated when CO2 is used, such as metal particles with a considerable value in the market. This review describes an innovative method to obtain micro- and nanoparticles: hydrothermal synthesis by means of near and supercritical water. It also describes the differences between this method and other conventional procedures, the most currently active research centers, the types of particles synthesized, the techniques to evaluate the products obtained, the main operating parameters, the types of reactors, and amongst them, the most significant and the most frequently used, the scaling-up studies under progress, and the milestones to be reached in the coming years.

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pH-Dependent Assembly of Three POM-Based Host–Guest Compounds Constituted by Keggin Polyoxoanions and 4,4′-Bipyridines

Cited by 3 publications

References 53 publications

{BW₁₂O₄₀} Hybrids Modified by in Situ Synthesized Rigid Ligand with Supercapacitance and Photocatalytic Properties

{BW₁₂O₄₀} Hybrids Modified by in Situ Synthesized Rigid Ligand with Supercapacitance and Photocatalytic Properties

Hydrothermal synthesis, characterization and catalytic activities of a Keggin structure of (4,4′-bpyH2)3[PW12O40]2·3H2O and a Wells-Dawson structure of (4,4′-bpyH2)3(4,4′-bpyH)1.75[Cu(bpy)2]0.25[H2P2W18O62]2

Synthesis of Micro- and Nanoparticles in Sub- and Supercritical Water: From the Laboratory to Larger Scales

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pH-Dependent Assembly of Three POM-Based Host–Guest Compounds Constituted by Keggin Polyoxoanions and 4,4′-Bipyridines

Cited by 3 publications

References 53 publications

{BW12O40} Hybrids Modified by in Situ Synthesized Rigid Ligand with Supercapacitance and Photocatalytic Properties

{BW12O40} Hybrids Modified by in Situ Synthesized Rigid Ligand with Supercapacitance and Photocatalytic Properties

Hydrothermal synthesis, characterization and catalytic activities of a Keggin structure of (4,4′-bpyH2)3[PW12O40]2·3H2O and a Wells-Dawson structure of (4,4′-bpyH2)3(4,4′-bpyH)1.75[Cu(bpy)2]0.25[H2P2W18O62]2

Synthesis of Micro- and Nanoparticles in Sub- and Supercritical Water: From the Laboratory to Larger Scales

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{BW₁₂O₄₀} Hybrids Modified by in Situ Synthesized Rigid Ligand with Supercapacitance and Photocatalytic Properties

{BW₁₂O₄₀} Hybrids Modified by in Situ Synthesized Rigid Ligand with Supercapacitance and Photocatalytic Properties