scholarly journals Atomically Precise Lanthanide‐Iron‐Oxo Clusters Featuring the ϵ‐Keggin Ion

2020 ◽  
Vol 26 (6) ◽  
pp. 1388-1395 ◽  
Author(s):  
Xiu‐Ying Zheng ◽  
Ming‐Hao Du ◽  
Mehran Amiri ◽  
May Nyman ◽  
Qiang Liu ◽  
...  
Keyword(s):  
Keggin Ion

[e-PMo12O36(OH)4{La(H2O)4}4]5+: The First e-PMo12O40 Keggin Ion and Its Association with the Two-Electron-Reduced α-PMo12O40 Isomer

2002 ◽  
Vol 41 (13) ◽  
pp. 2398 ◽  
Author(s):  
Pierre Mialane ◽  
Anne Dolbecq ◽  
Laurent Lisnard ◽  
Alain Mallard ◽  
Jérôme Marrot ◽  
...  
Keyword(s):  
Keggin Ion

How does the Support Influence the Catalytic Activity of the Keggin Ion?

1996 ◽  
Vol 454 ◽  
Author(s):  
Zakiyyah Smith ◽  
Michael Palmieri ◽  
Nancy Buecheler ◽  
Susan A. Jansen
Keyword(s):  
Catalytic Activity ◽  
Carbon Materials ◽  
Solid Acid ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Heteropoly Acids ◽  
Keggin Ion ◽  
Oxide Substrates ◽  
Silica Matrices

AbstractHeteropoly acids, HPA are well known solid acid and oxidation catalysts that find application in hetergeneous and homogeneous reactions. In the former, surface area and stability problems are diminshed by supporting the HPA. Typical supports include oxide substrates and porous carbon materials. The HPA's show some instability on these supports however. In this work, we demonstrate that HPA encapsulated in sol-gel silica matrices show enhanced catalytic performance without compromising the catalytic activity of the HPA. In addition, the specific role of the support in the catalytic process is described as well.

scholarly journals Alkyltin clusters: the less symmetric Keggin isomers

2018 ◽  
Vol 47 (29) ◽  
pp. 9804-9813 ◽  
Author(s):  
Danielle C. Hutchison ◽  
Rebecca D. Stern ◽  
Morgan R. Olsen ◽  
Lev N. Zakharov ◽  
Kristin A. Persson ◽  
...  
Keyword(s):  
Keggin Ion

Sn4+ forms the only Keggin ion family that favors the lowest symmetry β and γ isomers.

Interaction between dopamine and the [HPW12O40]2−Keggin ion–an X-ray and NMR study

2021 ◽  
Vol 1226 ◽  
pp. 129343
Author(s):  
Fredric G. Svensson ◽  
Vadim G. Kessler
Keyword(s):  
X Ray ◽  
Keggin Ion ◽  
Nmr Study

Activation of Oxidation Catalysts by Solvation

1996 ◽  
Vol 454 ◽  
Author(s):  
Annette D. Eddowes ◽  
Dana Stallings ◽  
Caprice L. Hightower ◽  
Susan A. Jansen
Keyword(s):  
Photochemical Reactions ◽  
Oxidation Reactions ◽  
Mechanistic Studies ◽  
Oxidation Catalysts ◽  
Keggin Ion ◽  
Solution State ◽  
Keggin Type ◽  
Activation Of Oxidation

AbstractThe versatility of heteropolyanions implies many different uses for Keggin type catalysts. However, new roles for these catalysts must first be preceeded by further understanding of the mechanisms by which they operate. It has been observed that the solvation and/or complexation of heteropolyanions promotes or limits activity in homogeneous chemistry. For this reason the solution state and the solvation characteristics of the catalyst were studied in oxidation and photochemical reactions. Simple oxidation reactions provide a system by which the solution state of the catalyst can be studied. The catalyst used for these mechanistic studies is the Keggin ion (PMo10V2O40)−5.

Preparation and photocatalytic activity of Keggin-ion tungstate and TiO2 hybrid layer-by-layer film composites

2009 ◽  
Vol 366 (1) ◽  
pp. 148-153 ◽  
Author(s):  
Sayaka Yanagida ◽  
Akira Nakajima ◽  
Takayoshi Sasaki ◽  
Toshihiro Isobe ◽  
Yoshikazu Kameshima ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Layer By Layer ◽  
Hybrid Layer ◽  
Layer Film ◽  
Keggin Ion ◽  
Film Composites

ChemInform Abstract: [ε-PMo12O36(OH)4{La (H2O)4}4]5+: The First ε-PMo12O40 Keggin Ion and Its Association with the Two-Electron-Reduced α-PMo12O40 Isomer.

ChemInform ◽  
2010 ◽  
Vol 33 (38) ◽  
pp. no-no
Author(s):  
Pierre Mialane ◽  
Anne Dolbecq ◽  
Laurent Lisnard ◽  
Alain Mallard ◽  
Jerome Marrot ◽  
...  
Keyword(s):  
Keggin Ion
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