scholarly journals Structure‐Directing Roles of Organic Molecules in the Formation of Aluminosilicate and Aluminophosphate Molecular Sieves Revealed by 2D 1 H DQ‐SQ NMR Spectroscopy

2020 ◽  
Author(s):  
Fangyan Liu ◽  
Biao Wang ◽  
Xiaolong Liu
Keyword(s):  
Nmr Spectroscopy ◽  
Molecular Sieves ◽  
Organic Molecules ◽  
Aluminophosphate Molecular Sieves

Preparation and Characterization of Ni-Containing Aluminophosphate Molecular Sieves

2011 ◽  
Vol 418-420 ◽  
pp. 617-620
Author(s):  
Ying Sun ◽  
Lan Ying Ge
Keyword(s):  
Oxidation State ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Crystalline Form ◽  
Spectroscopic Techniques ◽  
Tetrahedral Coordination ◽  
Tetrahedral Geometry ◽  
Nickel Ions ◽  
Aluminophosphate Molecular Sieves

Aluminophosphate molecular sieve and Ni(II)-containing APO-5 materials were synthesized hydrothermally and characterized by various analytical and spectroscopic techniques. It indicates that the nickel ions with a divalent oxidation state can incorporate into the tetrahedral coordination in mesoporous aluminophosphate very well. The better crystallizing temperature is explored. A stronger crystalline form is obtained with the addition of HF. Further, microporous aluminophosphate molecular sieves and Ni(II) ions remain in a tetrahedral geometry even after calcination at 550 °C.

ChemInform Abstract: Aluminophosphate Molecular Sieves Comprised of Hydrated Triple Crankshaft Chains.

ChemInform ◽  
2010 ◽  
Vol 24 (24) ◽  
pp. no-no
Author(s):  
H.-X. LI ◽  
M. E. DAVIS ◽  
J. B. HIGGINS ◽  
R. M. DESSAU
Keyword(s):  
Molecular Sieves ◽  
Aluminophosphate Molecular Sieves

Catalytic dehydration of methanol to dimethyl ether over aluminophosphate and silico-aluminophosphate molecular sieves

2011 ◽  
Vol 12 (6) ◽  
pp. 535-538 ◽  
Author(s):  
Weili Dai ◽  
Wenbo Kong ◽  
Guangjun Wu ◽  
Niu Li ◽  
Landong Li ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Molecular Sieves ◽  
Aluminophosphate Molecular Sieves

Use of aluminophosphate molecular sieves in CO hydrogenation

1998 ◽  
Vol 167 (2) ◽  
pp. 183-193 ◽  
Author(s):  
M.Luisa Cubeiro ◽  
Carmen M López ◽  
Alicia Colmenares ◽  
Luisa Teixeira ◽  
Mireya R Goldwasser ◽  
...  
Keyword(s):  
Molecular Sieves ◽  
Co Hydrogenation ◽  
Aluminophosphate Molecular Sieves

Two Aluminophosphate Molecular Sieves Built from Pairs of Enantiomeric Structural Building Units

2018 ◽  
Vol 57 (14) ◽  
pp. 3727-3732 ◽  
Author(s):  
Seungwan Seo ◽  
Taimin Yang ◽  
Jiho Shin ◽  
Donghui Jo ◽  
Xiaodong Zou ◽  
...  
Keyword(s):  
Molecular Sieves ◽  
Aluminophosphate Molecular Sieves

Cobalt-substituted aluminophosphate molecular sieves: x-ray absorption, infrared spectroscopic, and catalytic studies

1992 ◽  
Vol 4 (6) ◽  
pp. 1373-1380 ◽  
Author(s):  
Jiesheng Chen ◽  
Gopinathan Sankar ◽  
John Meurig Thomas ◽  
Ruren Xu ◽  
G. Neville Greaves ◽  
...  
Keyword(s):  
Molecular Sieves ◽  
X Ray ◽  
Aluminophosphate Molecular Sieves ◽  
Infrared Spectroscopic ◽  
X Ray Absorption

scholarly journals Hoveyda–Grubbs type metathesis catalyst immobilized on mesoporous molecular sieves MCM-41 and SBA-15

2011 ◽  
Vol 7 ◽  
pp. 22-28 ◽  
Author(s):  
Hynek Balcar ◽  
Tushar Shinde ◽  
Naděžda Žilková ◽  
Zdeněk Bastl
Keyword(s):  
Nmr Spectroscopy ◽  
Molecular Sieves ◽  
Direct Interaction ◽  
Mesoporous Molecular Sieves ◽  
Support Surface ◽  
Wall Surface ◽  
Ring Closing Metathesis ◽  
Immobilized Catalysts ◽  
Metathesis Catalyst ◽  
Mcm 41

A commercially available Hoveyda–Grubbs type catalyst (RC303 Zhannan Pharma) was immobilized on mesoporous molecular sieves MCM-41 and on SBA-15 by direct interaction with the sieve wall surface. The immobilized catalysts exhibited high activity and nearly 100% selectivity in several types of alkene metathesis reactions. Ru leaching was found to depend on the substrate and solvent used (the lowest leaching was found for ring-closing metathesis of 1,7-octadiene in cyclohexane – 0.04% of catalyst Ru content). Results of XPS, UV–vis and NMR spectroscopy showed that at least 76% of the Ru content was bound to the support surface non-covalently and could be removed from the catalyst by washing with THF.

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