Template synthesis and characterisation of MCM-41 mesoporous molecular sieves containing various transition metal elements—TME (Cu, Fe, Nb, V, Mo)

2004 ◽  
Vol 65 (2-3) ◽  
pp. 571-581 ◽  
Author(s):  
M Ziolek ◽  
I Nowak ◽  
B Kilos ◽  
I Sobczak ◽  
P Decyk ◽  
...  
Keyword(s):  
Transition Metal ◽  
Template Synthesis ◽  
Molecular Sieves ◽  
Mesoporous Molecular Sieves ◽  
Metal Elements ◽  
Mcm 41 ◽  
Transition Metal Elements

New Class of Diluted Ferromagnetic Semiconductors based on CaO without Transition Metal Elements

2004 ◽  
Vol 43 (No. 7A) ◽  
pp. L934-L936 ◽  
Author(s):  
Kazuhide Kenmochi ◽  
Masayoshi Seike ◽  
Kazunori Sato ◽  
Akira Yanase ◽  
Hiroshi Katayama-Yoshida
Keyword(s):  
Transition Metal ◽  
Ferromagnetic Semiconductors ◽  
Metal Elements ◽  
New Class ◽  
Transition Metal Elements

scholarly journals Polarizable Charge Equilibration Model for Transition-Metal Elements

2018 ◽  
Vol 122 (48) ◽  
pp. 9350-9358 ◽  
Author(s):  
Soonho Kwon ◽  
Saber Naserifar ◽  
Hyuck Mo Lee ◽  
William A. Goddard
Keyword(s):  
Transition Metal ◽  
Metal Elements ◽  
Charge Equilibration ◽  
Equilibration Model ◽  
Transition Metal Elements

scholarly journals Preparation and Magnetic Properties of X-type Hexaferrites with Transition Metal Elements

2010 ◽  
Vol 57 (12) ◽  
pp. 809-813
Author(s):  
Nobuyuki Hosaka ◽  
Kenji Kamishima ◽  
Koichi Kakizaki ◽  
Nobuyuki Hiratsuka
Keyword(s):  
Magnetic Properties ◽  
Transition Metal ◽  
Metal Elements ◽  
Transition Metal Elements

Effect of rehydration on the porosity of MCM-41 mesoporous molecular sieves

1999 ◽  
Vol 35 (1) ◽  
pp. 52-56
Author(s):  
F. M. Bobonich ◽  
Yu. G. Voloshina ◽  
L. A. Matkovskaya ◽  
V. N. Solomakha ◽  
Yu. G. Gol’tsov
Keyword(s):  
Molecular Sieves ◽  
Mesoporous Molecular Sieves ◽  
Mcm 41

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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