Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Epoxidation of olefins catalyzed by a molybdenum-Schiff base complex anchored in the pores of SBA-15
Date
2014-12-01
Author
Bagherzadeh, Mojtaba
Zare, Maryam
Amini, Mojtaba
Salemnoush, Taghi
Akbayrak, Serdar
Özkar, Saim
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
180
views
0
downloads
Cite This
Novel mesostructured hybrid materials containing a molybdenum Schiff base complex grafted on the internal surface of SBA-15 pores were prepared by introducing MoO2(acac)(2) into a mesoporous silica functionalized with Schiff base ligands. The SBA-15 supports modified by an amine or salicylaldehyde were obtained by co-condensation of tetraethylorthosilicate and the corresponding organosilane in the presence of Pluronic P123 surfactant as a structure directing agent using bis[3-(trimethoxysilyl)propyl]amine or 5-chloromethylsalicylaldehyde coupled with bis[3-(trimethoxysilyl)propyl]amine as precursor. The molybdenum (VI) complexes immobilized on the internal surface of SBA-15 pores were employed as catalyst in the epoxidation of various alkenes using tert-butylhydroperoxide as oxidant. These immobilized molybdenum complexes are highly active and selective catalysts in liquid phase olefin epoxidation in dichloroethane at 84 degrees C. Leaching tests and metal analysis of reaction solutions showed that the kinetically competent catalyst is the molybdenum complex immobilized on the internal surface of SBA-15 pores and there is no molybdenum species in the solution. (C) 2014 Elsevier B.V. All rights reserved.
Subject Keywords
Physical and Theoretical Chemistry
,
Process Chemistry and Technology
,
Catalysis
URI
https://hdl.handle.net/11511/70018
Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
DOI
https://doi.org/10.1016/j.molcata.2014.09.004
Collections
Department of Chemistry, Article
Suggestions
OpenMETU
Core
Novel neutral phosphinite bridged dinuclear ruthenium(II) arene complexes and their catalytic use in transfer hydrogenation of aromatic ketones: X-ray structure of a new Schiff base, N3,N3 '-di-2-hydroxybenzylidene-[2,2 ']bipyridinyl-3,3 '-diamine
AYDEMİR, MURAT; DURAP, FEYYAZ; BAYSAL, AKIN; MERİÇ, NERMİN; Buldag, Ayseguel; Guemguem, Bahattin; Özkar, Saim; Yildirim, Leyla Tatar (Elsevier BV, 2010-07-01)
A novel Schiff base N3,N3'-di-2-hydroxybenzylidene-[2,2']bipyridinyl-3,3'-diamine, 1 was synthesized from condensation of salicylaldehyde with 3,3'-diamino-2,2'-bipyridine. Reaction of 1 with two equivalents of PPh(2)Cl in the presence of Et(3)N proceeds in toluene to give N3,N3'-di-2-(diphenylphosphino)benzylidene-[2,2']bipyridinyl-3,3'-diamine, 2 in quantitative yield. Ruthenium(II) dimers [Ru(eta(6)-arene)(mu-Cl)]Cl](2) readily react with phosphinite ligand [(Ph(2)PO)(2)-C(24)H(16)N(4)], 2 in toluene at ...
Remarkable cooperative action of two zinc centers in the hydrolysis of plasmid DNA
Aka, FN; Akkaya, Mahinur; Akkaya, EU (Elsevier BV, 2001-01-08)
A novel binuclear zinc complex has been synthesized. The complex is highly efficient in the hydrolysis of plasmid DNA at pH 7.5. Furthermore, a comparison to a mononuclear complex reveals a high level of cooperativity between the two metal ion centers.
Active carbon/graphene hydrogel nanocomposites as a symmetric device for supercapacitors
ATEŞ, MURAT; Cinar, Damla; Caliskan, Sinan; GEÇGEL, ÜNAL; ÜNER, OSMAN; BAYRAK, YÜKSEL; Candan, Idris (Informa UK Limited, 2016-01-01)
Activated carbons (ACs) are successfully synthesized from Elaeagnus grain by a simple chemical synthesis methodology and demonstrated as novel, suitable supercapacitor electrode materials for graphene hydrogel (GH)/AC nanocomposites. GH/AC nanocomposites are synthesized via hydrothermal process at temperature of 180 degrees C. The low-temperature thermal exfoliation approach is convenient for mass production of graphene hydrogel (GH) at low cost and it can be used as electrode material for energy storage ap...
Carboligation reactivity of benzaldehyde lyase (BAL, EC 4.1.2.38) covalently attached to magnetic nanoparticles
TURAL, Bilsen; Turan, Ilke Simsek; TURAL, SERVET; Celebi, Bulent; Demir, Ayhan Sıtkı (Elsevier BV, 2013-03-31)
Epoxy-functionalized Fe3O4-SiO2 core-shell magnetic nanoparticles (epoxy-M-support) were prepared by modification with glycidyloxypropyltrimethoxysilane (GPTMS) and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and fourier transform infrared spectroscopy (FTIR) methods. Pure histidine-tagged recombinant benzaldehydelyase (BAL, EC 4.1.238) was efficiently immobilized onto the epoxy-M-support with covalent binding. An immobilized BAL epoxy-M-support system was tested to cat...
Highly active, robust and reusable micro-/mesoporous TiN/Si3N4 nanocomposite-based catalysts for clean energy: Understanding the key role of TiN nanoclusters and amorphous Si3N4 matrix in the performance of the catalyst system
Lale, Abhijeet; Mallmann, Maira Debarba; Tada, Shotaro; Bruma, Alina; Özkar, Saim; Kumar, Ravi; Haneda, Masaaki; Machado, Ricardo Antonio Francisco; Iwamoto, Yuji; Demirci, Umit B.; Bernard, Samuel (Elsevier BV, 2020-09-05)
Herein, we developed a precursor approach toward the design of a titanium nitride (TiN)/silicon nitride (Si3N4) nanocomposite with an activated carbon monolith as a support matrix forming a highly micro-/mesoporous component to be used as a Pt support for the catalytic hydrolysis of sodium borohydride (NaBH4) as a model reaction. The experimental data demonstrated that the amorphous Si3N4 matrix, the strong Pt-TiN nanocluster interaction and the synergistic effects between the three components contributed t...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
M. Bagherzadeh, M. Zare, M. Amini, T. Salemnoush, S. Akbayrak, and S. Özkar, “Epoxidation of olefins catalyzed by a molybdenum-Schiff base complex anchored in the pores of SBA-15,”
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
, pp. 470–480, 2014, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/70018.