Abstract/Details

Electronic and Magnetic Structure of Octahedral Molecular Sieves


2011 2011

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Abstract (summary)

The major part of this research consists of magnetic and electronic studies of metal doped cryptomelane-type manganese oxide octahedral molecular sieves (KOMS-2). The second part of this study involves the magnetic characterization of cobalt doped MCM-41 before and after use in the synthesis of single walled carbon nanotubes.

Manganese oxides have been used widely as bulk materials in catalysis, chemical sensors, and batteries due to the wide range of possible stable oxidation states. The catalytic function of manganese oxides is further tuned by doping the material with numerous transition metals. It is of particular interest the oxidation states of Mn present after doping. New titrations to determine the oxidation state of Mn were investigated. To further examine the structure of KOMS-2, the magnetic contribution of dopant metals was also examined. The KOMS-2 structure having both diamagnetic and paramagnetic metal ions substitutions was studied.

MCM-41 with the incorporation of cobalt into the structure was analyzed for its magnetic properties. The material undergoes significant structural change during the synthesis of single walled carbon nanotubes. It was the focus of this portion of the research to do a complete magnetic profile of both the before and after reaction material.

Indexing (details)


Subject
Inorganic chemistry;
Solid State Physics
Classification
0488: Inorganic chemistry
0600: Solid State Physics
Identifier / keyword
Pure sciences; Carbon nanotubes; Cobalt; Magnetic structure; Manganese oxide; Metal doped cryptomelane; Octahedral molecular sieves
Title
Electronic and Magnetic Structure of Octahedral Molecular Sieves
Author
Morey-Oppenheim, Aimee M.
Number of pages
123
Publication year
2011
Degree date
2011
School code
0056
Source
DAI-B 73/04, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9781267112545
Advisor
Shib, Steven L.
University/institution
University of Connecticut
University location
United States -- Connecticut
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3492129
ProQuest document ID
916258302
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/916258302
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