Synthesis of New Molecule-Based Magnets using Bridging Organic Radicals

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dc.contributor.authorHouser, Christopher L.en
dc.contributor.committeechairYee, Gordon T.en
dc.contributor.committeememberMayhall, Nicholas J.en
dc.contributor.committeememberSlebodnick, Carlaen
dc.contributor.committeememberDeck, Paul A.en
dc.contributor.departmentChemistryen
dc.date.accessioned2019-07-13T08:00:28Zen
dc.date.available2019-07-13T08:00:28Zen
dc.date.issued2019-07-12en
dc.description.abstractSeveral new families of organic acceptors that are candidates as building blocks of molecule-based ferrimagnets were synthesized and characterized. These families include fluorodicyanostilbenes, a tetrachlorodicyanostilbene, naphthyltricyanoethylenes, bromophenyltricyanoethylenes, and an anthryltricyanoethylene. The magnetic networks were synthesized by reacting each acceptor with V(CO)6. The magnets synthesized in this study were characterized using a SQUID magnetometer, elemental analysis, and infrared spectroscopy. Although some combinations failed to yield magnetically ordered materials, others exhibited ordering temperatures in the range of 95 K – 260 K. The ordering temperatures and saturation magnetizations were compared among families of acceptors and correlated with individual properties of the acceptors such as reduction potential and structure.en
dc.description.abstractgeneralSeveral new families of organic molecules have been created and examined for use as building blocks of molecule-based magnets. These families include fluorodicyanostilbenes, a tetrachlorodicyanostilbene, naphthyltricyanoethylenes, bromophenyltricyanoethylenes, and an anthryltricyanoethylene. The 3-D magnetic scaffoldings were created by combining an individual organic molecule in one of the families listed above with vanadium. The magnets created in this study were examined using a SQUID magnetometer, elemental analysis, and infrared spectroscopy. Some of the combinations of the organic molecules with vanadium failed to result in a 3-D magnetic scaffolding and showed no magnetic properties. Others showed magnetic properties in the below certain temperatures in the range of 95 K – 260 K. The magnetic properties were compared among families of molecules and correlated with individual properties of each molecule such as electronic effects and structure.en
dc.description.degreeDoctor of Philosophyen
dc.format.mediumETDen
dc.identifier.othervt_gsexam:21603en
dc.identifier.urihttp://hdl.handle.net/10919/91440en
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectmagnetismen
dc.subjectTCNE derivativesen
dc.subjectbridging radical anionsen
dc.subjectvanadium magnetsen
dc.titleSynthesis of New Molecule-Based Magnets using Bridging Organic Radicalsen
dc.typeDissertationen
thesis.degree.disciplineChemistryen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.nameDoctor of Philosophyen

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