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Polymorphism and dielectric properties of crystals of dabco·HA(HA = HI, HBr, HClO4)
Anna Olejniczak
Abstract
Materials with exceptional dielectric properties are coveted for electronic applications. It results from the miniaturization process of electronic devices, increasing their working speed and searching for effective ways of information and energy storage. The NH+···N hydrogen bonded ferroelectrics and relaxors are the materials with the desired properties. In this work I studied the polymorphism, NH+···N hydrogen bonds and other intermolecular interactions. As the objects of my research I chose the 1,4-diazabicyclo[2.2.2]octane complexes with HBr and HI (dabcoHI and dabcoHBr), because of their exceptional properties and potential applications, and the ferroelectric complex of 1,4-diazabicyclo[2.2.2]octane with HClO4. I obtained the crystals of new polymorphs at high pressure from the substance dissolved in water, methanol or ethanol, crystallized them and carried out the diffraction measurements. My studies revealed that dabcoHI forms at least ten polymorphs, dabcoHBr forms only two polymorphs and for dabcoHClO4 I obtained one new high-pressure form, different from those five obtained previously at atmospheric pressure.- Record ID
- UAM67a8227e55ca4bcba7ac180446a74d7a
- Diploma type
- Doctor of Philosophy
- Author
- Title in Polish
- Polimorfizm i właściwości dielektryczne kryształów dabco·HA(HA = HI, HBr, HClO4)
- Title in English
- Polymorphism and dielectric properties of crystals of dabco·HA(HA = HI, HBr, HClO4)
- Language
- pol (pl) Polish
- Certifying Unit
- Faculty of Chemistry (SNŚ/WC/FoC)
- Discipline
- chemistry / (chemical sciences domain) / (physical sciences)
- Scientific discipline (2.0)
- Status
- Finished
- Defense Date
- 09-06-2010
- Title date
- 09-06-2010
- Supervisor
- URL
- http://hdl.handle.net/10593/441 Opening in a new tab
- Keywords in English
- high-pressure crystallization, polymorphism, dielectric properties, hydrogen bonds
- Abstract in English
- Materials with exceptional dielectric properties are coveted for electronic applications. It results from the miniaturization process of electronic devices, increasing their working speed and searching for effective ways of information and energy storage. The NH+···N hydrogen bonded ferroelectrics and relaxors are the materials with the desired properties. In this work I studied the polymorphism, NH+···N hydrogen bonds and other intermolecular interactions. As the objects of my research I chose the 1,4-diazabicyclo[2.2.2]octane complexes with HBr and HI (dabcoHI and dabcoHBr), because of their exceptional properties and potential applications, and the ferroelectric complex of 1,4-diazabicyclo[2.2.2]octane with HClO4. I obtained the crystals of new polymorphs at high pressure from the substance dissolved in water, methanol or ethanol, crystallized them and carried out the diffraction measurements. My studies revealed that dabcoHI forms at least ten polymorphs, dabcoHBr forms only two polymorphs and for dabcoHClO4 I obtained one new high-pressure form, different from those five obtained previously at atmospheric pressure.
- Thesis file
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- File: 1
- Polimorfizm i właściwości dielektryczne kryształów dabco·HA(HA = HI, HBr, HClO4), File PracaOlejniczakAnna.pdf / 25 MB
- PracaOlejniczakAnna.pdf
- publication date: 13-12-2019
- Polimorfizm i właściwości dielektryczne kryształów dabco·HA(HA = HI, HBr, HClO4), File PracaOlejniczakAnna.pdf / 25 MB
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- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/phd/UAM67a8227e55ca4bcba7ac180446a74d7a/
- URN
urn:amu-prod:UAM67a8227e55ca4bcba7ac180446a74d7a