Three-dimensional metal organic frameworks for atomic scale patterning
- UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
- Sheeba Dawood (Creator)
- Institution
- The University of North Carolina at Greensboro (UNCG )
- Web Site: http://library.uncg.edu/
- Advisor
- Hermali Rathnayake
Abstract: Metal organic frameworks (MOFs) belong to a sub class of coordination polymers in which metal ion nodes are connected with organic ligands to make three-dimensional framework. High porosity of MOFs makes them appealing in real-world applications, such as storage for harmful gasses, drug delivery cargo, and in recently for electronic devices. This dissertation focuses the development of a new synthetic design strategy that offers structural modifications to construct MOFs with tailored optoelectronic and magnetic properties. Combining a solvent driven self-assembly process with a solvothermal method, a series of highly crystalline hierarchical microstructures of isoreticular MOFs, having metal nodes of zinc, manganese, and iron were synthesized and their optoelectronic and magnetic properties were investigated. The synthesis method developed in this research enables tailoring the crystalline structure and its packing pattern, contributing to tailor their properties. The three isoreticular MOFs (IRMOFs) prepared using this novel synthesis method were interpenetrated IRMOF-8 (IRMOF-8A), MIL-88 and Mn-MOF. The structural composition, morphological characterization, and crystalline packing of these MOFs were confirmed. Using this novel synthetic strategy, the crystalline packing pattern and structural orientation of original IRMOF-8 were tailored, yielding its interpenetrating crystal structure with promising optoelectronic properties. Three isoreticular homologous of MIL-88 prepared in same manner by varying the organic linker length using benzene dicarboxylic acid (BDC), naphthalene dicarboxylic acid (NDC), and bi-phenyl dicarboxylic acid (BPDC) as organic linkers, show magnetic behavior below room temperature. Finally, 3D microstructures of Mn- MOF prepared by coordinating Mn+2 with NDC exhibits luminescent behavior, attributing to the ligand emission. The hierarchical structures of isoreticular MOFs developed in this research will contribute to the potential applications in optoelectronic, memory storage, and light harvesting devices, respectively.
Three-dimensional metal organic frameworks for atomic scale patterning
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Created on 8/1/2020
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Additional Information
- Publication
- Dissertation
- Language: English
- Date: 2020
- Keywords
- Coordination Polymer, Isoreticular series, Magnetic properties, Metal organic frameworks, Opto-electronic properties, Self-assembly
- Subjects
- Metal-organic frameworks
- Metals $x Microstructure
- Magnetic properties
- Optoelectronics