A plethora of novel scientific phenomena and practical applications, such as solid-state
molecular solar cells and other optoelectronic devices for energy harvesting and lighting
technologies, have catalyzed us to synthesize novel compounds with tunable properties. Synthetic
routes, single crystal structures, and spectral and materials properties are described. Reactions of
Ag(I) and Cu(I) precursors with various types of ligands -- including the azolates, diimines, and
diiphosphines -- lead to the corresponding complexes in high yield. Varying the metal ions,
ligands, synthetic methods, solvents, and/or stoichiometric ratio can change the properties
including the molecular geometry or packing structure, reactivity, photophysical and
photochemical properties, semiconducting behavior, and/or porosity of the functional coordination
polymers obtained. For solar cells purposes, the absorption energy can be extended from the
ultraviolet (UV) region, through the entire visible (Vis) region, onto a significant portion of the
near-infrared (NIR) portion of the solar spectrum with high absorption coefficients due to the
infinite conjugation of Cu(I) with diimine ligands. Twenty-eight crystal structures were obtained
by conventional crystal growth methods from organic solvents, whereas their bulk product
syntheses also included "green chemistry" approaches that precluded the use of hazardous organic
solvents. The resulting products are characterized by powder x-ray diffraction (PXRD), Fourier
transform infrared (FTIR), nuclear magnetic resonance (NMR), UV/Vis/NIR absorption/diffuse
reflectance/photoluminescence spectroscopies, and thermogravimetric analysis (TGA).
Regarding the scientific phenomena investigated, the highlighting work in this dissertation
is the discovery of novel bonding/photophysical/optoelectronic properties of the following
materials: a black absorber with absorption from 200- 900 nm, a very stable compound with a
bright green luminescence obtained by a solventless reaction, and a novel coordination polymer
showing uncommon interaction of Ag(I) with three different types of diimine ligands
simultaneously.
| Identifer | oai:union.ndltd.org:unt.edu/info:ark/67531/metadc2356254 |
| Date | 12 1900 |
| Creators | Almotawa, Ruaa Mohammed |
| Contributors | Omary, Mohammad A., Cundari, Thomas R., D'Souza, Francis, Golden, Teresa D. |
| Publisher | University of North Texas |
| Source Sets | University of North Texas |
| Language | English |
| Detected Language | English |
| Type | Thesis or Dissertation |
| Format | Text |
| Rights | Public, Almotawa, Ruaa Mohammed, Copyright, Copyright is held by the author, unless otherwise noted. All rights Reserved. |
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