Paul M LahtiDevaughn, Raymond2024-04-262014-06-092014-020210.7275/4917648https://hdl.handle.net/20.500.14394/44618Several fluorenone alkynyl based oligo conjugated molecules were synthesized and characterized. Most compounds exhibited UV-Vis absorption onset at ca. 500 nm and a PL emission onset of ~329-370 nm, with excimer emission suspected from most systems near ~530-560 nm. Experimentally determined EHOMO and ELUMO energies range from -6.02 to -5.73 eV and -3.47 and 3.55 eV, respectively, with the lowest experimental Eg lying at -2.26 eV for 2-(trimethoxyphenylacetylene)-fluorenone. Cyclic voltammetry indicates quasi-reversible reduction for all systems, with 2,7-bis(nitrophenylacetylene)fluorenone exhibiting a high reduction potential of -1.25 eV. Only 2,7-bis(trimethoxyphenylacetylene)fluorenone exhibited a quasi-reversible oxidation, due to electron rich methoxy substituents. Diketopyrrolopyrrole systems as electron acceptors were also explored.OPVphotovoltaicFluorenoneDiketopyrrolopyrroleMaterials ChemistryOrganic ChemistryThesis (Open Access)