Synthesis and photophysical investigation of supramolecular complexes developed for photoinitiated electron collection

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dc.contributor.authorMolnar, Sharon Marieen
dc.contributor.committeechairBrewer, Karen J.en
dc.contributor.committeememberAnderson, Mark R.en
dc.contributor.committeememberDillard, John G.en
dc.contributor.committeememberHanson, Brian E.en
dc.contributor.committeememberMerola, Joseph S.en
dc.contributor.departmentChemistryen
dc.date.accessioned2014-03-14T21:22:34Zen
dc.date.adate2005-10-26en
dc.date.available2014-03-14T21:22:34Zen
dc.date.issued1996en
dc.date.rdate2005-10-26en
dc.date.sdate2005-10-26en
dc.description.abstractIn this research, photochemical molecular devices were designed to perform photoinitiated electron collection. These devices were synthesized, characterized and their spectroscopic, photochemical and electrochemical properties investigated. The general formula for these systems is {[(bpy)₂Ru(BL)]₂MCl₂}⁵⁺ (M = Ir<sup>III</sup> and BL = dpq (2,3-bis(2- pyridyl)quinoxaline) or dpb (2,3-bis(2-pyridyl)benzoquinoxaline), or M = Rh<sup>III</sup>, BL = dpp (2,3-bis(2-pyridyl)pyrazine)). The functioning of these devices as photoinitiated electron collectors was determined. Through the use of a sacrificial electron donor in a photolysis experiment, the functioning of the {[(bpy)₂Ru(dpb)]₂IrCl₂}⁵⁺ trimetallic complex as a photochemical molecular device for photoinitiated electron collection was established. The interaction of the electron donor with the trimetallic complex was also investigated through a Stern-Volmer quenching study. To tune the properties of the chromophoric units, [Ru₂(bpy)(BL)]²⁺, the bridging ligand was varied. The dpq bridging ligand was modified through the incorporation of electron donating and electron withdrawing substituents. The 6,7-dimethyl-2,3-bis(2’- pyridyl)quinoxaline and 6,7-chloro-2,3-bis(2’-pyridyl)quinoxaline bridging ligands were synthesized and characterized. The ruthenium mono- and bimetallic complexes utilizing these bridging ligands, as well as dpb, were synthesized and investigated. It was shown that the light absorbing and electrochemical properties of these [Ru(bpy)₂(BL)]²⁺ chromophores can be varied by altering the π-acceptor nature of the bridging ligand.en
dc.description.degreePh. D.en
dc.format.extentxix, 184 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-10262005-143545en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10262005-143545/en
dc.identifier.urihttp://hdl.handle.net/10919/40243en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1996.M656.pdfen
dc.relation.isformatofOCLC# 38025474en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1996.M656en
dc.titleSynthesis and photophysical investigation of supramolecular complexes developed for photoinitiated electron collectionen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineChemistryen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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