"In first section, synthesis and spectroscopic characterization of Ru(3,8-dibromo-l, 10-phenanthroline)3(PF6)2 are reported. Ruthenium coordination complexes play a central role in self-assembling supramolecular systems due to their chemical stability, redox properties and favorable photophysical, photochemical characteristics. The 1, 10- phenanthroline ligand, substituted at 3,8-positions, is sterically and geometrically favored and provides electronic conjugation. This project resulted in the first synthesis of Ru(3,8- dibromo-l, 10-phenanthroline)3(PF6)2, which could be used as a cross-linking core to generate metal-centered star-shaped hyperbranched assemblies. The NMR spectra, UV-Vis absorption spectra, and luminescence properties of this complex are also discussed.
In second section, magnetic field and temperature effects on the emission properties of d- and 1- tris(2,2'-bipyridyl) ruthenium (II) complexes are discussed. Over the last 10 years, a number of studies on the luminescence properties of Ru(bpy)32+ complexes have been reported and all of them referred to racemic Ru(bpy)32+ . The purpose of our investigation is to clarify whether the luminescence properties demonstrate difference due to different physical properties. We found that there is nearly no difference between the lifetimes of d-, I- and racemic Ru(bpy)32+ in the absence and presence of a magnetic field in CH3CN at room temperature. However, the single isomer (d- or I-form) showed lifetimes much longer than that for racemic mixture at 77 K in the absence of a magnetic field"--Abstract, page iii.
Nicholas C. Morosoff
M.S. in Chemistry
University of Missouri--Rolla
viii, 48 pages
© 2003 Penggao Duan, All rights reserved.
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Duan, Penggao, "Part 1, Synthesis and spectroscopic characterization of Ru(3,8-dibromo-1,10-phenanthroline)₃(PF₆)₂ ; Part 2, Magnetic field and temperature effects on the emission properties of d- and 1- tris(2,2'-bipyridyl)ruthenium(II) complexes" (2003). Masters Theses. 2408.
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