Photophysics of Metal-Organic and Organometallic pi-Conjugated Oligomers

该奖项由无机、生物无机和有机金属化学项目颁发，支持佛罗里达大学Kirk S. Schanze教授对“金属-有机和有机金属偶联寡聚物的光物理学”的研究。pi共轭聚合物和低聚物构成了具有光学、电子和光电特性的新一代分子材料。研究人员正在研究含有过渡金属发色团的单分散pi共轭低聚物的激发态性质，以获得对其激发态性质的分子水平的理解。目标包括了解过渡金属发色团如何改变π共轭有机体系的激发态性质，以及π共轭分子如何改变金属配合物的激发态性质，特别是共轭低聚物的三重pi， pi*流形的性质。参与金属到配体电荷转移（MLCT）激发态的金属离子配合物包括Ru(II), Os（II）和Rh（III）与α -噻吩寡聚物，它们调节MLCT与单核和多核配合物中三重pi，pi*流形之间的能隙。我们将研究铂-乙酰基低聚物的激发态性质，以提供有关单重态、pi*和三重态、pi*激子的空间范围的清晰信息，并了解链间相互作用如何改变pi共轭pt -乙酰基的激发态性质。与过渡金属离子结合的π共轭分子的光化学性质正在研究其基本的光物理性质，其应用包括新型电子发光器件、光能转换、激光保护和塑料电子电路。

This award by the Inorganic, Bioinorganic and Organometallic Chemistry program supports research by Professor Kirk S. Schanze of the University of Florida to pursue studies on the "Photophysics of Metal-Organic and Organometallic pi-Conjugated Oligomers". Pi-conjugated polymers and oligomers comprise a new generation of molecular materials with technologically useful optical, electronic, and opto-electronic properties. Research is underway to investigate the excited state properties of mono-disperse pi-conjugated oligomers that contain transition metal chromophores to gain a molecular level understanding of their excited state properties. Objectives include an understanding of how transition metal chromophores modify the excited state properties of the pi-conjugated organic systems and how the pi-conjugated molecules modify the excited state properties of the metal complexes, particularly the properties of the triplet-pi, pi* manifold of the conjugated oligomer. Metal ion complexes involved in metal-to-ligand charge transfer (MLCT) excited states include Ru(II), Os(II) and Rh(III) with alpha-thiophene oligomers that modulate the energy gap between the MLCT and triplet-pi,pi* manifolds in both mono- and polynuclear complexes. The excited state properties of platinum-acetylide oligomers will be examined to provide clear information concerning the spatial extent of the singlet-pi,pi* and triplet-pi,pi* excitons and to understand how inter-chain interactions modify the excited state properties of the pi-conjugated Pt-acetylides.The photochemistry of pi-conjugated molecules attached to transition metal ions are being investigated as to their basic photophysical properties with applications that include novel electronic light-emitting devices, light-to electrical energy conversion, laser light protection, and plastic electronic circuits.