High Quantum Efficiency Coordination Polymers and Networks for OLED Application

本项目的目标是合成和研究可用于有机电致发光二极管(OLED)的自组织电致发光配位聚合物的光物理性质。多组分材料被设计成利用三重态-三重态的能量转移来将电致发光体的发射单态和非辐射三重态的能量收集到发射接受者。将合成两种类型的发光配位聚合物。目标材料将用有机金属合成的方法制备，稳态和时间相关的荧光和瞬变光谱将被用来研究所提出的材料中的能量转移过程。合成的化合物和材料的电致发光也将使用简单的OLED器件进行研究。使用喹啉络合物的配位聚合物很少见，它们作为有机发光器件的潜力还没有被研究过。直接连接到共轭聚合物或低聚物的金属络合物可以被视为两类主要电致发光材料--低分子金属络合物和共轭低聚物之间缺失的一环。预计共轭低聚物与喹啉配体(给体)的连接将为激子的稳定提供一种有效的手段，并通过Dexter机制促进三重-三重能量转移到卟啉受体。可以预见，通过调节各组分的能级，可以在共轭间隔体中引入分子线行为，从而提高材料的能量传递和量子性能。该项目解决与具有技术相关性的电子/光子材料相关的基础研究问题。该项目促进了一般知识的发展，并产生了由于施主/受主金属络合物和聚合物的光物理行为的协同作用而显示出独特的光子性质的新材料。所提出的配位聚MERS可能产生新型器件(OLED)材料，有助于平板显示技术的进步。这个PI的研究小组将通过出版和积极参与会议，积极参与以科学和OLED工程的各个方面为重点的跨学科讨论。社会效益是通过教育的进步而产生的，这意味着对未来高素质劳动力的专业培训。

The objective of this project is the synthesis and study of photophysical properties of self-organized electroluminescent coordination polymers that can be potentially used in organic light-emitting diodes (OLEDs). The multi-component materials are designed to utilize triplet-triplet energy transfer for harvesting the energy of both emissive singlet and nonradiative triplet states of electrolumophores to an emissive acceptor. Two types of emissive coordination polymers will be synthesized. The target materials will be prepared using the methods of organometallic syn-thesis; steady-state and time-correlated fluorescence and transient spectroscopy will be used to study the energy transfer processes in the proposed materials. The electroluminescence of the synthesized compounds and materials will be also investigated using simple OLED devices. Co-ordination polymers utilizing quinolinolate complexes are rare, and their potential for OLEDs has not been investigated. The metallocomplexes directly connected to the conjugated polymer or oligomer may be viewed as the missing link between the two main groups of electroluminescent materials-low-molecular metallocomplexes and conjugated oligomers. It is expected that the at-tachment of conjugated oligomers to the quinolinolate ligand (donor) will provide a means for ef-fective exciton stabilization and facilitate triplet-triplet energy transfer to porphyrin acceptors via the Dexter mechanism. It is predicted that the tuning of energy levels of the components will in-duce molecular wire behavior in the conjugated spacer, and increase energy transfer and quantum performance of the resulting materials. %%% The project addresses fundamental research issues associated with electronic/photonic materials having technological relevance. The project advances general knowledge as well as yielding novel materials displaying unique photonic properties arising from synergy in the photophysical behavior of donor/acceptor metallocomplexes and polymers. The proposed coordination poly-mers may yield new types of device (OLEDs) materials, contributing to the advancement of flat panel display technologies. This PI's research group will be active in an interdisciplinary discus-sion focused on various aspects of science and OLED engineering through publication and active participation in meetings. Societal benefits occur through the advancement of education contrib-uting to professional training of a highly qualified future workforce.***