High Quantum Efficiency Coordination Polymers and Networks for OLED Application

本项目的目标是合成和研究具有潜在应用前景的自组织电致发光配位聚合物。多组分材料被设计成利用三重态-三重态能量转移来将电致发光体的发射单重态和非辐射三重态的能量收集到发射受体。合成了两种发光配位聚合物。目标材料将使用有机金属合成方法制备;稳态和时间相关荧光和瞬态光谱将用于研究拟议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。利用喹啉酸盐配合物的配位聚合物是罕见的，并且它们用于OLED的潜力尚未被研究。与共轭聚合物或低聚物直接相连的金属配合物可以被看作是电致发光材料的两大类--低分子金属配合物和共轭低聚物之间缺失的一环。通过将共轭低聚物连接到喹啉酸配体（供体）上，可以有效地稳定激子，并通过Dexter机制促进三重态-三重态能量转移到卟啉受体上.预测了组分能级的调节将在共轭间隔子中诱导分子线行为，并提高所得材料的能量传递和量子性能。%%% 该项目涉及与具有技术相关性的电子/光子材料相关的基础研究问题。该项目推进了一般知识，以及产生新的材料，显示出独特的光子特性所产生的协同作用，在供体/受体金属络合物和聚合物的光物理行为。这些配位聚合物有望成为新型的有机电致发光器件材料，为平板显示技术的发展做出贡献。该PI的研究小组将通过出版物和积极参与会议，积极参与跨学科讨论，重点关注科学和OLED工程的各个方面。社会利益通过教育的进步产生，有助于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.***