Chou Pi-Tai, Chi Yun
Department of Chemistry, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
Chemistry. 2007;13(2):380-95. doi: 10.1002/chem.200601272.
This article presents general concepts that have guided important developments in our recent research progress regarding room-temperature phosphorescent dyes and their potential applications. We first elaborate the theoretical background for emissive metal complexes and the strategic design of the chelating C-linked 2-pyridylazolate ligands, followed by their feasibility in functionalization and modification in an aim to fine-tune the chemical and photophysical properties. Subsequently, incorporation of 2-pyridylazolate chromophores is illustrated in the synthesis of the highly emissive, charge-neutral Os, Ru, Ir, and Pt complexes. Insights into their photophysical properties are gained from spectroscopy, relaxation dynamics, and theoretical approaches, from which the lowest-lying excited states, competitive radiative decay, and radiationless processes are then analyzed in detail. In view of applications, their potentials for OLEDs have been evaluated. The results, in combination with the fundamental basis, give a conceptual design contributed to the future advances in the field of OLEDs.
本文介绍了一些通用概念，这些概念指导了我们近期在室温磷光染料及其潜在应用方面的重要研究进展。我们首先阐述了发光金属配合物的理论背景以及螯合的C-连接2-吡啶唑配体的策略设计，随后讨论了它们在功能化和修饰方面的可行性，旨在微调其化学和光物理性质。接下来，在高发光、电荷中性的Os、Ru、Ir和Pt配合物的合成中展示了2-吡啶唑发色团的引入。通过光谱学、弛豫动力学和理论方法深入了解了它们的光物理性质，并在此基础上详细分析了最低激发态、竞争性辐射衰变和无辐射过程。考虑到应用，评估了它们在有机发光二极管（OLED）中的潜力。这些结果与基础理论相结合，为OLED领域的未来发展提供了一个概念性设计。
