Li Kai, Ming Tong Glenna So, Wan Qingyun, Cheng Gang, Tong Wai-Yip, Ang Wai-Hung, Kwong Wai-Lun, Che Chi-Ming
State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China . Email:
HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053 , China.
Chem Sci. 2016 Mar 1;7(3):1653-1673. doi: 10.1039/c5sc03766b. Epub 2016 Jan 7.
In recent years a blossoming interest in the synthesis, photophysics and application of phosphorescent Pt(ii) complexes, particularly on their uses in bioimaging, photocatalysis and phosphorescent organic light-emitting diodes (OLEDs), has been witnessed. The superior performance of phosphorescent Pt(ii) complexes in these applications is linked to their diverse spectroscopic and photophysical properties, which can be systematically modulated by appropriate choices of auxiliary ligands. Meanwhile, an important criterion for the practical application of phosphorescent metal complexes is their stability which is crucial for biological utilization and industrial OLED applications. Taking both the luminescence properties and stability into consideration, chelating ligands having rigid scaffolds and with strong σ-donor atoms are advantageous for the construction of highly robust phosphorescent Pt(ii) complexes. The square-planar coordination geometry endows Pt(ii) complexes with the intriguing spectroscopic and photophysical properties associated with their intermolecular interactions in both the ground and excited states. In this article, we discuss the design and synthesis of phosphorescent Pt(ii) complexes with elaboration on the effects of ligands on the structure and luminescence properties. Based on their photophysical and emission properties, we intend to shed light on the great promise of highly robust phosphorescent Pt(ii) emitters in an array of applications from molecular materials to biosensors.
近年来，人们对磷光铂（II）配合物的合成、光物理性质及应用，尤其是其在生物成像、光催化和磷光有机发光二极管（OLED）中的应用，表现出了浓厚的兴趣。磷光铂（II）配合物在这些应用中的卓越性能与其多样的光谱和光物理性质有关，通过适当选择辅助配体可以对这些性质进行系统调节。同时，磷光金属配合物实际应用的一个重要标准是其稳定性，这对于生物利用和工业OLED应用至关重要。综合考虑发光性质和稳定性，具有刚性骨架且含有强σ供体原子的螯合配体有利于构建高度稳健的磷光铂（II）配合物。平面正方形配位几何结构赋予铂（II）配合物在基态和激发态下与分子间相互作用相关的有趣光谱和光物理性质。在本文中，我们讨论了磷光铂（II）配合物的设计与合成，并详细阐述了配体对其结构和发光性质的影响。基于它们的光物理和发射性质，我们旨在揭示高度稳健的磷光铂（II）发光体在从分子材料到生物传感器等一系列应用中的巨大潜力。
