Mauro Matteo
Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR7504 Université de Strasbourg & CNRS 23 rue du Loess, 67083 Strasbourg, France.
Chem Commun (Camb). 2021 Jun 15;57(48):5857-5870. doi: 10.1039/d1cc01077h.
Luminescent transition metal complexes have attracted a great deal of attention in the last two decades from both fundamental and application points of view. The majority of the investigated and most efficient systems consist of monometallic compounds with judiciously selected ligand sphere, providing excellent triplet emitters for both lab-scale and real-market light-emitting devices for display technologies. More recently, chemical architectures comprising multimetallic compounds have appeared as an emerging and valuable alternative. Herein, the most recent trends in the field are showcased in a systematic approach, where the different examples are classified by metal center and ligand(s) scaffold. Their optical and electroluminescence properties are presented and compared as well. Indeed, the multimetallic strategy has proven to be highly suitable for compounds emitting efficiently in the challenging red to near-infrared region, yielding metal-based emitters with improved optical properties in terms of enhanced emission efficiency, shortened excited-state lifetime, and faster radiative rate constant. Finally, the advantages and drawbacks of the multimetallic approach will be discussed.
在过去二十年中，从基础研究和应用的角度来看，发光过渡金属配合物都引起了广泛关注。大多数被研究的且最有效的体系由具有精心选择配体球的单金属化合物组成，为实验室规模和实际市场的显示技术发光器件提供了优异的三线态发光体。最近，包含多金属化合物的化学结构作为一种新兴且有价值的替代方案出现了。在此，该领域的最新趋势以系统的方式展示，其中不同的例子按金属中心和配体支架进行分类。还展示并比较了它们的光学和电致发光性质。事实上，多金属策略已被证明非常适合在具有挑战性的红色到近红外区域高效发光的化合物，从而产生在发射效率提高、激发态寿命缩短和辐射速率常数更快方面具有改善光学性质的金属基发光体。最后，将讨论多金属方法的优缺点。
