一种用于改善具有三齿配体的钌（II）配合物室温发光性质的策略。
A strategy for improving the room-temperature luminescence properties of Ru(II) complexes with tridentate ligands.
作者信息
Fang Yuan-Qing, Taylor Nicholas J, Hanan Garry S, Loiseau Frédérique, Passalacqua Rosalba, Campagna Sebastiano, Nierengarten Hélène, Van Dorsselaer Alain
机构信息
Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada.
出版信息
J Am Chem Soc. 2002 Jul 10;124(27):7912-3. doi: 10.1021/ja0261776.
Several ruthenium(II) complexes with new tridentate polypyridine ligands have been prepared, and their photophysical properties have been studied. The new tridentate ligands are tpy-modified systems (tpy = 2,2':6',2' '-terpyridine) in which aromatic substituents designed to be coplanar with the tpy moiety are introduced, with the aim of enhancing delocalization in the acceptor ligand of the potentially luminescent metal-to-ligand charge-transfer (MLCT) state and increasing the MLCT-MC energy gap (MC = metal-centered excited state). Indeed, the Ru(II) complexes obtained with this new family of tridentate ligands exhibit long-lived luminescence at room temperature (up to 200 ns). The enhanced luminescence properties of these complexes support this design strategy and are superior to those of the model Ru(tpy)22+ compound and compare favorably with those of the best Ru(II) complexes with tridentate ligands reported so far.
已制备了几种带有新型三齿多吡啶配体的钌（II）配合物，并对其光物理性质进行了研究。新型三齿配体是经tpy修饰的体系（tpy = 2,2':6',2''-三联吡啶），其中引入了设计成与tpy部分共平面的芳族取代基，目的是增强潜在发光的金属到配体电荷转移（MLCT）态的受体配体中的离域作用，并增加MLCT-MC能隙（MC = 以金属为中心的激发态）。实际上，用这一新系列三齿配体制得的Ru（II）配合物在室温下表现出长寿命发光（长达200 ns）。这些配合物增强的发光性质支持了这一设计策略，并且优于模型Ru（tpy）22+化合物的发光性质，与迄今为止报道的具有三齿配体的最佳Ru（II）配合物相比也毫不逊色。
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