Platinum(II) Complexes of Tridentate ‐Coordinating Ligands Based on Imides, Amides, and Hydrazides: Synthesis and Luminescence Properties
作者:Emma V. Puttock、Jiri Sturala、Jos C. M. Kistemaker、J. A. Gareth Williams
DOI:10.1002/ejic.202000879
日期:2021.1.26
Five Pt(II) complexes are described in which the metal ion is bound to anionic ‐coordinating ligands. The central, deprotonated N atom is derived from an imide Ar−C(=O)−NH−C(=O)−Ar PtL1–2Cl; Ar=pyridine or pyrimidine}, an amide py−C(=O)−NH−CH2−py PtL3Cl}, or a hydrazide py−C(=O)−NH−N=CH−py PtL4Cl}. The imide complexes PtL1–2Cl show no significant emission in solution but are modestly bright green/yellow
描述了五种Pt(II)配合物,其中金属离子与阴离子 配位体结合。中心的,去质子化的N原子衍生自酰亚胺Ar-C(= O)-NH-C(= O)-Ar PtL 1-2 Cl; Ar =吡啶或嘧啶},酰胺py-C(= O)-NH-CH 2 -py PtL 3 Cl}或酰肼py-C(= O)-NH-N = CH-py PtL 4 Cl}。酰亚胺络合物PtL 1-2 Cl在溶液中未显示出明显的发射,但呈固态的适度亮绿色/黄色磷光体。PtL 3 Cl弱磷光。PTL 4Cl形成为异构体的混合物,通过酰胺基或亚氨基氮键结合,后者在吸收光后转变为前者。明显地,亚氨基形式在溶液中显示荧光,λ0,0 = 535 nm,而酰胺基显示磷光,λ0,0 = 624 nm,τ= 440 ns。两种同分异构化合物显示出自旋多重性不同的状态的发射是非常不寻常的。酰胺键合的PtL 4 Cl可以充当二齿 配位配体,与铱(