Ruthenium bistridentate complexes with non-symmetrical hexahydro-pyrimidopyrimidine ligands: a structural and theoretical investigation of their optical and electrochemical properties
作者:Baptiste Laramée-Milette、Garry S. Hanan
DOI:10.1039/c6dt02408d
日期:——
structural effect on the optical properties, density functional theory (DFT) and time-dependent DFT calculations have been implemented to enlighten the experimental data and prove that exciton coupling is at the origin of the observed shift. The electronic properties have been investigated and, as corroborated by electrochemical data, the presence of the hpp ligand strongly affects the oxidation potential
基于三个带有强电子给体基团1,3,4,6,7,8-hexahydro-2 H-嘧啶[1,2- α ]嘧啶(hpp)的非对称三齿配体合成了六种钌配合物,bpyG(bpyG = 2,2'-联吡啶-6-hpp),phenG(phenG = 2-hpp-1,10-菲咯啉)和QpyG(QpyG = 2-hpp-6-喹啉基吡啶基)。的FAC - /聚体的均配型物种的-conformation对光学特性,其中一个显着的影响FAC-异构体的吸收发生红移150 nm,从而在大约850 nm处达到近红外。由于对光学性质的有趣结构影响,已实施了密度泛函理论(DFT)和时变DFT计算,以启发实验数据并证明激子耦合是观察到的位移的起源。已经研究了电子性质,并且通过电化学数据证实,hpp配体的存在强烈影响钌金属离子的氧化电位,这使得可以容易地微调电子性质。还研究了所有化合物的发光特性(最大λ发射光谱= 781–817