Ni, Pd, and Pt complexes of a tetradentate dianionic thiosemicarbazone-based O^N^N^S ligand
作者:Alexander Haseloer、Luca Mareen Denkler、Rose Jordan、Max Reimer、Selina Olthof、Ines Schmidt、Klaus Meerholz、Gerald Hörner、Axel Klein
DOI:10.1039/d1dt00272d
日期:——
New tetradentate phenolate O^N^N^S thiosemicarbazone (TSC) ligands and their Ni(II), Pd(II) and Pt(II) complexes were studied. The diamagnetic and square planar configured orange or red complexes show reversible reductive electrochemistry and in part reversible oxidative electrochemistry at very moderate potentials. DFT calculations show essentially pyridyl-imine centred lowest unoccupied molecular
新的四齿酚盐O ^ N ^ N ^ S硫代半碳素(TSC)配体及其Ni(II),Pd(II)和Pt(II)复合物进行了研究。反磁性和正方形平面构型的橙色或红色络合物在非常中等的电势下显示出可逆的还原电化学,部分显示出可逆的氧化电化学。DFT计算显示,基本上以吡啶基-亚胺为中心的最低未占据分子轨道(LUMO),而最高占据分子轨道(HOMO)受酚盐部分,金属d轨道和TSC硫醇盐原子的贡献,与UV-vis光谱电化学保持一致。DFT计算结合红外光谱显示了分子结构的详细信息,通过TD-DFT计算以非常高的准确性对UV-vis吸收进行了建模。UPS与紫外可见吸收和TD-DFT计算数据完全一致,并且显示出Pd> Pt> Ni系列的HOMO-LUMO间隙减小。