Further Insights into the Impact of Ligand-Localized Excited States on the Photophysics of Phenanthroline-Based Rhenium(I) Tricarbonyl Complexes
作者:Joanna Palion-Gazda、Katarzyna Choroba、Mateusz Penkala、Patrycja Rawicka、Barbara Machura
DOI:10.1021/acs.inorgchem.3c03894
日期:2024.1.15
present work shows the pivotal role of N-donor substituents attached to 1,10-phenanthroline at the 4,7-positions in perturbation of ground- and excited-state properties of fac-[ReCl(CO)3(R2phen)]. Excited-state processes occurring upon photoexcitation in the designed systems were thoroughly explored with a wide range of steady-state and time-resolved spectroscopic techniques, including transient absorption
目前的工作表明,在fac -[ReCl(CO) 3 (R 2 phen) 的基态和激发态性质的扰动中,连接到 1,10-菲咯啉 4,7 位的 N 供体取代基的关键作用]。利用各种稳态和时间分辨光谱技术(包括瞬态吸收)彻底探索了设计系统中光激发时发生的激发态过程,并且基于密度泛函理论的理论研究对实验结果进行了补充。密度泛函理论)。结果表明,六元杂环胺(哌啶─ppr、吗啉─mor和硫代吗啉─tmor)的连接是延长所产生的fac -[ReCl(CO) 3 ( R 2 phen)]归因于位于菲咯啉基配体上的激发态的贡献。这些系统的吸收和发射特性均归因于构型混合的 MLCT/IL 激发态。具有吩恶嗪 (pxz) 和吩噻嗪 (ptz) 取代基的 Re(I) 络合物被证明具有电荷分离的激发态,瞬态吸收中同时存在 phen – * 和 pxz + * 或 ptz + * 典型信号清楚地证明了这一点光谱。这