Comparisons on isomeric 1,10-phenanthroline aromatic heterocyclic derivatives with triphenylamine and thiophene donors before and after rhenium(I) carbonyl complexation
作者:Yu-Xin Peng、Dan Xu、Na Wang、Tao Tao、Bin Hu、Wei Huang
DOI:10.1016/j.tet.2016.04.061
日期:2016.6
We have described herein a series of unsymmetric 1,10-phenanthroline (phen) based aromatic heterocyclic derivatives with triphenylamine (TPA) and thiophene donors (L1–L5) and their respective neutral tricarbonyl rhenium(I) complexes (6a–6e). Comparisons between isomeric compounds L1/L2 and 6a/6b as well as L3/L4/L5 and 6c/6d/6e have been made on their 1H NMR and UV/Vis spectra, single-crystal structures
我们在这里描述了一系列具有三苯胺(TPA)和噻吩供体(L1 - L5)及其各自中性三羰基rh(I)配合物(6a - 6e)的基于不对称1,10-菲咯啉(phen)的芳香族杂环衍生物。之间的比较异构体化合物L1 / L2和6A / 6B以及L3 / L4 / L5和6C / 6D / 6E已经对他们的1H NMR和UV / Vis光谱,单晶结构和密度函数理论(DFT)计算。由引入2-,3-或3,8-取代的TPA和phen的噻吩基团引起的整个分子共轭体系的改变是这些结构异构体的结构和光谱差异的原因。特别是,在苯酚的两个位置(L1和L3)引入TPA和/或噻吩供体比其各自的3个取代的异构体(L2和L4)产生的带隙更小)。此外,rh离子络合可以略微降低分子系统的最高占据分子轨道(HOMO)能级,但会显着降低分子系统的最低未占据分子轨道(LUMO)能级。