Light-Induced Geometrical Changes in Acyclic Ruthenium(II) Complexes and Their Ruthena−Macrocyclic Analogues
作者:Sylvestre Bonnet、Jean-Paul Collin、Jean-Pierre Sauvage
DOI:10.1021/ic700734q
日期:2007.12.1
The two ligands 1 (4'-(3-anisylphenyl)-2,2';6',2' '-terpyridine) and 2 (2-mesityl-8-anisyl-1,10-phenanthroline) (Scheme 2) were synthesized and coordinated to ruthenium. The corresponding complexes Ru(1)(2)(L)n+, where L = Cl-, CH3CN, or C5H5N, have been fully characterized. Notably, the hindering mesityl group of the phenanthroline ligand was shown to lie opposite to the monodentate ligand L both
两种配体1(4'-(3-茴香基苯基)-2,2'; 6',2''-叔吡啶)和2(2-间甲1-8-茴香基-1,10-菲咯啉)(方案2)合成并与钌配合使用。相应的配合物Ru(1)(2)(L)n +(其中L = Cl-,CH3CN或C5H5N)已得到充分表征。值得注意的是,在溶液和固态中,菲咯啉配体的受阻均一基团都与单齿配体L相反。在乙腈或吡啶中辐照后,发生了络合物的定量异构化,该异构化由二齿螯合物旋转90度组成。在新的异构体中,均表明异丁基被π堆积到配位的单齿配体上,而苯酚(1,10-菲咯啉)的茴香基位于钌原子的另一侧。通过在DMSO中加热配合物的光化学异构体并用氯离子,乙腈或吡啶交换DMSO来进行逆反应。使用钌(II)-吡啶键的稳定性是为了将Ru(terpy)(phen)基序铭刻在分子环中。在Ru(1)(2)(C5H5N)2+的两个异构体上进行配体的功能化和随后在复合物上的环化反应。获得并表征