LCC (Laboratoire de Chimie de Coordination), CNRS, 205, route de Narbonne, F-31077 Toulouse, France.
Laboratoire de Chimie et Physique Quantiques, Université Paul Sabatier (Toulouse), UMR 5626, 218 route de Narbonne, F-31077 Toulouse, France.
Molecules. 2020 May 8;25(9):2205. doi: 10.3390/molecules25092205.
The photorelease of nitric oxide (NO·) has been investigated in dimethylsulfoxide (DMSO) on two compounds of formula Ru(R-tpy)(bpy)(NO), in which bpy stands for 2,2'-bipyridine and R-tpy for the 4'--2,2':6',2″-terpyridine with R = H and MeOPh. It is observed that both complexes are extremely sensitive to traces of water, leading to an equilibrium between [Ru(NO)] and [Ru(NO)]. The photoproducts of formula Ru(R-tpy)(bpy)(DMSO) are further subjected to a photoreaction leading to a reversible linkage isomerization between the stable Ru-DMSO (sulfur linked) and the metastable Ru-DMSO (oxygen linked) species. A set of 4 [Ru(R-tpy)(bpy)(DMSO)] complexes (R = H, MeOPh, BrPh, NOPh) is investigated to characterize the ratio and mechanism of the isomerization which is tentatively related to the difference in absorbance between the Ru-DMSO and Ru-DMSO forms. In addition, the X-ray crystal structures of Ru(tpy)(bpy)(NO) and Ru(MeOPh-tpy)(bpy)(DMSO) are presented.
在二甲基亚砜（DMSO）中研究了两个化学式为[Ru(R-tpy)(bpy)(NO)]（PF）的化合物的一氧化氮（NO·）的光释放，其中 bpy 代表 2,2'-联吡啶，R-tpy 代表 4'--2,2':6',2″-三联吡啶，其中 R = H 和 MeOPh。观察到这两个配合物对痕量水非常敏感，导致[Ru(NO)]和[Ru(NO)]之间达到平衡。化学式为[Ru(R-tpy)(bpy)(DMSO)]（PF）的光产物进一步进行光反应，导致稳定的 Ru-DMSO（硫键合）和亚稳 Ru-DMSO（氧键合）物种之间的可逆键异构化。研究了一组 4 个[Ru(R-tpy)(bpy)(DMSO)]配合物（R = H、MeOPh、BrPh、NOPh），以表征异构化的比例和机制，该异构化机制与 Ru-DMSO 和 Ru-DMSO 形式之间的吸光度差异有关。此外，还呈现了[Ru(tpy)(bpy)(NO)]（PF）和[Ru(MeOPh-tpy)(bpy)(DMSO)]（PF）的 X 射线晶体结构。
