Ruthenium(II) 2,2'-Bipyridyl Tetrakis Acetonitrile Undergoes Selective Axial Photocleavage
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- 作者：Agustí ; n Petroni ; Leonardo D. Slep ; Roberto Etchenique
- 刊名：Inorganic Chemistry
- 出版年：2008
- 出版时间：February 4, 2008
- 年：2008
- 卷：47
- 期：3
- 页码：951 - 956
- 全文大小：194K
- 年卷期：v.47,no.3(February 4, 2008)
- ISSN：1520-510X
文摘
The complex [Ru(bpy)(AN)4]2+ (bpy = 2,2'-bipyridyl, AN = acetonitrile) has a Ru(II) 
*bpy MLCT band at 388nm. Upon irradiation on this absorption band, the compound undergoes total regioselective photocleavage yieldingcomplexes fac-[Ru(bpy)(AN)3(H2O)]2+ and trans-[Ru(bpy)(AN)2(H2O)2]2+ in two consecutive steps with quantum yieldsof 0.43 and 0.09, respectively. This behavior is a consequence of the stronger 
-donor ability of the bpy nitrogensthat determines the orbital ordering and therefore the nature of the lowest lying 3d-d state responsible for thephotochemistry. The two-step photoreaction, which can be followed by UV-vis and NMR spectra, provides aquantitative path to the preparation of trans-polypyridine species with potentially interesting photochemical properties.
*bpy MLCT band at 388nm. Upon irradiation on this absorption band, the compound undergoes total regioselective photocleavage yieldingcomplexes fac-[Ru(bpy)(AN)3(H2O)]2+ and trans-[Ru(bpy)(AN)2(H2O)2]2+ in two consecutive steps with quantum yieldsof 0.43 and 0.09, respectively. This behavior is a consequence of the stronger -donor ability of the bpy nitrogensthat determines the orbital ordering and therefore the nature of the lowest lying 3d-d state responsible for thephotochemistry. The two-step photoreaction, which can be followed by UV-vis and NMR spectra, provides aquantitative path to the preparation of trans-polypyridine species with potentially interesting photochemical properties.