Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 15746-57-3, Name is Cis-Dichlorobis(2,2′-bipyridine)ruthenium(II), COA of Formula: C20H16Cl2N4Ru.
Photochemical, photophysical and redox properties of novel fulgimide derivatives with attached 2,2?-bipyridine (bpy) and [M(bpy) 3]2+ (M = Ru and Os) moieties
Fulgimides monosubstituted with [M(bpy)3]2+ (M = Ru, Os; bpy = 2,2?-bipyridine) chromophore units and with a single bpy group were synthesized and investigated as components of conceivable dinuclear photochromic switches of luminescence. The E-, Z- and closed-ring (C) photoisomer forms of the bpy-bound fulgimide were successfully separated by semi-preparative HPLC. The same procedure failed, however, in the case of the [M(bpy)3]2+-substituted fulgimides. Energy transfer from the excited photochromic unit to the metal-bpy centre competes with the fulgimide cyclization, reducing the photocyclization quantum yields by approximately one order of magnitude compared to the non-complexed fulgimide-bpy ligand (phiEC = 0.17, phiEZ = 0.071, phiZE = 0.15 at lambdaexc = 334 nm). The cycloreversion of the fulgimide-bpy ligand is less efficient (phiCE = 0.047 at lambdaexc = 520 nm). The intensity of the 3MLCT-based luminescence of the metal-bpy chromophore (in MeCN, phideaer = 6.6 ¡Á 10-2 and taudeaer = 1.09 mus for Ru; phideaer = 6.7 ¡Á 10-3 and taudeaer = 62 ns for Os) is not affected by the fulgimide photoconversion. These results and supporting spectro-electrochemical data reveal that the lowest triplet excited states of the photochromic fulgimide moiety in all its E-, Z- and closed-ring forms lie above the lowest 3MLCT levels of the attached ruthenium and osmium chromophores. The actual components are therefore unlikely to form a triad acting as functional switch of energy transfer from [Ru(bpy)3]2+ to [Os(bpy)3]2+ through the photochromic fulgimide bridge. The Royal Society of Chemistry 2009.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.COA of Formula: C20H16Cl2N4Ru. In my other articles, you can also check out more blogs about 15746-57-3
Reference£º
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI