In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 1660-93-1, name is 3,4,7,8-Tetramethyl-1,10-phenanthroline, introducing its new discovery. Product Details of 1660-93-1
We report the synthesis of phosphorescent divalent osmium complexes of the form [Os(N-N)2(L-L) or Os(L-L)2(N-N)]2+ (PF6)2 where N-N is a derivative of 1,10-phenanthroline, and L-L is a diarsine or diphosphine ligand: 1,2-bis(dimethylphosphino)ethane, 1,2-bis(dicyclohexylphosphino)ethane, or 1,2-bis(dimethylarseno)benzene. X-ray structures have been determined, luminescent and electrochemical properties have been measured and DFT calculations have been performed on the complexes. The emission lifetime of complexes of structure Os(II)(L-L)2(N-N) are longer than the those of Os(II)(N-N)2(L-L). The DFT calculations show that there is significant mixing of the pi-pi* into the dpi-pi* charge-transfer state for the complexes of the form Os(II)(L-L)2(N-N) resulting in a longer lived excited state. Through DFT calculations we were able to conclude that the HOMO of the complexes is a d orbital on the osmium while the LUMO is the b1(psi) pi* system of the phenanthroline. However, we found that the HOMO did not have the correct symmetry to enable strong charge transfer to the phenanthroline to be observed, and the strong MLCT transition observed in the spectra is the metal d HOMO(-1) to the b1 pi* LUMO of the phenanthroline.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 1660-93-1 is helpful to your research. Product Details of 1660-93-1
Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI