This type of reactivity has quickly become one of the cornerstones of modern catalysis .In a patent, category: chiral-oxygen-ligands, name is 1,5-Diphenylpenta-1,4-dien-3-one, belongs to chiral-oxygen-ligands compound, introducing its new discovery. category: chiral-oxygen-ligands
Nature and characterization of the singlet and triplet excited states of the dibenzylideneacetone and di-3-(N-ethylcarbazoylidene)acetone bridging ligands
The lowest energy singlet state in di-3-(N-ethylcarbazoylidene)acetone (dNECa), a luminescent model compound at room temperature for dibenzylidenecacetone (dba), has been assigned to a charge transfer (CT) state using the medium polarity effect on lambdamax(F) and fluorescence polarized spectra of dNECa at 77 K.The dNECa fluorescence quantum yields (phiF) and lifetimes (tauF) are solvent sensitive where both phiF and tauF tend to increase with polarity.The very weak and moderately structured phosphorescences have been located for the first time for both dba and dNECa in the 550-800 nm range and are also assigned to a CT state.In this case the CT interactions are less pronounced than lambda(0-0)P and taup are much less solvent sensitive.Finally, EHMO type calculations confirm that the CT transition is the lowest energy transition in dba and di-3-(N-methylindoylidene)acetone (a model compound for dNECa), but also suggest that the n?* state must lie near the CT state in dba.
However, they have proven to be challenging because of the mutual inactivation of both catalysts. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 538-58-9
Reference：
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate