A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 14187-32-7, Name is Dibenzo-18-crown-6, molecular formula is C20H24O6. In a Conference Paper，once mentioned of 14187-32-7, Product Details of 14187-32-7
This work reports the synthesis and luminescence behavior of the diaquatris(thenoyltrifluoracetonate)europium(III) with dibenzo18-crown-6 (DB18C6) and 18-crown-6 (18C6), in the solid state. The new compounds Eu(TTA)3(H2O)2(DB18C6)2 and Eu(TTA)3(H2O)2(18C6)2 were characterized by elemental analysis, infrared spectroscopy, thermalanalysis and scattering electronic microscopy. The emission spectra show narrow emission bands that arise from the 5D0?7FJ transitions (J=0-4) of the Eu3+ ion. The spectral data of the Eu(TTA)3(H2O)2(DB18C6)2 and Eu(TTA)3(H2O)2(18C6)2 compounds present, respectively, one and two peaks assigned to the 5D0?7F0 transition (?578nm), suggesting one and two sites of symmetry around the metal ion. In addition, the luminescence decay curves of these DB18C6 and 18C6 systems were better fitted by a mono- and bi-exponential decays, respectively. The values of the experimental intensity parameters (Omegalambda) indicate that the europium ion in the complexes is in a highly polarizable chemical environment. The values of emission quantum efficiencies for the two Eu(III)-supramolecular compounds are similar (eta=26%).
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Product Details of 14187-32-7. In my other articles, you can also check out more blogs about 14187-32-7