3-Ethyl-lumiflavin was characterized by a variety of methods. Laser flash photolysis measurements in methanol solutions yielded a triplet state living 9.5 ms and a radical species living 91mi s, with steady-state photolysis quantum yields below 10-5. Fluorescence life time of 4.5 ns and quantum yield of 0.16 was recorded in aqueous solu tions. Crystal structure determined by X-ray diffraction was quite similar to the geometry of an isolated molecule calculated using the DFT approach, with the observed differences attributable to a non linear hydrogen bond existing in the crystal solid. EI mass spectra revealed a fragmentation path specific to this compound and in existent in lumiflavin or other similar compounds, due to ejection of a C2H5-N=C=O molecule, containing the ethyl substituent of the parent molecule.
27 unknown N-(E)-stilbenyloxyalkylcarbonyl- and N-(E)-stilbenyloxyalkylcarbonylaminoalkylcarbonyl- substituted hydrazones of ortho, meta and para hydroxybenzaldehydes were prepared. From (1)H-NMR(inDMSO-d-6) was established that the N-substituted hydrazones occurred as E geometrical isomers and cis/trans amide conformers.
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.