Tris complexes of Ln3+ ions (Ln = La, Ce, Pr) with triphenyl-substituted cyclopentadienyl ligands were studied by optical spectroscopy. Emission both 5d - 4f and transitions was observed for Pr3+ complex. It found that the strength crystal field formed in tris is comparable to case sulfides, as a result, red luminescence Ce3+ compound. The quantum yield photoluminescence 20% latter.

Ab s t r a c t . The effect of organic-metallic compounds including lead, (C6H5)3PbCl, and tin, (C6H5)3SnCl, on cucumber leaves and green algae Scenedesmus quadricauda were studied. Both compounds, in concentration of 2 μmol dm, caused increased emission of ultra weak chemiluminescence (UCL) of cucumber leaf discs after 20 hours of treatment, and activity of tin triphenyl chloride was stronger ...

Through a diffusion reaction, cuprous bromide, triphenyl-phosphane and 1,3-bis-(pyridin-4-yl)propane (bpp) were self-assembled to form the one-dimensional title compound, [Cu(2)Br(2)(C(13)H(14)N(2))(C(18)H(15)P)(2)](n). Each Cu(I) atom is coordinated by two Br atoms, one P atom from a triphenyl-phosphane ligand and one N atom from a bpp mol-ecule in a distorted tetra-hedral geometry. Two μ(2)-B...

Reaction of ethyl (Z)-3-(heteroaryl/aryl)-2-((triphenyl-λ5-phosphaneylidene) amino) acrylates intermediates with 2,3-thiophenedicarboxaldehyde was used in novel Tandem three consecutive reactions: aza-Wittig, imine condensation and electrophilic heteroaromatic cyclization to obtain a series indolizines. A tentative mechanism this reaction is proposed.