P. Piotrowiak et al., NOVEL LIGANDS FOR ELECTRON-TRANSFER TRANSITION-METAL COMPLEXES, Bulletin of the Polish Academy of Sciences. Chemistry, 42(4), 1994, pp. 445-453
The synthesis of 4,5-diazospirobifluorene and 4,5-diazobifluorenyliden
e, the first two members of a new family of transition metal ligands d
esigned for the study of intramolecular electron and excitation transf
er is reported. The description of the synthesis and the H-1-NMR assig
nments are provided. The UV-VIS and fluorescence spectra of the new li
gands, together with a brief discussion of their electronic properties
are included.