New luminophors based on the binuclear helicates of d-metals with bis(dipyrrin)s

Авторы публикации: 
Elena V. Antina, Rimma T. Kuznetsova, Lubov A. Antina, Galina B. Guseva, Natalia A. Dudina, Anatolij I. V'yugin, Alexey V. Solomonov
Dyes and Pigments
Год публикации: 

The review highlights recent advances devoted to new luminophores based on d-metal complexes of bis(dipyrrin)s of [M2L2]. The [M2L2] helicates possess intense absorption in a visible spectrum region. The [Zn2L2], [Cd2L2] and [Hg2L2] helicates are fluorophores with the most intense fluorescence in nonpolar solvents. The fluorescence of [M2L2] bis(dipyrrinate)s decreases by two-fold in aromatic solvents and becomes close to zero in electron-donor media. The fluorescence is increased in a series of 2,2/-, 2,3/-, 3,3/-bis(dipyrrinate)s with similar complexing agent and in a series of [Hg2L2], [Cd2L2], [Zn2L2] complexes with the same ligand. Upon freezing and cooling of [Zn2L2] in ethanol from 300 to 77 K the fluorescence quantum yield of [Zn2L2] is increased up to 100 times. The [Zn2L2] complexes are able to generate the stimulated emission induced at the 550-560 nm region in nonpolar solvents upon excitation by second harmonic Nd:YAG laser.

Гусева Галина Борисовна