Synthesis, spectral-luminescent properties and photostability of Zn(II) complexes with dipyrrins modified at the periphery and at the meso-spacer

Abstract

A comparative analysis was carried out of spectral-luminescent properties of homoleptic chelates of zinc(II) with dipyrrins containing a methyne group or a nitrogen atom as meso-spacer and four methyl or aryl substituents in the pyrrole rings. It was shown that the zinc dipyrrinates substituted at pyrrole rings with methyne spacer possess intense fluorescence in non-polar media. The fluorescence intensity of phenyl-substituted complex is much higher than that of the methyl-substituted analogue. Replacing the methyne spacer on the nitrogen atom causes a significant (up to 64 nm) red shift of the electron absorption spectra and the complete loss of the fluorescence ability of the chelate. The peculiarities of the influence of the molecular structure of chelating ligands on photostability of zinc(II) complexes have been elucidated.

How to Cite
Dudina, N. A.; Nikonova, A. Yu.; Antina, Ye. V.; Berezin, M. B.; Vyugin, A. I. Chem. Heterocycl. Compd. 2014, 49, 1740. [Khim. Geterotsikl. Soedin. 2013, 1878.]

For this article in the English edition see DOI 10.1007/s10593-014-1426-2