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Библиогр.: 4 назв.

The dipyrromethenes dyes possess optimal spectral characteristics. Well known dipyrromethene boron fluorinated
complexes, also known as BODIPY, are effective fluorophores. These chromophores exhibit high fluorescence quantum
yield, good photostability and solubility in many organic solvents. In comparison with BODIPYs, dipyrromethene
chelates of d-block metals have an advantage of easier self-assembling under mild conditions and high sensitivity of
their spectroscopy to the solvent, properties that favor their practical application. Dipyrromethene derivatives have wide
applications as active laser media, optical labels in biochemistry and medicine, sensitizers for solar cells, fluorescent
sensors, molecular photonic wires, and electron-transfer reagents.
To successfully create a specific optical device requires knowledge of the relationship of physico-chemical properties
with the structure of molecules. Therefore, the purpose of this work was to investigate the spectral-luminescent and
photochemical characteristics of new dipyrromethene complexes with Zn (II) and Cd (II) depending on the structure of
complexes, solvent type, and phase state of their environment for subsequent analysis and elaboration of
recommendations on the purposeful formation of these compounds for specific optical devices.
According to experimental data, the spectral characteristics of absorption and emission of the dipyrromethenes with delements
are determined by the structure of the ligand. Their amount in the chelate affects the absorption coefficient.
The replacement of the central atom boron(III) by zinc(II) or cadmium (II) not only causes a twofold increase in the
number of coordinated chromophoric ligands, but also adds to nonplanarity of the chelates, resulting in a decrease in the
fluorescence yield. The introduction of halogen atoms as substituents instead of alkyl groups into ligands increases the
intersystem crossing and phosphorescence yields (the heavy atom effect). The phosphorescence intensity dependence on
oxygen concentration was established. The obtained Stern-Volmer dependencies for phosphorescence quenching have a
linear region and can be used for determining the concentration of oxygen into gas mixture.