TY  - GEN
AU  - Аксенова,Юлия Викторовна
AU  - Овчинников,Дмитрий Сергеевич
AU  - Кузнецова,Римма Тимофеевна
AU  - Бумагина,Наталья Анатольевна
AU  - Прокопенко,Александр Анатольевич
TI  - Физико-химические свойства дипиррометенатов d-элементов и перспективы их применения
KW  - дипиррометены
KW  - хромофорные соединения
KW  - экспериментальные данные
KW  - физико-химические исследования комплексов
KW  - статьи в сборниках
N1  - Библиогр.: 4 назв
N2  - 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
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