Spectral, luminescent, and lasing characteristics of chromene dyes and their julolidine analogs emitting in the red spectral range are investigated experimentally and theoretically. It is shown that the cause for a low lasing efficiency of oxochromene compared with iminochromene is a high intersystem crossing to the T 1 state and the presence of the induced T 1→T n absorption in the region of the luminescence band.

The results from investigating the photophysical properties of new coumarin dyes synthesized and incorporated into Langmuir-Blodgett films are presented. A method for forming monolayers on the surface of a water/air interface is proposed. The phase states of mixed monolayers on a water surface are studied. It is found that mixed monolayers of amphiphilic polyampholyte and dye allow us to obtain more stable and condensed films, relative to films of single components. The spectral and luminescent properties of synthesized dyes in solution and in Langmuir-Blodgett films are studied.

Приведены результаты исследования фотофизических свойств новых синтезированных кумариновых красителей, включенных в пленки Ленгмюра–Блоджетт. Предложена методика формирования монослоев на поверхности раздела фаз вода–воздух. Изучены фазовые состояния смешанных монослоев на поверхности воды. Установлено, что смешанные монослои амфифильного полиамфолита и красителя позволяют получать более стабильные и конденсированные пленки по сравнению с пленками индивидуальных компонентов. Исследованы спектральные и люминесцентные свойства синтезированных красителей в растворе и в пленках Ленгмюра–Блоджетт.

Conjugates of tetrasulphosubstituted zinc phthalocyanine with rhodamine 6G or rhodamine B have been synthesized and characterized to have four rhodamine 6G or average two rhodamine B residues per phthalocyanine molecule. The ionized conjugates (positive charge on the rhodamine part) are non-soluble in water. Photochemical and photophysical measurements, carried out in dimethylsulphoxide, have shown that the main result of conjugation is efficient intramolecular energy transfer from rhodamine to phthalocyanine part of molecular system. The conjugation results in about twofold decrease of quantum yields for photodegradation, fluorescence and singlet oxygen photogeneration.

Spectral and luminescent properties were studied for chemical dimers and molecular aggregates of Nile Red oxazine dye in solutions. Chemical bonding of two oxazine dye molecules leads to the formation of a dimer whose spectral behavior is in close agreement with the exciton model constructed for “physical” molecular aggregates. Chemical dimers luminesce, whereas dimers formed because of van der Waals interactions do not.

A series of conjugates of sulfo- and carboxy-substituted phthalocyanines with rhodamines were prepared, and their electronic absorption and luminescence spectra were studied. An intramolecular transfer of the excitation energy from the rhodamine moiety (donor) to the phthalocyanine moiety (acceptor) was revealed.

The behavior of monolayers of a new synthetic amphiphilic analogue of Nile red at the water/air interface and the spectral-luminescent properties of the dye in solvents with various polarities and of its Langmuir-Blodgett films with stearic acid were studied. According to the electronic absorption spectra, monomers of two types with different spatial conformations were present in the films. The fluorescence band of the films coincided with that of the dye in polar media.

Nitro and amino derivatives of benzo[b]phenoxazine have been synthesized. The spectroluminescence properties of the synthesized compounds are investigated.

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10-Hydroxy-5H-dibenzo(a,i)phenoxazin-5-one and its 6-chloro derivative - condensed derivatives of resorufin, simultaneously containing in the molecule linearly and angularly condensed benzene rings - were synthesized. Their spectral-luminescent properties were investigated.

The synthesis of dibenzo[b,i]phenoxazine, its p-tert-butyl substituted analog, and a series of nitro-, amino-, and bromosubstituted derivatives, is described. The spectral luminescence properties of these newly synthesized compounds have been investigated.

Chloro- and alkoxy-substituted porphyrazines were obtained in the reaction of mono- and dichloromaleo (fumaro)nitriles with metal chlorides or alkoxides. The structures of the synthesized compounds were confirmed by their electronic absorption spectra.

Abstractp‐tert.‐Butylbenzylcyanid (II) entsteht durch Einwirkung von Kaliumcyanid auf das Benzylbromidderivat (I).