Tatiana P. Gerasimova, Aisylu R. Sirazieva, Sergey A. Katsyuba, А. А. Калинин, Liliya N. Islamova, G. M. Fazleeva, Alexey A. Shustikov, A. G. Shmelev, Alexey B. Dobrynin, Оleg G. Sinyashin,
The photophysical properties of a series of D-π-A chromophores, where D is represented by di- or trialkylaniline moiety, π – vinylene, A - quinoxaline, quinoxalinone, quinoline, benzothiazole and thiophenecarboxaldehyde, have been analyzed upon acidification. In all cases, appearance of the second emission band is associated with protonation of the nitrogen atom in the donor fragment. Nevertheless, the simultaneous appearance of two emission bands at equal amounts of acid is observed only for dyes with ...
Tópico(s): Photochemistry and Electron Transfer Studies
2022 - Elsevier BV | Dyes and Pigments
Liliya N. Islamova, А. А. Калинин, Alexey A. Shustikov, Guzel M. Fazleeva, Adel I. Gaysin, A. G. Shmelev, A. E. Simanchuk, Nikita I. Shalin, Anastasiya V. Sharipova, Olga B. Babaeva, Tatyana A. Vakhonina, Olga D. Fominykh, Ayrat R. Khamatgalimov, Sergey L. Mikerin, Marina Yu. Balakina,
Impact of π-deficient heterocyclic core (A′) in conjugated bridge of D-π-A′-π-A chromophores (D = N,N-dihexylaniline, A = tricyanofuran derivative) on optical and thermal properties has been investigated. Three new chromophores with vinyl-hetaryl-vinyl bridges containing π-deficient benzoazine moiety (quinoxaline, quinoxalinone and quinoline) have been synthesized along with new chromophores with vinyl-thiophene-vinyl bridge containing π-excessive heterocycle and short vinylene bridge, and their properties ...
Tópico(s): Luminescence and Fluorescent Materials
2023 - Elsevier BV | Dyes and Pigments
А. А. Калинин, Alexey A. Shustikov, Liliya N. Islamova, Alina I. Levitskaya, D. N. Petrov, Guzel M. Fazleeva, Alfira A. Valieva, Anastasiya V. Sharipova, A. E. Simanchuk, Alexey B. Dobrynin, А.Т. Губайдуллин, A. G. Shmelev, Olga B. Babaeva, Tatyana A. Vakhonina, Ayrat R. Khamatgalimov, Sergey L. Mikerin, Marina Yu. Balakina,
D-π-A chromophores based on novel macroacceptors − fused azinylmethylenemalononitriles (fused azine = pyrido[2,3-b]pyrazine, quinoline, quinoxaline and quinoxalin-2-one) − have been synthesized and their linear and nonlinear optical properties in gas, solution and in poled PMMA-based films have been investigated by DFT, UV-vis and second harmonic generation technique. The transition from chromophores with an azine acceptor to ones with azinylmethylenemalononitrile acceptors leads to a 10-fold increase ...
Tópico(s): Photochromic and Fluorescence Chemistry
2024 - Elsevier BV | Dyes and Pigments