A. O. Bulanov

A new ligand system based on 7′-hydroxy-3-methyl-8′-formyl-3,4-dihydro-2H-1,3-benzoxazine-2-spiro-2(H)-chromene Ferrocenoylhydrazone

Spiropyrans are the class of organic photochromes [1–3] whose photochemical properties may be varied by introducing different substituents in the molecule, including the coordinatively active ones. The structural and chemical properties of the obtained derivatives suggest their potential photochemical activity and the ability to form the heteronuclear complexes containing coordination node with the predicted structure and parameters of the exchange interaction.

Binuclear Copper(II) Complexes with Hydrazones Containing Spiropyran Fragment

New hydrazones were prepared by the reaction of new spiropyran of benzoxazine series and aliphatic acid hydrazides; their binuclear complexes were synthesized.

New binuclear copper(II) complexes with bishydrazones derived from spiropyran of the benzoxazinonium series

New bishydrazones were prepared from a photochromic spiropyran of the benzoxazinonium series, containing free functional groups in the 2[H]-chromene moiety. This bishydrazones form binuclear complexes with copper(II) ions. The structure of these complexes was studied by ESR spectroscopy and magnetic measurements. The magnetochemical study revealed antiferromagnetic exchange coupling in the complexes.

Investigation of complexation of functionalized 1,3-benzoxazinone spiropyrans with metal ions

For the first time, complexation between the metal ions and the molecules of photochromic benzooxazine spiropyrans was found and studied. The observed spectral-kinetic changes are explained by the complex formation between molecules of the merocyanine type, resulted from the dissociation of -C-O- bonds, and by electrostatic interaction between complex components depending on the compound structure and the metal ion nature.

Synthesis of new spiropyranes and study of the effect of the nature of substituents on their photochromism and complexation

A series of new hydrazones based on 3,3-dimethyl-7-hydroxy-8-formyl-[2H]-1-benzopyran-2,1-[2]-oxaindane] with the substituents of different nature in the hydrazone moiety was synthesized. A comparative study of photochromism and complexation of the synthesized spiropyrans with a number of metal cations was carried out. Spectral and kinetic differences in photochromism and complexation of these compounds were revealed.

Synthesis, photochromic properties, and complex formation with metal ions of hydrazones based on a spiropyran of oxaindane series

A series of hydrazones based on a new spiropyran oxaindane series was synthesized. The compounds were found to possess photochromism and are characterized by a high rate of spontaneous decoloration of their photoinduced merocyanine form. Dark and photoinduced formation of complex compounds in the reaction of metal ions with molecules of the hydrazones in solution was observed.