This article presents findings on the synthesis and crystal structure analysis of 5-nitro-4-(4-methoxyphenoxy)phthalonitrile. The crystal structure was meticulously refined using X-ray diffraction techniques, which allowed for a detailed examination of the molecular arrangement within the crystal. The manuscript elaborates on the significant intermolecular and intramolecular interactions that contribute to the overall crystal packing, highlighting how these interactions influence the stability and properties of the material.

Zeolite-like frame materials based on 2-ethylimidazolate of cobalt (II), iron (III) terephthalate and cobalt (II) terephthalate were synthesized using the direct mixing method and the solvothermic method. The obtained materials are characterized using a wide range of physico-chemical analysis methods. IR spectroscopy allowed us to obtain reliable conclusions about the formation of a metal-linker bond, which confirms the formation of coordination bonds in the organometallic framework for all synthesized samples. The formation of a pure phase of synthesized frame structures was established, which was recorded using the method of X-ray phase analysis. Characteristic peaks in the range from 8 degrees to 32 degrees, were observed on the X-ray images of all samples, the relative intensity and local location of which prove the formation of the pure phase of the corresponding ethylimidazolates and terephthalates. The study of the morphology of the materials showed that the samples are quite highly dispersed heterogeneous systems. The average particle size for a material based on 2-ethylmidazolate of cobalt (II) was 0.5-1 mu m. Materials obtained by direct mixing are characterized by a spherical particle shape, while samples obtained by the solvothermic method are characterized by a cubic particle shape. For materials based on iron (III) and cobalt (II) terephthalates, the average particle size was 0.15-0.25 mu m. The individual particles have the shape of a prism truncated on both sides. The parameters of the porous structure of the synthesized samples were found by the method of low-temperature nitrogen adsorption. The specific surface area (according to the BET method) and the pore volume are calculated for all materials. The specific surface area for different samples varies from 520 to 1100 m(2)/g. A sufficiently wide range of surface areas is due to the varying degree of aggregation when the ligand/metal ratio changes during synthesis. The results of physico-chemical studies of the structural and surface characteristics of synthesized samples confirm the fundamental possibility of their use as sorbents, in particular for the extraction of rare earth metal ions.

This paper presents the results of obtaining new cobalt and zinc complexes based on dicyanophenoxy-substituted carboxypthalocyanine. The original method of synthesis and isolation of the compound is shown; its spectroscopic and photophysical characteristics are studied. Studies show the absence of aggregation processes in organic media for solutions of complexes in working concentration ranges. This shows the possibility of the practical application of structures as catalysts. The high catalytic activity of cobalt complexes with dicyanophenoxy-substituted carboxyphthalocyanine ligand in the conversion reaction of sodium diethyldithiocarbamate to disulfiram, which is an active component of drugs for the treatment of alcohol dependence, is determined.

1-[4-(4-Methoxyphenyl)azo]naphthol was synthesized using diazotization and azo coupling reactions. The compound was used as a nucleophile to prepare 3- and 4-[(4-methoxyphenylazo)-4-naphthoxy]phthalonitriles. The corresponding metal complexes of phthalocyanines were synthesized by the template condensation of the resulting substituted phthalonitriles with zinc and magnesium acetates. The influence of the substituent position on the protonation processes and spectroscopic characteristics of metal phthalocyanines was determined. The luminescence properties of the synthesized metal complexes and photosensitization of singlet oxygen were studied.

The structure, antioxidant and neuroprotective properties of lithium comenate (lithium 5-hydroxy-4-oxo-4H-pyran-2-carboxylate) were studied. Lithium comenate was obtained by reacting comenic acid (H2Com) with lithium hydroxide in an aqueous solution. The structure of lithium comenate was confirmed via thermal analysis, mass spectrometry, IR, NMR and UV spectroscopy. The crystal structure was studied in detail via X-ray diffraction. The compound crystallized in a non-centrosymmetric space group of symmetry of the orthorhombic system Pna21 in the form of a hydrate, with three water molecules entering the first coordination sphere of the cation Li+ and one molecule forming a second environment through non-valent contacts. The gross formula of the complex compound was established [Li(HCom)(H2O)3]·H2O. It has been established that lithium comenate has a pronounced neuroprotective activity under the excitotoxic effect of glutamate, increasing the survival rate of cultured rat cerebellar neurons more than two-fold. It has also been found that the pre-stress use of lithium comenate at doses of 1 and 2 mg/kg has an antioxidant effect, which is manifested in a decrease in oxidative damage to the brain tissues of mice subjected to immobilization stress. Based on the data available in the literature, we believe that the high neuroprotective and antioxidant efficacy of lithium comenate is a consequence of the mutual potentiation of the pharmacological effects of lithium and comenic acid.

The work describes the synthesis of non-periphery substituted Zn(II), Mg(II) phthalocyanines complexes obtained from 3-(4-bromophenoxy)phthalonitrile. The influence of the metal complex on the spectral and acid-base properties of the obtained compounds was shown. The quantum yield and fluorescence lifetime of the synthesized metal complexes were determined.

The electrochemical and electrocatalytic behavior of gold electrodes modified with tetra-4-sulfophthalocyaninates of nickel(II) (NiPc) and copper(II) (CuPc) is studied in aqueous alkaline solutions using cyclic voltammetry. The electrocatalytic activity of phthalocyaninates of these metals in the oxidation of hydroxide ions to form molecular oxygen is assessed and compared with the literature data.

The work describes the optimization of the procedure for the synthesis of 4-bromo-2-methoxyphenyldiazenylphenol, which is used as a nucleophile in the presence of 3- and 4-nitrophthalonitriles. The resulting 3-(4-bromo-2-((4-methoxyphenyl)diazenyl)phenoxy)- and 4-(4-bromo-2-((4methoxyphenyl)diazenyl)phenoxy)phthalonitriles were used for template condensation with magnesium or zinc acetate. Methods for isolating and purifying the synthesized compounds are described. The structure and composition were confirmed using IR, 1H NMR and electron spectroscopy. Peripheral functionalization of macrocycle by a conjugate azochromophore fragment gives molecules phthalocyanine with special optical properties. This class of phthalocyanines containing an additional chromophore system in their composition is attractive for potential use not only as pigments and dyes traditional for phthalocyanine compounds, but also as chemical sensors, dyesensitized solar cells and photosensitizers for PDT. The resulting nitriles and phthalocyanine complexes dissolve in chloroforms, toluene, THF, and DMF. The influence of the substituent location on the spectral properties of the obtained metal complexes (Zn, Mg) in organic solvents has been studied. For non -peripherally substituted metal phthalocyanines, acid -base properties are studied. To observe and study the acid -base effect, spectrophotometric titration of the trifluoroacetic acid complex in toluene is used. It is shown that the magnesium complex is more basic than the zinc complex. In this work, the luminescent properties are also studied and the quantum yields of singlet oxygen formation for synthesized complexes in THF are determined. The influence of the substituent location on the quantum yield of fluorescence, as well as on the generation of singlet oxygen, is noted in the work.

This work describes the use of silica particles obtained by sol-gel method as a template for deposition of supramolecular complexes of melamine cyanurate. To obtain SiO2@melamine-cyanurate (SiO2@MCA) material, the method of covalent modification of silica surface by melamine molecules (SiO2-mel) was applied and the method of its further functionalization by hydrogen-bonded organic framework of melamine-cyanurate (HOF, MCA) was proposed. One of the promising directions of using SiO2@melamine-cyanurate is obtaining the SiO2@g-C3N4 material based on it. Control of the amount of applied melamine-cyanurate allows one to potentially obtain g-C3N4 layers of different thicknesses on the silica surface.

The electrochemical properties of vitamin B6 have been studied. Its analytical signal was obtained using a gold electrode modified with cobalt(II) tetra-4-sulfophthalocyaninate. The optimum experimental conditions were determined. A technique for immobilizing the modifier on the surface of the gold electrode is proposed. The mechanism of vitamin B6 oxidation on the electrode was examined.

Synthesis of unsymmetrically substituted 2,3,7,13,16,17,22,23-octamethyl-8,12-di-[Formula: see text]-butylsapphyrin dichloride (H 5 P[Formula: see text]Cl[Formula: see text] was carried out. The synthesized compound was identified by electron absorption, 1 H NMR spectroscopy, and mass spectrometry. The stability of the anionic complex and the acidic properties of H 5 P[Formula: see text]Cl 2 were studied by spectrophotometric titration. The parameters of the electronic absorption spectra and the concentration range for the existence of deprotonated forms, as well as their acid dissociation constants, are determined. The geometric structure and electronic structure of the molecular and ionic forms of the resulting sapphyrin were calculated in terms of the density functional theory (B3LYP/Def2TZVPP with an empirical correction for GD3 dispersion). The calculations showed good agreement with the experimental data.

The review presents a generalization of research on the chemistry of solutions and mate-rials based on linear and cyclic polypyrrole compounds carried out at the Department of Inorgan-ic Chemistry of the Ivanovo State University of Chemistry and Technology. The review focuses on key areas related to synthetic approaches to the preparation of boron complexes with pyrrole de-rivatives, as well as complexes of a wide range of metals of the periodic system with substituted derivatives of the phthalocyanine ligand. Spectroscopic, luminescent, acid-base properties of syn-thesized compounds and their practical application in sensor systems are considered separately. In addition, the possibilities of obtaining hybrid and functional materials, including derivatives of borondipyrrins and tetrapyrrole macroheterocyclic compounds, which have increased catalytic and biological activity in liquid-phase processes are shown.

The electrochemical behavior of tetra-4-[4-(2,4,5-trichlorophenoxy)]phthalocyaninates of cobalt(II) (CoPc) and copper(II) (CuPc) in N,N-dimethylformamide with 0.1 M nBu4NBF4 as a supporting electrolyte is studied by cyclic voltammetry. It is shown experimentally that both metal complexes are capable of irreversible reduction. In this case, the reverse CV-scan for CoPc demonstrates an oxidation peak which is absent in the anodic scan and corresponds to the cathodic reaction product. The metal complexes themselves are not oxidized under these conditions.

A method for the synthesis of Fe(III)-based zeolite imidazolate framework at various metal to linker ratios was proposed. The resulting material was used as an adsorbent for zinc(II) and copper(II) ions. It was shown that the materials were composed of hexagonal particles and represented a microheterogeneous system with an average particle size of 0.05–0.1 μm. The isotherms of nitrogen adsorption in the pores of Fe-ZIF were measured. By processing of the isotherms, porous structure parameters for the samples were found. The adsorption of Cu 2+ and Zn 2+ ions from aqueous solutions at 298.15 K was studied and high degrees of metal extraction was demonstrated. The adsorption of copper and zinc ions was spontaneous in all cases. The highest coverages of the surface active sites were 0.96 and 0.71 for copper and zinc, respectively. The adsorption in the bulk of energetically homogeneous porous adsorbent and predominance of micropores in iron(III) 2-ethylimidazolate structure were established.

In this review, we generalize the research results obtained by Russian scientists in the last 10-15 years for porphyrins, related compounds, and their metal complexes with a pronounced application potential. The main attention is paid to the analysis of relationships between the spectral, catalytic, and sensor properties of tetrapyrrole compounds and the structure of peripheral substituents and axial ligands and the nature of the coordinating metal atom.

4-[4-Bromo-2-(2-phenyldiazenyl)phenoxy]phthalonitrile was obtained by the reaction of 4-nitrophthalonitrile and sodium 4-bromo-2-(2-phenyldiazenyl)phenolate. Magnesium and zinc phthalocyaninates were synthesized by the template condensation of the corresponding metals with phthalonitrile. The luminescence properties and photosensitization of singlet oxygen for the synthesized complexes were studied.

Isomeric 4-[(methoxy)phenoxy]phthadinitriles were obtained and characterized in this work. The compounds showed high thermal stability, which is directly related to their structure. These features were revealed and described using X-ray diffraction analysis. For m-substituted structures during packing, the largest contribution was found from intermolecular interactions of the π-stacking type between nitrile fragments. In the packing of o-substituted analogs, this type of interaction is not realized due to geometry, and additional stabilization is realized due to the appearance of three-center intermolecular bonds between the bridging oxygen atoms of one nitrile molecule and the hydrogen atom of the nitrile fragment of another molecule. Based on the obtained phthalonitriles, novel metal complexes with tetrakis-4-[4-(o-/m-/p-methoxy)phenoxy]phthalocyanine ligands were synthesized. For the substituted phthalocyaninates obtained the structure was characterized, the spectroscopic and luminescent properties were determined, as well as the influence of the position of the methoxy-group in the peripheral fragments on them. It is shown that, on the one hand, the position of the methoxyl-group has a significant effect on the values of the fluorescence quantum yields of the compounds, and, on the other hand, has almost no effect on their fluorescence lifetimes.

The effect of the composition and properties of the mixed water– N , N -dimethylformamide solvent (χ DMF = 0.0–1.0 mole fraction) on changes in the solvated state of cobalt 3(4),10(11),17(18),24(25)-tetrasulfophthalocyaninate (CoTSPc) was studied. The region of electrochemical stability of the CoTSPc–DMF electrolyte system at 25.0°C was determined. The study was performed by the interphase distribution method, electronic absorption spectroscopy, and cyclic voltammetry.

The synthesis of peripherally and non-peripherally substituted complexes of Zn(II), Mg(II), and Er(III) phthalocyanines based on 3(4)-(4-methylphenyldiazenylphenoxy)phthalonitrile was proposed. The effects of the complex-forming metal and the location of the substituent on the spectral properties of the synthesized compounds were shown. The acid-base properties of non-peripherally substituted metal phthalocyanines were studied. The fluorescence quantum yields and lifetimes of fluorescence for the synthesized metal complexes were determined.