Synthesis of 5-(Aryl)amino-1,2,3-triazole-containing 2,1,3-Benzothiadiazoles via Azide-Nitrile Cycloaddition Followed by Buchwald-Hartwig Reaction.

An efficient access to the novel 5-(aryl)amino-1,2,3-triazole-containing 2,1,3-benzothiadiazole derivatives has been developed. The method is based on 1,3-dipolar azide-nitrile cycloaddition followed by Buchwald-Hartwig cross-coupling to afford the corresponding -aryl and ,-diaryl substituted 5-amino-1,2,3-triazolyl 2,1,3-benzothiadiazoles under NHC-Pd catalysis. The one-pot diarylative Pd-catalyzed heterocyclization opens the straightforward route to triazole-linked carbazole-benzothiadiazole D-A systems.

Heterobimetallic Ru(II)/M (M = Ag, Cu, Pb) Complexes as Photosensitizers for Room-Temperature Gas Sensing.

This work is devoted to the investigation of heterobimetallic Ru(II) complexes as photosensitizers for room-temperature photoactivated InO-based gas sensors. Nanocrystalline InO was synthesized by the chemical precipitation method. The obtained InO matrix has a single-phase bixbyite structure with an average grain size of 13-14 nm and a specific surface area of 72 ± 3 m/g.

Nanocrystalline SnO Functionalized with Ag(I) Organometallic Complexes as Materials for Low Temperature HS Detection.

This paper presents a comparative analysis of HS sensor properties of nanocrystalline SnO modified with Ag nanoparticles (AgNPs) as reference sample or Ag organic complexes (AgL1 and AgL2). New hybrid materials based on SnO and Ag(I) organometallic complexes were obtained. The microstructure, compositional characteristics and thermal stability of the composites were thoroughly studied by X-ray diffraction (XRD), X-ray fluorescent spectroscopy (XRF), Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and Thermogravimetric analysis (TGA).

Electron injection effect in InO and SnO nanocrystals modified by ruthenium heteroleptic complexes.

In this work, the optical characteristics and conductivity under photoactivation with visible light of hybrids based on nanocrystalline SnO2 or In2O3 semiconductor matrixes and heteroleptic Ru(ii) complexes were studied. The heteroleptic Ru(ii) complexes were prepared based on 1H-imidazo[4,5-f][1,10]phenanthroline and 2,2'-bipyridine ligands. Nanocrystalline semiconductor oxides were obtained by chemical precipitation with subsequent thermal annealing and characterized by XRD, SEM and single-point BET methods.

Organic-Inorganic Hybrid Materials for Room Temperature Light-Activated Sub-ppm NO Detection.

Nitric oxide (NO) is one of the main environmental pollutants and one of the biomarkers noninvasive diagnosis of respiratory diseases. Organic-inorganic hybrids based on heterocyclic Ru (II) complex and nanocrystalline semiconductor oxides SnO and InO were studied as sensitive materials for NO detection at room temperature under periodic blue light (λ = 470 nm) illumination. The semiconductor matrixes were obtained by chemical precipitation with subsequent thermal annealing and characterized by XRD, Raman spectroscopy, and single-point BET methods.

Synthesis of fused heterocyclic systems via the Mallory photoreaction of arylthienylethenes.

Photochemical oxidative cyclization of 2- and 3-thienylstilbenes (heterostilbenes) containing mono-, di- and trimethoxy groups in the benzene ring or heterocyclic fragment results in the formation of isomeric thieno-annelated polycyclic aromatic compounds demonstrating optical properties that differ from those of initial stilbene derivatives. The structures of cyclic products were evaluated viaH and C NMR, HRMS, elemental analysis and X-ray crystallography. The research was aimed to study the effect of substituents in stilbene derivatives of thiophene as well as the position of the styryl fragment in the thiophene nucleus on the occurrence of photocyclization reactions.

Sandwich double-decker Er(iii) and Yb(iii) complexes containing naphthalocyanine moiety: synthesis and investigation of the effect of a paramagnetic metal center.

Novel heteroleptic Er(iii) and Yb(iii) naphthalocyaninato-phthalocyaninates containing an octa-phenyl or octa-phenoxysubstituted naphthalocyanine deck were synthesised and identified by H NMR, EPR and high resolution MALDI-TOF/TOF mass spectrometry. Direct synthesis of novel homoleptic Yb(iii) bis (octa-phenylnaphthalocyaninate) was carried out. Downfield lanthanide induced shifts of the aromatic protons in target compounds were observed compared with the corresponding diamagnetic Lu(iii) complexes.

Groundwater of the Crimean peninsula: a first systematic study using stable isotopes.

Karst springs in the Main Range of the Crimean Mountains and the Crimean Piedmont show a restricted range of values (δO = -10.5 to -8.0 ‰, δH = -72 to -58 ‰), somewhat more negative than the weighted mean of meteoric precipitation.

Photosensitive Organic-Inorganic Hybrid Materials for Room Temperature Gas Sensor Applications.

In this work, the hybrids based on nanocrystalline SnO₂ or In₂O₃ semiconductor matrixes and heterocyclic Ru(II) complex are studied as materials for gas sensors operating at room temperature under photoactivation with visible light. Nanocrystalline semiconductor oxides are obtained by chemical precipitation with subsequent thermal annealing and characterized by XRD, SEM and single-point BET methods. The heterocyclic Ru(II) complex is synthesized for the first time and investigated by ¹H NMR, C NMR APT, MALDI-MS analysis, and UV-Vis spectroscopy.

H₂S Sensing by Hybrids Based on Nanocrystalline SnO₂ Functionalized with Cu(II) Organometallic Complexes: The Role of the Ligand Platform.

This paper deals with the functionalization of nanocrystalline SnO₂ with Cu(II) complexes with organic ligands, aimed at the improvement of sensor selectivity towards gas molecules. For the synthesis of metalorganic/SnO₂ hybrid material complexes of Cu(II) with phthalocyanine, porphyrinines, bipyridine and azadithiacrown etherwere used. The analysis of gas sensor properties showed the possibility of increasing the sensitivity and selectivity of hybrid materials in H₂S detection due to the electron transfer from SnO₂ to an adsorbed organic molecule, which changes during the interaction between H₂S and Cu(II) ions.

[Intraoperative photon therapy in combination with mapping of motoric cerebral cortex in surgery of metastatic tumours of functionally significant zones of the large hemispheres of the brain].

Intraoperative radiation photon therapy (IORT) is a current effective technique based on the radiation exposure of extirpated tumor bed. This method is used in neurosurgery as a part of combined treatment of intracranial malignancies. The article presents the technique, an analysis of surgical treatment of 10 patients with cerebral metastases form of the lung and breast cancer, located in functionally important zones of the brain or nearby.

[Cardiovascular performance in Yamal adolescents in adapting to academic activity].

The combined use of cardiointervalography and an orthostatic test allows detailed assessment of the adaptive capacities of the cardiovascular system. The paper gives the results of examination of 60 healthy adolescents from Yamal. Adjustment mechanisms have been assessed by means of hemodynamic parameters in boys and girls.

[An academic process and children's health status in the Far North].

The authors examined 210 children aged 11-12 years for the impact of an academic process on the mental and physical health of pupils. The children were from two schools: a school with a physicomathematical bias and a general educational school. The anxiety of the children from these schools and their physical health were evaluated.

Evaluation and prognosis of non-infectious risk in children in dependence on age and period of living in the Far North.

Unlabelled: Aim of the study was to define the interconnection between the period of living in extreme conditions of the Far North and non-infectious risk-factors (RF) development. The research of prevalence of main RF (salt-sensitivity deviation (SSD), low physical activity (LPhA), dyslipidemia, hyperglycemia, smoking, low Mg blood level, excessive body mass (EBM), elevated blood pressure (EBP)) was done. 1,492 schoolchildren aged 11-14 years living in the Far North (Nadym-city, Yamalo-Nenets Autonomous Okrug) were examined.

[Main trends concerning risk factors and health of adolescents in Far North].

The actual problems of health-keeping in children and adolescents living in high latitudes are analyzed. The data on morbidity and spreading of risk factors of chronic non-infectious diseases in adolescents aged 14-17 living in the Far North are presented.

[Electron microscopic study of the structure of cholera bacteriophage serotype II].

The methods of electron microscopy and optic difraction were used to determine the main parameters of the structural organization of cholera bacteriophage of serotype II. The virions of the phage under study were found to consist of a capsid of icosahedral shape and 77.4 X 66.

[Morphology of the temperate plague phages 1701 and 1710 and their mutants].

A study was made of the morphology of plague moderate bacteriophages 1701, 1710 and their mutants 1701-1 and 1710-1. The phages proved to be morphologically identical, were referred to group 5, and were identical to the moderate plague H-phages; when confronted to the commonness of the serological properties and a number of other signs this indicated their affinity.

[Comparative characteristics of the ultrastructure of the causative agents of glanders and melioidosis].

The authors examined the ultrastructure of the causative agents of glanders and melio idosis. It was revealed that the structure of their cell wall and of the cytoplasmic membrane was characteristic of Gram negative bacteria. The cytoplasm of both types of the causative agents showed the presence of ribosomes, membrane structure, nucleoid, and also osmiophilic and osmiophobic inclusions.