123 research outputs found
Phenol chemisorption onto phthalocyanine thin layers probed by ATR-FTIR difference spectroscopy
No full textAttenuated total reflection Fourier transform infrared
(ATR-FTIR) difference spectroscopy has been employed as a
powerful method for the comprehension of active layer–
analyte interactions, revealing interesting mechanistic aspects
concerning the binding of halogen-substituted phenols onto
phthalocyanine Langmuir–Schaefer films
Phthalocyanine and Porphyrin Derivatives and Their Hybrid Materials in Optical Sensors Based on the Phenomenon of Surface Plasmon Resonance
No full textIn this review, the state of research over the past fifteen years in the field of the applications of metal phthalocyanines and porphyrin derivatives as well as their hybrid materials with carbon nanotubes, metal oxides, and polymers in optical sensors based on the phenomenon of surface plasmon resonance (SPR) is analyzed. The first chapter of the review presents an analysis of works on the use of porphyrins and phthalocyanines in classical SPR sensors for the detection of gases and volatile organic vapors, as well as their improved modifications, such as total internal reflection ellipsometry (TIRE) and magneto-optical SPR (MOSPR) methods, while the second chapter is devoted to their application for the detection of various analytes in solutions. The third chapter of the review summarizes publications describing recent advances in the use of porous materials based on hybrids of carbon nanotubes and oxides with metal phthalocyanines. The fourth chapter describes two-dimensional metal-organic frameworks (MOFs) based on metal porphyrin derivatives as SPR sensitizers
Organic/Inorganic Nanocomposites Based on ‘Three Pillars’ (Organic Compounds, Metal Nanoparticles, and Carbon Nanomaterials)
No full textA wide variety of organic molecules, ranging from simple aromatic molecules to complexes with organic ligands and polymers, offer the possibility of creating both simple and complex structures with diverse physicochemical properties [...
Educational Potential of English Textbooks for High School
No full textThe article deals with the actualization of the educational (upbringing) potential of English textbooks used in senior grades of high school. In the process of teaching a foreign language, a teacher can also influence the development of the material, spiritual, professional, and life values of children through the correct setting of learning goals as well as through the selection of the content of educational materials. They should be informative, rely on the knowledge and experience of students and cause certain emotional experiences. This means that the upbringing concept, which is enshrined in the federal law “On Education in the Russian Federation” and the Federal State Educational Standard and is implemented through various subjects, including the subject “Foreign language”, comes to the fore. In view of this fact the author of the article considers various approaches to education while teaching a foreign language and analyses the way the concept is realized in one of the textbooks used for teaching English in Russian high schools
Highly selective and ultra-sensitive electrochemical sensor behavior of 3D SWCNT-BODIPY hybrid material for eserine detection
No full textIn this work, 4,4-difluoro-8-(4-hydroxyphenyl) - 2,6-diethynly-1,3,5,7-tetramethyl-4-bora-3a,4a-diaza-s-indacene (BODIPY) having double terminal ethynyl groups was synthesized. Three dimensional single walled carbon nanotube (SWCNT)-BODIPY hybrid material (3D SWCNT-BODIPY) was synthesized by the reaction of BODIPY bearing double terminal ethynyl groups with azido containing SWCNTs via Click reaction. The structural properties and electrochemical detection of eserine (a pesticide) on BODIPY functionalized SWCNTs as a three dimensional (3D) material were investigated. A glassy carbon electrode (GCE) was modified by 3D SWCNT-BODIPY hybrid material for the determination of eserine in the range of 0.25-2.25 M. In the study by the square wave voltammetry (SWV), the bare GCE showed no response, while the new peak at - 0.6 V appeared in the case of the modified electrode. The detection limit and quantification were determined as 160 nM and 528 nM for eserine on the 3D SWCNT-BODIPY modified electrode, respectively. Eserine was also determined with a standard addition method in different brands of orange juices, and the recovery of eserine was obtained to be in the range of 102.09% and 103.22%. This study clearly indicates that the 3D SWCNT-BODIPY modified electrode tested as an electrochemical sensor was found to be highly selective and sensitive to eserine
Ammonia sorption studies into thin layers of hexadecafluorinated cobalt phthalocyanine using optical techniques
No full textОбраз Византии в новогреческой литературе XIX-XX веков
No full textАннотация к магистерской диссертации Тема: Образ Византии в новогреческой литературе XIX-XX в. Автор работы: студентка филологического факультета Санкт-Петербургского государственного университета Басова Екатерина Сергеевна. Общий объем работы: 112 страниц. Работа включает в себя: вводную часть, две главы, заключение, перечень использованной литературы и приложение. Цель данного исследования: дать целостный анализ византийской тематики в произведениях греческой литературы XIX-ХХ в., уделяя особое внимание литературе первой половины ХХ в., а именно поэзии «поколения 30-х». Первая глава: в первой главе кратко рассмотрены произведения, посвященные византийской тематике, написанные в период с XVIII по конец XIX в. Вторая глава: данная глава посвящена авторам «поколения 30-х» и их рецепции образа Византии. Глава включает в себя два основных блока: 1. Образ Византии в прозе «поколения 30-х» 2. Образ Византии в поэзии «поколения 30-х» Во втором блоке проводится историко-литературный анализ стихотворений на византийскую тематику Йоргоса Сефериса, Одисеаса Элитиса и Никоса Энгонопулоса. Актуальность и современность данного исследования обусловлена тем, что проблематика интертекстуальных связей и исторических источников, а также связи византийской литературы и новогреческой на сегодняшний момент является темой почти что не изученной в современных исследованиях неоэллинистики. В ходе настоящего исследования был проведен анализ основных произведений греческой литературы, посвященных византийской тематике, дан краткий обзор произведений, написанных в конце XVIII-XIX вв. и более подробный анализ произведений XX в., с основным упором на поэзию «поколения 30-х». Выявлены основные образы, мотивы и система персонажей, характерные для исследуемого периода.Master’s level dissertation abstract Subject: The image of Byzantium in the Greek literature of the XIX-XX century. Author Ekaterina Basova, student of the Faculty of Philology, St. Petersburg State University. Total number of pages: 112. The work consists of introductory part, two chapters, conclusion, bibliography and appendix. The purpose of this paper is to provide a holistic analysis of Byzantine themes in Greek literature of the 19th and 20th century, paying special attention to the literature of the first half of the 20th century, namely the poetry of the Generation of the 30s. The first chapter: the first chapter briefly reviews the works on the Byzantine themes, written in the period from the XVIII to the end of the XIX century. The second chapter: this chapter is devoted to the authors of the Generation of the 30s and their reception of the image of Byzantium. This chapter includes two main blocks: 1. The image of Byzantium in the prose of the Generation of the 30s. 2. The image of Byzantium in the poetry of the Generation of the 30s. The second block gives a historical and literary analysis of the poems on the Byzantine themes of George Seferis, Odysseas Elytis and Nikos Engonopulos. The relevance and modernity of this study is due to the fact that the problems of intertextual relations and historical sources, as well as the connection of Byzantine and Modern Greek literature, are by now among the topics, which has been little studied in Modern Greek Studies. This paper shows an analysis of the main works of Greek literature on Byzantine themes, a brief review of the works written at the end of the 18th and 19th centuries and a more detailed analysis of the works of the 20th century, with a focus on the poetry of the Generation of the 30s. Identifies the main images, motifs and character system, characteristic of the period under consideration
Distribution of single-walled carbon nanotubes in pyrene containing liquid crystalline asymmetric zinc phthalocyanine matrix
No full textA novel pyrene containing asymmetric Zn(II) phthalocyanine (AB3 type) was synthesized and characterized by various spectroscopic techniques as well as elemental analysis. A symmetric polyoxyethylene substituted Zn(II) phthalocyanine (B4 type) derivative was also prepared in order to compare the properties and determine the effect of the pyrene group on the phthalocyanine molecule. Composites of synthesized zinc(II) phthalocyanine-single wall carbon nanotubes (ZnPc-SWCNTs) containing 1 and 2 wt% carbon nanotubes were prepared by mixing these two components in dichloromethane followed by removal of the solvent and drying under vacuum. The liquid crystalline properties of the pure compounds and their composites were investigated in comparison with symmetric polyoxyethylene substituted Zn(II) phthalocyanine (B4 type) by using polarized optical microscopy, differential scanning calorimetry and X-ray diffraction analysis. The distribution of the SWCNTs in the ordered matrix of the columnar mesophase of these derivatives was studied by the method of polarized Raman spectroscopy and scanning electron microscopy (SEM). It was shown that the nature of the mesophases was not altered in these composites. The I(V) dependencies for the films deposited onto interdigitated electrodes were measured and it was shown that the lateral conductivity tends to increase with increasing SWCNT concentration
Old Ladoga: An ‘Imagined’ Russian Capital
No full textThe article is focused on the explanation of the term ‘capital’ in the framework of post-modernism and the development of the concept ‘capitalness’ on the example of Ladoga. The author analyses the elements of ‘capitalness’ of Ladoga and make conclusions about the potential future development of this concept in the mind of Ladoga’s citizens
Recent Advances in Phthalocyanine and Porphyrin-Based Materials as Active Layers for Nitric Oxide Chemical Sensors
No full textNitric oxide (NO) is a highly reactive toxic gas that forms as an intermediate compound during the oxidation of ammonia and is used for the manufacture of hydroxylamine in the chemical industry. Moreover, NO is a signaling molecule in many physiological and pathological processes in mammals, as well as a biomarker indicating the course of inflammatory processes in the respiratory tract. For this reason, the detection of NO both in the gas phase and in the aqueous media is an important task. This review analyzes the state of research over the past ten years in the field of applications of phthalocyanines, porphyrins and their hybrid materials as active layers of chemical sensors for the detection of NO, with a primary focus on chemiresistive and electrochemical ones. The first part of the review is devoted to the study of phthalocyanines and porphyrins, as well as their hybrids for the NO detection in aqueous solutions and biological media. The second part presents an analysis of works describing the latest achievements in the field of studied materials as active layers of sensors for the determination of gaseous NO. It is expected that this review will further increase the interest of researchers who are engaged in the current level of evaluation and selection of modern materials for use in the chemical sensing of nitric oxide
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