Kurtsevich, A. E.

Odod, A. V.

English

Electronic archive of Tomsk Polytechnic University

 Секция 7.  Химия и химическая технология на иностранном языке489quality of the final product [1]. There-fore, it has been hypothesized that for the normal work mode of the sulfon-ation with sulfuric anhydride in the reactor, which contain a high content of by-product aromatic components in the feedstock, it is necessary to in-crease the sulfur feed to combustion. It can help to enlarge the sulfuric anhy-dride concentration in the sulfonation reactor. This assumption is confirmed by an analysis of the production data presented in Fig. 1:Then, the optimum values of sulfur were calculated with using the mathematical model. The optimum values are directly connected to the concentration of aromatic compounds in the raw materials. LABSA yield constantly maintains on a high level (Fig. 2).It is established that the obtained data on the optimal sulfur consumption allow to increase the LABSA content in the product stream by 1–0.5 %.Acknowledgements: The reported study was funded by RFBR according to the research project № 18-38-00487.References1. Ivanchina E.D., Ivashkina E.N., Dolganova I.O., Dolganov I.M., Krutey A.A. // Procedia Engineering, 2016.– Vol.152.– P.73–80.TWO-LAYER HIGH-EFFICIENCY OLED-STRUCTURES BASED ON NEW POLYFLUORENESA.E. Kurtsevich1,2, A.V. Odod1,2Scientific director – Dr. Sc. (Phys.-Math.), Head of the Laboratory of Organic Electronics T.N. Kopy’lova11Siberian Physics and Technics Institute Novosobornaya Square, 1, mail@spti.tsu.ru2The National Research Tomsk State University Tomsk, Lenina Avenue, 36, rector@tsu.ruPolyfluorene is widely used as the main mate-rial for creating blue LEDs [1]. For the production of red LEDs, in particular, iridium complexes with organic ligands are used [2]. Because iridium is a rare metal, the light-emitting devices produced on its basis have a high cost. To solve this problem, it was proposed to use polyfluorene derivatives, the maximum radiation of which falls on the red and green regions.The main of this work was to create high-effi-ciency light-emitting devices based on polyfluorene derivatives. To do this, it was necessary to make an OLED structure, measure its electroluminescent and geometric characteristics.The study used polyfluorene derivatives syn-thesized in the laboratory of polymer nanomate-Fig. 1.  Dynamics of the change in sulfur supply for combustion from the content of aromatic compounds in raw materialsFig. 2.  Dynamics of the change in the optimal sulfur supply for combustion from the content of aromatic compounds in raw materialsXIX Международная научно-практическая конференция имени профессора Л.П. Кулёва490rials and compositions for optical media Institute of Macromolecular Compounds of RAS, St. Pe-tersburg. All polymer samples contain triphenyl-amine-containing monomer (25 mole %) residues – the hole-transport component. A monomer con-taining a phosphoric acid residue is incorporated into most copolymers. The task of this monomer is to increase the injection of electrons. A polymer containing residues of only this monomer, PFPO, was also used.OLED-structures were made, of different con-figuration and thickness of layers. The anode was ITO on a glass substrate. The electroconductive lay-er PEDOT: PSS and the emitting layers of polyflu-orenes were applied by spin-coating from solutions. Different types of cathodes were used, deposition was carried out by thermovacuum evaporation.As a result, close results were obtained for thin- and thick-film devices with sufficiently high efficiency (up to three Kd/A at a supplied voltage of 15 V) and high stability.Table 1. Used polymersSymbol Fluorescence Color Chemical structureRI-1 RedRI-2 RedBI-4 BlueBI-5 Greena)b)c)Fig. 1.  I–V and I–L curves (a), electroluminescence spectrum (b) and color coordinates (c)	of	a	two-layer	thick-film	OLED,	created	on	the	basis	of	BI-5	and	PFPO Секция 7.  Химия и химическая технология на иностранном языке491References1. Bhatnagar P.K. Organic Light-Emitting Di-odes–A Review // Nanomaterials and Their Ap-plications.– Springer, Singapore, 2018.– P.261–287.2. Chang Y.F. et al. Great improvement of opera-tion-lifetime for all-solution OLEDs with mixed hosts by blade coating // Organic Electronics.– 2017.– V.42.– P.75–86.THIN CHITOSAN FILMS FOR APPLICATION IN PHOTODYNAMIC THERAPYV.V. Kurtukov, A. Di Martino, S.S. VlasovScientific advisor – Assoc. Prof., PhD P.S. Postnikov Linguist – Assoc. Prof., PhD I.A. MatveenkoNational Research Tomsk Polytechnic University 634050, Russia, Tomsk, 30 Lenin Avenue, kurtukov@tpu.ruPhotodynamic therapy (PDT) is an effective treatment for human premalignant and malignant lesions because it is non-invasive, well tolerated by patients and can be performed repeatedly without cumulative side effects [1]. Chitosan crosslinked tannic acid films have been prepared to load the photosensitizer 5-aminolevulinic acid (5-ALA) to improve its outcome in PDT. The 50 μm thick film is biocompatible and biodegradable and it dissolves in physiological condition in under 24 h [2]. The surface morphology and the porosity allow an op-timal 5-ALA release pattern with a pH-dependent rate.In vitro tests on HeLa cells demonstrate an increase in phototoxicity, showed by a significant drop in cell viability after laser treatment, when the film loaded with 5-ALA was used compared to free 5-ALA demonstrating the peculiarity of the pre-pared film for future application in PDT.The graph shows a considerable increase in cy-totoxicity of the samples containing CS films with added 5-ALA.Fig. 2.		Porosity	of	chitosan	crosslinked	tannic	acid	film.	Bar	scale	:	A)	10	μm;	B)	5	μm	and	C)	50	μmFig. 1.		Surface	morphology	of	chitosan	crosslinked	tannic	acid	film

Two-layer high-efficiency OLED-structures based on new polyfluorenes

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Two-layer high-efficiency oled-structures based on new polyfluorenes

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Two-layer high-efficiency oled-structures based on new polyfluorenes

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