Chimica Techno Acta最新文献_第3页

Oxygen-ion and proton conductivity in the Ba3InGa2O7.5 complex oxide with incomplete oxygen sublattice 具有不完整氧亚晶格的 Ba3InGa2O7.5 复合氧化物中的氧离子和质子传导性

Chimica Techno Acta Pub Date : 2024-01-17 DOI: 10.15826/chimtech.2024.11.1.02

Nadezhda Kochetova, Veronika Cherepanova, Alyona Pikalova, Artem Gilev

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Improvement of biocompatibility of high molecular weight poly-3-hydroxybutyrate by blending with its functionalized oligomers 通过与功能化低聚物共混改善高分子量聚-3-羟基丁酸酯的生物相容性

Chimica Techno Acta Pub Date : 2024-01-16 DOI: 10.15826/chimtech.2024.11.1.01

Anatoly Boyandin, L. M. Dvoinina, A. Sukovatyi, A. A. Sukhanova, N. Ertiletskaya

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Conjugates of 8-[2,2’-bipyridinyl]coumarins as potential chemosensors for Al3+, Cu2+, Cd2+, Zn2+ ions: synthesis and photophysical properties 作为 Al3+、Cu2+、Cd2+、Zn2+ 离子潜在化学传感器的 8-[2,2'-联吡啶基]香豆素共轭物：合成与光物理性质

Chimica Techno Acta Pub Date : 2023-12-28 DOI: 10.15826/chimtech.2023.10.4.17

A. Sharapov, R. Fatykhov, I. Khalymbadzha, D. Kopchuk, I. Nikonov, Anastasiya P. Potapova, Y. Shtaitz, Pavel A. Slepukhin

{"title":"Conjugates of 8-[2,2’-bipyridinyl]coumarins as potential chemosensors for Al3+, Cu2+, Cd2+, Zn2+ ions: synthesis and photophysical properties","authors":"A. Sharapov, R. Fatykhov, I. Khalymbadzha, D. Kopchuk, I. Nikonov, Anastasiya P. Potapova, Y. Shtaitz, Pavel A. Slepukhin","doi":"10.15826/chimtech.2023.10.4.17","DOIUrl":"https://doi.org/10.15826/chimtech.2023.10.4.17","url":null,"abstract":"In this work, we report the synthesis of novel coumarin-bipyridine conjugates using a sequence of C–C coupling reaction between 5,7-dimethoxycoumarins and 3-pyridyl-6-aryl-1,2,4-triazines followed by the Boger reaction with norbornandiene to obtain 8-[2,2'-bipyridyl]-5,7-dimethoxycoumarins. Photophysical properties were investigated for the obtained series of 8-[2,2'-bipyridyl]-5,7-dimethoxycoumarins: absorption and emission wavelength maxima are in the region of 212–296 and 401–410 nm, respectively; Stokes shifts are up to 116 nm, and fluorescence quantum yields are up to 15.0%. It was found that titrating the conjugates with Al3+, Zn2+, and Cd2+ ions results in an increase in the intensity of the emission maxima of the complexes, while the opposite effect was observed in the case of titration with Cu2+ ions. These findings suggest that the studied compounds may be considered as promising chemosensing materials. Finally, a positive solvatochromism of 8-[2,2'-bipyridyl]coumarins and their metal complexes was established. The experimental data are supported by mathematical calculations according to the Lippert-Mataga equation and Kosower diagram.","PeriodicalId":9964,"journal":{"name":"Chimica Techno Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139152429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anodic dissolution of gallium in alkali metal chloride melts 镓在碱金属氯化物熔体中的阳极溶解

Chimica Techno Acta Pub Date : 2023-12-28 DOI: 10.15826/chimtech.2023.10.4.16

O. Tokarev, V. Volkovich

引用次数: 0

Combination of fluorescent and spin labels: a powerful method for the optimization of hydrophilic membranes for the separation of oil-in-water emulsions 荧光标签与自旋标签的结合：优化亲水膜分离水包油型乳液的有效方法

Chimica Techno Acta Pub Date : 2023-12-15 DOI: 10.15826/chimtech.2023.10.4.15

Rita S. Alqubelat, Alena D. Kuznetsova, Denis O. Antonov, Maxim A. Mironov

引用次数: 0

Chemical stability aspects of BaCe0.7–xFexZr0.2Y0.1O3–δ mixed ionic-electronic conductors as promising electrodes for protonic ceramic fuel cells 作为质子陶瓷燃料电池理想电极的 BaCe0.7-xFexZr0.2Y0.1O3-δ 混合离子电子导体的化学稳定性问题

Chimica Techno Acta Pub Date : 2023-12-08 DOI: 10.15826/chimtech.2023.10.4.14

L. Tarutina, Inna A. Starostina, Gennady Vdovin, Svetlana Pershina, Emma Vovkotrub, Anna Murashkina

{"title":"Chemical stability aspects of BaCe0.7–xFexZr0.2Y0.1O3–δ mixed ionic-electronic conductors as promising electrodes for protonic ceramic fuel cells","authors":"L. Tarutina, Inna A. Starostina, Gennady Vdovin, Svetlana Pershina, Emma Vovkotrub, Anna Murashkina","doi":"10.15826/chimtech.2023.10.4.14","DOIUrl":"https://doi.org/10.15826/chimtech.2023.10.4.14","url":null,"abstract":"Mixed ion-electron conductors (MIECs) are promising materials for air electrodes for protonic ceramic fuel cells (PCFCs) or oxygen permeation membranes. In this work, various aspects of the chemical stability of Co-free MIEC materials, BaCe0.7–xFexZr0.2Y0.1O3–δ, were studied, including their interaction with another functional material (BaCe0.5Zr0.3Y0.1Yb0.1O3–δ-based proton-conducting electrolyte) and gas components (H2O, CO2, and H2). Chemical compatibility studies indicate no visible chemical interaction between the electrode and electrolyte materials even at 1200 °C, which is significantly higher than the operating temperatures (600–800 °C) of PCFCs. The treatments of BaCe0.7–xFexZr0.2Y0.1O3–δ in different atmospheres at 1100 °C, according to the XRD, SEM, IR and Raman spectroscopy data, resulted in the formation of impurity phases. However, their extremely small amounts suggest that they may not form at the operating temperatures. Thus, it can be assumed that the studied materials can be good candidates for various electrochemical applications.","PeriodicalId":9964,"journal":{"name":"Chimica Techno Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138588228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Towards controlling the morphology of cobalt loaded nanocomposites in polyol process with polyethylene glycol 在聚乙二醇多元醇工艺中控制钴负载纳米复合材料的形貌

Chimica Techno Acta Pub Date : 2023-12-07 DOI: 10.15826/chimtech.2023.10.4.13

A. Burmatova, A. Khannanov, Liana Zubaidullina, Dmitry Emelianov, Olga Mostovaya, Ivan I. Stoikov, Nikolay Ulakhovich, Marianna Kutyreva

{"title":"Towards controlling the morphology of cobalt loaded nanocomposites in polyol process with polyethylene glycol","authors":"A. Burmatova, A. Khannanov, Liana Zubaidullina, Dmitry Emelianov, Olga Mostovaya, Ivan I. Stoikov, Nikolay Ulakhovich, Marianna Kutyreva","doi":"10.15826/chimtech.2023.10.4.13","DOIUrl":"https://doi.org/10.15826/chimtech.2023.10.4.13","url":null,"abstract":"The polyol process is one of the simple, efficient and productive methods for the synthesis of metal loaded polymer composites. Functional properties of metal-polymer nanocomposites are determined by chemical composition, size and morphology of their particles. Finding effective ways to control the nanoparticle's properties during the polyol process is a crucial task. The effect of molar ratio Mn+/OHPEG on the formation of cobalt loaded metal-polymer nanocomposites during a one-pot two-component polyol process by polyethylene glycol with Mr = 4000 g·mol–1 (PEG) was studied. The PEG-based polyol process and the formation of cobalt nanophase were studied at molar ratios νCo2+/νOH(PEG) = 1:1, 1:10, 1:100 and 1:500 using UV-Vis, diffuse reflectance IR and ATR FT-IR spectroscopy, nanoparticle tracking analysis (NTA), dynamic light scattering (DLS). It was found that PEG can act as a reducing agent and stabilizing matrix for the cobalt nanophase at a ratio higher than Mn+/OHPEG= 1:10. The composition and morphology of Co/PEG nanocomposites were determined by XRD and TEM methods. Two types of spheroid particles with average diameters of 88±55 nm / 8±4 nm and 12±3 nm / 3±1 nm, respectively, represent Co/PEG nanocomposites 1:500 and 1:100. Scaly structures with a diameter of 15±5 nm are formed at a molar ratio of νCo2+/νOH(PEG) = 1:10. An increase in the Co2+ content in the PEG-based polyol process leads to the immobilized cobalt nanophase Co3O4 (1:500), Co0/CoO (1:100), CoO (1:10) in PEG. Co/PEG nanocomposites are hemocompatible. The HC50value depends on the composition and morphology of the nanoparticles.","PeriodicalId":9964,"journal":{"name":"Chimica Techno Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138592805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative characteristic of Bi- and La- doped (Ca/Sr)MoO4 -based materials with a defect scheelite-type structure 具有白钨矿缺陷型结构的掺杂(Ca/Sr)MoO4（Bi 和 La）基材料的比较特性

Chimica Techno Acta Pub Date : 2023-12-06 DOI: 10.15826/chimtech.2023.10.4.11

Z. Mikhaylovskaya, A. V. Klimova, Sofia A. Petrova, E. Pankrushina, E. S. Buyanova

{"title":"Comparative characteristic of Bi- and La- doped (Ca/Sr)MoO4 -based materials with a defect scheelite-type structure","authors":"Z. Mikhaylovskaya, A. V. Klimova, Sofia A. Petrova, E. Pankrushina, E. S. Buyanova","doi":"10.15826/chimtech.2023.10.4.11","DOIUrl":"https://doi.org/10.15826/chimtech.2023.10.4.11","url":null,"abstract":"CaMoO4- and SrMoO4-based scheelite-type phases are noteworthy functional materials, whose properties strongly correlate with their structure. This work is devoted to La- or Bi-doped scheelite-type molybdates. The purpose of the present study is to quantify the effect of isolated electron pairs of bismuth on the distortion of the structure and related properties. Conventional solid-state technology was used for the synthesis of (Ca/Sr)1–3xLa2xФxMoO4 and Sr1–3xBi2xФxMoO4, (0.025≤ x ≤ 0.275). The structure was investigated by X-ray powder diffraction and Raman spectroscopy. Rates of structure distortion were characterised by the analysis of the autocorrelation function (AAF) of Raman spectra. Energy gaps were calculated by the Kubelka-Munk method. The conductivity was studied with a.c. impedance spectroscopy. For (Ca/Sr)1−3x(Bi/La)2xФxMoO4 series 0.025 ≤ x ≤ 0.15 compositions show a basic defect scheelite structure, while 0.15 x ≤ 0.225 compositions of Bi-doped samples exhibit tetragonal supercells. The chemical compression of unit cell is more evident in the case of Bi-doping, indicating the preferred orientation of the isolated electron pairs. The distortion of MoO4 polyhedra showed by AAF was more significant for Sr1−3xBi2xФxMoO4 than for Sr1−3xLa2xФxMoO4, the Δcorr parameters for Bi-doped compositions were almost double in comparison with La-doped one in the range of 50–600 cm–1 of the Raman shift. The «critical» x = 0.15 point was also clearly indicated by Δcorr parameter. The AAF of the Raman spectra of solid oxides was shown to be a good tool for prediction of properties and points of phase transitions in solid oxides.","PeriodicalId":9964,"journal":{"name":"Chimica Techno Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138597834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Towards nanomaterials with tubular pores: synthesis and self-assembly of bis-pillar[5]arene 开发具有管状孔隙的纳米材料：双柱[5]炔的合成与自组装

Chimica Techno Acta Pub Date : 2023-12-06 DOI: 10.15826/chimtech.2023.10.4.12

D. Shurpik, Yulia I. Aleksandrova, Lyaysan I. Makhmutova, Alan Akhmedov, Ivan I. Stoikov

引用次数: 0

Acknowledgment of Chimica Techno Acta’s reviewers for 2023 2023 年 Chimica Techno Acta 杂志审稿人致谢

Chimica Techno Acta Pub Date : 2023-11-28 DOI: 10.15826/chimtech.2023.10.4.e

Dmitry A. Medvedev

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