Bulletin of the Korean Chemical Society最新文献_第10页

Surface modification of perforated separator for more robust and thinner all-solid-state electrolyte membrane 对穿孔分离器进行表面改性，使全固态电解质膜更坚固、更薄

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-02-14 DOI: 10.1002/bkcs.12829

Dohwan Kim, Seungyeop Choi, Cheol Bak, Youngjoon Roh, Cyril Bubu Dzakpasu, Yong Min Lee

{"title":"Surface modification of perforated separator for more robust and thinner all-solid-state electrolyte membrane","authors":"Dohwan Kim, Seungyeop Choi, Cheol Bak, Youngjoon Roh, Cyril Bubu Dzakpasu, Yong Min Lee","doi":"10.1002/bkcs.12829","DOIUrl":"10.1002/bkcs.12829","url":null,"abstract":"Solid electrolytes (SEs) play an essential role in the development of all-solid-state batteries (ASSBs) due to their exceptional ionic conductivity. However, conventional pelletized SEs with hundreds of micrometers result in highly reduced energy density and suffer from mechanical brittleness, which delay the commercialization of ASSBs. In this study, we present an innovative approach to fabricate SE membranes with perforated Al2O3 nanolayer-coated polyethylene (PE) separator as a mechanical supporter. Al2O3-coated separators exhibit better adhesion with LPSCl particles and better thermal stability. As a result, the SE membrane exhibits thickness of 35 μm while maintaining a superior mechanical tensile strength. Furthermore, when the SE membrane is applied to Li||LiNi0.7Co0.15Mn0.15O2 full-cells, stable cycling performance over 250 cycles, which is comparable to thick LPSCl pellet cell, can be achieved even with higher conductance (>150 mS). Our results highlight the potential of thin and durable SE membranes in contributing to the commercialization of ASSBs.","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":"45 4","pages":"341-349"},"PeriodicalIF":1.7,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139772657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metal–organic frameworks as a fluorescent probe for detection of pathogenic biomarkers in human urine 金属有机框架作为荧光探针检测人体尿液中的病原生物标记物

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-02-13 DOI: 10.1002/bkcs.12827

Seyeon Jeong, Hoi Ri Moon

引用次数: 0

Photocatalytic degradation of 4-nitrophenol by using multicomponent Cu2O-Cu@TiO2 nanoparticle aggregates 利用多组分 Cu2O-Cu@TiO2 纳米粒子聚合体光催化降解 4-硝基苯酚

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-02-13 DOI: 10.1002/bkcs.12822

Jianwei Jiang, Seokyeong Moon, Sungho Yoon, Longhai Piao

{"title":"Photocatalytic degradation of 4-nitrophenol by using multicomponent Cu2O-Cu@TiO2 nanoparticle aggregates","authors":"Jianwei Jiang, Seokyeong Moon, Sungho Yoon, Longhai Piao","doi":"10.1002/bkcs.12822","DOIUrl":"10.1002/bkcs.12822","url":null,"abstract":"Multicomponent nanomaterials with synergistic effect were typically used to enhance the photocatalytic performance. Herein, three-component nanomaterials composed of Cu2O, Cu, and TiO2 were prepared using a facile method, and applied in the photocatalytic degradation reactions. The synthetic procedure involves the formation of Cu2O nanoparticle aggregates (NPAs) followed by Cu nanoparticles growth on the surface of Cu2O NPAs in one pot, and TiO2 encapsulation (Cu2O-Cu@TiO2). The catalyst structure was characterized by x-ray diffraction, field emission-scanning electron microscopy, transmission electron microscopy, and energy-dispersed x-ray. The catalytic performance of Cu2O-Cu@TiO2 NPAs was evaluated through the photocatalytic degradation of 4-nitrophenol under the simulated solar light. We found that it exhibited greater activity than the Cu2O-Cu NPAs, commercial TiO2, and Cu2O@TiO2 NPAs, probably due to their synergistic interactions resulting in the effective photogenerated carrier transfer in the multicomponent nanomaterials.","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":"45 4","pages":"373-377"},"PeriodicalIF":1.7,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139772726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecular dyad exhibiting strong multi-resonance blue fluorescence 分子二元体发出强烈的多共振蓝色荧光

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-02-09 DOI: 10.1002/bkcs.12824

Byung Hak Jhun, Youngmin You

引用次数: 0

From structure to function: Harnessing the ionic conductivity of covalent organic frameworks 从结构到功能：利用共价有机框架的离子传导性

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-02-08 DOI: 10.1002/bkcs.12823

Cong-Xue Liu, Soomin Hwang, Hyerin Woo, Eunsung Lee, Sarah S. Park

{"title":"From structure to function: Harnessing the ionic conductivity of covalent organic frameworks","authors":"Cong-Xue Liu, Soomin Hwang, Hyerin Woo, Eunsung Lee, Sarah S. Park","doi":"10.1002/bkcs.12823","DOIUrl":"https://doi.org/10.1002/bkcs.12823","url":null,"abstract":"Rapid advancements in energy storage technology, driven by a growing demand for energy storage devices, underscore the crucial need to comprehend ionic conduction behavior. Consequently, intensive research on high-performance ionic conductors becomes imperative. Covalent organic frameworks (COFs) have emerged as invaluable materials in the realm of solid-state or quasi-solid-state ion-conduction, leveraging their unique properties such as significant porosity, tunability, and robust physicochemical durability. These distinctive attributes position COFs as promising candidates for the development of electrodes, electrolytes, and separator materials characterized by high capacities, rapid ion transport, and electrochemical stability. This review provides insights into COFs as ionic conductors, discusses recent advancements in COF-based energy storage devices, and explores the influence of structural functionalization, pore size engineering, and dimensional regulation on ionic conduction. Moreover, the review aims to deepen understanding and pave the way for future advancements in the utilization of COFs within energy storage technologies.","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":"45 4","pages":"296-307"},"PeriodicalIF":1.7,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140556200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of diverse aryl-substituted amino propanes 多种芳基取代氨基丙烷的合成

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-02-06 DOI: 10.1002/bkcs.12820

Seyeon Yoo, Sojeong Yi, Hyun-Joon Ha

引用次数: 0

Metal-triggered supramolecular hydrogels based on bipyridine ligand possessing hydrazine moieties with metal ions 基于具有金属离子肼基的联吡啶配体的金属触发超分子水凝胶

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-02-06 DOI: 10.1002/bkcs.12818

Kayeong Go, Sehee Kim, MinHye Kim, Heekyoung Choi, Sung Ho Jung, Jong Hwa Jung

引用次数: 0

Physicochemical characteristics of a nanocomposite film based on purified sodium carboxymethylcellulose and selenium nanoparticles 基于纯化羧甲基纤维素钠和硒纳米颗粒的纳米复合薄膜的理化特性

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-02-06 DOI: 10.1002/bkcs.12813

Khaydar Ergashovich Yunusov, Fozil Mamaraim Ugli Turakulov, Abdushkur Abdukhalilovich Sarymsakov, Sherzod Abdullaevich Yuldoshov, Sayyora Sharafovna Rashidova, Jiang Guohua

{"title":"Physicochemical characteristics of a nanocomposite film based on purified sodium carboxymethylcellulose and selenium nanoparticles","authors":"Khaydar Ergashovich Yunusov, Fozil Mamaraim Ugli Turakulov, Abdushkur Abdukhalilovich Sarymsakov, Sherzod Abdullaevich Yuldoshov, Sayyora Sharafovna Rashidova, Jiang Guohua","doi":"10.1002/bkcs.12813","DOIUrl":"10.1002/bkcs.12813","url":null,"abstract":"In this study, selenium nanoparticles (SeNPs) were synthesized and stabilized by reducing sodium selenite using ascorbic acid in an aqueous solution of sodium carboxymethylcellulose (Na-CMC) with a degree of substitution of 0.97 and a degree of polymerization of 810. IR-Fourier spectroscopy revealed that coordination bonds between functional groups in Na-CMC and SeNPs resulted in the development of polymer-metal complexes. UV–Vis spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), and dynamic light scattering (DLS) methods were used to determine the SeNP sizes in the structure of the nanocomposite film. Investigation of the stabilization and nonstabilization of SeNPs over several cycles has shown that the effect of the polymer matrix of Na-CMC on the stabilization of nanoparticles was achieved for 672 h, which was confirmed by the unchanged size distribution and resistance to change of the SeNPs synthesized in Na-CMC solutions.","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":"45 3","pages":"273-283"},"PeriodicalIF":1.7,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139801508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physicochemical characteristics of a nanocomposite film based on purified sodium carboxymethylcellulose and selenium nanoparticles 基于纯化羧甲基纤维素钠和硒纳米颗粒的纳米复合薄膜的理化特性

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-02-06 DOI: 10.1002/bkcs.12813

K. Yunusov, F. Turakulov, A. Sarymsakov, Sherzod Abdullaevich Yuldoshov, S. Rashidova, Guohua Jiang

引用次数: 0

A theoretical study for the linear free energy relationship of CH bond activation and the role of the axial ligand in cytochrome P450 model complexes 细胞色素 P450 模型复合物中 C?H键活化的线性自由能关系和轴向配体作用的理论研究

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-02-06 DOI: 10.1002/bkcs.12819

Soobin Kwon, Yun-Cheol Choi, Yongho Kim

{"title":"A theoretical study for the linear free energy relationship of CH bond activation and the role of the axial ligand in cytochrome P450 model complexes","authors":"Soobin Kwon, Yun-Cheol Choi, Yongho Kim","doi":"10.1002/bkcs.12819","DOIUrl":"10.1002/bkcs.12819","url":null,"abstract":"Hydrogen abstraction is essential for CH bond activation by Compound I in cytochrome P450 and is influenced by various factors, including spin states, bond dissociation energies of the CH and FeOH bonds, axial ligands, and quantum mechanical tunneling. The role of axial ligands has been extensively studied, but it is still not fully understood. To explore their role, we used density functional theory calculations to determine whether a linear free energy relationship is established for the hydrogen transfer reaction, according to changes in axial ligands. The B3LYP* functional exhibits a strong linear correlation, but the slopes are inconsistent with the characteristics of the transition state. Natural bond orbital analysis reveals no direct orbital interaction between axial ligands and the reaction center of hydrogen transfer. The electron-donating orbitals of the axial ligands weaken the FeO bond, lowering the energy barrier, but they do not directly participate in the intrinsic hydrogen transfer. During the reaction, the FeO bond length increases significantly before the hydrogen transfer itself, generating an asynchronous shift in the bond orders, and most of the activation energy is used for the increase in the FeO bond rather than the hydrogen transfer itself. This study may explain why there is no apparent correlation between the rate constants and the FeO bond strength.","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":"45 3","pages":"284-292"},"PeriodicalIF":1.7,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139772498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0