Bulletin of the Korean Chemical Society最新文献_第2页

Post-synthetic modifications of MOF-74 type frameworks for enhancing CO2 capture and moisture stability 对 MOF-74 型框架进行后合成修饰以提高二氧化碳捕获能力和湿度稳定性

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-06-18 DOI: 10.1002/bkcs.12885

Jintu Francis Kurisingal, Jong Hyeak Choe, Hyojin Kim, Jeongwon Youn, Gayoung Cheon, Chang Seop Hong

引用次数: 0

Vapor-phase synthesis of MOF films 气相合成 MOF 薄膜

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-06-18 DOI: 10.1002/bkcs.12854

Myeonggeun Choe, Hyeonwoo Lee, Hee Cheul Choi

引用次数: 0

Synthesis and characterization of Mo and W compounds for disulfide materials 二硫化物材料中 Mo 和 W 化合物的合成与表征

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-06-14 DOI: 10.1002/bkcs.12880

Sunyoung Shin, Seongmin Yeo, So Jeong Yeo, Taek-Mo Chung, Chang Gyoun Kim, Bo Keun Park

{"title":"Synthesis and characterization of Mo and W compounds for disulfide materials","authors":"Sunyoung Shin, Seongmin Yeo, So Jeong Yeo, Taek-Mo Chung, Chang Gyoun Kim, Bo Keun Park","doi":"10.1002/bkcs.12880","DOIUrl":"10.1002/bkcs.12880","url":null,"abstract":"MoS2 and WS2 are spotlighted as fungible materials of graphene that can be used in electronic devices owing to being semiconductors with indirect and direct band gaps. Precursors (Mo(NtBu)2(StBu)2 (1), W(NtBu)2(StBu)2 (2)) suitable for the deposition of these materials were synthesized and characterized. The molecular structures of 1 and 2 exhibit a tetrahedral geometry according to single-crystal x-ray crystallography. Thermogravimetric analyses of 1 and 2 showed two-step weight loss. The residues from each step of 1 were MoS3 and MoS2, and these results were consistent with the subsequent deposition results of 1. We successfully established a PEALD-MoS2 process using 1 and H2S plasma as the precursor and reactant, respectively, at relatively low temperatures of 150–300 °C without any post-sulfurization process. A temperature-dependent selective deposition of MoSx phases was observed with the growth of amorphous MoS3 films (150–200 °C), and crystalline MoS2 films (250–350 °C).","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141338423","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

Enhancing the durability of anion exchange membrane water electrolysis cells via interfacial membrane–ionomer crosslinking 通过界面膜-阴离子交联提高阴离子交换膜电解水电池的耐用性

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-06-06 DOI: 10.1002/bkcs.12881

Yerim Lee, Wooseok Lee, Tae-Hyun Kim

{"title":"Enhancing the durability of anion exchange membrane water electrolysis cells via interfacial membrane–ionomer crosslinking","authors":"Yerim Lee, Wooseok Lee, Tae-Hyun Kim","doi":"10.1002/bkcs.12881","DOIUrl":"10.1002/bkcs.12881","url":null,"abstract":"Research into enhancing the performance and durability of anion exchange membrane (AEM)-based water electrolysis (AEMWE) cells has primarily aimed to facilitate commercialization efforts and improve the chemical stability of AEMs, with anion exchange ionomers (AEIs) playing an increasingly important role. This study aimed to reduce ionomer swelling and enhance AEM–catalyst adhesion via AEM–ionomer crosslinking within a membrane electrode assembly (MEA), using allyl- and quaternary ammonium-functionalized poly(phenylene oxide) (PPO), allyl-m-PPO, as both the AEM and AEI. Bis(aryl azide) was added as a crosslinker to an ionomer solution to generate the MEA, which was heated to induce allyl–azide crosslinks at the membrane–ionomer interface. Peel test indicated an increased adhesion at both electrodes for the crosslinked x-allyl-0.05-PPO (5 mol% allyl content relative to the total ion-conducting head group content). Further, x-allyl-0.05-PPO exhibited a smaller voltage increase due to crosslinking compared to TA-PPO, signifying a notable improvement in durability.","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bkcs.12881","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141378219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sequential-dip-coating processed mixed organic and inorganic perovskite film from halide-free lead precursor for efficient perovskite solar cells 利用无卤铅前驱体进行序贯浸镀膜处理的有机和无机混合过氧化物薄膜，用于制造高效过氧化物太阳能电池

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-06-04 DOI: 10.1002/bkcs.12882

Zobia Irshad, Muhammad Adnan, Ho-Joong Kim, Jae Kwan Lee

{"title":"Sequential-dip-coating processed mixed organic and inorganic perovskite film from halide-free lead precursor for efficient perovskite solar cells","authors":"Zobia Irshad, Muhammad Adnan, Ho-Joong Kim, Jae Kwan Lee","doi":"10.1002/bkcs.12882","DOIUrl":"10.1002/bkcs.12882","url":null,"abstract":"A novel all-sequential-dip-coated (SDC) deposited FA1MA1−yPbI3−xBrx perovskite films have been synthesized from an aqueous non-halide lead precursor towards an environmentally benign, cost-effective, and efficient approach for high-performance perovskite solar cells (PrSCs). The mixed-cationic FA1MA1−yPbI3−xBrx perovskite layers ensure the fractional incorporation of Br into the perovskite crystal lattice. The insertion of Br contents was regulated by modulating the FABr concentration into the FABr/MAI mixed-cationic precursor solution. The incorporation of minor FABr into MAI helps to improve the surface coverage and crystallinity of the synthesized per-ovskite layer in contrast to the other perovskite films prepared with higher FABr content under the same environment. The PrSCs with these FA1MA1−yPbI3−xBrx perovskite layers displayed good de-vice performances and stability with a PCE of 11.1%. These outcomes reveal that the synthesis of FA1MA1−yPbI3−xBrx perovskite films with the SDC approach is more efficient because of the use of environmentally benign solvents for synthesizing lead and perovskite layers.","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141387558","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

Redox reactivity of LMCT and MLCT excited states of Earth-abundant metal complexes 富地球金属配合物的 LMCT 和 MLCT 激发态的氧化还原反应性

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-05-31 DOI: 10.1002/bkcs.12850

Wonwoo Nam, Yong-Min Lee, Shunichi Fukuzumi

{"title":"Redox reactivity of LMCT and MLCT excited states of Earth-abundant metal complexes","authors":"Wonwoo Nam, Yong-Min Lee, Shunichi Fukuzumi","doi":"10.1002/bkcs.12850","DOIUrl":"https://doi.org/10.1002/bkcs.12850","url":null,"abstract":"Precious metal complexes, which act as excellent photoredox catalysts, have now being replaced by earth-abundant metal complexes. This review focused on redox reactivity of ligand-to-metal charge transfer (LMCT) and metal-to-ligand charge transfer (MLCT) excited states of earth-abundant metal complexes. Iron complexes with strongly σ-donating NHC-ligands (NHC = N-heterocyclic carbene) has emerged, featuring long lived LMCT excited states due to a significantly increased barrier for deactivation via metal centered states. A Fe(III)-NHC complex acts as an effective photoredox catalyst for various photocatalytic redox reactions. Although manganese(IV)-oxo complexes have no long-lived excited states (τ < < 1 ns). Once acids such as Sc(OTf)3 and HOTf are bound to the oxo moiety of Mn(IV)-oxo complexes, the photoexcitation of acid-bound Mn(IV)-oxo complexes resulted in formation of the excited states with microseconds lifetimes, which are capable of oxidation of substrates including benzene to phenol. Photoexcited states of Mn(III), Mn(II) and Mn(I) complexes act as photoreductants to reduce substrates including O2. On the other hand, photoexcited states of Co(IV) and Co(III) complexes act as photooxidants, whereas those of Co(II) and Co(I) complexes act as photoreductants. With regard to the excited state lifetime, [Cr(tpe)2]3+ (tpe = 1,1,1-tris(pyrid-2-yl)ethane) exhibited the longest luminescence lifetime (τ = 4500 μs), acting as an effective photoredox catalyst for photocatalytic redox reactions. The LMCT state of a Cr(0) complex acts as a super photoreductant. Thus, LMCT and MLCT excited states of earth-abundant metal complexes are utilized as strong photooxidants and photoreductants, respectively.","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141430178","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

NMR spectroscopic investigations of transition metal complexes in organometallic and bioinorganic chemistry 有机金属和生物无机化学中过渡金属配合物的核磁共振光谱研究

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-05-28 DOI: 10.1002/bkcs.12853

Jeongcheol Shin, Mi Hee Lim, Jiyeon Han

引用次数: 0

Cover Picture: Trifluoroacetyl-effect on amino-single benzene-based fluorophores: Synthesis, optical properties, and cytotoxicity (BKCS 5/2024) Ji Hye Jin, Dopil Kim, Jisoo Kang, Sangho Lee, Jong Min An, Min Kim, Dokyoung Kim 封面图片：氨基单苯基荧光团的三氟乙酰效应：合成、光学性质和细胞毒性 (BKCS 5/2024) Ji Hye Jin, Dopil Kim, Jisoo Kang, Sangho Lee, Jong Min An, Min Kim, Dokyoung Kim

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-05-23 DOI: 10.1002/bkcs.12735

引用次数: 0

Effect of UV-ozone treatment for KCl interlayer in perovskite solar cells 紫外线-臭氧处理对过氧化物太阳能电池中 KCl 夹层的影响

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-05-16 DOI: 10.1002/bkcs.12851

Na-Yeon Jo, Yun-Kyeong Hong, Sanghee Yang, Hui-Seon Kim

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Droplet microfluidics for single-molecule and single-cell analysis in research, diagnosis, and therapy 用于研究、诊断和治疗中单分子和单细胞分析的液滴微流控技术

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-05-16 DOI: 10.1002/bkcs.12848

Joel Sanchez Barea, Dong-Ku Kang

引用次数: 0