Bulletin of the Korean Chemical Society最新文献_第4页

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":"45 7","pages":"631-638"},"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":"45 6","pages":"503-519"},"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

{"title":"Effect of UV-ozone treatment for KCl interlayer in perovskite solar cells","authors":"Na-Yeon Jo, Yun-Kyeong Hong, Sanghee Yang, Hui-Seon Kim","doi":"10.1002/bkcs.12851","DOIUrl":"10.1002/bkcs.12851","url":null,"abstract":"The performance of perovskite solar cells (PSCs) is significantly governed by the interface of perovskite layer. Therefore, a great deal of attention has been paid to the interface engineering of perovskite layer to improve the performance of PSC. In the meantime, KCl is one of the popular molecules being utilized for the interface treatment between SnO2 and perovskite. In this study, we investigate the effect of UV-ozone (UVO) treatment of KCl interlayer on the photovoltaic performance. A device employing UVO-treated KCl shows a higher power conversion efficiency mainly based on an increased open-circuit voltage (VOC). Ultraviolet photoelectron spectroscopy analysis indicates that the UVO treatment induces a rearrangement of energy level at the interface, being responsible for the increase in VOC. Accordingly, an increased charge recombination resistance is evidenced by impedance spectroscopy owing to the inhibited recombination at the SnO2 and perovskite interface by the aid of the aligned energy level.","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":"45 7","pages":"570-575"},"PeriodicalIF":1.7,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bkcs.12851","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140966635","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

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

Narrowing the photoluminescence bandwidth of InP-based colloidal quantum dots through photon-triggered isolation 通过光子触发隔离缩小 InP 基胶体量子点的光致发光带宽

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-05-10 DOI: 10.1002/bkcs.12847

Hyekyeong Kwon, Byeong-Seo Cheong, Jiwon Bang

引用次数: 0

NOE analysis using dual injection DNP-NMR for studies of solvent–solute interactions at low concentrations 利用双注入 DNP-NMR 进行 NOE 分析，研究低浓度溶剂与溶质之间的相互作用

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-05-09 DOI: 10.1002/bkcs.12852

Jihyun Kim

引用次数: 0

Combinatorial entropy determines the early stages of nucleation 组合熵决定成核的早期阶段

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-05-09 DOI: 10.1002/bkcs.12849

Da-Hyun Koo, Ho Jun Park, Jeong-Mo Choi

引用次数: 0

A single-step synthesis of 5,6-dihydropyrrolo[2,1-a]isoquinolines and evaluation of their anti-leukemic activity 5,6-二氢吡咯并[2,1-a]异喹啉的一步合成及其抗白血病活性的评估

IF 1.7 4区化学

Bulletin of the Korean Chemical Society Pub Date : 2024-05-08 DOI: 10.1002/bkcs.12846

Hoyeong Park, Santosh Shivanand Raikar, Min Jeong Ahn, Seong Hwan Kim, Pilho Kim

{"title":"A single-step synthesis of 5,6-dihydropyrrolo[2,1-a]isoquinolines and evaluation of their anti-leukemic activity","authors":"Hoyeong Park, Santosh Shivanand Raikar, Min Jeong Ahn, Seong Hwan Kim, Pilho Kim","doi":"10.1002/bkcs.12846","DOIUrl":"10.1002/bkcs.12846","url":null,"abstract":"While a pharmaceutically intriguing scaffold, 5,6-dihydropyrrolo[2,1-a]isoquinoline (DHPIQ), has precedently been prepared from diverse tetrahydroisoquinolines (THIQs) using elaborate conditions, convenient metal-free methods were discovered from condensation of cyanomethylene-THIQ (1) and α-halo-ketones or aldehydes (1a) to afford 15 DHPIQs (2–16) in moderate yields by employing unique reactivities of the secondary amine and α-carbon to the nitrile of 1. Preliminary biological studies with chronic myelogenous leukemia K562 and adriamycin-resistant K562 (K562/ADM) cells exhibited some of the DHPIQs tested were active in the both cell lines. In particular, cyclohexyl-fused DHPIQ (10) showed GI50 values of 9.79 and 13.60 μM in K562 and K562/ADM cells, respectively. Based on the flow cytometry analysis of 10, the anti-cancer activity could be from apoptosis-related mechanisms. Overall, this DHPIQ scaffold may be further optimized to discover clinically meaningful anti-leukemic agents overcoming adriamycin resistance.","PeriodicalId":54252,"journal":{"name":"Bulletin of the Korean Chemical Society","volume":"45 6","pages":"551-559"},"PeriodicalIF":1.7,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/bkcs.12846","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140998883","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