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Synthesis of a Symmetrically meta-Substituted Poly(diphenylacetylene) Bearing Chiral Amide Groups and Its Application as a Chiral Stationary Phase for HPLC 含有手性酰胺基团的对称元取代聚（二苯基乙炔）的合成及其在高效液相色谱手性固定相中的应用
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-07-01 DOI: 10.1093/chemle/upae129
Sanhanut Kesornsit, Tsuyoshi Taniguchi, Mai Nozaki, Tatsuya Nishimura, Katsuhiro Maeda
{"title":"Synthesis of a Symmetrically meta-Substituted Poly(diphenylacetylene) Bearing Chiral Amide Groups and Its Application as a Chiral Stationary Phase for HPLC","authors":"Sanhanut Kesornsit, Tsuyoshi Taniguchi, Mai Nozaki, Tatsuya Nishimura, Katsuhiro Maeda","doi":"10.1093/chemle/upae129","DOIUrl":"https://doi.org/10.1093/chemle/upae129","url":null,"abstract":"A symmetrically meta-substituted poly(diphenylacetylene) bearing chiral amide groups was synthesized by reacting (R)-1-phenylethylamine with a carboxy-group-containing precursor polymer, which was obtained by polymerizing the corresponding ester-containing diphenylacetylene using a modified Mo(V)-based catalytic system followed by hydrolysis. The polymer formed a one-handed helical conformation when thermally annealed in a solvent. The chiral recognition ability of the polymer before and after thermal annealing was investigated when used as a chiral stationary phase for high-performance liquid chromatography.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"8 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502675","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
Solvated Ba2+ with square antiprismatic and cubic coordination geometries 具有方形反方和立方配位几何结构的溶解 Ba2+
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-28 DOI: 10.1093/chemle/upae126
Ayano Umakoshi, Takuo Minato, Yusuke Kanematsu, Masahiro Sadakane
{"title":"Solvated Ba2+ with square antiprismatic and cubic coordination geometries","authors":"Ayano Umakoshi, Takuo Minato, Yusuke Kanematsu, Masahiro Sadakane","doi":"10.1093/chemle/upae126","DOIUrl":"https://doi.org/10.1093/chemle/upae126","url":null,"abstract":"Solvated metal cations represent fundamental and crucial mononuclear species in various research fields, including chemical, physical, and biochemical studies. However, controlling their coordination geometry poses a significant challenge. In this study, we successfully synthesized and structurally characterized solvated Ba2+ complexes. The coordination geometry of [Ba(CH3CN)8]2+ was a thermodynamically stable square antiprism, while that of [Ba{(CH3)2CO}8]2+ exhibited a rare cubic structure, demonstrating a unique approach to controlling coordination geometry solely by altering crystallization solvents.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"1 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502677","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
Chain-length dependence in adsorption of perfluoroalkylcarboxylic acid on vesicles composed of amphiphiles with two bent hydrophobic chains 全氟烷基羧酸在具有两条弯曲疏水链的双亲化合物构成的囊泡上的吸附与链长有关
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-26 DOI: 10.1093/chemle/upae106
Hatsuho Usuda, Takahiro Toyoshima, Yoshie Mishima, Koji Sakurai, Chieko Takamura, Akira Takahashi, Kimitaka Minami, Tohru Kawamoto
{"title":"Chain-length dependence in adsorption of perfluoroalkylcarboxylic acid on vesicles composed of amphiphiles with two bent hydrophobic chains","authors":"Hatsuho Usuda, Takahiro Toyoshima, Yoshie Mishima, Koji Sakurai, Chieko Takamura, Akira Takahashi, Kimitaka Minami, Tohru Kawamoto","doi":"10.1093/chemle/upae106","DOIUrl":"https://doi.org/10.1093/chemle/upae106","url":null,"abstract":"Per- and polyfluoroalkyl substances (PFAS) are widely used but can have harmful effects on the human body. Activated carbon has been used to remove PFAS from water; however, vesicles consisting of amphiphiles are adsorbent candidates. Optimization of PFAS adsorption using vesicles has not yet been achieved. We analyzed the chain-length dependence of perfluorocarboxylic acid (PFCA) adsorption on vesicles composed of amphiphiles with two bent hydrophobic chains containing cis-double bonds to reveal the interaction between vesicles and PFCA.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"84 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502678","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
Nickel-photoredox-catalyzed E- and Z-stereoconvergent coupling of alkenyl halides and phenols 镍光氧化催化烯基卤化物和苯酚的 E 和 Z 立体转化偶联反应
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-25 DOI: 10.1093/chemle/upae111
Sodai Nishino, Takuya Kurahashi
{"title":"Nickel-photoredox-catalyzed E- and Z-stereoconvergent coupling of alkenyl halides and phenols","authors":"Sodai Nishino, Takuya Kurahashi","doi":"10.1093/chemle/upae111","DOIUrl":"https://doi.org/10.1093/chemle/upae111","url":null,"abstract":"Herein, we report a Ni-photoredox-catalyzed stereoconvergent coupling of phenols and alkenyl halides, which affords a Z-coupling product. Moreover, by simply changing the solvent, the reaction also provides access to the E-coupling product with high stereoselectivity. The key factor for changing the stereoisomer of the product was found to be the fluorescence lifetime of photocatalyst.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"74 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141518757","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
High-pressure X-ray study of NbON oxynitride: direct transition from baddeleyite to cotunnite structure 氧化铌氮化物的高压 X 射线研究：从巴德利特结构直接过渡到阳起石结构
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-24 DOI: 10.1093/chemle/upae113
Shumma Kozaki, Yao Yuan, Hiroki Ubukata, Zefeng Wei, Tatsuya Tsumori, Shuto Asano, Ken Niwa, Masashi Hasegawa, Hiroshi Kageyama
{"title":"High-pressure X-ray study of NbON oxynitride: direct transition from baddeleyite to cotunnite structure","authors":"Shumma Kozaki, Yao Yuan, Hiroki Ubukata, Zefeng Wei, Tatsuya Tsumori, Shuto Asano, Ken Niwa, Masashi Hasegawa, Hiroshi Kageyama","doi":"10.1093/chemle/upae113","DOIUrl":"https://doi.org/10.1093/chemle/upae113","url":null,"abstract":"The structural properties of NbON oxynitride under high pressure were investigated through in situ synchrotron X-ray diffraction (SXRD) up to 43 GPa. It was found that the bulk modulus of baddeleyite NbON (290 GPa) is larger than that of ZrO2 (150 GPa), indicating that the introduction of highly covalent nitrogen imparts greater stiffness. Furthermore, SXRD patterns reveal the emergence of a peak signaling a new crystalline phase above around 20 GPa. This is in contrast to TaON, where diffraction patterns only show an increase in background beyond 33 GPa. First-principle calculations suggest that the high-pressure phase adopts an orthorhombic cotunnite-type structure, distinguishing it from the oxide counterparts, wherein the ambient pressure phase transforms to a cotunnite structure via an orthorhombic-I structure.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"42 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502679","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
Efficient Inactivation of Influenza Virus Through Adsorption of Nanoceria and its Oxidative Power 通过吸附纳米铈及其氧化能力高效灭活流感病毒
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-21 DOI: 10.1093/chemle/upae124
Shota Sekiguchi, Eisuke Umezawa, Hiroko Ito Yamanaka, Kan Fujino, Takahiro Motoshiromizu, Miho Kawanishi Ouchi, Shunsuke Murai, Tomohide Masuda, Masateru Ito, Hitoshi Nobumasa, Satoshi Taharaguchi
{"title":"Efficient Inactivation of Influenza Virus Through Adsorption of Nanoceria and its Oxidative Power","authors":"Shota Sekiguchi, Eisuke Umezawa, Hiroko Ito Yamanaka, Kan Fujino, Takahiro Motoshiromizu, Miho Kawanishi Ouchi, Shunsuke Murai, Tomohide Masuda, Masateru Ito, Hitoshi Nobumasa, Satoshi Taharaguchi","doi":"10.1093/chemle/upae124","DOIUrl":"https://doi.org/10.1093/chemle/upae124","url":null,"abstract":"This study investigated the stabilizer's impact on nanoceria's antiviral activity. The positively charged nanoceria dispersion showed potent activity against the influenza virus, reducing the viral titer by over 4.0 log10 pfu/mL within 1 h, surpassing EN14476 criteria. It also inactivated the virus within 15 s, decreasing the infection titer by 2.2 log10 pfu/mL, and maintained efficacy even under bovine serum albumin loading.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"17 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141518758","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
Encapsulation of silver nanoplates into poly(lactic-co-glycolic) acid nanoparticles and the antibacterial activity against intracellular bacteria 聚（乳酸-共聚乙醇）酸纳米粒子中的银纳米粒子封装及其对细胞内细菌的抗菌活性
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-05-31 DOI: 10.1093/chemle/upae084
Ryoko Nawata, Sayo Maruyama, Wei Xu, Takuro Niidome
{"title":"Encapsulation of silver nanoplates into poly(lactic-co-glycolic) acid nanoparticles and the antibacterial activity against intracellular bacteria","authors":"Ryoko Nawata, Sayo Maruyama, Wei Xu, Takuro Niidome","doi":"10.1093/chemle/upae084","DOIUrl":"https://doi.org/10.1093/chemle/upae084","url":null,"abstract":"We encapsulated silver nanoplates (AgNPLs) into poly(lactic-co-glycolic) acid (PLGA) nanoparticles. The encapsulation stabilized the AgNPLs in a physiological environment and the antibacterial activity of the AgNPLs against planktonic bacteria was reduced. However, the PLGA nanoparticles encapsulating the AgNPLs were internalized into macrophages and showed antibacterial activity against intracellular bacteria. AgNPL-loaded PLGA nanoparticles are promising for treating intractable infectious diseases caused by bacteria-infecting macrophages.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"26 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141255245","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
Ni-photoredox-catalyzed amide arylation reaction using amidyl radical formation via PCET 通过 PCET 形成酰胺基，利用镍光氧催化酰胺芳基化反应
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-05-30 DOI: 10.1093/chemle/upae088
Sodai Nishino, Takuya Kurahashi
{"title":"Ni-photoredox-catalyzed amide arylation reaction using amidyl radical formation via PCET","authors":"Sodai Nishino, Takuya Kurahashi","doi":"10.1093/chemle/upae088","DOIUrl":"https://doi.org/10.1093/chemle/upae088","url":null,"abstract":"Herein, we report the N-arylation of amides based on the formation of N-centered amidyl radicals via proton-coupled electron transfer (PCET) using a nickel–photoredox dual catalyst. The reaction achieved arylation of sterically hindered linear secondary amides under mild conditions. Control experiments with radical inhibitors suggested the formation of amidyl radicals via the PCET mechanism.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"37 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141255382","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 and Properties of 1,3-Dithiole[6]dendralene Analogs with Two Thiophene Spacers Inserted 插入两个噻吩间隔物的 1,3-二硫代[6]树枝烯类似物的合成及其特性
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-05-30 DOI: 10.1093/chemle/upae104
Tomoya Misaki, Masataka Nishiwaki, Toshiki Ito, Masafumi Ueda, Masahiro Fujisaki, Aya Yoshimura, Takashi Shirahata, Minoru Hayashi, Yohji Misaki
{"title":"Synthesis and Properties of 1,3-Dithiole[6]dendralene Analogs with Two Thiophene Spacers Inserted","authors":"Tomoya Misaki, Masataka Nishiwaki, Toshiki Ito, Masafumi Ueda, Masahiro Fujisaki, Aya Yoshimura, Takashi Shirahata, Minoru Hayashi, Yohji Misaki","doi":"10.1093/chemle/upae104","DOIUrl":"https://doi.org/10.1093/chemle/upae104","url":null,"abstract":"Derivatives of a 1,3-dithiole[6]dendralene analog with two thiophene spacers inserted (2) have been successfully synthesized. Cyclic voltammetry and spectroelectrochemistry revealed that their redox behavior, based on the distribution of the positive charges, differed depending on the position and the electronic effect of substituents on the 1,3-dithiole rings.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"27 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141257069","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
CSIML: a cost-sensitive and iterative machine-learning method for small and imbalanced materials data sets CSIML：针对小型不平衡材料数据集的成本敏感迭代机器学习方法
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-05-30 DOI: 10.1093/chemle/upae090
Shengzhou Li, Ayako Nakata
{"title":"CSIML: a cost-sensitive and iterative machine-learning method for small and imbalanced materials data sets","authors":"Shengzhou Li, Ayako Nakata","doi":"10.1093/chemle/upae090","DOIUrl":"https://doi.org/10.1093/chemle/upae090","url":null,"abstract":"Materials science research benefits from the powerful machine-learning (ML) surrogate models, but it is also limited by the implicit requirement for sufficiently big and balanced data distribution for ML. In this paper, we propose a model to obtain more credible results for small and imbalanced materials data sets as well as chemical knowledge. Taking 2 bandgaps imbalanced data sets as instances, we demonstrate the usability and performance of our model compared with common ML models with normal sampling and resampling methods.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"67 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141256668","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
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