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Short steps synthesis of unsymmetrical acetylenes from tetrachloroethylene and arylboronic acids using Suzuki coupling reaction and improvement of mild dechlorinations 利用铃木偶联反应短步合成四氯乙烯和芳基硼酸中的不对称乙炔以及改进温和的脱氯反应
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-08-14 DOI: 10.1093/chemle/upae079
Hiyono Suzuki, Akane Togo, Junya Kikuzawa, Kazuki Miyamoto, Shinsuke Marumoto, Akiko Kuwabara, Masafumi Kobayashi, Kouichi Matsumoto
{"title":"Short steps synthesis of unsymmetrical acetylenes from tetrachloroethylene and arylboronic acids using Suzuki coupling reaction and improvement of mild dechlorinations","authors":"Hiyono Suzuki, Akane Togo, Junya Kikuzawa, Kazuki Miyamoto, Shinsuke Marumoto, Akiko Kuwabara, Masafumi Kobayashi, Kouichi Matsumoto","doi":"10.1093/chemle/upae079","DOIUrl":"https://doi.org/10.1093/chemle/upae079","url":null,"abstract":"Short steps synthesis of unsymmetrical acetylenes from tetrachloroethylene and arylboronic acids, and the use of the metal Mg as the mild reagent for dechlorinations has been developed. Unsymmetrical acetylenes including the donor and acceptor diarylacetylenes were produced in good yields. The reaction optimization, scope and limitations, the scale-up reaction, and the evaluation of the step were studied for this paper.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142226440","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 Terminus-Decorated Aza[9]helicenes: Control of Interlayer Interaction 末端蜕变的氮杂[9]螺旋烯的合成：层间相互作用的控制
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-08-12 DOI: 10.1093/chemle/upae159
Yusuke Matsuo, Shu Seki, Takayuki Tanaka
{"title":"Synthesis of Terminus-Decorated Aza[9]helicenes: Control of Interlayer Interaction","authors":"Yusuke Matsuo, Shu Seki, Takayuki Tanaka","doi":"10.1093/chemle/upae159","DOIUrl":"https://doi.org/10.1093/chemle/upae159","url":null,"abstract":"Azahelicenes are intriguing luminescent materials with a planar chirality. The properties of aza[9]helicene can be perturbed by attaching substituent at the termini. The impact of the terminal-decoration has been investigated in view of structural and electronic aspects, leading to the control of interlayer interaction.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208335","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
Polyelectrolyte-assisted uniform electron transporting layer on texture substrate for perovskite solar cells 用于过氧化物太阳能电池的质地衬底上的聚电解质辅助均匀电子传输层
IF 1.4 4区 化学
Chemistry Letters Pub Date : 2024-08-09 DOI: 10.1093/chemle/upae158
Ryo Ishikawa
{"title":"Polyelectrolyte-assisted uniform electron transporting layer on texture substrate for perovskite solar cells","authors":"Ryo Ishikawa","doi":"10.1093/chemle/upae158","DOIUrl":"https://doi.org/10.1093/chemle/upae158","url":null,"abstract":"\u0000 Organic-inorganic halide perovskite solar cells using textured transparent conductive films exhibit high efficiencies with improved short-circuit current density. However, uniform electron transport layer (ETL) deposition on textures by solution process is challenging. In this study, uniform ETL were formed by sequentially spin-coating polyelectrolyte with positively and negatively charged segments and negative SnO2 colloids solution and electrostatically enhancing the SnO2 coverage. The stabilized power output (SPO) was improved from 12.9% to 18.6% by incorporating this polyelectrolyte/SnO2 bilayer.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141924481","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
Development of diazirine–alkyne tag for protein–ligand interaction analysis with photoaffinity labeling 开发重氮烷基标签，利用光亲和标记分析蛋白质与配体的相互作用
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-08-08 DOI: 10.1093/chemle/upae142
Masatoshi Nakatani, Shohei Ebihara, Masaki Kita
{"title":"Development of diazirine–alkyne tag for protein–ligand interaction analysis with photoaffinity labeling","authors":"Masatoshi Nakatani, Shohei Ebihara, Masaki Kita","doi":"10.1093/chemle/upae142","DOIUrl":"https://doi.org/10.1093/chemle/upae142","url":null,"abstract":"We have developed a diazirine–alkyne tag for target protein–ligand interaction analysis. A sulfonamide photoaffinity probe was readily prepared using copper-catalyzed azide–alkyne cycloaddition (CuAAC), which site-specifically formed a covalent bond with human carbonic anhydrase 1 (∼30% labeling yield). The photolabeled position (E58–H64 region) was determined based on the results of a tandem mass spectrometry (MS/MS) analysis of tryptic peptides and was supported by molecular modeling studies. Our method may be useful for determining unknown ligand-binding sites of various target biomolecules.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949054","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 ε-NbN and δ-NbN by metathesis reaction of NaNbO3 and BN 通过 NaNbO3 和 BN 的偏合成反应合成 ε-NbN 和 δ-NbN
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-08-08 DOI: 10.1093/chemle/upae154
Tenshin Osaka, Toshiya Ikenobe, Zenji Hiroi, Hisanori Yamane, Takahiro Yamada
{"title":"Synthesis of ε-NbN and δ-NbN by metathesis reaction of NaNbO3 and BN","authors":"Tenshin Osaka, Toshiya Ikenobe, Zenji Hiroi, Hisanori Yamane, Takahiro Yamada","doi":"10.1093/chemle/upae154","DOIUrl":"https://doi.org/10.1093/chemle/upae154","url":null,"abstract":"δ-NbN powder with particles of approximately 1 µm in size was obtained by heating a mixture of NaNbO3 and BN powders at 1373 K for 1 h, while agglomerates composed of ε-NbN platelet grains up to 50 µm in size were obtained by heating the mixture at the same temperature for 10 h. Metathesis reaction in which sodium borate was formed with replacement of the oxygen and nitrogen from NaNbO3 and BN occurred with the NbN formation. Wavelength-dispersive X-ray analysis showed that the molar ratios of Nb to N in the synthesized δ-NbN and ε-NbN were approximately 1:1. Magnetic susceptibility measurements showed that the δ-NbN powder was a superconductor with a transition temperature of approximately 16 K. In comparison, the ε-NbN agglomerates did not exhibit superconductivity above 2 K.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949053","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
Precise Synthesis of Ligand-Protected Metal Nanoclusters for Electrochemical/Photoelectrochemical Applications 用于电化学/光电化学应用的配体保护金属纳米团簇的精确合成
IF 1.4 4区 化学
Chemistry Letters Pub Date : 2024-08-08 DOI: 10.1093/chemle/upae155
T. Kawawaki, Yuichi Negishi
{"title":"Precise Synthesis of Ligand-Protected Metal Nanoclusters for Electrochemical/Photoelectrochemical Applications","authors":"T. Kawawaki, Yuichi Negishi","doi":"10.1093/chemle/upae155","DOIUrl":"https://doi.org/10.1093/chemle/upae155","url":null,"abstract":"\u0000 Ligand-protected metal nanoclusters (NCs) represent a significant advancement in the field of catalysis due to their unique size-specific electronic and geometric structures. These properties are highly dependent on the metal species, number of constituent atoms, and geometric structure of the metal NC. We discuss on the synthesis, stability, structural characterization, and electrocatalytic/photocatalytic applications of these fascinating materials, emphasizing their superior performance over conventional catalysts. In this study, we have obtained a deeper understanding of the interaction between the metal core and the organic ligands protecting the metal NCs, as well as the desorption behavior of the ligands under calcination, which is crucial for the application of metal NCs as heterogeneous catalysts. Based on this understanding, we have demonstrated that metal NCs-supported catalysts with appropriate pretreatment exhibit higher activity as photocatalysts compared to conventional catalysts. Moreover, by suppressing oxygen poisoning through the use of sulfur species in the ligands, Pt NCs showed high activity as cocatalysts for photocatalytic hydrogen evolution in water splitting. Additionally, atomically precised phosphine-protected Pt NCs exhibited high activity as cathode electrocatalysts for fuel cells. These findings are expected to significantly contribute to the development of more diverse catalysts based on metal NCs, including those with varying metal species, numbers of constituent atoms, and geometric structures.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141927183","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
Anion effects on the structure and stability of 3D domain-swapped cytochrome c dimer 阴离子对三维结构域互换的细胞色素 c 二聚体的结构和稳定性的影响
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-08-02 DOI: 10.1093/chemle/upae150
Kodai Fujiwara, Michiko Ryuzaki, Masaru Yamanaka, Tsuyoshi Mashima, Tomonori Saotome, Shun-ichi Kidokoro, Shun Hirota
{"title":"Anion effects on the structure and stability of 3D domain-swapped cytochrome c dimer","authors":"Kodai Fujiwara, Michiko Ryuzaki, Masaru Yamanaka, Tsuyoshi Mashima, Tomonori Saotome, Shun-ichi Kidokoro, Shun Hirota","doi":"10.1093/chemle/upae150","DOIUrl":"https://doi.org/10.1093/chemle/upae150","url":null,"abstract":"The structure and stability of proteins are affected by ions. We have previously reported that cytochrome c can form a 3D domain-swapped dimer. The structure of the cytochrome c domain-swapped dimer becomes more compact in the presence of kosmotropic anions, whereas the thermal stability of the dimer decreased with addition of chaotropic anions based on the Hofmeister series. Dimers were formed by incubating cytochrome c at 50 °C in the presence of citrate ions.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141881290","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
[Ti]-YNU-5: a large-pore titanosilicate as an efficient catalyst for selective oxidations [钛]-YNU-5：作为选择性氧化高效催化剂的大孔钛硅酸盐
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-07-27 DOI: 10.1093/chemle/upae130
Shengxiang Zhang, Kai Asanuma, Satoshi Inagaki, Yoshihiro Kubota
{"title":"[Ti]-YNU-5: a large-pore titanosilicate as an efficient catalyst for selective oxidations","authors":"Shengxiang Zhang, Kai Asanuma, Satoshi Inagaki, Yoshihiro Kubota","doi":"10.1093/chemle/upae130","DOIUrl":"https://doi.org/10.1093/chemle/upae130","url":null,"abstract":"A novel large-pore titanosilicate with YFI topology, [Ti]-YNU-5, was prepared via post-synthetic isomorphous substitution of Ti for Al in the YFI framework. It exhibited the enhanced catalytic performances in the liquid-phase epoxidation of bulky alkenes and the oxidation of phenol with hydrogen peroxide. Hydrophobicity was found to be an important factor.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141770580","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
Trans-Selective Carboxylative Cyclization of 1,6-Dienes Using the CO2 Radical Anion 利用二氧化碳自由基阴离子对 1,6-二烯进行反选择性羧基环化反应
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-07-27 DOI: 10.1093/chemle/upae149
Yan Song, Hiroki Hayashi, Saeesh R Mangaonkar, Tsuyoshi Mita
{"title":"Trans-Selective Carboxylative Cyclization of 1,6-Dienes Using the CO2 Radical Anion","authors":"Yan Song, Hiroki Hayashi, Saeesh R Mangaonkar, Tsuyoshi Mita","doi":"10.1093/chemle/upae149","DOIUrl":"https://doi.org/10.1093/chemle/upae149","url":null,"abstract":"The reactivity of the carbon dioxide radical anion (CO2•−) toward alkenes has garnered remarkable attention owing to its potential to synthesize valuable organic compounds. Herein, we report the reactions between CO2•− and 1,6-dienes, yielding 5-membered lactam derivatives via highly trans-selective 5-exo-trig cyclization. Both carboxylative cyclization and hydrocyclization occur with up to 74% combined yield. Computational studies show that the transition state during cyclization favors the trans-configuration over cis. This work offers new insights into the synthesis of N-heterocycles.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141770579","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
Electrochemical Synthesis of Heterocyclic Compounds via Carbon–Heteroatom Bond Formation: Direct and Indirect Electrolysis 通过碳-杂原子键形成电化学合成杂环化合物：直接和间接电解
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-07-27 DOI: 10.1093/chemle/upae146
Yasuyuki Okumura, Eisuke Sato, Koichi Mitsudo, Seiji Suga
{"title":"Electrochemical Synthesis of Heterocyclic Compounds via Carbon–Heteroatom Bond Formation: Direct and Indirect Electrolysis","authors":"Yasuyuki Okumura, Eisuke Sato, Koichi Mitsudo, Seiji Suga","doi":"10.1093/chemle/upae146","DOIUrl":"https://doi.org/10.1093/chemle/upae146","url":null,"abstract":"Electrochemical organic synthesis has attracted attention as an environmentally friendly method for constructing heterocyclic compounds via carbon–heteroatom bond formation. Herein, we describe the representative examples of electrochemical reactions to produce heterocycles, and discuss them according to whether they involve direct or indirect electrolysis.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141770584","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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