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Effect of heat treatment on positive electrode properties and crystal structures of Mo-modified MgMn2O4 热处理对钼改性 MgMn2O4 正极特性和晶体结构的影响
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-12 DOI: 10.1093/chemle/upae117
N. Kitamura, Ryo Noritake, Chiaki Ishibashi, Y. Idemoto
{"title":"Effect of heat treatment on positive electrode properties and crystal structures of Mo-modified MgMn2O4","authors":"N. Kitamura, Ryo Noritake, Chiaki Ishibashi, Y. Idemoto","doi":"10.1093/chemle/upae117","DOIUrl":"https://doi.org/10.1093/chemle/upae117","url":null,"abstract":"\u0000 To improve electrode properties of MgMn2O4 (MMO), which has attracted attention as a positive electrode material for magnesium rechargeable batteries, we performed modification of MMO with a Mo compound and investigated particularly effects of heat-treatment temperature (600-800 °C) in the modification process on the electrode properties and crystal structures. The Mo-modified MMO were successfully synthesized by immersing MMO in an aqueous solution containing Mo ion, followed by the heat treatment. Discharge/charge cycle tests revealed that Mo-modified MMO heat-treated at 700 °C exhibited the highest discharge capacity and cycle characteristics. Crystal-structure analyses using synchrotron X-ray diffraction data showed that the heat treatment at higher temperature could relax the distortion of the crystal structure although it increased an amount of Mg and Mn cation mixing. The crystal-structure change and surface modification with a Mo compound are considered to be the factors for improved positive-electrode properties of MMO.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141352857","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 Characterization of Ligand-introduced [P2W12O44(C6H5PO3)2]10– 配体引入的 [P2W12O44(C6H5PO3)2]10-的合成与表征
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-12 DOI: 10.1093/chemle/upae118
Shumpei Take, T. Minato, M. Sadakane
{"title":"Synthesis and Characterization of Ligand-introduced [P2W12O44(C6H5PO3)2]10–","authors":"Shumpei Take, T. Minato, M. Sadakane","doi":"10.1093/chemle/upae118","DOIUrl":"https://doi.org/10.1093/chemle/upae118","url":null,"abstract":"\u0000 Lacunary polyoxometalates represent a distinctive category of inorganic multidentate ligands that serve as precursors for building organic-inorganic hybrid materials and multinuclear metal oxo clusters. In this study, we successfully synthesized and characterized the organic-inorganic hybrid, [P2W12O44(C6H5PO3)2]10–. Two phenylphosphonato ligands were introduced at both ends of the vacant site to form the unique organic-inorganic-organic structure.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141350871","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
Preparation and degradability of novel cross-linked functional hydrogels from enzymatic synthesized α-1,3-glucan and its carboxymethyl derivative 利用酶法合成的α-1,3-葡聚糖及其羧甲基衍生物制备新型交联功能水凝胶及其降解性
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-12 DOI: 10.1093/chemle/upae120
Zhengyu Su, Haruka Kinoshita, Makoto Ogaito, Yoichi Takeda, Y. Toyotake, Mamoru Wakayama
{"title":"Preparation and degradability of novel cross-linked functional hydrogels from enzymatic synthesized α-1,3-glucan and its carboxymethyl derivative","authors":"Zhengyu Su, Haruka Kinoshita, Makoto Ogaito, Yoichi Takeda, Y. Toyotake, Mamoru Wakayama","doi":"10.1093/chemle/upae120","DOIUrl":"https://doi.org/10.1093/chemle/upae120","url":null,"abstract":"\u0000 In this research, we prepared novel hydrogels from enzymatically synthesized α-1,3-glucan and its carboxymethyl derivative by crosslinking with ethylene glycol diglycidyl ether. The resulting hydrogels were highly swellable and pH-sensitive with an enhanced highly developed structure and showed excellent protein/dye adsorption performances. Furthermore, the hydrogels had good biodegradability and could be degraded in soil extract solution. Herein, the prepared hydrogels have potential applications as a green and environmentally friendly adsorbent for the effective removal of organic dyes in printing and dyeing wastewater.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141350451","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
Visible-light-catalyzed Synthesis of Amino Alcohols from N,N-dimethylaniline and Aryl Aldehyde 可见光催化 N,N-二甲基苯胺和芳基醛合成氨基醇
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-03 DOI: 10.1093/chemle/upae112
Jia-Hui Jin, Yi-Jian Ma, Yu-Yun Yin, Fu-Gang Zhao, Cheng-Shuo Shen, Cheng-Miao Xu, Yong-Miao Shen
{"title":"Visible-light-catalyzed Synthesis of Amino Alcohols from N,N-dimethylaniline and Aryl Aldehyde","authors":"Jia-Hui Jin, Yi-Jian Ma, Yu-Yun Yin, Fu-Gang Zhao, Cheng-Shuo Shen, Cheng-Miao Xu, Yong-Miao Shen","doi":"10.1093/chemle/upae112","DOIUrl":"https://doi.org/10.1093/chemle/upae112","url":null,"abstract":"\u0000 Herein, we describe a direct radical addition reaction of aryl aldehyde and N, N-dimethylaniline using iridium complex as photocatalysts to form amino alcohols under mild conditions, which exhibit an excellent convenient and sustainable methodology. The reaction could be easily scale up through continuous flow with high yield. Mechanism studies with the assistance of DFT calculations indicated such a reaction undertaking a radical pathway.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141270423","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
One-pot synthesis of HKUST-1 monolith for CO2 adsorption 用于二氧化碳吸附的香港科技大学-1 整体石的一步法合成
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-03 DOI: 10.1093/chemle/upae109
Motomu Sakai, Ayaka Ito, Takaya Matsumoto, Masahiko Matsukata
{"title":"One-pot synthesis of HKUST-1 monolith for CO2 adsorption","authors":"Motomu Sakai, Ayaka Ito, Takaya Matsumoto, Masahiko Matsukata","doi":"10.1093/chemle/upae109","DOIUrl":"https://doi.org/10.1093/chemle/upae109","url":null,"abstract":"\u0000 Shape-forming technology is essential for the widespread utilization of metal-organic frameworks. We developed a one-pot synthesis method for HKUST-1 monolith. HKUST-1 monolith was successfully prepared by the hydrothermal treatment of a Cu monolith in an aqueous solution of 1,3,5-benzenetricarboxylic acid, ethanol, and nitric acid without the addition of a metal source. The prepared HKUST-1 monolith showed CO2 adsorption properties comparable to those of commercially available HKUST-1 powdery crystals.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141271114","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
Photocatalytic water splitting over K6M10.8O30 (M = Ta, Nb) with a partially filled tetragonal tungsten bronze structure 具有部分填充四方钨青铜结构的 K6M10.8O30（M = Ta、Nb）的光催化水分离作用
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-03 DOI: 10.1093/chemle/upae110
Misa Moriya, Hideki Kato, Akihide Iwase
{"title":"Photocatalytic water splitting over K6M10.8O30 (M = Ta, Nb) with a partially filled tetragonal tungsten bronze structure","authors":"Misa Moriya, Hideki Kato, Akihide Iwase","doi":"10.1093/chemle/upae110","DOIUrl":"https://doi.org/10.1093/chemle/upae110","url":null,"abstract":"\u0000 K6M10.8O30 (M = Ta, Nb) with partially filled C sites in a tetragonal tungsten bronze structure represented as the general formula (A1)4(A2)2C4M10O30 shows photocatalytic activity for water splitting under UV light irradiation upon loading with suitable cocatalysts. An apparent quantum yield of the optimized NiO(0.2 wt%)-loaded K6Ta10.8O30 for water splitting is 13% at 248 nm.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141271606","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
Substrate-directed novel direct amidation of resin-bound amino acids 底物引导的树脂结合氨基酸新型直接酰胺化反应
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-01 DOI: 10.1093/chemle/upae107
Hiroki Ozasa, H. Mikamiyama, Hisashi Yamamoto
{"title":"Substrate-directed novel direct amidation of resin-bound amino acids","authors":"Hiroki Ozasa, H. Mikamiyama, Hisashi Yamamoto","doi":"10.1093/chemle/upae107","DOIUrl":"https://doi.org/10.1093/chemle/upae107","url":null,"abstract":"\u0000 In peptide drug discovery, the C-terminal structure of peptide compounds is crucial for enhancing the affinity with target proteins and for optimizing the compound's dynamics and physical properties. In conventional solid-phase synthesis, two steps are necessary to modify the C-terminal structure: cleavage from the resin and subsequent amidation involving activation of the resulting carboxylic acid. This process can potentially lead to racemization of the C-terminal amino acid side chain. To address this issue, we developed a novel method that, in the presence of a Ta catalyst, directly allows amines to react with amino acid-loaded resins, thereby accomplishing both resin cleavage and amidation in a single step.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141393140","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
Reaction path search for propane dehydrogenation and metathesis on titanium hydride 氢化钛上丙烷脱氢和偏析反应路径搜索
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-01 DOI: 10.1093/chemle/upae083
Takumi Miyakage, Shunsaku Yasumura, Mengwen Huang, Takashi Toyao, Z. Maeno, Ken-ichi Shimizu
{"title":"Reaction path search for propane dehydrogenation and metathesis on titanium hydride","authors":"Takumi Miyakage, Shunsaku Yasumura, Mengwen Huang, Takashi Toyao, Z. Maeno, Ken-ichi Shimizu","doi":"10.1093/chemle/upae083","DOIUrl":"https://doi.org/10.1093/chemle/upae083","url":null,"abstract":"\u0000 The reaction mechanisms of C3H8 dehydrogenation and subsequent metathesis on a TiH2 surface were investigated using an automated reaction path search method. The predicted pathway suggests that dehydrogenation could occur at the H vacancies present on the TiH2 surface. The propylidene species formed by the initial dehydrogenation reaction are crucial intermediates in butane formation; this compound is in turn required by the subsequent metathesis reaction on the surface of the metal hydrides.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141404968","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
Concise synthetic routes for diphenylacetylene from tetrachloroethylene using Suzuki coupling reaction followed by treatment with n-butyllithium 利用铃木偶联反应并用正丁基锂处理从四氯乙烯制备二苯基乙炔的简明合成路线
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-01 DOI: 10.1093/chemle/upae043
Yuta Fujiki, Hiyono Suzuki, Junya Kikuzawa, Keiji Nishiwaki, N. Kawashita, Junpei Matsuoka, Akira Nakamura, Tomohiro Maegawa, Akiko Kuwabara, Masafumi Kobayashi, Kouichi Matsumoto
{"title":"Concise synthetic routes for diphenylacetylene from tetrachloroethylene using Suzuki coupling reaction followed by treatment with n-butyllithium","authors":"Yuta Fujiki, Hiyono Suzuki, Junya Kikuzawa, Keiji Nishiwaki, N. Kawashita, Junpei Matsuoka, Akira Nakamura, Tomohiro Maegawa, Akiko Kuwabara, Masafumi Kobayashi, Kouichi Matsumoto","doi":"10.1093/chemle/upae043","DOIUrl":"https://doi.org/10.1093/chemle/upae043","url":null,"abstract":"\u0000 We wish to report a new synthetic approach for diphenylacetylene in which tetrachloroethylene was reacted with phenylboronic acid in the presence of Pd catalyst, followed by a workup procedure to provide the crude product, which was then allowed to react with n-butyllithium via the halogen lithium exchange of Cl atom and loss of Li and Cl atoms to afford the desired diphenylacetylene in good yield.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141409504","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
A coarse-grained analysis on coordination self-assembly of a caged dinuclear palladium complex 笼状双核钯配合物配位自组装的粗粒度分析
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-06-01 DOI: 10.1093/chemle/upae099
Yudai Ichikawa, Kanami Sugiyama, Masahiro Higashi, Shuichi Hiraoka, Hirofumi Sato
{"title":"A coarse-grained analysis on coordination self-assembly of a caged dinuclear palladium complex","authors":"Yudai Ichikawa, Kanami Sugiyama, Masahiro Higashi, Shuichi Hiraoka, Hirofumi Sato","doi":"10.1093/chemle/upae099","DOIUrl":"https://doi.org/10.1093/chemle/upae099","url":null,"abstract":"\u0000 We propose a coarse-grained analysis to understand coordination self-assembly. The developed model reduced the system into the assembling components that interact mainly electrostatically. The modeled energies sufficiently reproduced the energy changes to produce a caged di-nuclear palladium complex obtained by the density functional theory. The model made it possible to clarify the physicochemical background of the assembly process.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141410226","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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