Reductive carbon dots (CDs) were obtained by a hydrothermal method using citric acid and diethylenetriamine as carbon sources. Three-dimensional Au mesoflowers (3D Au MFs) could be fabricated by directly mixing HAuCl4 and CD solution without using any extra reductant and morphology-directing reagent. The as-obtained 3D Au MFs exhibited high surface-enhanced Raman spectroscopy (SERS) activity in detection of methylene blue.
以柠檬酸和二乙烯三胺为碳源，通过水热法获得了还原性碳点（CD）。将 HAuCl4 与 CD 溶液直接混合，无需使用任何额外的还原剂和形态定向试剂，即可制备出三维金介花（3D Au MFs）。制得的三维金介花在检测亚甲基蓝时具有很高的表面增强拉曼光谱（SERS）活性。
{"title":"Carbon dots as reductants to fabricate three-dimensional Au mesoflowers as SERS substrates","authors":"Chenxu Wang, Zhilong Lin, Wenqin Wang","doi":"10.1093/chemle/upae119","DOIUrl":"https://doi.org/10.1093/chemle/upae119","url":null,"abstract":"\u0000 Reductive carbon dots (CDs) were obtained by a hydrothermal method using citric acid and diethylenetriamine as carbon sources. Three-dimensional Au mesoflowers (3D Au MFs) could be fabricated by directly mixing HAuCl4 and CD solution without using any extra reductant and morphology-directing reagent. The as-obtained 3D Au MFs exhibited high surface-enhanced Raman spectroscopy (SERS) activity in detection of methylene blue.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141695135","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}
Sanhanut Kesornsit, Tsuyoshi Taniguchi, Mai Nozaki, Tatsuya Nishimura, Katsuhiro Maeda
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.
{"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":null,"pages":null},"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}
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.
{"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":null,"pages":null},"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}
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.
{"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":null,"pages":null},"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}
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.
在此，我们报告了一种镍光氧化催化的苯酚与烯基卤化物的立体转化偶联反应，该反应可产生 Z 偶联产物。此外，只需改变溶剂，该反应还能以高立体选择性获得 E-偶联产物。研究发现，改变产物立体异构体的关键因素是光催化剂的荧光寿命。
{"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":null,"pages":null},"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}
Shumma Kozaki, Yao Yuan, Hiroki Ubukata, Zefeng Wei, Tatsuya Tsumori, Shuto Asano, Ken Niwa, Masashi Hasegawa, Hiroshi Kageyama
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.
通过高达 43 GPa 的原位同步辐射 X 射线衍射 (SXRD) 研究了 NbON 氧化物在高压下的结构特性。研究发现，巴氏氮化物的体积模量（290 GPa）大于氧化锆的体积模量（150 GPa），这表明高共价氮的引入带来了更大的刚度。此外，SXRD 图谱显示，在约 20 GPa 以上出现了一个峰值，标志着一种新的结晶相。这与 TaON 形成鲜明对比，后者的衍射图样只显示出 33 GPa 以上的背景增加。第一原理计算表明，高压相采用的是正方晶阳起石型结构，有别于氧化物对应相，后者的常压相通过正方晶 I 结构转变为阳起石结构。
{"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":null,"pages":null},"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}
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.
{"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":null,"pages":null},"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}
Near the plasma/water interface highly active species such as ·OH are formed, providing unique reaction fields. To develop interfacial reaction systems that utilize them, it is important to conduct in-situ quantitative analysis for their supply and consumption kinetics. In this study, depth- and time-resolved in-situ potentiometric measurements were performed to detect redox-active species, such as OH radicals. A Pt electrode employed as an indicator electrode showed a large potential shift to 1.5 V vs SHE only when the depth is less than 10 µm, suggesting the presence of ·OH.
在等离子体/水界面附近会形成高活性物质（如 -OH），从而提供独特的反应场。要开发利用这些物质的界面反应系统，就必须对其供应和消耗动力学进行原位定量分析。本研究采用深度和时间分辨原位电位测量法来检测氧化还原活性物种，如 OH 自由基。作为指示电极的铂电极只有在深度小于 10 µm 时才会出现较大的电位偏移，达到 1.5 V vs SHE，这表明存在-OH。
{"title":"Depth-resolved potentiometric detection of active species near the surface of an aqueous solution under atmospheric pressure plasma","authors":"Kai Kubota, Yuko Yokoyama, Naoya Nishi, T. Sakka","doi":"10.1093/chemle/upae122","DOIUrl":"https://doi.org/10.1093/chemle/upae122","url":null,"abstract":"\u0000 Near the plasma/water interface highly active species such as ·OH are formed, providing unique reaction fields. To develop interfacial reaction systems that utilize them, it is important to conduct in-situ quantitative analysis for their supply and consumption kinetics. In this study, depth- and time-resolved in-situ potentiometric measurements were performed to detect redox-active species, such as OH radicals. A Pt electrode employed as an indicator electrode showed a large potential shift to 1.5 V vs SHE only when the depth is less than 10 µm, suggesting the presence of ·OH.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141341412","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}
P-type Organic Semiconductors, TQx5-BT-DPP8 (1a) and TQx5-BT-DPP20 (1b), consisting of a donor unit of bithiophene (BT) and two acceptor units of thiadiazole quinoxaline (TQx) and diketopyrrolopyrrole (DPP), were synthesized, and their electronic states and physical properties were elucidated. These semiconductors demonstrate strong absorption extending from the visible to the near-infrared region, functioning effectively as strong donor dyes. The organic field-effect transistors (OFETs) exhibited normally on transistor characteristics, with carrier mobilities of 1.1×10−3 cm2/Vs for 1a and 3.3×10−4 cm2/Vs for 1b.
{"title":"Synthesis, Characterization, and OFET Characteristics of p-Type Organic Semiconductors Incorporating Diketopyrrolopyrrole and Thiadiazole-Quinoxaline Acceptors","authors":"Naohiro Takahashi, Tomoki Nishiyama, Weichun Weng, Yuki Miwa, Shinsuke Marumoto, Hirotaka Kitoh-Nishioka, Senku Tanaka, Takashi Okubo","doi":"10.1093/chemle/upae115","DOIUrl":"https://doi.org/10.1093/chemle/upae115","url":null,"abstract":"\u0000 P-type Organic Semiconductors, TQx5-BT-DPP8 (1a) and TQx5-BT-DPP20 (1b), consisting of a donor unit of bithiophene (BT) and two acceptor units of thiadiazole quinoxaline (TQx) and diketopyrrolopyrrole (DPP), were synthesized, and their electronic states and physical properties were elucidated. These semiconductors demonstrate strong absorption extending from the visible to the near-infrared region, functioning effectively as strong donor dyes. The organic field-effect transistors (OFETs) exhibited normally on transistor characteristics, with carrier mobilities of 1.1×10−3 cm2/Vs for 1a and 3.3×10−4 cm2/Vs for 1b.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141346060","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}
The trinuclear Au complex, DT4, demonstrates room-temperature phosphorescence (RTP) in the crystalline state, along with size-dependent polymorphism. The phase transition between the crystal polymorphs of DT4 can be directly observed in real time during crystal growth through changes in RTP color. This study aims to elucidate the crystallization mechanism of DT4, focusing specifically on determining the critical particle size at which crystal-to-crystal phase transitions occur during crystal growth.
{"title":"Unravelling the crystallization mechanism of trinuclear Au complexes through crystal size-dependent luminescence","authors":"Andriani Furoida, Urara Shiina, Kohsuke Matsumoto, Osamu Tsutsumi","doi":"10.1093/chemle/upae121","DOIUrl":"https://doi.org/10.1093/chemle/upae121","url":null,"abstract":"\u0000 The trinuclear Au complex, DT4, demonstrates room-temperature phosphorescence (RTP) in the crystalline state, along with size-dependent polymorphism. The phase transition between the crystal polymorphs of DT4 can be directly observed in real time during crystal growth through changes in RTP color. This study aims to elucidate the crystallization mechanism of DT4, focusing specifically on determining the critical particle size at which crystal-to-crystal phase transitions occur during crystal growth.","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":"141354693","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}
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