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Microstructure of monolayered aggregate of 5-(4-carboxyphenyl)-10,15,20-triphenylporphine self-assembled at the toluene/water interface 在甲苯/水界面自组装的 5-(4-羧基苯基)-10,15,20-三苯基卟吩单层聚合体的微观结构
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-07-10 DOI: 10.1093/chemle/upae108
Tania Avianda Gusman, Satoshi Tsukahara
{"title":"Microstructure of monolayered aggregate of 5-(4-carboxyphenyl)-10,15,20-triphenylporphine self-assembled at the toluene/water interface","authors":"Tania Avianda Gusman, Satoshi Tsukahara","doi":"10.1093/chemle/upae108","DOIUrl":"https://doi.org/10.1093/chemle/upae108","url":null,"abstract":"5-(4-Carboxyphenyl)-10,15,20-triphenylporphine (TPPCOOH) was acid-dissociated and its salt with alkali metal ions (TPPCOO−M+, M+=Li+, Na+, and K+) formed ordered needlelike monolayered aggregates at the toluene/water interface under alkaline conditions. The light absorption of the aggregates at 451 nm depended on the polarization direction. The dependence revealed 2 types of TPPCOO−M+ aggregates with different growth direction, but their microstructure and interfacial concentration were almost the same. The height of the aggregates measured by atomic force microscopy was approximately equivalent to that of titled TPPCOO−.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141585842","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, Solid State Structures, and Properties of Linear and Tripodal Flexible Molecules with Pyrazinopyrazine Moieties 具有吡嗪并吡嗪分子的线性和三足柔性分子的合成、固态结构和性质
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-07-10 DOI: 10.1093/chemle/upae140
Yuto Ohmura, Ryusei Oketani, Akihito Konishi, Makoto Yasuda, Ichiro Hisaki
{"title":"Synthesis, Solid State Structures, and Properties of Linear and Tripodal Flexible Molecules with Pyrazinopyrazine Moieties","authors":"Yuto Ohmura, Ryusei Oketani, Akihito Konishi, Makoto Yasuda, Ichiro Hisaki","doi":"10.1093/chemle/upae140","DOIUrl":"https://doi.org/10.1093/chemle/upae140","url":null,"abstract":"Pyrazino[2,3-b]pyrazine (PP), which is a naphthalene analogue with iminium nitrogen atoms at 1,4,5,8-positions instead of sp2-carbon atoms, is attractive as a building block for nitrogen-highly-contained π-conjugated systems. In this study, we synthesized PP-based linear and tripodal molecules, in which PP moieties are bonded with the central benzene ring at 1,4-positions and 1,3,5-positions, respectively, giving conformationally flexible and moderately π-conjugated molecules. It is noteworthy that the tripodal one forms unique interdigitated dimer with a small cavity in a crystalline state because of flexible tripodal molecular shape.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141585692","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
Molecular engineering of coumarins for enhanced two-photon absorption property 增强双光子吸收特性的香豆素分子工程学
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-07-09 DOI: 10.1093/chemle/upae131
Fan Zhang, Yong-Hsin Wang, Cheng-Lin Wu, Tzu-Chau Lin, Manabu Abe
{"title":"Molecular engineering of coumarins for enhanced two-photon absorption property","authors":"Fan Zhang, Yong-Hsin Wang, Cheng-Lin Wu, Tzu-Chau Lin, Manabu Abe","doi":"10.1093/chemle/upae131","DOIUrl":"https://doi.org/10.1093/chemle/upae131","url":null,"abstract":"A series of coumarin-based quadrupolar and octupolar derivatives containing electron-donating substituents (carbazole or diphenylamine groups) were synthesized. Their photophysical properties were explored in different organic solvents (toluene, dichloromethane, and dimethyl sulfoxide). Each donor group was connected via cyclic stilbene based on coumarin, resulting in compounds with large two-photon absorption cross-sections.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567551","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
Near UV photon upconversion in cast solid with quantum dot 带有量子点的铸型固体中的近紫外光子上转换
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-07-09 DOI: 10.1093/chemle/upae137
Kenta Sawaguchi, Kazuki Inada, Daichi Eguchi, Kenji Kamada, Naoto Tamai
{"title":"Near UV photon upconversion in cast solid with quantum dot","authors":"Kenta Sawaguchi, Kazuki Inada, Daichi Eguchi, Kenji Kamada, Naoto Tamai","doi":"10.1093/chemle/upae137","DOIUrl":"https://doi.org/10.1093/chemle/upae137","url":null,"abstract":"CdS/ZnS core-shell semiconductor quantum dots (QDs) were hybridized with1-naphthalenecarboxylic acid, a triplet transmitter, by a ligand exchange method. UV emission peaked at 340 nm or longer was obtained by visible continuous-wave excitation at 405 nm in n-hexane solution by mixing the hybridized QD with 2,5-diphenyloxazole (PPO) as UV emitter, based on triplet-triplet annihilation upconversion (TTA-UC) mechanism. The same mixture but in tetrahydrofuran gave solid film by solution casting, and the solid showed upconversion emission in near UV spectral region (380-395 nm) by 405-nm excitation.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567550","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
Neural network molecular dynamics simulation on friction-induced chemical reactions of Si3N4 in water and ethylene glycol environments 水和乙二醇环境中 Si3N4 摩擦诱导化学反应的神经网络分子动力学模拟
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-07-06 DOI: 10.1093/chemle/upae114
Ryutaro Kudo, Yusuke Ootani, Shogo Fukushima, Nobuki Ozawa, Momoji Kubo
{"title":"Neural network molecular dynamics simulation on friction-induced chemical reactions of Si3N4 in water and ethylene glycol environments","authors":"Ryutaro Kudo, Yusuke Ootani, Shogo Fukushima, Nobuki Ozawa, Momoji Kubo","doi":"10.1093/chemle/upae114","DOIUrl":"https://doi.org/10.1093/chemle/upae114","url":null,"abstract":"Silicon nitride (Si3N4) exhibits low friction in aqueous environments due to a tribolayer that is formed through tribochemical reactions. However, the low friction state is not maintained in high contact pressure conditions, where surface-surface contact is dominant at the sliding interface, i.e. the load carrying capacity is low. Recently, it was reported that an ethylene glycol (EG) additive improves the load carrying capacity of Si3N4 in aqueous environments, though their mechanism is still in debate. In this study, we performed friction simulations to analyze the tribochemical reactions of water and an EG additive using a neural network molecular dynamics method which enables large-scale simulation with high accuracy comparable with ab initio molecular dynamics calculations. We found that tribochemical reactions of water produce SiO2 particles. On the other hand, tribochemical reactions of EG produce compounds which consist of carbon, nitrogen, and hydrogen atoms on the Si3N4 surface and the Si3N4 surface is covered by the compounds. Based on this finding, we propose that the compounds covering the Si3N4 surface can improve its load carrying capacity.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567592","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
Rapid synthesis of olivine NaMnPO4 快速合成橄榄石 NaMnPO4
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-07-03 DOI: 10.1093/chemle/upae125
Han Xiao, Haisheng Fang
{"title":"Rapid synthesis of olivine NaMnPO4","authors":"Han Xiao, Haisheng Fang","doi":"10.1093/chemle/upae125","DOIUrl":"https://doi.org/10.1093/chemle/upae125","url":null,"abstract":"There are only limited methods available to synthesize metastable olivine NaMnPO4, and these methods all involve a time-consuming process. Herein, we report a rapid synthesis of olivine NaMnPO4, and the results show that the formation of olivine NaMnPO4 highly depends on the Na/Mn/P ratio and the pH of the reaction system, and pure olivine NaMnPO4 can be hydrothermally synthesized for only 1 h under appropriate conditions. This communication provides an efficient process for synthesis of olivine NaMnPO4.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141548445","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
Et3N-catalyzed [3 + 2] annulation reaction of β-oxo-acrylamides with diethyl 2-oxomalonates: facile access to oxazolidin-4-one derivatives Et3N 催化的 β-氧代丙烯酰胺与 2-氧代丙二酸二乙酯的[3 + 2]环化反应：轻松获得噁唑烷-4-酮衍生物
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-07-02 DOI: 10.1093/chemle/upae116
Lingang Wu, Baochuan Guan, Zhaoxue Wang, Lei Xie
{"title":"Et3N-catalyzed [3 + 2] annulation reaction of β-oxo-acrylamides with diethyl 2-oxomalonates: facile access to oxazolidin-4-one derivatives","authors":"Lingang Wu, Baochuan Guan, Zhaoxue Wang, Lei Xie","doi":"10.1093/chemle/upae116","DOIUrl":"https://doi.org/10.1093/chemle/upae116","url":null,"abstract":"A new and effective method for the [3 + 2] annulation of β-oxo-acrylamides with diethyl 2-oxomalonate, catalyzed by NEt3, has been developed to be carried out under mild reaction conditions. This approach offers a direct route to synthesize oxazolidin-4-one derivatives with yields ranging from 58% to 76%. The process is notable for being highly atom-efficient and operationally simple.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141518755","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
Developments in the synthesis of allylsilanes by transition metal–catalyzed silylation of 1,3-dienes with disilanes 通过过渡金属催化 1,3 二烯与二硅烷的硅烷化反应合成烯丙基硅烷的研究进展
IF 1.4 4区 化学
Chemistry Letters Pub Date : 2024-07-01 DOI: 10.1093/chemle/upae134
Nobuki Katayama, Yasushi Obora
{"title":"Developments in the synthesis of allylsilanes by transition metal–catalyzed silylation of 1,3-dienes with disilanes","authors":"Nobuki Katayama, Yasushi Obora","doi":"10.1093/chemle/upae134","DOIUrl":"https://doi.org/10.1093/chemle/upae134","url":null,"abstract":"\u0000 This highlight review overviews developments in the synthesis of allylsilanes by transition metal–catalyzed silylation of 1,3-dienes with disilanes. We specifically review disilylation, which installs 2 silicon atoms, and silyl-functionalization, which installs both silicon and another atom using disilanes and reagents such as nucleophiles and electrophiles. Utilizing these methods for the silylation of 1,3-dienes provides a robust protocol for the efficient synthesis of the desired allylsilanes in 1 step, thereby streamlining the silyl-functionalization of 1,3-dienes.","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":"141697820","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 Activation of a Ru(II) Complex Catalyst via a Carbazole-Modified Donor–Acceptor Ligand for CO2 Reduction 通过咔唑修饰的供体-受体配体以可见光活化 Ru(II) 复合物催化剂，用于二氧化碳还原
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-07-01 DOI: 10.1093/chemle/upae127
Akinobu Nakada, Yuya Tomiura, Hajime Suzuki, Osamu Tomita, Ryu Abe
{"title":"Visible-Light Activation of a Ru(II) Complex Catalyst via a Carbazole-Modified Donor–Acceptor Ligand for CO2 Reduction","authors":"Akinobu Nakada, Yuya Tomiura, Hajime Suzuki, Osamu Tomita, Ryu Abe","doi":"10.1093/chemle/upae127","DOIUrl":"https://doi.org/10.1093/chemle/upae127","url":null,"abstract":"Visible-light activation of photocatalysts is crucial for effectively utilizing solar energy in molecular conversions. This study demonstrates that modifying the bipyridine ligand with carbazole enables visible-light activation of a Ru(II) carbonyl complex catalyst, which is originally developed as an electrocatalyst for CO2 reduction but inactive as a photocatalyst on its own. The present study opens avenues for individually designing light-absorbing ligands and catalytic functions within one mononuclear complex.","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":"141531212","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
Flexible Porous Coordination Polymer with Multiple Configurations for Guest Recognition and Switchable CO2 Sorption Properties 具有多种构型的柔性多孔配位聚合物，可识别访客并具有可切换的二氧化碳吸附特性
IF 1.6 4区 化学
Chemistry Letters Pub Date : 2024-07-01 DOI: 10.1093/chemle/upae128
Ping Wang, Ken-ichi Otake, Shotaro Hiraide, Yoshiki Kubota, Shogo Kawaguchi, Susumu Kitagawa
{"title":"Flexible Porous Coordination Polymer with Multiple Configurations for Guest Recognition and Switchable CO2 Sorption Properties","authors":"Ping Wang, Ken-ichi Otake, Shotaro Hiraide, Yoshiki Kubota, Shogo Kawaguchi, Susumu Kitagawa","doi":"10.1093/chemle/upae128","DOIUrl":"https://doi.org/10.1093/chemle/upae128","url":null,"abstract":"Realizing multiple metastable configurations in a single porous coordination polymer (PCP) has long been pursued to achieve switchable functionality. In this study, we reported multiple configurations in one PCP material via the design of the adjustable intraframework π-π stacking moieties. We demonstrated that the PCP can accommodate three different open pore phases depending on the type of solvent. Furthermore, this PCP exhibits three distinct closed pore phases depending on the activation approaches, demonstrating different CO2 sorption properties.","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":"141518756","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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