Dalton Transactions最新文献_第10页

Structural and Mechanistic Insights into Oxidative Biaryl Coupling to form Arylomycin Core by an Engineered CYP450 通过工程化 CYP450 氧化双酰偶联形成芳基霉素核心的结构和机理透视

IF 4 3区化学

Dalton Transactions Pub Date : 2024-11-06 DOI: 10.1039/d4dt02197e

Vandana Kardam, Vaibhav Bhatt, Kshatresh Dubey

引用次数: 0

An octanuclear 3-phenyl-5-(2-pyridyl)pyrazolate/phenylsilsesquioxane complex: synthesis, unique structure, and catalytic activity 八核 3-苯基-5-(2-吡啶基)吡唑醇/苯基硅倍半氧杂环：合成、独特结构和催化活性

IF 4 3区化学

Dalton Transactions Pub Date : 2024-11-06 DOI: 10.1039/d4dt02690j

Alexey Bilyachenko, Victor N Khrustalev, Zhibin Huang, Lidia S. Shul'pina, Pavel Dorovatovskii, Elena Shubina, Nikolay S. Ikonnikov, Nikolai N. Lobanov, Karim G. Rahimov, Di Sun

引用次数: 0

Two amino-functionalized metal–organic frameworks with different topologies for C2H2/C2H4 separation† 两种拓扑结构不同的氨基功能化金属有机框架用于分离 C2H2/C2H4

IF 3.5 3区化学

Dalton Transactions Pub Date : 2024-11-06 DOI: 10.1039/D4DT02592J

Yue Li, Mingming Xu, Hongyan Liu, Xiaokang Wang, Yutong Wang, Meng Sun, Weidong Fan and Daofeng Sun

引用次数: 0

Reactions of a Geminal Sc/P Lewis Pair with Pyridotetrazole and Beyond 双子座 Sc/P 刘易斯对与吡啶四氮唑及其他的反应

IF 4 3区化学

Dalton Transactions Pub Date : 2024-11-06 DOI: 10.1039/d4dt02838d

Yiwen Guan, Xian Xu, Xin Xu

引用次数: 0

Influence of triphosphine ligand coordination geometry in Mn(I) hydride complexes [(P∩P∩P)(CO)2MnH] on their kinetic hydricity 氢化物锰（I）配合物[(P∩P∩P)(CO)2MnH]中三膦配体的配位几何对其动力学水合性的影响

IF 4 3区化学

Dalton Transactions Pub Date : 2024-11-06 DOI: 10.1039/d4dt02496f

Sergey A. Kovalenko, Ekaterina S. Gulyaeva, Elena S. Osipova, Oleg A. Filippov, Anastasia Danshina, Laure Vendier, Nikolay V. Kireev, Ivan A. Godovikov, Yves CANAC, Dmitry A. Valyaev, Natalia Belkova, Elena Shubina

{"title":"Influence of triphosphine ligand coordination geometry in Mn(I) hydride complexes [(P∩P∩P)(CO)2MnH] on their kinetic hydricity","authors":"Sergey A. Kovalenko, Ekaterina S. Gulyaeva, Elena S. Osipova, Oleg A. Filippov, Anastasia Danshina, Laure Vendier, Nikolay V. Kireev, Ivan A. Godovikov, Yves CANAC, Dmitry A. Valyaev, Natalia Belkova, Elena Shubina","doi":"10.1039/d4dt02496f","DOIUrl":"https://doi.org/10.1039/d4dt02496f","url":null,"abstract":"Octahedral Mn(I) complexes bearing tridentate donor ligands [(L∩L’∩L’’)(CO)2MnX] have recently emerged as major players in catalytic (de)hydrogenation processes. While most of these systems are still based on structurally rigid pincer scaffolds imposing a meridional coordination mode, for some more flexible tridentate ligands a facial arrangement of donor moieties becomes possible. Accordingly, the geometry of the corresponding Mn(I) hydrides [(L∩L’∩L’’)(CO)2MnH] directly involved in the catalytic processes, namely the nature of the donor extremity located in the trans-position of the hydride (CO and L for mer- and fac-configuration, respectively) may influence their hydride transfer ability. Herein, low-temperature IR and NMR spectroscopy studies of two model Mn(I) complexes mer-[(L1)(CO)2MnH] and fac-[(L2)(CO)2MnH] bearing similar triphosphine ligands (L1 = PhP(CH2CH2PPh2)2; L2 = MeC(CH2PPh2)3) in the presence of B(C6F5)3 as H− abstractor revealed for the first time a higher kinetic hydricity of the tripodal system. Even for the pincer complex, hydride transfer proceeds from the non-covalent adduct fac-[(L1)(CO)2MnH]∙∙∙B(C6F5)3 with facial geometry arising from the mer-to-fac isomerization of the initial mer-[(L1)(CO)2MnH]. The higher reactivity of the fac-hydride derivatives was found to be consistent with catalytic performance of the corresponding Mn(I) bromide complexes in the benchmark ester hydrosilylation.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"87 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Switchable, chiral aluminium catalysts for ring opening polymerisations† 用于开环聚合反应的可切换手性铝催化剂

IF 3.5 3区化学

Dalton Transactions Pub Date : 2024-11-06 DOI: 10.1039/D4DT02831G

David T. Jenkins, Elizabeth C. Trodden, John M. Andresen, Stephen M. Mansell and Ruaraidh D. McIntosh

引用次数: 0

A new type of Lanthanide−sodium metalloring organic framework featuring high proton conduction in a wide temperature range and detection of Fe3+ ions 一种新型镧系钠金属有机框架，具有在宽温度范围内高质子传导性和检测 Fe3+ 离子的特点

IF 4 3区化学

Dalton Transactions Pub Date : 2024-11-05 DOI: 10.1039/d4dt02479f

Lizhen Liu, Gaoyong Zhu, Kang Yang, Yaozong Chen, Yuan Hong, Yiyang Bo, Susu Wu, Xiangfang Peng, Zizhu Yao

{"title":"A new type of Lanthanide−sodium metalloring organic framework featuring high proton conduction in a wide temperature range and detection of Fe3+ ions","authors":"Lizhen Liu, Gaoyong Zhu, Kang Yang, Yaozong Chen, Yuan Hong, Yiyang Bo, Susu Wu, Xiangfang Peng, Zizhu Yao","doi":"10.1039/d4dt02479f","DOIUrl":"https://doi.org/10.1039/d4dt02479f","url":null,"abstract":"We present the design and synthesis of two novel isostructural metalloring organic frameworks (MROFs) {[(Me2NH2)1.25(H3O)4.25Na1.5X2(μ2-OH)(H2O)(SIP)4]n • x sol (FUT-2-X, X = Eu, Sm), which are composed of sulfonate-carboxylate ligand 5-sulfoisophthalic acid monosodium salt (NaH2SIP) and unprecedented Lanthanide - sodium metalloring [X4Na4(H2O)(SIP)2, X = Eu, Sm]. The two MROFs possess channel walls decorated with uncoordinated sulfonic acid groups and filled with abundant guest molecules residing within the framework, which support the proton conductivity of the materials by expanding the intermolecular hydrogen bonding network. FUT-2-Eu exhibits exceptional proton conductivity over a wide temperature range, achieving conductivity from 1.91×10-5 S cm-1 (-40 oC) to 2.65 × 10-3 S cm-1 (90 oC). Thanks to the dominant role of the additional guest H2O molecules in FUT-2-Eu's channels, which facilitate the formation of hydrogen-bonded networks for ultra-fast proton transfer with low energy barriers, FUT-2-Eu outperforms FUT-2-Sm in both operating temperature range and proton conductivity. It is worth noting that FUT-2-Eu has the widest operating temperature range among proton conduction materials of MROFs. Furthermore, FUT-2-Eu can be considered as an excellent luminescence sensor with high sensitivity (Ksv = 1.66 × 104 L·mol-1) and low detection limit (3.64 μM) for detecting Fe3+.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"9 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Influence of weakly coordinating anions binding to the hexa-tert-butyl dysprosocenium cation 弱配位阴离子与六叔丁基镝阳离子结合的影响

IF 4 3区化学

Dalton Transactions Pub Date : 2024-11-05 DOI: 10.1039/d4dt02713b

Sophie C. Corner, Gemma Kate Gransbury, David P Mills

{"title":"Influence of weakly coordinating anions binding to the hexa-tert-butyl dysprosocenium cation","authors":"Sophie C. Corner, Gemma Kate Gransbury, David P Mills","doi":"10.1039/d4dt02713b","DOIUrl":"https://doi.org/10.1039/d4dt02713b","url":null,"abstract":"Complexes containing isolated dysprosocenium cations, [Dy(CpR)2][WCA] (CpR = substituted cyclopentadienyl, WCA = weakly coordinating anion), have recently emerged as leading examples of high-temperature single-molecule magnets (SMMs) due to a combination of the axial orientation and rigidity of the CpR rings. However, our understanding of the effects of transverse fields on the magnetic properties of [Dy(CpR)2]+ cations is underdeveloped. Here we investigate the impact of equatorially-bound WCAs via the synthesis of the Dy(III) bis-CpR complexes [Dy(Cpttt)2{AlCl[OC(CF3)3]3-κ-Cl}] (1) and [Dy(Cpttt)2{AlCl(C2H5)[OC(C6F5)3]2-κ-Cl}] (2), and their characterisation by single crystal XRD, elemental analysis, ATR-IR and NMR spectroscopy, and ab initio calculations. Despite the similarity of the Dy coordination spheres in 1 and 2 we find that their effective energy barriers to reversal of magnetisation are vastly different (Ueff = 886(17) cm–1 and 559(18) cm–1, respectively) and they both show waist-restricted magnetic hysteresis at 2 K. Together, these data provide fresh insights into the sensitivity of the magnetic properties of [Dy(CpR)2]+ cations to relatively weak equatorial interactions.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"146 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Doping induced band-gap shrinkage to modify electronic structure of MoS2 for organic wastewater management 掺杂诱导带隙收缩，改变用于有机废水处理的 MoS2 电子结构

IF 4 3区化学

Dalton Transactions Pub Date : 2024-11-05 DOI: 10.1039/d4dt00523f

Yuchen Zhang, Yuehan Jia, Yanjie Li, Hongquan Xu, Jingsu Wang, Maobin Wei, Yong Zhang, Hui Yuan, Ming Gao

{"title":"Doping induced band-gap shrinkage to modify electronic structure of MoS2 for organic wastewater management","authors":"Yuchen Zhang, Yuehan Jia, Yanjie Li, Hongquan Xu, Jingsu Wang, Maobin Wei, Yong Zhang, Hui Yuan, Ming Gao","doi":"10.1039/d4dt00523f","DOIUrl":"https://doi.org/10.1039/d4dt00523f","url":null,"abstract":"MoS2, with its high specific surface area and tunable electronic structure, has received much interest in the fields of sensing and environmental remediation. Nevertheless, pure MoS2 has the disadvantages of easy aggregation and the high electron-hole pairs complexity, which affects its SERS and photocatalytic performance. In this work, band-gap shrinkage strategy was used to improve MoS2 performance for SERS and photocatalytic applications. It exhibited high SERS activity (enhancement factor (EF) = 3.61 × 108), great stability (4 mth), broad universality (CV, CR and R6G), and excellent reusability (recover 95% after 5 cycles). In addition, the interfacial dipole-dipole interaction and charge transfer (CT) process caused by doping Ru together enhance the SERS sensitivity, and the limit of detection of CV is down to 10-11 M. The degradation rate of 10-5 M CV was up to 99% after 60 min of Ru-MoS2 photocatalytic degradation under visible light. This study investigated the effect of doping-induced bandgap shrinkage on charge transfer (CT), providing new insights into improving the sensitivity of semiconductors SERS substrates for efficient low-concentration SERS detection and low-cost sustainable wastewater remediation.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"17 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Noble Metal-Free Porphyrin Covalent Organic Framework Membrane for CO2 Photoreduction to CO 用于将 CO2 光还原为 CO 的无贵金属卟啉共价有机框架膜

IF 4 3区化学

Dalton Transactions Pub Date : 2024-11-05 DOI: 10.1039/d4dt02658f

Yuxia Hou, Haizeng Ma, Dan Zhu, Renlong Li, ZIyan Zhao, Chun-Xiang Li, Cheng-Xing Cui, Ji-Chao Wang

引用次数: 0