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Selective cross-hydrodimerization of alkenes 烯烃的选择性交叉二聚化
0 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-09-09 DOI: 10.1038/s44160-024-00635-0
Sudip Maiti, Debabrata Maiti
Enantioenriched alkyl–alkyl bonds are produced from abundant alkenes in one step via Ni-catalysed asymmetric cross-hydrodimerization. This technique overcomes the reactivity and selectivity challenges associated with coupling between two similar nucleophiles.
通过镍催化的不对称交叉二聚氢反应,一步即可从丰富的烯烃中生成对映体烷基-烷基键。该技术克服了两个类似亲核物之间耦合所带来的反应性和选择性难题。
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引用次数: 0
Forging out-of-equilibrium supramolecular gels 锻造失衡超分子凝胶
0 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-09-06 DOI: 10.1038/s44160-024-00623-4
Simona Bianco, Fin Hallam Stewart, Santanu Panja, Asra Zyar, Emma Bowley, Marko Bek, Roland Kádár, Ann Terry, Roberto Appio, Tomás S. Plivelic, Mahon Maguire, Harish Poptani, Marco Marcello, Ravi R. Sonani, Edward H. Egelman, Dave J. Adams
The design of supramolecular hydrogels comprising aligned domains is important for the fabrication of biomimetic materials and applications in optoelectronics. One way to access such materials is by the self-assembly of small molecules into long fibres, which can be aligned using an external stimulus. Out-of-equilibrium supramolecular gels can also be designed, where pre-programmed changes of state can be induced by the addition of chemical fuels. Here we exploit these dynamic properties to form materials with aligned domains through a ‘forging’ approach: an external force is used to rearrange the underlying network from random to aligned fibres as the system undergoes a pre-programmed gel-to-sol-to-gel transition. We show that we can predictably organize the supramolecular fibres, leading to controllable formation of materials with aligned domains through a high degree of temporal control. Dynamic supramolecular systems can be designed to adapt phases in a pre-programmable way. Here the transient nature of a gel system is exploited, in combination with the application of mechanical stimuli, to obtain soft materials with aligned fibres in a controllable way.
设计包含对齐结构域的超分子水凝胶对于制造仿生物材料和光电子学应用非常重要。获得此类材料的一种方法是将小分子自组装成长纤维,在外部刺激下对齐。此外,还可以设计失衡超分子凝胶,通过添加化学燃料诱导预先设定的状态变化。在这里,我们利用这些动态特性,通过 "锻造 "方法形成具有对齐结构域的材料:当系统经历预设的凝胶到溶胶再到凝胶的转变时,利用外力将底层网络从随机纤维重新排列为对齐纤维。我们的研究表明,我们可以预测超分子纤维的组织情况,从而通过高度的时间控制,可控地形成具有对齐结构域的材料。
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引用次数: 0
Synthesis pathways to thin films of stable layered nitrides 稳定层状氮化物薄膜的合成途径
0 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-09-06 DOI: 10.1038/s44160-024-00643-0
Andriy Zakutayev, Matthew Jankousky, Laszlo Wolf, Yi Feng, Christopher L. Rom, Sage R. Bauers, Olaf Borkiewicz, David A. LaVan, Rebecca W. Smaha, Vladan Stevanovic
Controlled synthesis of metastable materials away from equilibrium is of interest in materials chemistry. Thin-film deposition methods with rapid condensation of vapour precursors can readily synthesize metastable phases but often struggle to yield the thermodynamic ground state. Growing thermodynamically stable structures using kinetically limited synthesis methods is important for practical applications in electronics and energy conversion. Here we reveal a synthesis pathway to thermodynamically stable, ordered layered ternary nitride materials, and discuss why disordered metastable intermediate phases tend to form. We show that starting from elemental vapour precursors leads to a 3D long-range-disordered MgMoN2 thin-film metastable intermediate structure, with a layered short-range order that has a low-energy transformation barrier to the layered 2D-like stable structure. This synthesis approach is extended to ScTaN2, MgWN2 and MgTa2N3, and may lead to the synthesis of other layered nitride thin films with unique semiconducting and quantum properties. Synthesis of metastable materials away from thermodynamic equilibrium has been a challenge in materials chemistry, but thin-film methods often struggle to yield ground-state structures. Now, a synthesis pathway to thin films of stable layered ternary nitrides is revealed, and the tendency for metastable intermediate formation is discussed.
材料化学领域对远离平衡态的可控合成态材料很感兴趣。利用蒸汽前驱体快速凝结的薄膜沉积方法可以很容易地合成出逸散相,但往往难以得到热力学基态。利用动力学限制合成方法生长热力学稳定结构对于电子和能量转换领域的实际应用非常重要。在这里,我们揭示了一条通向热力学稳定、有序的层状三元氮化物材料的合成途径,并讨论了为什么无序的可骤变中间相往往会形成。我们的研究表明,从元素蒸汽前驱体开始,可形成三维长程无序的 MgMoN2 薄膜可转移中间结构,其分层短程有序具有低能转化障碍,可转化为类似二维稳定结构的分层结构。这种合成方法可扩展到 ScTaN2、MgWN2 和 MgTa2N3,并可能导致合成具有独特半导体和量子特性的其他层状氮化物薄膜。
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引用次数: 0
Stereospecific C–O sulfation via persulfate-induced 1,4-metallate migration 通过过硫酸盐诱导的 1,4-金属铝迁移进行立体特异性 C-O 硫化反应
0 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-09-05 DOI: 10.1038/s44160-024-00636-z
Zetao Zhao, Qian Yu, Zhen Xia, Zhongyao Ye, Xuejin Huang, Chunlan Song, Jiakun Li
Sulfation, a ubiquitous post-translational modification in biomolecules, primarily targets substrates containing OH groups through O-sulfonation (O–SO3). A method for sulfation via the formation of C–O bonds has the potential to access organic sulfates from a broad substrate scope and in a stereoselective manner but remains elusive. Stereospecific C–O bond formation via 1,2-metallate migration in peroxide oxidation has not been deployed to create any other valuable C–O bonds apart from C–OH. Here we describe a fundamentally unique reactivity of persulfate salts for stereospecific C–O sulfation via 1,4-metallate migration. With the aid of readily accessible, stereodefined organic boron compounds derived from native functionalities and a tandem borylation–sulfation approach, our study thus expands to include hydrosulfation of alkenes, C–H sulfation, decarboxylative sulfation, dehalogenative sulfation and deaminative sulfation, which are not otherwise readily accessible. O-sulfonation is a common method for producing organosulfates but is limited to hydroxyl compounds. Here the unique reactivity of persulfates enables stereospecific C–O sulfation via 1,4-metallate migration. This approach provides an unprecedented platform to readily access structurally diverse organosulfates from a wide substrate scope.
硫酸化是生物大分子中一种无处不在的翻译后修饰,主要通过 O-磺化(O-SO3)作用于含有 OH 基团的底物。通过形成 C-O 键进行硫酸化的方法有可能以立体选择性的方式从广泛的底物范围中获得有机硫酸盐,但这种方法仍然难以实现。在过氧化物氧化过程中,通过 1,2-Metallate 迁移形成立体特异性 C-O 键的方法,除了 C-OH 之外,还没有用于生成其他有价值的 C-O 键。在这里,我们描述了过硫酸盐通过 1,4-Metallate 迁移进行立体特异性 C-O 硫化的独特反应性。借助从原生官能团中提取的易于获得、立体定义的有机硼化合物以及串联的硼酸化-硫酸化方法,我们的研究由此扩展到包括烯烃的氢化硫酸化、C-H 硫酸化、脱羧硫酸化、脱卤硫酸化和脱氨基硫酸化,而这些反应在其他方面是不容易获得的。
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引用次数: 0
Mechanically rigid metallopeptide nanostructures achieved by highly efficient folding 通过高效折叠实现机械刚性金属肽纳米结构
0 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-09-05 DOI: 10.1038/s44160-024-00640-3
Xing Kang, Li Wang, Bingyu Liu, Shuyi Zhou, Yingguo Li, Shuai-Liang Yang, Rui Yao, Liang Qiao, Xiao Wang, Wei Gong, Yan Liu, Leilei Shi, Jinqiao Dong, Yong Cui, Anthony P. Davis
Natural proteins must fold into complex three-dimensional structures to achieve excellent mechanical properties vital for biological functions, but this has proven to be exceptionally difficult to control in synthetic systems. As such, the long-standing issue of low mechanical rigidity and stability induced by misfolding constrains the physical and chemical properties of self-assembling peptide materials. Here we introduce a mixed-chirality strategy that enhances folding efficiency in topologically interlocked metallopeptide nanostructures. The orderly entanglement of heterochiral peptide-derived linkers can fold into a compact three-dimensional catenane. These folding-mediated secondary structural changes not only generate biomimetic binding pockets derived from individual peptide strands but also result in strong chiral amplification by the tight interlocking manner. Notably, this strategic ‘chirality mutation’ alters their arrangement into tertiary structures and is pivotal in achieving exceptional mechanical rigidity observed in the metallopeptide crystals, which exhibit a Young’s modulus of 157.6 GPa, approximately tenfold higher than the most rigid proteinaceous materials in nature. This unusual nature is reflected in enhanced peptide-binding properties and heightened antimicrobial activities relative to its unfolded counterpart. A strategy is introduced for promoting the folding in metallopeptide nanostructures, resulting in high mechanical rigidity. The mechanical properties are reflected in enhanced peptide-binding properties and heightened antimicrobial activities relative to their unfolded counterparts.
天然蛋白质必须折叠成复杂的三维结构,才能获得对生物功能至关重要的优异机械特性,但事实证明,这在合成系统中异常难以控制。因此,由折叠错误引起的低机械刚性和稳定性这一长期存在的问题制约了自组装多肽材料的物理和化学特性。在这里,我们介绍了一种混合手性策略,可提高拓扑互锁金属肽纳米结构的折叠效率。异手性肽衍生连接体的有序缠结可折叠成紧凑的三维卡榫。这些由折叠介导的二级结构变化不仅产生了源自单个肽链的仿生物结合口袋,还通过紧密交锁的方式产生了强大的手性放大作用。值得注意的是,这种战略性的 "手性突变 "改变了它们在三级结构中的排列,是金属肽晶体实现超凡机械刚性的关键,其杨氏模量高达 157.6 GPa,比自然界中最坚硬的蛋白质材料高出约十倍。与未折叠的对应物相比,金属肽晶体具有更强的肽结合特性和更高的抗菌活性,这反映了金属肽晶体与众不同的性质。
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引用次数: 0
Light-enabled scalable synthesis of bicyclo[1.1.1]pentane halides and their functionalizations 双环[1.1.1]戊烷卤化物及其功能化的光致可扩展合成
0 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-09-05 DOI: 10.1038/s44160-024-00637-y
Vasyl Ripenko, Vadym Sham, Vitalina Levchenko, Serhii Holovchuk, Daniil Vysochyn, Ivan Klymov, Dmytro Kyslyi, Stanislav Veselovych, Serhii Zhersh, Yurii Dmytriv, Andrey Tolmachev, Iryna Sadkova, Irina Pishel, Kateryna Horbatok, Viktoria Kosach, Yelyzaveta Nikandrova, Pavel K. Mykhailiuk
In 2012, bicyclo[1.1.1]pentanes were demonstrated to be bioisosteres of the benzene ring. Here, we report a general scalable reaction between alkyl iodides and propellane that provides bicyclo[1.1.1]pentane iodides in milligram, gram and even kilogram quantities. The reaction is performed in flow and requires just light; no catalysts, initiators or additives are needed. The reaction is clean enough that, in many cases, evaporation of the reaction mixture provides products in around 90% purity that can be directly used in further transformations without any purification. Combined with the subsequent functionalization, >300 bicyclo[1.1.1]pentanes for medicinal chemistry have been prepared. So far, this is the most general and scalable approach towards functionalized bicyclo[1.1.1]pentanes. A general and scalable approach to prepare functionalized bicyclo[1.1.1]pentanes is reported. The key reaction between alkyl iodides and propellane is performed in flow and requires just light; no catalysts, initiators or additives are needed. Combined with the subsequent functionalization, >300 bicyclo[1.1.1]pentanes for medicinal chemistry have been prepared.
2012 年,双环[1.1.1]戊烷被证明是苯环的生物异构体。在此,我们报告了烷基碘化物与丙烷之间的一种通用可扩展反应,该反应可提供毫克、克甚至公斤量的双环[1.1.1]戊烷碘化物。反应在流动中进行,只需要光,不需要催化剂、引发剂或添加剂。反应非常干净,在许多情况下,蒸发反应混合物可得到纯度约为 90% 的产品,无需任何纯化即可直接用于进一步的转化。结合后续的官能化反应,已经制备出 300 种用于药物化学的双环[1.1.1]戊烷。到目前为止,这是实现双环[1.1.1]戊烷功能化的最通用、最可扩展的方法。
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引用次数: 0
A hetero-supermolecular-building-block strategy for the assembly of porous (3,12,24)-connected uru metal–organic frameworks 组装多孔 (3,12,24) 连接乌鲁金属有机框架的异种超分子构建块策略
0 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-09-05 DOI: 10.1038/s44160-024-00622-5
Le Shi, Yuanlong Zhong, Honghao Cao, Hao Wang, Zhangyi Xiong, Kun Wang, Hanyang Shen, Zhijie Chen
Supermolecular building block (SBB) approaches have been widely used for synthesizing highly connected metal–organic frameworks (MOFs). However, it remains a challenge to synthesize trinodal MOFs via SBB approaches. Here we report the assembly of (3,12,24)-connected uru-MOFs via a hetero-supermolecular-building-block (hetero-SBB) strategy, that is, using different types of highly connected metal–organic polyhedra (MOPs) as building units. This hetero-SBB strategy allows the facile synthesis of previously inaccessible uru-MOFs via 12-connected cuboctahedral and 24-connected rhombicuboctahedral MOPs. The uru-MOF-1, consisting of hierarchical microporous and mesoporous cages, exhibits a Brunauer–Emmett–Teller area of 3,170 m2 g−1. This MOF shows a high methane uptake of 339.6 cm3 (standard temperature and pressure) cm−3 at 159 K and 10 bar and is a promising candidate for low-temperature methane storage. The hetero-SBB strategy paves a way for the designed synthesis of highly connected MOFs, which are difficult to synthesize via traditional strategies, by taking advantage of the arsenal of synthetic MOPs. The synthesis of isoreticular (3,12,24)-connected uru metal–organic frameworks (MOFs) is reported by the assembly of 12-connected cuboctahedral and 24-connected rhombicuboctahedral supermolecular building blocks. The resulting uru-MOF-1 is a promising candidate for low-temperature methane storage.
超分子构筑块(SBB)方法已被广泛用于合成高度连接的金属有机框架(MOFs)。然而,通过 SBB 方法合成三足鼎立的 MOFs 仍然是一项挑战。在此,我们报告了通过异种超分子构筑块(hetero-SBB)策略,即使用不同类型的高度连接金属有机多面体(MOPs)作为构筑单元,组装出(3,12,24)连接的uru-MOFs。采用这种异质-SBB 策略,可以通过 12 个连接的立方八面体和 24 个连接的菱形立方八面体 MOPs 轻松合成以前无法获得的 uru-MOF。由分层微孔和介孔笼组成的 uru-MOF-1 显示出 3170 平方米 g-1 的布鲁瑙尔-艾美特-泰勒面积。在 159 K 和 10 bar 条件下,这种 MOF 的甲烷吸收量高达 339.6 cm3(标准温度和压力)cm-3,是一种很有前途的低温甲烷存储候选材料。异质-SBB 策略利用合成澳门威尼斯人官网具的优势,为通过传统策略难以合成的高连接性 MOF 的设计合成铺平了道路。
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引用次数: 0
Up–down approach for expanding the chemical space of metal–organic frameworks 拓展金属有机框架化学空间的 "上-下 "方法
0 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-09-05 DOI: 10.1038/s44160-024-00638-x
Jiyeon Kim, Dongsik Nam, Hye Jin Cho, Eunchan Cho, Dharmalingam Sivanesan, Changhyeon Cho, Jaewoong Lee, Jihan Kim, Wonyoung Choe
The vast structural diversity of metal–organic frameworks (MOFs) and the ability to tailor the structures makes the materials applicable for a broad range of uses. Traditional bottom-up and top-down design approaches have enabled a rapid increase in this structural diversity, yet the systematic screening for unknown synthesizable MOFs remains a challenge. Here we report a design strategy, the up–down approach, by merging the bottom-up and top-down approaches. This approach bridges the advantages of both methods, creating a synergistic strategy for discovering MOF structures. Targeting Zr-based MOFs, we search promising topology candidates and unveiled 26 future structural configurations by considering the possible orientations of Zr6 clusters. Through ribbon representation and sophisticated analysis of the ligand angles, we suggest structure models and synthesize Zr6-based MOFs with bct (1) and scu (1) configurations. The up–down approach will accelerate the discovery of previously unknown or inaccessible MOFs, providing exciting opportunities to expand the chemical space of MOFs. An up–down approach for discovering metal–organic frameworks (MOFs) identifies 26 unknown Zr-based MOF configurations and provides a valuable guide for synthetic chemists to expand the chemical space of MOFs.
金属有机框架(MOFs)结构的多样性和对结构进行定制的能力使这种材料具有广泛的用途。传统的 "自下而上 "和 "自上而下 "的设计方法使这种结构多样性迅速增加,然而系统地筛选未知的可合成 MOFs 仍然是一项挑战。在此,我们报告了一种融合自下而上和自上而下方法的设计策略--自上而下方法。这种方法兼具两种方法的优点,是发现 MOF 结构的协同策略。我们以 Zr 基 MOF 为目标,通过考虑 Zr6 簇可能的取向,搜索了有前景的拓扑候选结构,并揭示了 26 种未来的结构构型。通过带状表示和配体角度的精密分析,我们提出了结构模型,并合成了具有 bct (1) 和 scu (1) 构型的 Zr6 基 MOF。这种 "上-下 "方法将加速发现以前未知或无法获得的 MOF,为拓展 MOF 的化学空间提供令人兴奋的机会。
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引用次数: 0
Retraction Note: Synthesis of γ-graphyne using dynamic covalent chemistry 撤稿说明:利用动态共价化学合成γ-石墨烯
0 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-09-02 DOI: 10.1038/s44160-024-00627-0
Yiming Hu, Chenyu Wu, Qingyan Pan, Yinghua Jin, Rui Lyu, Vikina Martinez, Shaofeng Huang, Jingyi Wu, Lacey J. Wayment, Noel A. Clark, Markus B. Raschke, Yingjie Zhao, Wei Zhang
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引用次数: 0
On the characterization of γ-graphyne 论γ-石墨烯的特性
0 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-09-02 DOI: 10.1038/s44160-024-00642-1
William B. Martin, Robert E. Warburton, Shane M. Parker, Valentin O. Rodionov
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引用次数: 0
期刊
Nature synthesis
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