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Cold-resilient zinc batteries with organic-free solvation structures 无有机溶剂化结构的耐冷锌电池
IF 19.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-02-13 DOI: 10.1016/j.chempr.2024.102403
Daliang Han , Feifei Wang , Quan-Hong Yang
Invitation of organic cosolvents into aqueous electrolytes has been widely proven effective in stabilizing zinc (Zn) anodes but easily brings about sluggish desolvation kinetics concurrently. In this issue of Chem, Geng and coworkers report an organic/aqueous hybrid electrolyte with an organic-solvent-free primary solvation sheath, achieving facile desolvation and durable Zn batteries under subzero conditions.
有机共溶剂的加入对锌阳极的稳定是有效的,但同时也容易导致脱溶动力学缓慢。在这一期的《化学》杂志上,耿和他的同事报道了一种有机/水混合电解质,它具有无有机溶剂的初级溶剂化鞘,可以在零度以下的条件下实现容易的溶解和耐用的锌电池。
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引用次数: 0
From low-res measurements to high-res insights: Revolutionizing COF structural determination
IF 19.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-02-13 DOI: 10.1016/j.chempr.2025.102452
Elad Harel
In their recent work published in the Journal of the American Chemical Society, Zhang et al. introduce a novel approach combining electron diffraction data with computational optimization to derive high-resolution atomic structures of covalent organic frameworks (COFs). This breakthrough demonstrates the transformative potential of integrating computational and statistical tools with experimental datasets, paving the way for innovative COF design and discovery.
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引用次数: 0
One-pot catalytic conversion of polyethylene wastes to gasoline through a dual-catalyst system 通过双催化剂系统将聚乙烯废料一锅催化转化为汽油
IF 19.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-02-13 DOI: 10.1016/j.chempr.2024.10.007
Wanying Han , Longfei Lin , Ziyu Cen , Yubin Ke , Qian Xu , Junfa Zhu , Xuelei Mei , Zhanghui Xia , Xinrui Zheng , Yaqin Wang , Yani Liu , Mingyuan He , Haihong Wu , Buxing Han
Chemical upcycling of polyethylene (PE) waste presents a viable and promising approach to address the issues of plastic waste accumulation. However, developing cost-effective and efficient routes for converting PE waste into value-added products remains a challenging task. Here, we report a one-pot, dual-catalyst system for efficient conversion of PE into gasoline without the need for noble-metal catalysts, external hydrogen, or solvents. A gasoline yield of up to 87% is achieved over a dual-catalyst system comprising WZr-KIT-6 and HZSM-5 at 240°C. The WZr-KIT-6 catalyst facilitated the activation and pre-cracking of PE chains into unsaturated oligomers over Si-O-Zr and W-O(H)-Zr sites. These unsaturated oligomers, characterized by increased mobility and reactivity, were subsequently converted into C4–C12 gasoline-range compounds through β-scission, isomerization, and hydride transfer over HZSM-5. The synergistic reaction mechanism over mesoporous and microporous materials was crucial for enhancing the efficiency and selectivity of PE conversion.
聚乙烯(PE)废料的化学升级再循环是解决塑料废料堆积问题的一种可行且前景广阔的方法。然而,开发具有成本效益且高效的途径将聚乙烯废料转化为增值产品仍是一项具有挑战性的任务。在此,我们报告了一种无需贵金属催化剂、外部氢气或溶剂即可将聚乙烯高效转化为汽油的单锅双催化剂系统。由 WZr-KIT-6 和 HZSM-5 组成的双催化剂系统可在 240°C 的温度下实现高达 87% 的汽油收率。WZr-KIT-6 催化剂可促进聚乙烯链在 Si-O-Zr 和 W-O(H)-Zr 位点上活化并预裂解为不饱和低聚物。这些不饱和低聚物具有更高的流动性和反应活性,随后在 HZSM-5 上通过 β 裂解、异构化和氢化物转移转化为 C4-C12 汽油范围的化合物。介孔和微孔材料上的协同反应机制对于提高聚乙烯转化的效率和选择性至关重要。
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引用次数: 0
The sustainability potential of single-atom catalysts in chemical process
IF 19.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-02-13 DOI: 10.1016/j.chempr.2025.102412
Zirui Gao , Shixiang Yu , Zeyan Cen , Ding Ma
In a recent Cell Reports Sustainability article, Bajada et al. compare the different catalytic systems in fine chemical manufacturing based on cost and greenhouse gas emissions.1 They conclude that the adoption of heterogeneous single-atom catalysts (SACs)2 over traditional homogeneous systems is critical for the development of sustainable catalysis.
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引用次数: 0
Globally aromatic odd-electron π-magnetic macrocycle 全芳香奇电子π-磁性大环
IF 19.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-02-13 DOI: 10.1016/j.chempr.2024.09.015
Federico Villalobos , Jan Berger , Adam Matěj , Reed Nieman , Ana Sánchez-Grande , Diego Soler , Andrés Pinar Solé , Hans Lischka , Mikuláš Matoušek , Jiri Brabec , Libor Veis , Alba Millan , Carlos Sánchez-Sánchez , Araceli G. Campaña , Juan M. Cuerva , Pavel Jelínek
Molecular π-magnets based on single organic molecules have attracted increasing attention for their potential applications in optoelectronics and spintronics. Global aromaticity in conjugated macrocyclic polyradicaloids is still an open question that has only been tackled in molecules with an even number of electrons. Here, we report the on-surface synthesis of a cyclopenta-ring-fused oligo(m-phenylene) macrocycle, 9MC, with an odd number of electrons. The generated polyradicaloid undergoes a surface-induced distortion to a D3h symmetry with a fully delocalized doublet ground state. Interestingly, 9MC exhibits two aromatic annulene-within-an-annulene (AWA) ring currents in the inner and outer rings.
基于单一有机分子的分子π磁体因其在光电子学和自旋电子学中的潜在应用而受到越来越多的关注。共轭大环多核物的全局芳香性仍是一个未决问题,目前只在电子数为偶数的分子中得到解决。在此,我们报告了奇数电子数的环戊环融合低聚(间苯二酚)大环 9MC 的表面合成。生成的多辐射类化合物在表面诱导下畸变为 D3h 对称性,并具有完全去局域化的双基态。有趣的是,9MC 在内环和外环中显示出两个芳香环烯-环内-烯(AWA)环电流。
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引用次数: 0
Sequence-defined main-chain photoswitching macromolecules with odd-even-effect-controlled properties 具有奇偶效应控制特性的序列定义主链光开关大分子
IF 19.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-02-13 DOI: 10.1016/j.chempr.2024.10.008
Linh Duy Thai , Jochen A. Kammerer , Dmitri Golberg , Hatice Mutlu , Christopher Barner-Kowollik
The installation of stimuli-responsive moieties into their main chain maximizes the stimuli response of polymers. Yet, facile and orthogonal synthesis of such complex macromolecules is a daunting challenge, especially for achieving absolute chain-end-group fidelity, monodispersity, and the formation of block copolymers (BCPs). We harness metal-free hydroxyl-yne click and deprotection chemistry to realize monodisperse, sequence-defined oligomers and BCPs featuring α-bisimines as main-chain photoswitches and orthogonally incorporate functional terminal groups (olefins, acrylates, and non-activated alkynes). We reveal the significant influence of the sequence on solution and solid-state material properties, which manifests as a strong odd-even effect on the hydrodynamic volume, glass transition temperature, and BCP domain spacing. The odd-even effect originates from the distinct symmetries of the sequences resulting from our precise synthetic strategy. Thus, our sequence-defined, orthogonal synthesis strategy with near absolute chain-end-group fidelity and wide functional group compatibility paves the way toward complex polymeric materials with precise properties, topology, composition, and main-chain functionalities.
在聚合物主链中加入刺激响应分子可最大限度地提高聚合物的刺激响应。然而,这种复杂大分子的简便正交合成是一项艰巨的挑战,尤其是在实现绝对的链端基团保真度、单分散性和形成嵌段共聚物(BCP)方面。我们利用无金属羟基-炔单击和脱保护化学来实现单分散、序列确定的低聚物和 BCP,其特点是以α-二亚胺作为主链光开关,并正交加入功能性末端基团(烯烃、丙烯酸酯和非活化炔)。我们揭示了序列对溶液和固态材料特性的重大影响,表现为对流体力学体积、玻璃化转变温度和 BCP 域间距的强烈奇偶效应。奇偶效应源于我们精确的合成策略所产生的序列的独特对称性。因此,我们的序列定义正交合成策略具有近乎绝对的链端组保真度和广泛的官能团兼容性,为实现具有精确性质、拓扑结构、组成和主链功能的复杂聚合物材料铺平了道路。
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引用次数: 0
Ordered [2]catenanes in covalent organic frameworks: From molecules to materials 共价有机框架中的有序[2]链烷:从分子到材料
IF 19.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-02-13 DOI: 10.1016/j.chempr.2024.10.024
Ruozhou Huang , Yuping Wang
In a recent issue of Chem, an innovative approach for the synthesis of crystalline [2]catenane-containing covalent organic frameworks was developed. This breakthrough elucidates how the dynamics of microscopic, interlocked components influence material properties, thereby advancing the design of two-dimensional materials with sophisticated topological features.
在最近一期的《化学》(Chem)杂志上,研究了一种合成含[2]链烷的结晶共价有机骨架的创新方法。这一突破阐明了微观、互锁组分的动力学如何影响材料性能,从而推进了具有复杂拓扑特征的二维材料的设计。
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引用次数: 0
Ion-dipole interaction manipulated bilateral interface chemistry for deep rechargeability and high redox activity of Zn-organic batteries
IF 23.5 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-02-13 DOI: 10.1016/j.chempr.2025.102411
Yanyan Chen, Bowen Yin, Yinxiang Zeng, Hongfei Wang, Bin-Bin Xie, Deyan Luan, Yong Hu, Xiong Wen (David) Lou
The practical application of Zn-based batteries is compromised by rampant dendrite growth, unfavorable side reactions, and serious capacity decay. We report a trifunctional glutarimide (Glu) electrolyte additive to stabilize the electrochemical reaction of the Zn anode and facilitate redox activity of the cathode. Theoretical calculations and spectroscopic characterizations reveal that Glu with the electron-withdrawing/donating capability can substitute partially coordinated water and manipulate the solvation structure by reinforced ion-dipole interactions. Meanwhile, Glu can form a solid electrolyte interphase layer and alleviate parasitic reactions. Consequently, Glu renders excellent Zn plating/stripping cycling of 2,000 h at 1 mA cm−2/1 mAh cm−2. Even at an ultra-high depth of discharge of 85.2%, a stable cycling of 138 h is obtained. The formulated additive serves as the charge redistributor and decouples the cation-anion interaction to stabilize the interaction of ClO4 with the half-oxidized protonated polyaniline, enabling the Zn-organic battery with enhanced energy storage performance.
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引用次数: 0
2D covalent organic framework via catenation 通过催化反应实现二维共价有机框架
IF 19.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-02-13 DOI: 10.1016/j.chempr.2024.09.006
Thirumurugan Prakasam , Sudhir Kumar Sharma , Florent Ravaux , Farah Benyettou , Matteo Lusi , Varghese Sabu , Philippe Bazin , Thomas Delclos , Ramesh Jagannathan , Jamie Whelan , Mohamad El-Roz , Mark A. Olson , Mahmoud Abdellatief , Obieda S. Mudraj , Felipe Gándara , Ali Trabolsi
Molecular-level structural modification is a well-established approach to impart advanced functionality to materials that continues to be the focus of research and development in both academic and industrial laboratories. Here, we report the synthesis of an ordered two-dimensional (2D) poly[2]catenate from the simultaneous self-assembly of two organic ligands and a metal salt by the formation of catenate links using metal coordination and imine condensation reactions. Subsequent chemical reduction of the imine bonds generated the corresponding demetallized poly[2]catenane, which was found to have greater non-rigid-body-like character than the poly[2]catenate as a result of the increased internal dynamics of the mechanical bonds and resulted in an 8-fold increase in elasticity. This synthetic approach allowed for the efficient incorporation of mechanically interlocked molecules (MIMs) within a 2D ordered structure and demonstrated their importance in improving the physical properties of materials by accessing molecular degrees of freedom that cannot be achieved by other means.
分子级结构修饰是赋予材料高级功能的一种行之有效的方法,一直是学术界和工业界实验室的研发重点。在此,我们报告了利用金属配位和亚胺缩合反应形成的烯酸链节,通过两种有机配体和一种金属盐的同时自组装合成有序二维(2D)聚[2]烯酸酯的过程。随后对亚胺键进行化学还原,生成了相应的脱金属聚[2]卡烯酸酯,由于机械键的内部动态增加,这种聚[2]卡烯酸酯比聚[2]卡烯酸酯具有更强的非刚性体特性,并使弹性增加了 8 倍。这种合成方法可以在二维有序结构中有效地加入机械互锁分子(MIMs),并通过获得其他方法无法实现的分子自由度,证明了它们在改善材料物理性质方面的重要性。
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引用次数: 0
Anion-coordination- and π-π-stacking-interaction-driven assembly of a complex Frank-Kasper structure 阴离子配位和π-π堆积相互作用驱动的复杂弗兰克-卡斯帕结构组装
IF 19.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-02-13 DOI: 10.1016/j.chempr.2024.11.009
Zhu Zhuo , Zi-Ang Nan , Wen-Zheng Fu , Wei Wang , Guo-Ling Li , Ming-Yan Wu , Maochun Hong , You-Gui Huang
Constructing artificial sophisticated architectures from simple small-molecular subunits by cooperative interactions remains one of the most formidable challenges. Herein, we report a complex supramolecular structure, {{[CoL(SCN)]20}{[CoL(SCN)]24}3(SO4)23(HSO4)46}·246(CH3CN) (1), that arises from the assembly of [CoL(SCN)]+ with SO42− and HSO4 (L = tris(2-benzimidazolylmethyl)amine) under solvothermal condition. The crystallization of compound 1 is driven by the cooperation of the π-π stacking interactions between [CoL(SCN)]+ cations and the hydrogen bonds between [CoL(SCN)]+ and SO42− and HSO4. [CoL(SCN)]+ cations self-associate through intermolecular π-π stacking interactions to create two π-stacked polyhedral 512-{[CoL(SCN)]20} dodecahedra and 51262-{[CoL(SCN)]24} tetrakaidekahedra. These two π-stacked polyhedral subunits coexist in the same lattice in a 1:3 ratio and coordinate with SO42− and HSO4, resulting in a complex Frank-Kasper (FK) A15 structure. This research demonstrates that small-molecular scaffolds can assemble into sophisticated architectures and creates exciting perspectives for constructing sophisticated clathrate structures from simple small molecules.
从简单的小分子亚基通过协同作用构建人工精密结构,仍然是最艰巨的挑战之一。在此,我们报告了一种复杂的超分子结构,{{[CoL(SCN)]20}{[CoL(SCN)]24}3(SO4)23(HSO4)46}-246(CH3CN) (1),它是由[CoL(SCN)]+与 SO42- 和 HSO4-(L = 三(2-苯并咪唑基甲基)胺)在溶热条件下组装而成。化合物 1 的结晶是由 [CoL(SCN)]+ 阳离子之间的 π-π 堆叠相互作用以及 [CoL(SCN)]+ 与 SO42- 和 HSO4- 之间的氢键协同作用驱动的。[CoL(SCN)]+ 阳离子通过分子间的π-π堆叠作用自结合,形成两个π堆叠多面体 512-{[CoL(SCN)]20}十二面体和 51262-{[CoL(SCN)]24}四开二面体。这两个π堆叠多面体亚基以 1:3 的比例共存于同一晶格中,并与 SO42- 和 HSO4- 配合,形成复杂的弗兰克-卡斯帕(FK)A15 结构。这项研究表明,小分子支架可以组装成复杂的结构,并为利用简单的小分子构建复杂的凝块结构开辟了令人兴奋的前景。
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