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Chinese Journal of Structural Chemistry最新文献

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Improving the electrocatalysts for conversion-type anodes of alkali-ion batteries 改进碱性离子电池转换型阳极的电催化剂
IF 5.9 4区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Chinese Journal of Structural Chemistry
Pub Date : 2024-07-01 DOI: 10.1016/j.cjsc.2024.100408
Ajay Piriya Vijaya Kumar saroja, Yuhan Wu, Yang Xu
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引用次数: 0
Promoting energy transfer pathway in porphyrin-based sp2 carbon-conjugated covalent organic frameworks for selective photocatalytic oxidation of sulfide 促进卟啉基 Sp2 碳共轭共价有机框架中的能量转移途径，实现硫化物的选择性光催化氧化
IF 5.9 4区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Chinese Journal of Structural Chemistry
Pub Date : 2024-07-01 DOI: 10.1016/j.cjsc.2024.100299

The sp2 carbon-conjugated covalent organic frameworks (COFs) with fully π-conjugated lattice and high chemical stability are promising heterogeneous photocatalysts. Herein, we report the design and synthesis of a novel palladium (Pd) porphyrin-based sp2 carbon-conjugated COF (PdPor-sp2c-COF) with an eclipsed AA stacking 2D structure. Interestingly, PdPor-sp2c-COF showed high crystallinity, good chemical stability, and a broad absorption of visible light. Moreover, compared to our previously reported metal-free Por-sp2c-COF, PdPor-sp2c-COF displays an improved photocatalytic performance in the selective aerobic oxidation of sulfides under green light irradiation. The systematic mechanistic studies testified that the enhanced photocatalytic activity can be ascribed to promoting energy transfer pathway over PdPor-sp2c-COF. Our study clearly demonstrates that it is favorable to promote the energy transfer pathway in sp2 carbon-conjugated COFs by using metalloporphyrin-based molecular building blocks. This work will inspire us to design and synthesize novel photocatalysts based on COFs for the selective aerobic oxidation.

具有完全π-共轭晶格和高化学稳定性的sp碳共轭有机框架（COFs）是一种前景广阔的异相光催化剂。在此，我们报告了一种新型钯（Pd）卟啉基 sp 碳共轭 COF（PdPor-spc-COF）的设计与合成，该 COF 具有黯淡的 AA 堆积二维结构。有趣的是，PdPor-spc-COF 结晶度高，化学稳定性好，对可见光有广泛的吸收。此外，与之前报道的无金属 Por-spc-COF 相比，PdPor-spc-COF 在绿光照射下选择性有氧氧化硫化物的光催化性能有所提高。系统的机理研究证明，PdPor-spc-COF 光催化活性的增强可归因于促进了能量转移途径。我们的研究清楚地表明，使用金属卟啉基分子构筑模块有利于促进 sp 碳共轭 COF 的能量转移途径。这项工作将启发我们设计和合成基于 COFs 的新型光催化剂，用于选择性有氧氧化。
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引用次数: 0
Achieving Ullmann coupling reaction via photothermal synergy with ultrafine Pd nanoclusters supported on mesoporous TiO2 通过介孔二氧化钛上支持的超细钯纳米团簇的光热协同作用实现乌尔曼偶联反应
IF 5.9 4区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Chinese Journal of Structural Chemistry
Pub Date : 2024-07-01 DOI: 10.1016/j.cjsc.2024.100305
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引用次数: 0
Interconnecting zero-dimensional porous organic cages into sub-8 nm nanofilm for bio-inspired separation 将零维多孔有机笼互连到 8 纳米以下的纳米薄膜中，实现生物启发式分离
IF 5.9 4区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Chinese Journal of Structural Chemistry
Pub Date : 2024-07-01 DOI: 10.1016/j.cjsc.2024.100312
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引用次数: 0
Susceptible constriction enabling fast cycling of lithium metal in solid-state batteries: Silicon as an example 固态电池中的锂金属可通过易收缩性实现快速循环：以硅为例
IF 5.9 4区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Chinese Journal of Structural Chemistry
Pub Date : 2024-07-01 DOI: 10.1016/j.cjsc.2024.100276
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引用次数: 0
Covalent organic frameworks for artificial photosynthetic diluted CO2 reduction 用于人工光合作用稀释二氧化碳还原的共价有机框架
IF 5.9 4区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Chinese Journal of Structural Chemistry
Pub Date : 2024-07-01 DOI: 10.1016/j.cjsc.2024.100307
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引用次数: 0
Dynamic assembly of chiral golden knots 手性金结的动态组装
IF 5.9 4区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Chinese Journal of Structural Chemistry
Pub Date : 2024-07-01 DOI: 10.1016/j.cjsc.2024.100300
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引用次数: 0
MXene-based materials for separator modification of lithium-sulfur batteries 用于锂硫电池隔膜改性的 MXene 基材料
IF 5.9 4区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Chinese Journal of Structural Chemistry
Pub Date : 2024-07-01 DOI: 10.1016/j.cjsc.2024.100337

Lithium-sulfur (Li–S) batteries are one of the promising energy storage systems. However, rapid capacity attenuation caused by shuttle effect of soluble polysulfides is a major challenge in practical application. The separator modification is one complementary countermeasure besides the construction of sulfur host materials in cathode. MXene is one type of outstanding candidates for promoting redox kinetics of sulfur species. Herein, recent advances of MXene-based materials as separator modifiers are summarized. The importance of high conductivity and catalytic effects in promoting catalytic conversion of polysulfides and suppressing shuttle effect of polysulfides has been highlighted, and the superiority of MXene for improving reversible capacity and cycling stability has been demonstrated. New strategies for the design of MXene-based separator modifiers are proposed to improve energy density and lifetime. The review provides new perspectives for future development of high-performance Li–S batteries.

锂硫（Li-S）电池是前景广阔的储能系统之一。然而，可溶性多硫化物的穿梭效应导致容量迅速衰减，是实际应用中的一大挑战。除了在阴极中构建硫主材料外，隔膜改性也是一种补充对策。MXene 是促进硫氧化还原动力学的一种优秀候选材料。在此，总结了以 MXene 为基础的材料作为分离器改性剂的最新进展。高电导率和催化效应在促进多硫化物催化转化和抑制多硫化物穿梭效应方面的重要性得到了强调，MXene 在提高可逆容量和循环稳定性方面的优越性也得到了证明。还提出了设计基于 MXene 的分离器改性剂的新策略，以提高能量密度和使用寿命。该综述为高性能锂-S 电池的未来发展提供了新的视角。
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引用次数: 0
Improved Polymer Electrolyte Interfacial Contact via Constructing Vertically Aligned Fillers 通过构建垂直排列的填料改善聚合物电解质界面接触
IF 5.9 4区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Chinese Journal of Structural Chemistry
Pub Date : 2024-07-01 DOI: 10.1016/j.cjsc.2024.100406
Xu Li, Yue Zhao, Tingli Ma
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引用次数: 0
Mechanistic analysis of Co2VO4/X (X = Ni, C) heterostructures as anode materials of lithium-ion batteries 作为锂离子电池负极材料的 Co2VO4/X（X = Ni、C）异质结构的机理分析
IF 5.9 4区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR
Chinese Journal of Structural Chemistry
Pub Date : 2024-07-01 DOI: 10.1016/j.cjsc.2024.100309
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引用次数: 0
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