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Visual sensing Ni2+ in real samples with test paper based on a new dinuclear terbium complex† 基于新型双核铽配合物†的试纸视觉检测实际样品中的Ni2+
IF 2.6 3区 化学
CrystEngComm Pub Date : 2025-05-21 DOI: 10.1039/D5CE00117J
Ziyan Cai, Ping Li, Xiaobo Yu, Lin Lai, Cilin Yu, Yuan Hu, Xiaolei Gao and Chenghui Zeng
{"title":"Visual sensing Ni2+ in real samples with test paper based on a new dinuclear terbium complex†","authors":"Ziyan Cai, Ping Li, Xiaobo Yu, Lin Lai, Cilin Yu, Yuan Hu, Xiaolei Gao and Chenghui Zeng","doi":"10.1039/D5CE00117J","DOIUrl":"https://doi.org/10.1039/D5CE00117J","url":null,"abstract":"<p >Nickel (Ni) is an essential metal element widely used in industrial production and daily life; however, long-term human exposure to nickel may lead to skin allergies, damage to genetic material, and even the possible induction of cancer. Therefore, the development of an accurate, rapid, and convenient method for detecting Ni<small><sup>2+</sup></small> is of importance. In this work, rare earth dinuclear complex <strong>Tb-TFBA</strong> is designed and its precise structure is analyzed by single crystal analysis. Experimental results show that <strong>Tb-TFBA</strong> possesses strong anti-interference capabilities, short response time (20 s), and an extremely low detection limit (LOD = 0.1 nM); the LOD is significantly lower than the minimum detection value of the national safety standards for drinking water (20 nM, GB 5749-2022). Furthermore, a portable sensing device of test paper is developed based on <strong>Tb-TFBA</strong>. The device achieves specific visual detection of Ni<small><sup>2+</sup></small> in real samples, which is portable and easy to use in daily life.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 25","pages":" 4304-4311"},"PeriodicalIF":2.6,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367129","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
Subcomponent self-assembly approach in molecular cages and its implication on solution behavior 分子笼中的子组分自组装方法及其对溶液行为的影响
IF 2.6 3区 化学
CrystEngComm Pub Date : 2025-05-21 DOI: 10.1039/D5CE00343A
A-Mei Yang, Xiao-Huan Qin, Hai-Ye Li, Di Yao and Fu-Ping Huang
{"title":"Subcomponent self-assembly approach in molecular cages and its implication on solution behavior","authors":"A-Mei Yang, Xiao-Huan Qin, Hai-Ye Li, Di Yao and Fu-Ping Huang","doi":"10.1039/D5CE00343A","DOIUrl":"https://doi.org/10.1039/D5CE00343A","url":null,"abstract":"<p >Molecular cages are generally divided into covalent organic cages (COCs) and metal–organic cages (MOCs), which are formed through the self-assembly of organic or metal–organic building blocks. In this review, an overview of the design principles, synthetic strategies, and applications of COCs and MOCs are presented. The subcomponent self-assembly approach relies on the synergetic formation of coordination and covalent bonds between organic subcomponents and metal ions to construct complex architectures. Mass spectrometry technology is promising for analyzing the solution behavior and monitoring the formation process of such sophisticated supramolecular aggregations.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 27","pages":" 4634-4641"},"PeriodicalIF":2.6,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573042","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
Insights into the structural and microscopic origin of magnetic and optical properties of monodispersed γ-Fe2O3, ZnO, γ-Fe2−2xZn2xO3 and γ-Fe2O3@ZnO nanostructures† 单分散γ- fe2o3、ZnO、γ- fe2−2xZn2xO3和γ-Fe2O3@ZnO纳米结构†磁性和光学性质的结构和微观起源
IF 2.6 3区 化学
CrystEngComm Pub Date : 2025-05-21 DOI: 10.1039/D5CE00317B
Ruchi Agrawal, Manas Srivastava, Debashish Sarkar and Raghumani Singh Ningthoujam
{"title":"Insights into the structural and microscopic origin of magnetic and optical properties of monodispersed γ-Fe2O3, ZnO, γ-Fe2−2xZn2xO3 and γ-Fe2O3@ZnO nanostructures†","authors":"Ruchi Agrawal, Manas Srivastava, Debashish Sarkar and Raghumani Singh Ningthoujam","doi":"10.1039/D5CE00317B","DOIUrl":"https://doi.org/10.1039/D5CE00317B","url":null,"abstract":"&lt;p &gt;Monodispersed γ-Fe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;, ZnO, γ-Fe&lt;small&gt;&lt;sub&gt;2−2&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt;Zn&lt;small&gt;&lt;sub&gt;2&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt; (substitution, SUB) and γ-Fe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;@ZnO (core@shell, CS) nanoparticles were synthesized via a thermolysis method, and their changes in optical and magnetic behaviour were investigated. γ-Fe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;, γ-Fe&lt;small&gt;&lt;sub&gt;2−2&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt;Zn&lt;small&gt;&lt;sub&gt;2&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt; and γ-Fe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;@ZnO nanoparticles were crystallized in cubic structure, whereas ZnO was found to be amorphous. γ-Fe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt; nanoparticles were spherical, whereas SUB and CS nanoparticles were nanorods. In the magnetization versus applied magnetic field (&lt;em&gt;M&lt;/em&gt;–&lt;em&gt;H&lt;/em&gt; curve) study, γ-Fe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt; nanoparticles were superparamagnetic at room temperature and ferromagnetic at 5 K. At room temperature, SUB nanoparticles showed paramagnetic behaviour at an applied magnetic field below 2500 Oe, and above 2500 Oe, these nanoparticles exhibited diamagnetic behaviour, which can be attributed to the contribution of ZnFe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;/small&gt; and ZnO. At 5 K, SUB nanoparticles exhibited paramagnetic behaviour. CS nanoparticles showed paramagnetic/diamagnetic behaviour at room temperature but showed weak ferromagnetic behaviour at 5 K. This can be represented as small size core γ-Fe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;@interface ZnFe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;/small&gt;@shell ZnO. ZnO nanoparticles were diamagnetic at room temperature, but it became paramagnetic at 5 K. At zero-field cooled and field-cooled curves, γ-Fe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt; nanoparticles showed a blocking temperature (&lt;em&gt;T&lt;/em&gt;&lt;small&gt;&lt;sub&gt;B&lt;/sub&gt;&lt;/small&gt;) at 210 K. ZnO, SUB and CS nanoparticles showed a peak at 50–60 K in the zero-field cooled curve, which suggested the presence of antiferromagnetic interactions in these materials. In the photoluminescence study, luminescence intensity was highest in ZnO, followed by CS, SUB and γ-Fe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;. In terms of the proximity effect, SUB could be considered as ZnFe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;/small&gt;/ZnO/FeO (mixture), whereas CS could be considered as γ-Fe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;/small&gt;@ZnFe&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;/small&gt;@ZnO (core@interface@shell). The decrease in photoluminescence intensity was owing to the presence of magnetic impurities, which was supported by the decay lifetime study. The relations between crystal structure, microstructures, magnetic and optical properties are studied in this work","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 23","pages":" 3931-3946"},"PeriodicalIF":2.6,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244041","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
Advanced characterization techniques for the coking process of zeolites: a comprehensive review 沸石焦化过程的先进表征技术综述
IF 2.6 3区 化学
CrystEngComm Pub Date : 2025-05-21 DOI: 10.1039/D5CE00156K
Xiaoyuan Gao, Ping Sun, Jialiang Liao and Liwei Xia
{"title":"Advanced characterization techniques for the coking process of zeolites: a comprehensive review","authors":"Xiaoyuan Gao, Ping Sun, Jialiang Liao and Liwei Xia","doi":"10.1039/D5CE00156K","DOIUrl":"https://doi.org/10.1039/D5CE00156K","url":null,"abstract":"<p >Zeolites, as a class of inorganic porous materials with ordered pore structures, are widely utilized in heterogeneous catalysis, petrochemical processes, environmental protection, and biomedicine due to their excellent selectivity, ion-exchange capacity, high thermal stability, and tunable acidity. However, during catalytic reactions, the gradual deposition of carbonaceous intermediates leads to coke formation, resulting in pore blockage and active site coverage in zeolites. This significantly reduces their catalytic activity and service life. The coking process is highly complex and limits the industrial applications of zeolites, making it essential to employ advanced characterization techniques for an in-depth study of coking behavior to better understand and address this critical issue. In this paper, we detail the important role played by various characterization techniques in the in-depth study of coking in the following four aspects: i) origin of coke; ii) factors affecting coke formation; iii) types of coke; and iv) impacts of coking on zeolites. Our review provides an effective scientific basis for the development of new zeolite catalysts with excellent carbon build-up resistance and efficient regeneration techniques, thus improving the stability and catalytic efficiency of zeolite catalysts in industrial applications.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 22","pages":" 3616-3642"},"PeriodicalIF":2.6,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196996","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
A multicomponent crystal approach with increased permeability of cocrystal of emtricitabine with zwitterionic l-proline† 一种增加恩曲他滨与两性离子l-脯氨酸†共晶渗透性的多组分晶体方法
IF 2.6 3区 化学
CrystEngComm Pub Date : 2025-05-20 DOI: 10.1039/D5CE00215J
Daliya K. Shajan, Palanisamy Kandhan, Alexey N. Kuznetsov, Vladimir V. Chernyshev and Palash Sanphui
{"title":"A multicomponent crystal approach with increased permeability of cocrystal of emtricitabine with zwitterionic l-proline†","authors":"Daliya K. Shajan, Palanisamy Kandhan, Alexey N. Kuznetsov, Vladimir V. Chernyshev and Palash Sanphui","doi":"10.1039/D5CE00215J","DOIUrl":"https://doi.org/10.1039/D5CE00215J","url":null,"abstract":"<p >This investigation reports the synthesis and structural characterization of a zwitterionic cocrystal comprising anti-retroviral emtricitabine (ECB) and <small>L</small>-proline (PRL), explicitly designed to enhance intestinal permeability. The cocrystal was synthesized <em>via</em> a liquid-assisted grinding (LAG) methodology, utilizing PRL as a naturally occurring amino acid to modulate the physicochemical attributes of ECB. Comprehensive characterization was performed using multiple analytical techniques, including infrared (IR) spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and powder X-ray diffraction (PXRD), with the crystal structure elucidated through Rietveld refinement of high-resolution PXRD data. The crystal structure (<em>P</em>2<small><sub>1</sub></small>2<small><sub>1</sub></small>2<small><sub>1</sub></small>, <em>Z</em> = 4) indicates alternate packing arrangements involving 2-aminopyrimidine (ECB)⋯ammonium carboxylate (PRL) and hydroxyl (ECB)⋯carboxylate (PRL) heterosynthons. <em>In vitro</em> diffusion studies conducted in pH 6.8 phosphate buffer demonstrated superior permeation characteristics compared to the parent drug, which is correlated with its enhanced solubility and alternate packing motif. Notably, the zwitterionic cocrystal exhibited enhanced diffusion properties with a 1.2-fold increase in flux compared to the native drug. This study provides pioneering insights into the structural aspects of the first zwitterionic amino acid cocrystal with ECB.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 25","pages":" 4292-4303"},"PeriodicalIF":2.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367128","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
Structure, optical properties and energy transfer analysis of Nd3+, Dy3+ co-doped CeF3 crystal for potential laser application Nd3+、Dy3+共掺CeF3晶体的结构、光学性质及能量转移分析
IF 2.6 3区 化学
CrystEngComm Pub Date : 2025-05-19 DOI: 10.1039/D5CE00225G
Jiaqi Xia, Guoliang Deng, Yilun Yang, Min Xu, Shanming Li, Qiannan Fang, Chengchun Zhao and Yin Hang
{"title":"Structure, optical properties and energy transfer analysis of Nd3+, Dy3+ co-doped CeF3 crystal for potential laser application","authors":"Jiaqi Xia, Guoliang Deng, Yilun Yang, Min Xu, Shanming Li, Qiannan Fang, Chengchun Zhao and Yin Hang","doi":"10.1039/D5CE00225G","DOIUrl":"https://doi.org/10.1039/D5CE00225G","url":null,"abstract":"<p >A crack-free Nd<small><sup>3+</sup></small>, Dy<small><sup>3+</sup></small> co-doped CeF<small><sub>3</sub></small> single crystal was synthesized through the Bridgman method, and a thorough investigation of its crystal structure and optical properties was conducted. The analysis of energy transfer processes between Nd<small><sup>3+</sup></small> and Dy<small><sup>3+</sup></small> was conducted as well. The XRD pattern shows that Nd,Dy:CeF<small><sub>3</sub></small> was crystallized in the hexagonal system and the calculated lattice parameters of the as-grown crystal are <em>a</em> = 7.1161 Å and <em>c</em> = 7.2708 Å. Through the absorption spectrum, J–O theory calculation was carried out, and results show that the radiative lifetimes of Nd<small><sup>3+</sup></small>:<small><sup>4</sup></small>F<small><sub>3/2</sub></small> and Dy<small><sup>3+</sup></small>:<small><sup>4</sup></small>F<small><sub>9/2</sub></small> levels in the Nd,Dy:CeF<small><sub>3</sub></small> crystal are 189.93 μs and 989.61 μs, respectively. The maximum emission cross-sections of the Nd<small><sup>3+</sup></small>:<small><sup>4</sup></small>F<small><sub>3/2</sub></small> → <small><sup>4</sup></small>I<small><sub>11/2</sub></small> transition and Dy<small><sup>3+</sup></small>:<small><sup>4</sup></small>F<small><sub>9/2</sub></small> → <small><sup>6</sup></small>H<small><sub>13/2</sub></small> transition are 2.23 × 10<small><sup>−20</sup></small> cm<small><sup>2</sup></small> and 0.30 × 10<small><sup>−20</sup></small> cm<small><sup>2</sup></small> in the crystal. The fluorescence lifetimes of Nd<small><sup>3+</sup></small>:<small><sup>4</sup></small>F<small><sub>3/2</sub></small> and Dy<small><sup>3+</sup></small>:<small><sup>4</sup></small>F<small><sub>9/2</sub></small> levels are 104.00 μs and 298.03 μs, respectively. The laser induced damage threshold of the Nd,Dy:CeF<small><sub>3</sub></small> crystal is estimated to be 31.63 J cm<small><sup>−2</sup></small> through a single pulsed laser system (pumping wavelength: 1064 nm; pulse width: 9 ns). The analysis of energy transfer between Nd<small><sup>3+</sup></small> and Dy<small><sup>3+</sup></small> reveals that a large portion of energy transfers from Nd<small><sup>3+</sup></small> to Dy<small><sup>3+</sup></small> and then utilized by Dy<small><sup>3+</sup></small> for IR fluorescence emission; thus, the emission cross-section of the band around 1.3 μm is enhanced. These results indicate that the Nd,Dy:CeF<small><sub>3</sub></small> crystal is a potential material for IR laser operation.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 22","pages":" 3790-3799"},"PeriodicalIF":2.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197016","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
Three-dimensional conductive copper–organic framework with a dual-redox center for high-performance aqueous zinc batteries† 三维导电铜有机框架与双氧化还原中心高性能水性锌电池†
IF 2.6 3区 化学
CrystEngComm Pub Date : 2025-05-19 DOI: 10.1039/D5CE00164A
Jiacun Wang, Yuanxiang Gu and Qingliang Lv
{"title":"Three-dimensional conductive copper–organic framework with a dual-redox center for high-performance aqueous zinc batteries†","authors":"Jiacun Wang, Yuanxiang Gu and Qingliang Lv","doi":"10.1039/D5CE00164A","DOIUrl":"https://doi.org/10.1039/D5CE00164A","url":null,"abstract":"<p >Metal–organic frameworks (MOFs) are promising cathode materials for aqueous zinc-ion batteries (ZIBs) in view of their tunable molecular structures, high porosity, and cost-effectiveness. However, their applications are severely hindered by the inferior structure stability, low conductivity, and limited number of redox-active centers. Here, we well-design a three-dimensional (3D) conductive copper–organic framework (Cu-TAPT) cathode material with dual electroactive sites for high-performance ZIBs. The Cu-TAPT cathodes are composed of in-plane one-dimensional π-d conjugated chains and strong π–π interactions between adjacent chains, which are further bridged by another column of stacked chains by tetrahedral coordination to form an extended 3D structure. The redox chemistry of both Cu<small><sup>2+</sup></small> ions and conjugated carbonyl of Cu-TAPT cathodes achieves reversible Zn<small><sup>2+</sup></small>/H<small><sup>+</sup></small> synergistic storage. As a result, the Cu-TAPT cathode delivers a high reversible capacity of 273.1 mAh g<small><sup>−1</sup></small> at 0.1 A g<small><sup>−1</sup></small>, superior rate performance, and a high capacity retention over 75% after 1000 cycles. This work will provide a new philosophy to design advanced organic materials for aqueous ZIBs and beyond.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 22","pages":" 3800-3805"},"PeriodicalIF":2.6,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197008","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
Facile synthesis of palladium hierarchical nanosheet assemblies: unraveling the aggregation-induced synergistic effect for enhanced methanol oxidation reaction activity† 钯层次化纳米片组装的简易合成:揭示聚集诱导的增强甲醇氧化反应活性的协同效应
IF 2.6 3区 化学
CrystEngComm Pub Date : 2025-05-16 DOI: 10.1039/D5CE00360A
Lijuan Han, Yuanyuan Min, Yingying Wang, Feng Liu, Maochang Liu and Yiqun Zheng
{"title":"Facile synthesis of palladium hierarchical nanosheet assemblies: unraveling the aggregation-induced synergistic effect for enhanced methanol oxidation reaction activity†","authors":"Lijuan Han, Yuanyuan Min, Yingying Wang, Feng Liu, Maochang Liu and Yiqun Zheng","doi":"10.1039/D5CE00360A","DOIUrl":"https://doi.org/10.1039/D5CE00360A","url":null,"abstract":"<p >This study presents a facile strategy for synthesizing hierarchical palladium (Pd) nanosheet assemblies with enhanced methanol oxidation reaction (MOR) activity. The nanostructures were engineered through a one-pot co-reduction approach, where sodium tetrachloropalladate(<small>II</small>) was co-reduced by ascorbic acid and citric acid in an ice water bath. Mechanism studies suggested that the dendritic seeds formed at early stages directed the hierarchical assembly of Pd nanosheets, where the lamellar micelle structure of octadecyltrimethylammonium group guides the anisotropic 2D growth of Pd nanosheets. Due to the interconnected, porous nanosheet networks with high electrochemically active surface areas, electrochemical evaluations revealed an aggregation-induced synergistic effect, where the densely packed nanosheet assemblies exhibited a mass activity of 276.1 mA mg<small><sub>Pd</sub></small><small><sup>−1</sup></small> and a specific activity of 1.92 mA cm<small><sup>−2</sup></small>—values 2.1 times and 4 times higher, respectively, than those of benchmark Pt/C catalysts. Density functional theory (DFT) simulations suggest that the tensile lattice strain of Pd enhances the adsorption ability of adsorbed species during the MOR and consequently boosts catalytic activity. This work not only advances the design of high-performance MOR catalysts but also elucidates the critical role of nanoscale aggregation in amplifying electrocatalytic performance.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 22","pages":" 3769-3777"},"PeriodicalIF":2.6,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144197014","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 organic and alkali metal cations over a crystal lattice of the benzenetrihydroxy trisulfonate ligand† 有机和碱金属阳离子对苯三羟基三磺酸配体晶格的影响
IF 2.6 3区 化学
CrystEngComm Pub Date : 2025-05-16 DOI: 10.1039/D5CE00320B
Ranjay K. Tiwari, Jitendra Kumar and J. N. Behera
{"title":"Influence of organic and alkali metal cations over a crystal lattice of the benzenetrihydroxy trisulfonate ligand†","authors":"Ranjay K. Tiwari, Jitendra Kumar and J. N. Behera","doi":"10.1039/D5CE00320B","DOIUrl":"https://doi.org/10.1039/D5CE00320B","url":null,"abstract":"<p >A crystallographic investigation of the 2,4,6-trihydroxybenzene-1,3,5-trisulfonic acid ligand (H<small><sub>6</sub></small>L) with various cations was conducted. The melamine adduct exhibited an H-bonded three-dimensional lattice (<strong>1</strong>), guanidine incorporation resulted in the formation of a two-dimensional (2D) layer (<strong>2</strong>) with unusual loss of aromaticity of the ligand and reaction with potassium ion afforded a three-dimensional (3D) network (<strong>3</strong>) with channels that possessed an H-bonded water chain. The proton conductivity of <strong>3</strong> was 2.61 × 10<small><sup>−7</sup></small> S cm<small><sup>−1</sup></small> at room temperature, indicating its potential application in proton-conducting materials.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 24","pages":" 4116-4124"},"PeriodicalIF":2.6,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144299471","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
A hydrogen-bonded organic framework with ultramicroporous channels based on proline and dl-2-phenoxypropionic acid† 基于脯氨酸和dl-2-苯氧丙酸†的超微孔通道氢键有机骨架
IF 2.6 3区 化学
CrystEngComm Pub Date : 2025-05-16 DOI: 10.1039/D5CE00357A
Timothy Steenhaut, Xiao Li, Fuli Zhou, Koen Robeyns, Tom Leyssens, Yaroslav Filinchuk and Oleksii Shemchuk
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