CrystEngComm最新文献_第2页

Controlling the architecture of Au/Pt core–shell nanocubes via platinum growth mode†

IF 2.6 3区化学

CrystEngComm Pub Date : 2024-11-20 DOI: 10.1039/D4CE00823E

Imke Maack, Kevin Oldenburg and Katharina Al-Shamery

{"title":"Controlling the architecture of Au/Pt core–shell nanocubes via platinum growth mode†","authors":"Imke Maack, Kevin Oldenburg and Katharina Al-Shamery","doi":"10.1039/D4CE00823E","DOIUrl":"https://doi.org/10.1039/D4CE00823E","url":null,"abstract":"In order to overcome the often large activation barriers in heterogeneous catalytic reactions, photocatalysis is a promising path to activate specific molecules with light at moderate temperatures. In particular, bimetallic nanoparticles combining the plasmonic properties of one metal with the high catalytic activity of another are promising antenna–reactor systems. As the nanocrystal surface structure is a major factor in steering surface electronic properties and accompanying activity and selectivity, it is of interest to control the metal nanoparticle growth and composition. The subject of this work is the synthesis of gold–platinum nanoparticles with varying architectures by controlling the growth mechanism. The selection of the reducing agent allows the regulation of the reduction rate of the platinum metal salt, which in turn affects the final morphology of the resulting bimetallic nanoparticles. This allows the synthesis of either core–shell nanocrystals with decorated nanocube corners or dendritic particles under otherwise identical reaction conditions. A dendritic structure requires the rapid deposition of platinum monomers on the surface of the gold particles. This process hinders the diffusion of platinum monomers to energetically preferred sites on the particle surface, which is possible during the formation of core–shell nanocrystals.","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 47","pages":" 6748-6756"},"PeriodicalIF":2.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ce/d4ce00823e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Boosting the oxygen vacancies in ZnO–Co3O4 composite by copper doping for bisphenol A abatement using persulfate† 通过掺铜提高氧化锌-Co3O4 复合材料中的氧空位，从而利用过硫酸盐† 消除双酚 A

IF 2.6 3区化学

CrystEngComm Pub Date : 2024-11-20 DOI: 10.1039/D4CE00971A

Lei Bai, Hui Yan, Jiao Wang, Qihang Wu, Guiling Wang, Yi Huang and Bentian Zhang

{"title":"Boosting the oxygen vacancies in ZnO–Co3O4 composite by copper doping for bisphenol A abatement using persulfate†","authors":"Lei Bai, Hui Yan, Jiao Wang, Qihang Wu, Guiling Wang, Yi Huang and Bentian Zhang","doi":"10.1039/D4CE00971A","DOIUrl":"https://doi.org/10.1039/D4CE00971A","url":null,"abstract":"Through surface leaching and ion exchange, nest-like Cu–Co3O4 and Cu–ZnO–Co3O4 composites were obtained from solid ZIF-67 and hollow ZIF-8–ZIF-67, respectively. Their characterizations suggested that the ratio of oxygen vacancies/lattice oxygen in Cu–ZnO–Co3O4 was much higher (1.61) than that of Cu–Co3O4 (0.47). The Cu–ZnO–Co3O4 composite exhibited an ultra-high persulfate (PDS) activation ability and could degrade the target organic contaminant molecule bisphenol A (BPA) in six minutes under the reaction conditions of 20 mg L−1 BPA, 0.1 g L−1 PDS and 0.1 g L−1 Cu–ZnO–Co3O4, demonstrating a degradation rate constant (k) of 0.84 min−1, which was over 28-fold higher than that of the reference, Cu–Co3O4 (0.03 min−1). Notably, the robust reusability of the sample was also established based on three successive runs. The mechanistic study suggested that the influence of the active species derived from PDS followed the below order: 1O2 > HO˙ > O2˙− > SO4˙−. The robust catalytic activity of Cu–ZnO–Co3O4 could be ascribed to the rich oxygen vacancies, small size of active particles and the porous structure.","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 1","pages":" 102-110"},"PeriodicalIF":2.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826018","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

Chiral-driven formation of hybrid cyanurates with large birefringence† 手性驱动形成具有大双折射†的杂合氰尿酸盐

IF 2.6 3区化学

CrystEngComm Pub Date : 2024-11-20 DOI: 10.1039/D4CE01123F

Yue Zhao, Chun-Li Hu, Peng-Fei Chen, Ming-Zhi Zhang and Jiang-Gao Mao

{"title":"Chiral-driven formation of hybrid cyanurates with large birefringence†","authors":"Yue Zhao, Chun-Li Hu, Peng-Fei Chen, Ming-Zhi Zhang and Jiang-Gao Mao","doi":"10.1039/D4CE01123F","DOIUrl":"https://doi.org/10.1039/D4CE01123F","url":null,"abstract":"Ultraviolet (UV) birefringent crystals have important applications in polarizers, optical isolators and optical information processing. Crystals with large birefringence can enhance the modulation ability of light and realize the miniaturization of devices. However, the birefringence of cyanurates is often limited by the large dihedral angles between anionic groups. In this work, a chiral-driven approach is proposed for the first time to construct cyanurates with large birefringence. We combined racemic or chiral α-methylbenzylamine (α-MBA) molecules with a π-conjugated cyanurate group (CY), which led to the isolation of three organic hybrid cyanurates with wide band gaps >5.10 eV, namely, rac-α-MBACY, R-α-MBACY, and S-α-MBACY. Notably, the presence of chirality leads to a significant reduction of the dihedral angle between the α-MBA cation and (H2C3N3O3)− anion and a threefold increase in birefringence from 0.113@546 nm to 0.344@546 nm and 0.338@546 nm. The birefringence values of R-α-MBACY and S-α-MBACY exceed those of most of the cyanurates and commercial crystals, indicating their potential as UV birefringent crystals. This work provides new insights into the design and syntheses of UV birefringent materials.","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 1","pages":" 30-37"},"PeriodicalIF":2.6,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826031","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

Syntheses and properties of two pH-directed types of cobalt–lanthanoid heterometallic complexes constructed from 2,5-dichlorobenzoate and 1,10-phenanthroline†

IF 2.6 3区化学

CrystEngComm Pub Date : 2024-11-19 DOI: 10.1039/D4CE00886C

Yue Shen, Jiu-Zeng Jin, Zhen-Yu Yang, Jie Zhao, Bin-Qiu Liu and Ju-Wen Zhang

{"title":"Syntheses and properties of two pH-directed types of cobalt–lanthanoid heterometallic complexes constructed from 2,5-dichlorobenzoate and 1,10-phenanthroline†","authors":"Yue Shen, Jiu-Zeng Jin, Zhen-Yu Yang, Jie Zhao, Bin-Qiu Liu and Ju-Wen Zhang","doi":"10.1039/D4CE00886C","DOIUrl":"https://doi.org/10.1039/D4CE00886C","url":null,"abstract":"By adjusting the pH values, two types of heterometallic complexes originated from the same raw materials but with different structures and colors have been successfully designed and constructed. Eleven 3d–4f cobalt–lanthanoid heterometallic complexes, [Ln2Co2(2,5-DCB)10(phen)2] [Ln = Nd (1 and 1a), Sm (2 and 2a), Eu (3 and 3a), Gd (4), Tb (5), Dy (6), Er (7), and Yb (8)], were prepared through the self-assembly reactions of Ln(NO3)3·nH2O, Co(NO3)2·6H2O, 2,5-dichlorobenzoic acid (2,5-HDCB), NaOH, and 1,10-phenanthroline (phen) under solvothermal conditions. All of these complexes were characterized by single-crystal X-ray diffraction, FT-IR spectroscopy, powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA) and differential thermal analysis (DTA). Complexes 1 and 1a (2 and 2a, 3 and 3a) are available at different pH ranges, respectively. Their structures and colors are different from each other. Complexes 1–8 and 1a–3a are found to be isostructural, respectively. The photoluminescence properties of 3 and 3a as well as the magnetic properties of 1, 2, 1a, 2a, and 4–8 were investigated. Complexes 3 and 3a display similar characteristic luminescence of Eu(III) and different emission lifetimes. Complex 4 exhibits weak ferromagnetic coupling between the spin carriers below 10 K, and complex 6 shows a slow magnetic relaxation behavior.","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 48","pages":" 6873-6882"},"PeriodicalIF":2.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798117","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

Complexes of N-chloroquinuclidinium with chloride: strong halogen bonding via chlorine atoms†

IF 2.6 3区化学

CrystEngComm Pub Date : 2024-11-19 DOI: 10.1039/D4CE01053A

Maison Hardin, Matthias Zeller and Sergiy V. Rosokha

引用次数: 0

Structural landscape studies of aminopyridinium hypodiphosphates: dehydration and polymorphism in 4-aminopyridinium salts†

IF 2.6 3区化学

CrystEngComm Pub Date : 2024-11-19 DOI: 10.1039/D4CE01048E

Daria Budzikur-Maciąg, Vasyl Kinzhybalo and Katarzyna Ślepokura

{"title":"Structural landscape studies of aminopyridinium hypodiphosphates: dehydration and polymorphism in 4-aminopyridinium salts†","authors":"Daria Budzikur-Maciąg, Vasyl Kinzhybalo and Katarzyna Ślepokura","doi":"10.1039/D4CE01048E","DOIUrl":"https://doi.org/10.1039/D4CE01048E","url":null,"abstract":"A series of 4-aminopyridinium (4ap) hypodiphosphates has been synthesized and characterized by variable temperature (VT) optical microscopy, thermogravimetry (TGA-DSC) and X-ray diffraction techniques (SC-XRD, PXRD, VT μ-PXRD). Anhydrous salts (4apH)(H3P2O6) (2) and (4apH)2(H2P2O6) in monoclinic (C2/c) (4), orthorhombic (P212121) (5) and another monoclinic (Cc) (6) polymorphic modifications were obtained by single crystal-to-powder dehydrations of the hydrates: ionic co-crystal (4apH)2(H2P2O6)·H4P2O6·2H2O (1) and salt (4apH)2(H2P2O6)·2H2O (3), respectively. Compound (2) was the only anhydrous form which was also obtained by a typical solution-crystallization. Destructive dehydrations strongly affected hypodiphosphate substructures, generating new structural motifs (both in PP–PP and ap–PP interactions) and new crystal architectures, thus revealing the structural diversity in organic hypodiphosphates. Dehydration gave rise to new properties, as non-centrosymmetric and polar anhydrous structures, (5) and (6) respectively, were obtained from centrosymmetric hydrate (3).","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 48","pages":" 6861-6872"},"PeriodicalIF":2.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798139","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

On the nature and interplay of Hg⋯O/S spodium bonding and O⋯S chalcogen bonding in one-dimensional phenylmercury(ii) 3-alkoxycyclobutene-1,2-dione-4-thiolate coordination polymers† 一维苯基汞（ii）3-烷氧基环丁烯-1,2-二酮-4-硫醇配位聚合物中 Hg⋯O/S spodium 键和 O⋯S chalcogen 键的性质及其相互作用†。

IF 2.6 3区化学

CrystEngComm Pub Date : 2024-11-19 DOI: 10.1039/D4CE00879K

Aparna Kushwaha, Devyani Srivastava, Gabriele Kociok-Köhn, Sarfaraz Ahmed, Edward R. T. Tiekink and Abhinav Kumar

{"title":"On the nature and interplay of Hg⋯O/S spodium bonding and O⋯S chalcogen bonding in one-dimensional phenylmercury(ii) 3-alkoxycyclobutene-1,2-dione-4-thiolate coordination polymers†","authors":"Aparna Kushwaha, Devyani Srivastava, Gabriele Kociok-Köhn, Sarfaraz Ahmed, Edward R. T. Tiekink and Abhinav Kumar","doi":"10.1039/D4CE00879K","DOIUrl":"https://doi.org/10.1039/D4CE00879K","url":null,"abstract":"Two one-dimensional coordination polymers, PhHg(3-alkoxycyclobutene-1,2-dione-4-thiolate) (alkoxy = OMe and OEt), have been synthesised, characterised spectroscopically, crystallographically and through computational chemistry techniques. Both species exhibit intermolecular Hg⋯O σ-hole spodium bonding as well as intramolecular Hg⋯O π-hole spodium bonding. In the ethoxy species there are complementary σ-hole O⋯S chalcogen bonds to the Hg⋯O σ-hole spodium bonding as well as orthogonal Hg⋯S π-hole spodium bonding. Each of the coordination polymers is connected into a supramolecular layer. For the methoxy derivative, the layer features π(cyclobutene)⋯π(phenyl) stacking and side-on C<img>O⋯π(cyclobutene)/anti-parallel carbonyl⋯carbonyl interactions. For the ethoxy species, Hg⋯S, offset π(cyclobutene)⋯π(cyclobutene) stacking and C<img>O⋯π(cyclobutene) interactions occur within the layer. In each case, weak C–H⋯π interactions operate between the two-dimensional arrays. The nature of the electron transfer responsible for the spodium/chalcogen bonding has been established. In terms of QTAIM energies, those associated with Hg⋯O σ-hole spodium bonds were in the range of 17.5 to 23.3 kJ mol−1, which were less than the energies computed for the intramolecular Hg⋯O π-hole spodium bonds in each case (31.0 to 43.6 kJ mol−1). The lowest energies for the intermolecular Hg⋯O spodium bonding were computed for the ethoxy species, which correlates with the compensating Hg⋯S π-hole spodium bonding (2 × 11.0 kJ mol−1) and O⋯S chalcogen bonding (12.5 kJ mol−1). The electron transfer leading to the Hg⋯O/S spodium bonding involves donation of an oxygen- or sulphur-bound lone pair of electrons to the σ*(Hg–C) orbital, with the intramolecular Hg⋯O spodium bond involving two lone pair interactions. The O⋯S chalcogen bond is assigned to LP(O) → σ*(C–S).","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 1","pages":" 64-80"},"PeriodicalIF":2.6,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826036","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

Correction: Improving the grindability of rice husk-based green silica through pyrolysis process optimization employing the Taguchi method and response surface methodology

IF 2.6 3区化学

CrystEngComm Pub Date : 2024-11-19 DOI: 10.1039/D4CE90125H

Shengwang Yuan, Zichao Ma, Yihao Hou, Shichao Niu, Li Lekai, Xuanting Liu, Shuo Wang, Zihe Xu and Yunhai Ma

引用次数: 0

Direct fluorine- and sulfur-targeted postsynthetic modification in a porous organic polymer-based ammonia adsorbent†

IF 2.6 3区化学

CrystEngComm Pub Date : 2024-11-18 DOI: 10.1039/D4CE01025F

Eunjin Jo, Yeonwoo Park, Suin Jo, Jongsik Park, Seyoung Koo and Dong Won Kang

引用次数: 0

3,5-Dinitro-1-(3,3,3-trifluoropropyl)-1H-pyrazol-4-amine as an insensitive and thermostable energetic melt-castable material† 3,5-二硝基-1-(3,3,3-三氟丙基)-1H-吡唑-4-胺作为一种不敏感且可恒温的高能熔铸材料†。