CrystEngComm最新文献

{"title":"Multimode crawling motions of azobenzene crystal induced by light intensities for application as a shape-changeable microcleaner†","authors":"Makoto Saikawa, Kengo Manabe, Koichiro Saito, Yoshihiro Kikkawa and Yasuo Norikane","doi":"10.1039/D4CE00827H","DOIUrl":"https://doi.org/10.1039/D4CE00827H","url":null,"abstract":"<p >Crystals of <em>trans</em>-3,3′-dimethylazobenzene (DMAB) exhibit crawling motion on solid surface upon simultaneous exposure to ultraviolet (UV) and visible light from opposite directions. In this study, the shape and velocity during the photoinduced crawling motion of DMAB crystals are successfully controlled by irradiation light intensities. A higher intensity of the visible light than the UV light causes the crystals to be spread shape and move slower (∼1 μm min<small>⁻¹</small>). In contrast, a stronger UV light allows them to be droplet-like shape and move faster (∼4 μm min<small>⁻¹</small>). The shape and velocity can be varied by adjusting the light intensities. Shape transformation is effectively applied to cargo capture–carry–release tasks. In particular, spread-shaped crystals capture silica particles over a wide area, whereas droplet-like crystals gather and transport them. This result suggests that a multifunctional soft transporter composed of a single component does not require complex fabrication, thereby contributing to the fields of soft robotics and microfluidics.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 44","pages":" 6274-6281"},"PeriodicalIF":2.6,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598754","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}

{"title":"Unravelling the hierarchical structure of saturated monoacid triglycerides during crystallization – a comprehensive time-resolved X-ray scattering study†","authors":"Ivana A. Penagos, Fien De Witte, Tom Rimaux, Koen Dewettinck and Filip Van Bockstaele","doi":"10.1039/D4CE00800F","DOIUrl":"https://doi.org/10.1039/D4CE00800F","url":null,"abstract":"<p >Time-resolved studies are crucial for capturing the dynamic evolution of triglyceride structures during crystallization, providing insights into the self-assembly of diverse triglyceride structures across various length scales. While previous research has characterized triglyceride's polymorphisms and long spacings using wide-angle and small-angle X-ray techniques, time-resolved studies on the mesoscale of triglycerides have been limited, particularly in the study of crystalline nanoplatelets (CNPs) and their aggregates. This study pioneers the application of ultra-small-angle X-ray scattering (USAXS) for time-resolved analysis of commercial sources of saturated monoacid triglycerides. The methodology presented here integrates real-time synchrotron X-ray scattering (XRS) with differential scanning calorimetry (DSC), phase contrast microscopy (PCM), and cryo-scanning electron microscopy (Cryo-SEM) to investigate the crystallization behavior of a 30% dilution of palm stearin (PS) in high oleic sunflower oil (HOSO) and a 30% dilution of fully hydrogenated rapeseed oil (FHRO) in HOSO. Covering several orders of magnitude, this comprehensive multiscale approach enhances our kinetic understanding of triglyceride structural transformations. Both systems followed a polymorphic transition from α to β, with a transition from 2L(α) to 2L(β) lamellar stacking configuration. Our results suggest that structural evolutions in non-pure triglyceride systems advance gradually over extended timescales post-crystallization. While lamellae and CNP thicknesses decreased with the polymorphic transition, CNP size and aggregation changed in four distinct phases. We believe that the methodology presented here will greatly improve our understanding of the self-assembly of lipids, getting us closer to bottom-up optimization of triglyceride-based formulations in food.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 43","pages":" 6143-6154"},"PeriodicalIF":2.6,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ce/d4ce00800f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579284","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}

{"title":"Organic–inorganic hybrid Co-containing polyoxotungstate as an oxygen evolution catalyst†","authors":"Zhe-Hong Chen, Xiao-Yue Zhang, Da-Huan Li, Xin-Xiong Li, Yan-Qiong Sun, Cai Sun and Shou-Tian Zheng","doi":"10.1039/D4CE00873A","DOIUrl":"https://doi.org/10.1039/D4CE00873A","url":null,"abstract":"<p >Herein, cobalt is incorporated into a polyoxotungstate (POW) to obtain a new organic–inorganic hybrid Co-containing POW with a reliable 1D nanowire structure. The Co-containing POW exhibits superior oxygen evolution reaction (OER) activity in a neutral medium compared with its isomorphic Zn-containing POW, highlighting the critical role of cobalt in enhancing OER performance. This work provides a new insight into the structure–property relationship of metal oxides in electrocatalysis.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 41","pages":" 5840-5844"},"PeriodicalIF":2.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452817","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}

{"title":"Urothermal synthesis of metal–organic frameworks","authors":"Michaël Teixeira and Stéphane A. Baudron","doi":"10.1039/D4CE00859F","DOIUrl":"https://doi.org/10.1039/D4CE00859F","url":null,"abstract":"<p >While ionothermal synthesis using deep eutectic solvents based on the combination of choline chloride and urea derivatives has been widely explored for metal–organic framework (MOF) synthesis, the alternative approach consisting in using urea derivatives on their own as solvents, albeit promising, remains comparatively underemployed. This highlight article aims to review the field of urothermal synthesis, covering the state of the art of this approach and its potential development. The use of e-urea (2-imidazolidinone, ethyleneurea), the most extensively employed species in this context, is detailed, showing its ability to play diverse roles in MOF construction. Beyond its role as solvent and soft regulator of solution acidity, it can be present in the pore or as a ligand, most commonly in a bridging mode with divalent metal cations <em>via</em> coordination of the carbonyl group assisted by hydrogen bonding of the NH moieties, or yield ethylenediamine as a decomposition product incorporated in the MOF. Furthermore, urothermal synthesis has demonstrated potential for the preparation of chiral architectures and their enantio-enrichment. Alternatives to e-urea in pure form or as a hemihydrate are also presented. The combination of e-urea with other organic solvents or the use of co-ligands have been shown to modulate its tendency to act as a bridging ligand, while fully <em>N</em>-alkylated urea derivatives represent appealing solvents. They have low melting point or can even be liquid at room temperature, making them media of choice, prone to ligation to the metal center in a terminal fashion given the absence of hydrogen bonding donor, favoring removal towards activation. The structures of the materials reported under urothermal conditions are described as well as their properties and applications.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 42","pages":" 5978-5990"},"PeriodicalIF":2.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ce/d4ce00859f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524301","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}

{"title":"Three peroxomorphic H2O2 adducts of antibiotic furacin: the first cases of 2D hydrogen-bonded peroxide layers and concerted flip-flop hydrogen disorder of peroxide species†","authors":"Andrei V. Churakov","doi":"10.1039/D4CE00822G","DOIUrl":"https://doi.org/10.1039/D4CE00822G","url":null,"abstract":"<p >Crystallization of the antimicrobial compound furacin (nitrofurazone) from 96%, 50%, and 20% hydrogen peroxide (HP) led to three novel solvates C<small>₆</small>H<small>₆</small>N<small>₄</small>O<small>₄</small>·H<small>₂</small>O<small>₂</small>, C<small>₆</small>H<small>₆</small>N<small>₄</small>O<small>₄</small>·1.5(H<small>₂</small>O<small>₂</small>), and C<small>₆</small>H<small>₆</small>N<small>₄</small>O<small>₄</small>·3.5(H<small>₂</small>O<small>₂</small>), respectively. Surprisingly, solvatomorphs that were richer in hydrogen peroxide were obtained from more dilute H<small>₂</small>O<small>₂</small> solutions. The stability of the compounds decreased with an increase in peroxide content. These compounds represent a rare example of solvatomorphism (peroxomorphism) among crystalline hydrogen peroxide adducts. The structures of all the adducts were determined using X-ray crystallography. All of them contain a 1 : 1 chelating supramolecular synthon with a strong and unusual bifurcated donor hydrogen bond HOOH⋯(O<small>₂</small>N, furane). Compound C<small>₆</small>H<small>₆</small>N<small>₄</small>O<small>₄</small>·3.5(H<small>₂</small>O<small>₂</small>) is the first example of a structure containing 2D hydrogen-bonded layers built exclusively from peroxide molecules. In its crystal, a concerted flip-flop proton disorder of HP molecules was observed for the first time.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 42","pages":" 5996-6002"},"PeriodicalIF":2.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524303","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}

{"title":"Self-powered solar-blind photodetectors based on AlN/a-Ga2O3 heterojunctions with a nanocolumnar structure on various substrates","authors":"Zhao Liu, Zelong Fan, Wenliang Li, Yuan Cao, Feihong Zhang, Zuoyan Qin, Zhenhua Sun, Baikui Li and Honglei Wu","doi":"10.1039/D4CE00826J","DOIUrl":"https://doi.org/10.1039/D4CE00826J","url":null,"abstract":"<p >AlN/amorphous Ga<small>₂</small>O<small>₃</small> heterojunction photodetectors were fabricated to achieve solar-blind UV detection. The responsivity and detectivity of the photodetector on a native substrate are 150% and 21.8% higher than those on a heterogeneous substrate at a 20 V bias, reaching 8.31 A W<small>⁻¹</small> and 3.24 × 10<small>¹⁴</small> Jones, respectively. The built-in electric field enables self-powered UV detection without an external power supply. The addition of a nanocolumnar AlN structure significantly improved the performance of the photodetector, achieving a photo-to-dark current ratio and responsivity up to 2.11 × 10<small>⁷</small> and 9.17 mA W<small>⁻¹</small> at 0 V bias. The fabricated photodetector has demonstrated self-powered and high-sensitivity UV detection.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 42","pages":" 6017-6024"},"PeriodicalIF":2.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142524287","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}

{"title":"Europium doping promoted intermolecular charge transfer in UiO-67-CDC for ultrasensitive turn-on colorimetric detection of an anthrax biomarker†","authors":"Ming-Cheng Liu, Jia-Qi Du, Qian Sun and En-qing Gao","doi":"10.1039/D4CE00940A","DOIUrl":"https://doi.org/10.1039/D4CE00940A","url":null,"abstract":"<p >A post-synthetic modification was employed to incorporate lanthanide Eu<small>³⁺</small> ions into carbazole-functionalized UiO-67 metal–organic frameworks, successfully fabricating an efficient dual-emission fluorescence probe. The Eu<small>³⁺</small>-doped composite manifests superior luminescent properties and remarkable fluorescence stability, attributable to the sensitization and reinforcement afforded by the parent framework. Notably, the ligand's capability to capture external light and sensitize Eu<small>³⁺</small> emissions led to observing characteristic peaks at 435 nm for the intrinsic ligand and 591, 614, 651, and 701 nm for Eu<small>³⁺</small>. The introduction of dipicolinic acid (DPA) serves a dual role: it acts as an antenna to absorb photons and replaces the coordinated water molecules of Eu<small>³⁺</small>, thereby preventing fluorescence quenching by water's O–H vibrations. Additionally, establishing hydrogen bonding between DPA and the carbazole dicarboxylic acid (CDC) initiates an intermolecular charge transfer (ICT) process, enhancing the ligand's fluorescence. Besides, the addition of DPA concurrently enhances the fluorescence emissions of both the ligand and Eu<small>³⁺</small>, displaying an unusual dual-enhanced “turn-on” fluorescence mode with an impressively low detection limit of 0.538 μM, accompanied by discernible color changes visible to the naked eye. Utilizing Eu@UiO-67-CDC as a test paper facilitates rapid on-site detection of DPA, eliminating the need for complex instrumentation. Moreover, the Eu@UiO-67-CDC probe can quantify DPA in environmental matrices such as river and lake water, with better recovery rates, indicating its significant potential for practical applications.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 41","pages":" 5859-5866"},"PeriodicalIF":2.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452820","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}

{"title":"NiO modified tubular g-C3N4 on carbon cloth for efficient degradation of rhodamine B","authors":"Menghan Yang, Xuefei Li, Rui Zhao, Yue Wang, Na Liu, Yan Liu and Jinghai Yang","doi":"10.1039/D4CE00342J","DOIUrl":"https://doi.org/10.1039/D4CE00342J","url":null,"abstract":"<p >A novel photocatalyst for the construction of tubular graphitic carbon nitride (g-C<small>₃</small>N<small>₄</small>)/nickel oxide (NiO) heterojunction on carbon cloth (CC) is reported. Using ZnO nanorods as sacrificial template, tubular g-C<small>₃</small>N<small>₄</small> nanosheets with thickness of 20 nm were grown on carbon cloth by thermal condensation. Then, NiO nanosheets were grown on g-C<small>₃</small>N<small>₄</small> tubes by electrodeposition and calcination. In the light of visible light, the removal rates of rhodamine B (RhB) by g-C<small>₃</small>N<small>₄</small>/NiO/CC and g-C<small>₃</small>N<small>₄</small>/CC photocatalysts were 98% and 32%, respectively, within 60 min. The experiment was repeated five times, we found no significant decrease in photocatalyst activity. CC supported photocatalysts have broad application prospects in the degradation of organic dyes.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 41","pages":" 5867-5876"},"PeriodicalIF":2.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142452821","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}

{"title":"Dinuclear lanthanide molecular magnetic materials bridged by tetrazine derivatives containing N6 and N8 atom sites display slow magnetic relaxation behavior†","authors":"Ji-Tun Chen, Rui Guo, Yi-Quan Zhang and Wen-Bin Sun","doi":"10.1039/D4CE00748D","DOIUrl":"https://doi.org/10.1039/D4CE00748D","url":null,"abstract":"<p >Three dinuclear dysprosium complexes <strong>1–3</strong> with structural formulas [Dy<small>₂</small>(bptz)(tta)<small>₆</small>]·2CH<small>₂</small>Cl<small>₂</small> (<strong>1</strong>), [Dy<small>₂</small>(H<small>₂</small>bmtz)(tta)<small>₆</small>] (<strong>2</strong>) and [Dy<small>₂</small>(H<small>₂</small>bmtz)(hfac)<small>₆</small>(H<small>₂</small>O)<small>₂</small>] (<strong>3</strong>) (bptz = 3,6-di(2-pyridyl)-1,2,4,5-tetrazine, H<small>₂</small>bmtz = 3,6-di(2-pyrimidyl)-1,4-dihydro-1,2,4,5-tetrazine, tta = 2-thenoyltrifluoroacetonate, hfac = hexafluoroacetylacetonate) were synthesized by the use of two tetrazine derivative ligands containing six and eight nitrogen atoms in combination with β-diketonate co-ligands, which are a good research platform to study the synergistic influence of the local coordination environment and magnetic interaction on magnetic relaxation. Complexes <strong>1</strong> and <strong>2</strong> possess the same peripheral co-ligands and nearly the same coordination environment (approaching an ideal triangular dodecahedron), but different multi-nitrogen bridges involving N6 (bptz) and N8 (H<small>₂</small>bmtz) tetrazine derivatives. The structural difference leads to distinct magnetic relaxation properties with a hysteresis temperature of 2.5 K and 5.5 K at a rate of 200 Oe s<small>⁻¹</small> in <strong>1</strong> and <strong>2</strong>, respectively, which is most likely due to the different magnetic coupling transmitted by H<small>₂</small>bmtz and bptz in the direction close to the vertical magneto axis. Combined with a suitable local coordination environment, the energy barrier of complex <strong>2</strong> bridged by H<small>₂</small>bmtz can reach three times that of complex <strong>3</strong>. Considering the local ligand field, the important influence of this multi-nitrogen bridge transmitting magnetic coupling on the SMM properties is demonstrated with the aid of <em>ab initio</em> calculations. Also of note is that complexes <strong>2</strong> and <strong>3</strong> are the first reported lanthanide SMMs constructed from dihydro-tetrazine.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 43","pages":" 6184-6193"},"PeriodicalIF":2.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579287","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}

{"title":"Expression of concern: Designing novel morphologies of l-cysteine surface capped 2D covellite (CuS) nanoplates to study the effect of CuS morphologies on dye degradation rate under visible light","authors":"Shahid Iqbal, Ali Bahadur, Shoaib Anwer, Muhammad Shoaib, Guocong Liu, Hao Li, Muhammad Raheel, Mohsin Javed and Bilal Khalid","doi":"10.1039/D4CE90121E","DOIUrl":"https://doi.org/10.1039/D4CE90121E","url":null,"abstract":"<p >Expression of concern for ‘Designing novel morphologies of <small>L</small>-cysteine surface capped 2D covellite (CuS) nanoplates to study the effect of CuS morphologies on dye degradation rate under visible light’ by Shahid Iqbal <em>et al.</em>, <em>CrystEngComm</em>, 2020, <strong>22</strong>, 4162–4173, https://doi.org/10.1039/D0CE00421A.</p>","PeriodicalId":70,"journal":{"name":"CrystEngComm","volume":" 39","pages":" 5664-5664"},"PeriodicalIF":2.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ce/d4ce90121e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142397549","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}