Crystal Research and Technology最新文献

{"title":"Inorganic–Organic Hybrid Frameworks Constructed From Keggin-Type Polyoxotungstates and Bolaamphiphiles","authors":"Keita Tomimatsu,&nbsp;Daisuke Aiba,&nbsp;Hiroyuki Iimura,&nbsp;Toshiyuki Misawa,&nbsp;Yoshiki Kiyota,&nbsp;Ailing Gao,&nbsp;Sayaka Uchida,&nbsp;Takeru Ito","doi":"10.1002/crat.70136","DOIUrl":"https://doi.org/10.1002/crat.70136","url":null,"abstract":"<p>Inorganic-organic hybrid frameworks have been developed by using Keggin-type polyoxotungstate anions. As cationic partners, primary ammonium surfactants with two hydrophilic heads in one molecule, so-called bolaamphiphiles, have been utilized to construct inorganic-organic hybrid networks of polyoxotungstate. Most polyoxotungstate-bolaamphiphile frameworks possess three-dimensional architectures formed by the short contacts between each polyoxotungstate anion. The spaces in the three-dimensional architectures of polyoxotungstate anions are filled with bolaamphiphile cations and crystallization solvents. Some polyoxotungstate-bolaamphiphile hybrid crystals exhibit chromic property under X-ray irradiation.</p>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 8","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/crat.70136","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148617164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solvation-Driven Modulation of Crystal Packing in Metacetamol: Insights From X-Ray Diffraction, Hirshfeld, and Void Analyses","authors":"Architha Natarajan,&nbsp;Srinivasan Karuppannan","doi":"10.1002/crat.70130","DOIUrl":"https://doi.org/10.1002/crat.70130","url":null,"abstract":"<div>\u0000 \u0000 <p>The crystal structures of metacetamol form I, hemihydrate, and acetone hemisolvate were investigated using single-crystal x-ray diffraction, complemented by Hirshfeld surface, fingerprint, energy framework, and void analyses. Comparative evaluation reveals that structural differences among these forms primarily stem from variations in hydrogen-bonding networks and packing efficiency. Form I exhibits the most compact arrangement, stabilized by O–H···O and N–H···O hydrogen bonds in conjunction with π–π stacking, resulting in a dense and efficient packing motif. In contrast, the hemihydrate highlights the role of lattice water, which establishes an extended hydrogen-bonding framework that disrupts aromatic stacking and enlarges void volume, thereby reducing packing density. The acetone hemisolvate displays the most fragmented and voluminous voids, stabilized predominantly by N–H···O = C and O–H···O = C interactions with solvent molecules. Fingerprint plots confirm the prevalence of H···H contacts, with notable contributions from O···H/H···O interactions. Quantitative void analysis demonstrates a progressive decline in packing efficiency across the series: form I (10.194%) &lt; hemihydrate (12.793%) &lt; acetone hemisolvate (12.983%). Energy framework analysis indicates variations in electrostatic and dispersion interaction contributions across the crystal forms, reflecting differences in intermolecular interaction networks. These results underscore the impact of solvation on intermolecular interactions and crystal packing, offering valuable insights for pharmaceutical solid-state design.</p>\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 7","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148467267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Ca Dopant Modified Structural, Optical, and Temperature Dependent Dielectric Characteristics in Ba1-xCaxMnO3 Ceramics","authors":"Itishree Nayak,&nbsp;Satyajeet Jena,&nbsp;Prachibarsa Panda,&nbsp;Debadhyan Behera,&nbsp;Dilip Kumar Mishra","doi":"10.1002/crat.70133","DOIUrl":"https://doi.org/10.1002/crat.70133","url":null,"abstract":"<div>\u0000 \u0000 <p>The effect of Ca substitution on the structural, optical, and dielectric properties of Ba_1-xCa_xMnO₃ ceramics prepared by solid state reaction technique with sintering temperature 1050°C have been investigated. XRD analysis shows the formation of rhombohedral perovskite structure with space group <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>R</mi>\u0000 <mover>\u0000 <mn>3</mn>\u0000 <mo>¯</mo>\u0000 </mover>\u0000 </mrow>\u0000 <annotation>${mathrm{R}}bar 3$</annotation>\u0000 </semantics></math> m and hexagonal structure. FESEM micrographs revealed the appearance of different grain morphology with the variation of Ca doping concentration with distinct grain and grain boundaries. Higher dielectric constant was observed with Ca doping e.g. it raised from 5596 to 43935 at 10 Hz frequency (300°C) with the increase of Ca doping from 10% to 40%. This increase of dielectric constant with temperature indicates the occurrence of space charge polarization in the materials. Impedance analysis confirmed the NTCR behavior of the samples, whereas depressed semicircles toward real axis (Z^/) of impedance in Nyquist plot shows non-Debye type of relaxation in the prepared ceramics. Impedance analysis also revealed an electrically heterogeneous microstructure consisting of semiconducting grains separated by insulating grain boundaries of material. Optical absorption studies showed the decreasing of bandgap from 2.19 to 2.08 eV with increase of Ca doping concentration. Low bandgap indicates the semiconducting nature of the grains in the prepared samples.</p>\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 7","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148467276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tuning of Photoluminescence in SrCeO3 Perovskites Through Doping of Mn Ions to Achieve Suitable Emission: Plant Growth Lighting Application","authors":"Vijay kumar T. G.,&nbsp;K. Munirathnam,&nbsp;V. Vadhana Sharon,&nbsp;Ashok Reddy G. V.,&nbsp;Kilari Naveen Kumar,&nbsp;V. Manjunath","doi":"10.1002/crat.70129","DOIUrl":"https://doi.org/10.1002/crat.70129","url":null,"abstract":"<div>\u0000 \u0000 <p>In recent decades, the importance of solid-state lighting for plant growth is known as plant growth LEDs (PLEDs), which is increasingly vital for enhancing indoor crop yields and plant decoration under unfavorable climatic conditions. The easiest way of designing PLEDs takes place by coating red emission phosphor materials on UV/Blue light source chips. Hence, in this present research, the work is focused on the perovskite SrCe₁₋<i><span>x</span></i>O₃:<i>x</i>Mn (<i>x</i> = 0, 1–7 mol%) phosphors that have red emission, which were synthesized via sol–gel route and reported for PLED applications. The purity of materials was analyzed by x-ray diffractometer (XRD), and confirmed that the crystalline phase is the same even after the substitution of dopants in host materials. The surface morphological graphs were captured and found to be agglomerated. The oxidation state of the dopant was studied, and the coexistence of Mn³⁺/Mn⁴⁺ and Ce³⁺/Ce⁴⁺ ions in the host was found. Due to the presence of different oxidation states, phosphors could exhibit various emissions. From the optical properties of SrCe₁₋<i>_x</i>O₃:<i>x</i>Mn (<i>x</i> = 0, 1–7mol%) phosphors were systematically examined, and the pristine SrCeO₃ perovskite has shown white emission, whereas SrCe₁₋<i>_x</i>O₃:<i>x</i>Mn (<i>x</i> = 5 mol%) phosphor has shown red emission under 376 nm excitation. The chromaticity coordinates (CIE) of pristine and Mn-doped samples were evaluated and found to be ( 0.281,0.229) for pristine, which is in the nearblue light emission, and for SrCe₁₋<i>_x</i>O₃:<i>x</i>Mn (<i>x</i> = 5 mol%), shifted to (0.388, 0.335) coordinates owing to red emission by doped Mn ions, underscoring their potential as efficient phosphors for PLEDs.</p>\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 7","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cocrystallization and Micronization as Strategies to Optimize the Bioavailability of Naringin and Naringenin Molecules: A Comprehensive Review of In Vivo and In Vitro Pharmaceutical Applications","authors":"Emilia Rodrigues Almeida,&nbsp;Kanandra Taisa Bertoncello,&nbsp;Ketelin Zamin Kuhn,&nbsp;Liz Girardi Müller,&nbsp;J. Vladimir Oliveira","doi":"10.1002/crat.70126","DOIUrl":"https://doi.org/10.1002/crat.70126","url":null,"abstract":"<p>Naringin, a flavonoid found in citrus fruits, is rapidly metabolized into naringenin through enzymatic action, originating metabolites with therapeutic potential. However, the low solubility and bioavailability of these compounds limit their application. Micronization is used to increase the particle surface area, enhancing dissolution, absorption, and bioavailability. Co-crystallization modulates the physicochemical properties of compounds without altering their molecular integrity. Co-crystals can be obtained through mechanical methods or crystallization, involving the organization of molecules into a stable crystalline network through intermolecular interactions. Co-crystallization provides advantages over micronization, including encapsulation, functionalization, and modulation of the release profile of bioactive compounds. However, the pharmacotechnical performance of co-crystals depends on the selection of the co-former. In co-crystals containing naringenin as co-former and marketed drugs as active pharmaceutical ingredient, reduced bioavailability and lower dissolution rates of the target molecule were observed, results that should be interpreted according to the proposed therapeutic and pharmacokinetic objectives. This literature review suggests that the integration of micronization and co-crystallization represents a promising strategy to enhance the pharmacological properties of naringin and naringenin. The advancement of physicochemical modification techniques could expand the biomedical applications of these flavonoids, favoring the development of therapeutic approaches contributing to better clinical outcomes.</p>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 7","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/crat.70126","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring the Structural and Optical Properties of Ce-Doped ZnO Nanostructures for Potential Electron Transport Layer Application in Perovskite Solar Cells","authors":"P. J Mokgolo,&nbsp;T. D Malevu","doi":"10.1002/crat.70119","DOIUrl":"https://doi.org/10.1002/crat.70119","url":null,"abstract":"<p>This study investigates the structural, morphological, and optical modifications induced by cerium (Ce) doping in zinc oxide (ZnO) nanostructures synthesized by a controlled hydrothermal method. X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM/TEM), Fourier-transform infrared spectroscopy (FTIR), Ultraviolet-Visible spectroscopy (UV–vis), and photoluminescence (PL) spectroscopy were used for characterization. XRD confirmed that all samples retained the hexagonal wurtzite structure after Ce incorporation. The crystallite size varied between 32.6 and 49.5 nm, showing a non-monotonic dependence on cerium (Ce) concentration. SEM and TEM revealed a gradual morphological transformation from interlinked hexagonal particles to spherical structures with increasing Ce content. Optical analysis showed slight bandgap variation from 3.209 to 3.226 eV, indicating modification of the ZnO electronic structure. Photoluminescence spectra exhibited enhanced visible emission in the 650–700 nm region with increasing Ce concentration, attributed to defect-mediated radiative recombination associated with Ce³⁺/Ce⁴⁺ states. These findings demonstrate that controlled Ce doping effectively tailors the structural and optical properties of Zinc oxide (ZnO), 16 through defect engineering. The resulting Ce-doped ZnO nanostructures show potential for applications requiring tunable charge transport and light-management properties in optoelectronic materials.</p>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 7","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/crat.70119","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microwave Synthesis: Zinc Tungstate Nanoparticles as an Efficient Electrocatalyst for the Methanol Oxidation Reaction","authors":"T. V. M Sreekanth,&nbsp;Taeyong Shin,&nbsp;J. Kim,&nbsp;K. Yoo","doi":"10.1002/crat.70123","DOIUrl":"https://doi.org/10.1002/crat.70123","url":null,"abstract":"<div>\u0000 \u0000 <p>In this study, zinc tungstate nanoparticles (ZW NPS) were synthesized by a simple, rapid microwave synthesis method. The as-synthesized ZW NPS were characterized by XRD, XPS, SEM, and TEM analysis. The results show the presence of a nanorod morphology, and the average crystalline size was found to be ∼32 nm. The ZW NPs were used as electrocatalysts for the electrooxidation of the methanol reaction (MOR) in an alkaline medium. The ZW NPS exhibited excellent MOR activity and stability over 4000 s.</p>\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 7","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Grain Size and Temperature on the Tensile Properties of Nanocrystalline Fe–Mn Alloy","authors":"Xuefeng Lu,&nbsp;Xingang Shi,&nbsp;Junsheng Zhang,&nbsp;Zhijian Zhang,&nbsp;Junqiang Ren,&nbsp;Xingchang Tang,&nbsp;Xin Guo","doi":"10.1002/crat.70125","DOIUrl":"https://doi.org/10.1002/crat.70125","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigates the effects of grain size and temperature on the tensile properties and deformation mechanisms of a body-centered cubic nanocrystalline Fe-Mn alloy using molecular dynamics simulations. Results indicate that Young's modulus increases with grain size, while the dominant deformation mechanism transitions from grain boundary (GB) migration to dislocation glide and stacking fault formation. The alloy exhibits Hall-Petch and inverse Hall-Petch behaviors with a critical grain size of ∼16.21 nm, which triggers large-scale intragranular twinning. Elevated temperatures reduce peak stress and Young's modulus by widening GBs and suppressing dislocation formation in favor of GB-mediated deformation. Furthermore, macroscopic tensile experiments on Q345R steel validate the simulated macro-mechanical responses and grain-refinement strengthening within the Hall-Petch regime. These findings provide a theoretical basis for the strengthening-toughening mechanisms and temperature-dependent design of nanocrystalline alloys.</p>\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 7","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Issue Information: Crystal Research and Technology 7'2026","authors":"","doi":"10.1002/crat.70131","DOIUrl":"https://doi.org/10.1002/crat.70131","url":null,"abstract":"","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 7","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/crat.70131","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of Conductivity Relaxation and Nonlinear Optical Activity in Pure and Cu2+ Doped Lithium Sulphate Monohydrate Crystals","authors":"A. Annalakshmi,&nbsp;K. Balasubramanian,&nbsp;S. C. Vella Durai","doi":"10.1002/crat.70127","DOIUrl":"https://doi.org/10.1002/crat.70127","url":null,"abstract":"<div>\u0000 \u0000 <p>Single crystals of pure and 0.5 mol% Cu²⁺ substituted lithium sulphate monohydrate (LSMH) were grown by slow evaporation. The novelty of this work lies in establishing a defect-assisted conduction model correlating Cu²⁺ substitution, lithium vacancy formation, impedance relaxation, surface morphology, nonlinear optical efficiency, and laser damage resistance. Structural substitution is inferred from ionic size compatibility and systematic electrical response modification. Complex impedance spectroscopy (323–353 K, 20 Hz–2 MHz) reveals bulk-dominated conduction exhibiting non-Debye relaxation. The data were fitted using an equivalent circuit model consisting of Rb–CPE elements, and fitting parameters are reported. AC conductivity follows Jonscher's power law, confirming thermally activated hopping via vacancy defects. A defect chemistry model based on Cu² substitution at Li⁺ sites is proposed to explain conductivity changes. AFM reveals increased roughness upon doping. Second harmonic generation (SHG) was confirmed using the Kurtz–Perry method, and laser damage threshold (LDT) values (∼3 GW/cm²) indicate high optical stability. The combined electrical–defect–optical correlation establishes Cu²⁺ substituted LSMH as a promising multifunctional photonic material.</p>\u0000 </div>","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"61 7","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}