Dalton Transactions最新文献_第7页

Formation of a new hydrated sodium–thorium phosphate from thorium dioxide and its subsequent phase evolution 由二氧化钍生成新的水合磷酸钍钠及其随后的相演化

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-14 DOI: 10.1039/d5dt00276a

Boris V. Kramar, Tatiana V. Plakhova, Anastasiia S. Kuzenkova, Alexander L. Trigub, Roman D. Svetogorov, Andrey A. Shiryaev, Iurii M. Nevolin, Alexey D. Yapryntsev, Alexander E. Baranchikov, Georgy S. Peters, Vasily O. Yapaskurt, Alexander V. Egorov, Ilya A. Kostyukov, Maria D. Shaulskaya, Dmitry M. Tsymbarenko, Anna Yu. Romanchuk, Stepan N. Kalmykov

{"title":"Formation of a new hydrated sodium–thorium phosphate from thorium dioxide and its subsequent phase evolution","authors":"Boris V. Kramar, Tatiana V. Plakhova, Anastasiia S. Kuzenkova, Alexander L. Trigub, Roman D. Svetogorov, Andrey A. Shiryaev, Iurii M. Nevolin, Alexey D. Yapryntsev, Alexander E. Baranchikov, Georgy S. Peters, Vasily O. Yapaskurt, Alexander V. Egorov, Ilya A. Kostyukov, Maria D. Shaulskaya, Dmitry M. Tsymbarenko, Anna Yu. Romanchuk, Stepan N. Kalmykov","doi":"10.1039/d5dt00276a","DOIUrl":"https://doi.org/10.1039/d5dt00276a","url":null,"abstract":"This study investigated the behaviour of nanoscale thorium dioxide in a sodium phosphate buffer under hydrothermal conditions under conditions ranging from weakly acidic (pH ∼ 5) to weakly basic (pH ∼ 8). The hydrothermal syntheses yielded a nanosized hydrated double sodium–thorium phosphate phase. The acidity of the medium affected particle size and elemental composition of the product. The phase, identified in all cases as a hydrated variant of the known sodium–thorium phosphate NaTh2(PO4)3, possesses a framework structure and is able to accommodate water and sodium cations within the channels; notably, the sodium content varied based on the acidity of the synthesis medium. Calcination of the nanosized phase in air produced mixtures of two distinct crystalline sodium–thorium phosphates, NaTh2(PO4)3 and Na2Th(PO4)2, in different ratios. The final product composition was determined by the pH used during synthesis and the related phosphate content of the nanosized phase. Characterization of the materials before and after calcination was carried out with a range of complementary methods: X-ray diffraction, small-angle X-ray scattering, electron microscopy, X-ray absorption spectroscopy, total X-ray scattering with pair distribution function analysis, infrared spectroscopy and 31P MAS NMR.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"25 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143827491","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

Structural, optical, and magnetic behavior and the nucleation of a Griffiths-like phase in (Ca,V)-doped ZnO nanoparticles （Ca，V）掺杂ZnO纳米颗粒的结构、光学和磁性行为及类griffiths相的成核

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-14 DOI: 10.1039/d5dt00096c

S. Mrabet, N. Ihzaz, M. N. Bessadok, C. Vázquez-Vázquez, M. Alshammari, O. M. Lemine, D. Ananias, L. El Mir

{"title":"Structural, optical, and magnetic behavior and the nucleation of a Griffiths-like phase in (Ca,V)-doped ZnO nanoparticles","authors":"S. Mrabet, N. Ihzaz, M. N. Bessadok, C. Vázquez-Vázquez, M. Alshammari, O. M. Lemine, D. Ananias, L. El Mir","doi":"10.1039/d5dt00096c","DOIUrl":"https://doi.org/10.1039/d5dt00096c","url":null,"abstract":"Single-phase (Ca,V) co-doped ZnO nanoparticles (Zn0.93Ca0.04V0.03O, called hereinafter ZCVO) were synthesized via a modified sol–gel method. The hexagonal wurtzite symmetry of the ZnO phase nanostructure, belonging to the P63mc space group, has been confirmed through X-ray diffraction examinations using Rietveld refinement. No segregated secondary phases or Ca or/and V-rich clusters were detected. The TEM images clearly show the presence of nanoparticles exhibiting a diverse range of spherical shapes. The effect of co-doping on the optical band gap and crystalline quality was also investigated via photoluminescence (PL), UV–vis, and Raman spectrometers. The M–T curve suggests a tenability of magnetic coupling which was discussed within the context of three competing magnetic phases using the 3D spin wave model and Curie–Weiss law. The lack of saturation of the M–H loop at 10 K suggests the presence of both paramagnetic (PM) and ferromagnetic (FM) phases in ZCVO NPs. The bound magnetic polaron (BMP) model provides a plausible explanation for the observed magnetic phase transition. Moreover, a Griffiths-like phase was observed for the first time, to our knowledge, in co-doped ZnO nanoparticles. This novelty may stem from the interplay between the antiferromagnetic (AFM) and FM interactions of the Ca and V ions, which are acquired by oxygen deficiency.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"6 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143827493","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

Heterostructure and atomic doping engineering in 3D Co2CrO4@Cr-NiFe LDH/CF nanosheet arrays for efficient electrocatalytic oxygen evolution 三维Co2CrO4@Cr-NiFe LDH/CF纳米片阵列的异质结构和原子掺杂工程用于高效电催化析氧

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-14 DOI: 10.1039/d5dt00351b

Xinyue Yao, Qiangqiang Wang, Xuejing Liu, Xuan Kuang, Xu Sun, Xiang Ren, Dan Wu, Qin Wei

{"title":"Heterostructure and atomic doping engineering in 3D Co2CrO4@Cr-NiFe LDH/CF nanosheet arrays for efficient electrocatalytic oxygen evolution","authors":"Xinyue Yao, Qiangqiang Wang, Xuejing Liu, Xuan Kuang, Xu Sun, Xiang Ren, Dan Wu, Qin Wei","doi":"10.1039/d5dt00351b","DOIUrl":"https://doi.org/10.1039/d5dt00351b","url":null,"abstract":"The oxygen evolution reaction (OER) is usually considered a major obstacle to electrochemical water splitting, primarily because of its sluggish kinetics. Developing an effective and durable catalyst for the OER is indispensable for overcoming this challenge. In this study, a three-dimensional nanomaterial with a unique heterostructure (Co2CrO4@Cr-NiFe LDH/CF) was obtained by the deposition of Cr-doped double hydroxide (Cr-NiFe LDH) on Co2CrO4 nanosheet arrays grown on copper foam (Co2CrO4/CF). In particular, the catalyst had a current density of 100 mA cm−2 at a low overpotential of just 257 mV, a high turnover frequency (TOF) of 10.21 s−1 at an overpotential of 300 mV and a Tafel slope of merely 72 mV dec−1. This indicated that Co2CrO4@Cr-NiFe LDH/CF exhibited outstanding catalytic efficiency. Moreover, the catalyst exhibited stability for a duration of 40 h at a current density of 100 mA cm−2. The study introduces an innovative approach for the superior design of an OER catalyst and offers a significant reference for investigation within the realm of renewable energy.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"11 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143827487","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

Chirality in metal-based antimicrobial agents: a growing frontier in biomedical research 金属基抗菌剂的手性：生物医学研究的一个不断发展的前沿

IF 3.5 3区化学

Dalton Transactions Pub Date : 2025-04-14 DOI: 10.1039/D5DT00400D

Francisco Montilla, Carlos J. Carrasco and Agustín Galindo

引用次数: 0

Alkali Metal/Mercury Dual-Metal Sulfides as Infrared Nonlinear Optical Materials with High Laser-induced Damage Thresholds 碱金属/汞双金属硫化物作为高激光损伤阈值的红外非线性光学材料

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-14 DOI: 10.1039/d5dt00180c

Guili Wang, Bohui Xu, Chunxiao Li, Pifu Gong, Zheshuai Lin, Jiyong Yao

引用次数: 0

Facile synthesis of mesoporous rhodium nanoparticles with exposed {100} facets for enhanced C−H oxidations 暴露{100}面的介孔铑纳米颗粒的快速合成增强了C−H氧化

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-14 DOI: 10.1039/d5dt00278h

Yuqi Jia, Xueqin Cui, Houbing Zou, Xili Tong

引用次数: 0

Ferrocene Units Substitution in Nickel(II) Porphyrin(2.1.2.1) Induce Extremely Low Oxygen Evolution Reaction Overpotential 二茂铁取代镍（II）卟啉（2.1.2.1）诱导极低析氧反应过电位

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-14 DOI: 10.1039/d5dt00580a

Tao Jiang, Yiping Hu, Sihan Liang, Fengxian Qiu, Hongliang Huang, Mingbo Zhou, Songlin Xue

引用次数: 0

Photoswitchable WO₃₋ₓ QDs/Cu NCs Composite Films for Efficient UV Detection and Dual-Mode Anticounterfeiting 用于高效紫外检测和双模防伪的可光开关WO₃￣ₓQDs/Cu NCs复合薄膜

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-14 DOI: 10.1039/d5dt00440c

Qingmiao Mu, Jia Li, Hongxi Gu, Lijun Ren, Juan Du, Hualei Cheng, Dengwei Hu

{"title":"Photoswitchable WO₃₋ₓ QDs/Cu NCs Composite Films for Efficient UV Detection and Dual-Mode Anticounterfeiting","authors":"Qingmiao Mu, Jia Li, Hongxi Gu, Lijun Ren, Juan Du, Hualei Cheng, Dengwei Hu","doi":"10.1039/d5dt00440c","DOIUrl":"https://doi.org/10.1039/d5dt00440c","url":null,"abstract":"Photoswitchable fluorescent materials (PFMs) have attracted considerable attention due to the intrinsic advantages of non-contact operation, cleanliness, and non-invasiveness. Conventional PFMs always require complicated preparation processes with poor fluorescence switching properties, which are affected by the mechanisms of Föster resonance energy transfer (FRET) or photoinduced electron transfer (PET). The WO3-x QDs/Cu NCs composite films are prepared on different substrates by a solution casting method and displays outstanding fluorescence switching properties owing to the super photochromic performance of WO3-x QDs and aggregation-induced fluorescence of Cu NCs. The composite film exhibits reversible on/off switchable fluorescence under UV light irradiation and heat treatment based on the inner filter effect (IFE) mechanism. The composite film shows dynamic variations of the dual-mode signals, and the applications of UV sensing and anti-counterfeiting are analyzed. Sensitive dual-mode detection is realized in UV sensing, especially for UVB. The composite film has a dual-modal imaging capability with good reproducibility and high resolution for security information encryption and anti-counterfeiting. This work provides a novel strategy for fabricating advanced PFMs for multiple optical applications.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"60 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143827526","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

Organotin(IV) Compounds Catalyzed Cyanide-free Synthesis of α-Iminonitriles 有机锡（IV）化合物催化无氰合成α-亚硝基

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-14 DOI: 10.1039/d5dt00492f

Manish Kumar, Sudipta Chakraborty, Hari Pada Nayek

引用次数: 0

Design of crystalline layered coordination polymers that respond to light and heat stimuli 对光和热刺激有反应的晶体层状配位聚合物的设计

IF 4 3区化学

Dalton Transactions Pub Date : 2025-04-14 DOI: 10.1039/d5dt00156k

Kenichiro Omoto, Gwenael Rapenne

引用次数: 0