Dalton Transactions最新文献_第4页

Thermometer or Freezer: Dual Functionality in a 2D Mixed-Anion Terbium (III) Oxide Carbodiimide 温度计或冷冻室：二维混合阴离子铽（III）氧化物碳二亚胺的双重功能

IF 4 3区化学

Dalton Transactions Pub Date : 2025-05-26 DOI: 10.1039/d5dt01003a

Juan Medina, YiXu Wang, Hicham Bourakhouadar, Moritz Köller, Alexander J. Corkett, David Enseling, Thomas Jüstel, Richard Dronskowski

{"title":"Thermometer or Freezer: Dual Functionality in a 2D Mixed-Anion Terbium (III) Oxide Carbodiimide","authors":"Juan Medina, YiXu Wang, Hicham Bourakhouadar, Moritz Köller, Alexander J. Corkett, David Enseling, Thomas Jüstel, Richard Dronskowski","doi":"10.1039/d5dt01003a","DOIUrl":"https://doi.org/10.1039/d5dt01003a","url":null,"abstract":"Advances in the chemistry of compounds containing the NCN2– complex anion are leading to the discovery of new materials with interesting and promising properties. Here we present a comprehensive investigation of the optical and magnetic properties of the 2D phosphor Tb2O2NCN whose structure presents a double layer of Tb-triangular lattices separated from each other by the NCN2– anion, offering a conjunction of luminescent thermometry and magnetocaloric effect. Temperature-dependent luminescence studies reveal the typical behavior of thermal quenching, but when the temperature increases, a mechanism of direct relaxation to the 5D4 levels of Tb3+ ions is activated, thereby giving rise to an anti-thermal quenching effect. This peculiar feature has prompted us to explore the characteristics of Tb2O2NCN in temperature sensing, using the classical approach of optical ratiometric thermometry as well as an approach based on linear transformations (i.e., principal component analysis). The latter, by employing the entire emission spectrum, offers better sensitivity leading to more accurate temperature values. The magnetic properties of Tb2O2NCN reveal a long-range antiferromagnetic ordering below TN = 6.5 K as well as first-order field-induced metamagnetic transitions. The absence of hysteresis and its high magnetic density make Tb2O2NCN a fine candidate for magnetic refrigeration, with a surprisingly large value of –∆SM = 11.7 J kg–1 K–1 at 5 T, much more promising than those reported for other Tb-comprising compounds.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"64 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144136729","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

Trinuclear [FeIII2-MgII] compounds with aminopyridines as precursors for supported CC bond hydrogenation catalysts at atmospheric pressure in a plug-flow reactor. 以氨基吡啶为前体的三核[feii2 - mgii]化合物在常压塞流反应器中用于负载型碳/碳键加氢催化剂。

IF 4 3区化学

Dalton Transactions Pub Date : 2025-05-23 DOI: 10.1039/d5dt00653h

Kseniya A Koshenskova,Yana A Tigai,Denis N Nebykov,Anastasia V Lagutina,Vladimir M Mokhov,Fedor M Dolgushin,Lada S Razvorotneva,Nikolay N Efimov,Konstantin A Babeshkin,Natalia V Gogoleva,Vladimir K Imshennik,Sergey V Novichikhin,Igor L Eremenko,Irina A Lutsenko

{"title":"Trinuclear [FeIII2-MgII] compounds with aminopyridines as precursors for supported CC bond hydrogenation catalysts at atmospheric pressure in a plug-flow reactor.","authors":"Kseniya A Koshenskova,Yana A Tigai,Denis N Nebykov,Anastasia V Lagutina,Vladimir M Mokhov,Fedor M Dolgushin,Lada S Razvorotneva,Nikolay N Efimov,Konstantin A Babeshkin,Natalia V Gogoleva,Vladimir K Imshennik,Sergey V Novichikhin,Igor L Eremenko,Irina A Lutsenko","doi":"10.1039/d5dt00653h","DOIUrl":"https://doi.org/10.1039/d5dt00653h","url":null,"abstract":"The development of precursors for hydrogenation processes based on heterometallic iron(III) complexes will provide a relevant alternative to \"non-platinum\" catalysts. Methods for the synthesis of pivalate heterometallic compounds {FeIII-MgII} with aminopyridine (3-aminopyridine (β-ampy) and 4-aminopyridine (γ-ampy)) compositions [Fe2Mg(O)(piv)6(L)H2O]n·solv (L = β-ampy (1); γ-ampy (2), piv- - pivalic acid (Hpiv) anion, tBuCOOH; solv = 1.5CH3CN (1)) have been developed. According to X-ray data, the structural unit of 1 and 2 is a trinuclear motif {Fe2MgO}, which is connected into polymer chains through spiro fragments of ampy. The positions of metal atoms are clearly localized, which made it possible to unambiguously determine the geometric characteristics of the metal fragment. The formation and stabilization of supramolecular levels occur due to intermolecular hydrogen bonds, which form a clathrate system of a mesh type with included CH3CN solvent molecules for 1. Mössbauer spectroscopy data for 1 and 2 contain exclusively paramagnetic Fe3+ ions in a high-spin state (S = 5/2), located in an octahedral environment of nitrogen and oxygen atoms. Magnetic measurements of complex 1 demonstrate slow relaxation of magnetization induced by a constant magnetic field, occurring through Raman and direct relaxation mechanisms. Based on complexes 1 and 2, catalysts supported on γ-Al2O3 were obtained, which were tested in the processes of styrene (vinylbenzene, VB) and dicyclopentadiene (DCPD) hydrogenation in a flow-type reactor at atmospheric hydrogen pressure. The catalyst sample obtained using 1 demonstrated satisfactory efficiency in the studied processes, which made it possible to obtain yields of the corresponding hydrogenation products with a conversion of up to 80%.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"10 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144122335","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

Doxorubicin Carrier Mediated by HCOF Platform for Potent Cancer Therapy HCOF平台介导的阿霉素载体有效治疗肿瘤

IF 4 3区化学

Dalton Transactions Pub Date : 2025-05-23 DOI: 10.1039/d5dt00486a

Tingyan Jiang, Meng Liu, jiarui Qiao, Wenjing Wei, Xianhao Wei, Luwen Zhang, yan wang, Junhe Ou, Maolin Pang

引用次数: 0

A novel luminescent EuBTC@HA composite with dual sensing properties. 一种具有双传感特性的新型发光EuBTC@HA复合材料。

IF 4 3区化学

Dalton Transactions Pub Date : 2025-05-23 DOI: 10.1039/d5dt00458f

Weronika Bodylska,Adam W Augustyniak,Dariusz C Bieńko,Marzena Fandzloch

{"title":"A novel luminescent EuBTC@HA composite with dual sensing properties.","authors":"Weronika Bodylska,Adam W Augustyniak,Dariusz C Bieńko,Marzena Fandzloch","doi":"10.1039/d5dt00458f","DOIUrl":"https://doi.org/10.1039/d5dt00458f","url":null,"abstract":"This study aims to present a new composite material based on the EuBTC@HA system (where H3BTC = 1,3,5-benzenetricarboxylic acid and HA stands for hydroxyapatite) for dual sensing of Fe3+ ions and ofloxacin. It is the first example of a Eu(III)-based coordination polymer supported on a (bio)carrier. Selective detection of Fe3+ ions was possible in a wide concentration range of 1.00 × 10-2 M down to 7.80 × 10-5 M, with quenching at a concentration of 7.50 × 10-3 M. An analogous study was performed for EuBTC, showing comparable photoluminescence activity. Therefore, the maximum use of the active form of EuBTC with its minimal amount in EuBTC@HA allowed the reduction of metal concentration (31.7 vs. 13.6 wt% Eu) while maintaining activity. In addition, the reusability of EuBTC@HA was determined, showing that it may be used at least five times for the detection of Fe3+ ions without a significant change in emission intensity. Furthermore, using EuBTC@HA allows for the detection of Fe3+ ions in buffers within the pH range of 4.5-8.8. The additional functionality of EuBTC@HA was confirmed by the ability to detect ofloxacin at a concentration of 3.90 × 10-5 M with a naked-eye colour change effect. Finally, the fluorescence quenching mechanism for Fe3+ ions and ofloxacin was also investigated.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"18 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144122334","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

Novel gadolinium garnet Gd3Te2Li3O12: Magnetism and magnetocaloric performance for sub-kelvin cryogenic applications 新型钆石榴石Gd3Te2Li3O12：亚开尔文低温应用的磁性和磁热性能

IF 4 3区化学

Dalton Transactions Pub Date : 2025-05-22 DOI: 10.1039/d5dt00989h

Xuetong He, Lu Tian, Jianjian Gong, Zhaojun Mo, Xinqiang Gao, Guodong Liu

{"title":"Novel gadolinium garnet Gd3Te2Li3O12: Magnetism and magnetocaloric performance for sub-kelvin cryogenic applications","authors":"Xuetong He, Lu Tian, Jianjian Gong, Zhaojun Mo, Xinqiang Gao, Guodong Liu","doi":"10.1039/d5dt00989h","DOIUrl":"https://doi.org/10.1039/d5dt00989h","url":null,"abstract":"The global helium shortage and escalating costs in cryogenic engineering have intensified demands for helium-free refrigeration technologies. Adiabatic demagnetization refrigeration (ADR) based on the magnetocaloric effect (MCE) presents a viable solution, with its efficacy fundamentally dependent on advanced magnetocaloric materials. Here we present the successful synthesis of a novel gadolinium garnet Gd3Te2Li3O12 through solid-state reaction, which crystallizes in the cubic Ia-3d space group. The integration of magnetic characterization results with density functional theory (DFT) calculations establishes Gd3Te2Li3O12 as an antiferromagnetic compound exhibiting ultra-low magnetic ordering below 0.4 K. A comprehensive evaluation of the sub-kelvin magnetocaloric parameters demonstrates advantageous characteristics compared to commercial gadolinium gallium garnet (GGG) benchmarks, featuring both reduced magnetic ordering temperature and optimized entropy variation in the sub-Kelvin regime. These metrics position Gd3Te2Li3O12 as a prime candidate for sub-Kelvin ADR systems, while the observed geometrically frustrated magnetic sublattice configuration suggests new design principles for next generation magnetocaloric materials.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"42 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144113377","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

Hierarchical lanthanide based self-assembly complexes that undergo reversible luminescent response to both temperature changes and chemical reactions within competitive media 基于分层镧系元素的自组装复合物在竞争介质中对温度变化和化学反应都有可逆的发光响应

IF 4 3区化学

Dalton Transactions Pub Date : 2025-05-22 DOI: 10.1039/d5dt00831j

Thorfinnur Gunnlaugsson, Ena Thea Luis, Tumpa Gorai, June Lovitt, Brendan Twamley

{"title":"Hierarchical lanthanide based self-assembly complexes that undergo reversible luminescent response to both temperature changes and chemical reactions within competitive media","authors":"Thorfinnur Gunnlaugsson, Ena Thea Luis, Tumpa Gorai, June Lovitt, Brendan Twamley","doi":"10.1039/d5dt00831j","DOIUrl":"https://doi.org/10.1039/d5dt00831j","url":null,"abstract":"Here we report hierarchical self-assembly formation of luminescent Eu3+-1-DPA complex in mixed aqueous-organic (THF or ethanol) solutions and its reversible responsive behaviour to temperature change and in situ chemical reactions were investigated. The ligands 1-DPA and 1-DPA-acetate as well as the Eu(III) complex of 1-DPA, Eu3+-1-DPA were synthesised, as well as their X-ray crystal structures were determined. The photophysical and material (morphological) properties of the ligands and the Eu(III) complexes formed in situ of both 1-DPA and 1-DPA-acetate were probed in mixed aqueous-organic (THF or ethanol) solutions. The ligands as well as the complexes were shown to aggregate into hierarchical and homogenously formed microspheres and microrods, as demonstrated by carrying out SEM imaging of the drop cast solutions of these complexes in ethanol-water mixtures. The Eu3+-1-DPA complex gave rise to Eu(III) centred emission [due to deactivation of the 5D0  7FJ (J = 1-4)], which showed reversible, thermo-responsive lanthanide centred emission, while in situ esterification using acidic anhydride (forming Eu3+-1-DPA-acetate, which was not emissive), and subsequent NaOH mediated hydrolysis of the Eu3+-1-DPA-acetate assembly induced both Eu(III)-emission and morphology changes as demonstrated using both spectroscopic and SEM imaging studies.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"42 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144122647","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

Polyoxometalate-based complex@graphene composite electrodes for efficient nitrate reduction to ammonia. 基于多金属氧酸盐complex@graphene的复合电极，用于硝酸盐高效还原为氨。

IF 4 3区化学

Dalton Transactions Pub Date : 2025-05-21 DOI: 10.1039/d5dt00597c

Nan Zhao,Xinming Wang,Shuang Rong,Qiushuang Jiang,Haoyun Li,Haijun Pang,Huiyuan Ma

{"title":"Polyoxometalate-based complex@graphene composite electrodes for efficient nitrate reduction to ammonia.","authors":"Nan Zhao,Xinming Wang,Shuang Rong,Qiushuang Jiang,Haoyun Li,Haijun Pang,Huiyuan Ma","doi":"10.1039/d5dt00597c","DOIUrl":"https://doi.org/10.1039/d5dt00597c","url":null,"abstract":"To replace the energy-intensive and polluting traditional ammonia synthesis process, in this study, we designed two polyoxometalate (POM)-based nickel/cobalt metal-organic composite catalysts, namely (HNCP)2[Ni(H2O)4]2[NiMo12(HPO4)4(PO4)4O30] (Ni-P4Mo6) and (HNCP)2[Co(H2O)4]2[CoMo12(HPO4)4(PO4)4O30] (Co-P4Mo6). These catalysts utilized {P4Mo6} as the structural unit, nickel/cobalt as the metal node, and π-conjugated organic ligands as the linkers, and they were loaded onto graphene oxide (GO) to enhance the conductivity and reaction contact area. Experimental results showed that in acidic electrolytes, Ni-P4Mo6/GO achieved an ammonia yield of 2.62 mg h-1 mg-1cat. at -0.6 V (vs. RHE) with a faradaic efficiency (FE) of 83.9% at -0.5 V, outperforming Co-P4Mo6/GO (1.63 mg h-1 mg-1cat. at -0.7 V; FE 85.3% at -0.3 V). Under neutral conditions, both the catalysts exhibited significantly improved performances (Ni-P4Mo6/GO: 11.6 mg h-1 mg-1cat. yield, 88.4% FE; Co-P4Mo6/GO: 11.1 mg h-1 mg-1cat. yield, 78.5% FE), surpassing most comparable catalysts. This work provides a novel strategy for developing efficient electrocatalysts for nitrate reduction to ammonia (e-NO3RR).","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"32 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144103911","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

Electron Deficient β-Trisubstituted Porphyrins: Synthesis, Structural, Spectral, and Electrochemical Studies and Their Intensity-Dependent Third-Order Nonlinear Optical Studies 电子缺陷β-三取代卟啉：合成、结构、光谱和电化学研究及其强度相关的三阶非线性光学研究

IF 4 3区化学

Dalton Transactions Pub Date : 2025-05-21 DOI: 10.1039/d5dt00618j

Reena Jangra, Amritha J Nair, Albin Kuriakose, Jitendra Nath Acharyya, Gaddam Vijaya Prakash, Muniappan Sankar

{"title":"Electron Deficient β-Trisubstituted Porphyrins: Synthesis, Structural, Spectral, and Electrochemical Studies and Their Intensity-Dependent Third-Order Nonlinear Optical Studies","authors":"Reena Jangra, Amritha J Nair, Albin Kuriakose, Jitendra Nath Acharyya, Gaddam Vijaya Prakash, Muniappan Sankar","doi":"10.1039/d5dt00618j","DOIUrl":"https://doi.org/10.1039/d5dt00618j","url":null,"abstract":"A series of electron-deficient β-trisubstituted 12-nitro-5,10,15,20-tetraphenyl-2,3-bis(trifluoromethyl)porphyrin, abbreviated as H2TPP(NO2)(CF3)2 and its metal complexes MTPP(NO2)(CF3)2 (where M = CoII, NiII, CuII, and ZnII) have been prepared and characterised by various spectroscopic techniques. The single crystal X-ray analysis revealed the saddle-shaped configuration of CoTPP(NO2)(CF3)2, NiTPP(NO2)(CF3)2 and CuTPP(NO2)(CF3)2 with average deviation of the 24-core atoms from the mean porphyrin plane, (∆24) ranging from ± 0.492 to ± 0.499 Å and the average displacement of β-pyrrole carbons from the porphyrin mean plane, (∆Cβ) range was found between ± 0.926 to ± 1.005 Å. H2TPP(NO2)(CF3)2 displayed a 28 nm red shift in the B-band and a 102 nm red shift in the longest Q-band (Qx(0,0)) as compared to H2TPP. In 1H NMR, the inner imino protons of H2TPP(NO2)(CF3)2 were observed at ‒1.72 ppm, which is significantly downfield shifted compared to H2TPP. The first ring reduction potential of MTPP(NO2)(CF3)2 (M = 2H, CoII, NiII, CuII, and ZnII) is 280–620 mV positively shifted compared to their corresponding MTPPs. Notably, it is observed that the synthesized MTPP(NO2)(CF3)2 porphyrins are readily reduced compared to their MTPPs. Intensity-dependent third-order nonlinear optical studies demonstrated that the synthesized asymmetric β-substituted electron-deficient porphyrins exhibit a significant two-photon absorption coefficient (β = 0.04 – 8.10  10–10 m/W) and two-photon absorption cross-section values (σ_2PA = 0.02 – 1.67 x 10^6 GM). Additionally, the materials display a self-defocusing negative nonlinear refraction (n2 = (‒) 1.08 ‒ 40.27 × 10‒17 m2/W). The extracted NLO data suggests the potential of the presently investigated porphyrins as future optoelectronic and advanced materialistic applications.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"152 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144104015","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: Construction of ternary TiO2/CdS/IrO2 heterostructure photoanodes for efficient glycerol oxidation coupled with hydrogen evolution 更正：构建三元TiO2/CdS/IrO2异质结构光阳极，用于高效甘油氧化和析氢

IF 4 3区化学

Dalton Transactions Pub Date : 2025-05-21 DOI: 10.1039/d5dt90077h

Chenfeng Jiang, Yibo Ding, Jiayu Lin, Yi Sun, Wei Zhou, Xiaoyan Zhang, Hongbin Zhao, Weimin Cao, Danhong Cheng

引用次数: 0

Heteropolynuclear PdAg4 Complexes with Self-Assembled Trans-Chelating {(Ar2pz)3Ag2} Units 具有自组装反式螯合{(Ar2pz)3Ag2}单元的异多核PdAg4配合物

IF 4 3区化学

Dalton Transactions Pub Date : 2025-05-21 DOI: 10.1039/d5dt01078k

Kana Kinoshita, Yiming Yang, Shiho Nagano, Shinnosuke Horiuchi, Yoshihide Nakao, Kenichiro Omoto, Eri Sakuda, Yasuhiro Arikawa, Keisuke Umakoshi

引用次数: 0