Dalton Transactions最新文献

{"title":"Insights into the enhancement of oxygen evolution catalysis in Ce-mediated amorphous CoFe-based (oxy)hydroxide","authors":"Ji-Dong Song, Hao Hu, Jian-Li Mi, Fu-Ming Qi, Beibei Xiao, Zhizhong Yuan","doi":"10.1039/d5dt01962a","DOIUrl":"https://doi.org/10.1039/d5dt01962a","url":null,"abstract":"Heteroatom doping and nanostructure engineering are recognized as pivotal strategies for enhancing the oxygen evolution reaction (OER) performance of layered double hydroxides (LDHs) and (oxy)hydroxides. However, the reason of performance improvement remains controversial. Herein, we report a Ce-incorporated amorphous CoFe-(oxy)hydroxide nanoparticles on nickel foam (NF) via a one-step electrodeposition method, achieving excellent OER activity with a low overpotential (η = 0.220 V at 10 mA cm-2 in 1.0 M KOH), ranking among the top-performing CoFe-based OER catalysts. Intriguingly, despite that Ce incorporation can reduce the overpotential of CoFe-(oxy)hydroxide, the intrinsic activity and the reaction kinetics are suppressed through Ce incorporation. Instead, the enhancement of OER activity primarily stems from the small particle size and the fast charge transfer. Ce incorporation suppresses the particle coalescence during synthesis, thereby increasing the electrochemically active surface area. In addition, Ce incorporation modulates the interfacial charge-transfer resistance effectively. This work highlights a method for designing high-performance OER catalysts through morphological engineering and electric conductivity modulation.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"12 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145035660","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":"808 nm near infrared excited Ho3+ and Tm3+ based metal-organic frameworks for luminescent thermometry and photothermal conversion*","authors":"Albenc Nexha, Dasheng Lu, Maria Cinta Pujol Baiges, Jaume Massons, Patricia Haro Gonzalez, Hélène Serier-Brault, Joan Josep Carvajal","doi":"10.1039/d5dt01525a","DOIUrl":"https://doi.org/10.1039/d5dt01525a","url":null,"abstract":"Lanthanide based metal-organic frameworks are emerging as a class of materials with multiple applications. This is due to the combination of the unique optical properties of lanthanide ions and the extra functionalities added by the metal-organic frameworks. Nevertheless, up to now, these properties have not been explored up to their full potential. In this work, we are proving, for the first time, that Ho3+, Tm3+ based on 1,3-benzenedicarboxylic acid metal-organic frameworks can be applied as luminescent thermometers and also as photothermal agents, using their upconversion properties after excitation at 808 nm.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"3 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145035657","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":"Effect of bromo-substituent on magnetization dynamics of dysprosium coordination polymers constructed by hybrid-ligand conception","authors":"Hao-Ling Sun, Fang Ma, Lei Zhang, Chan Yang, Zhen-Na Huang, Xiaoxiao Huang","doi":"10.1039/d5dt01924a","DOIUrl":"https://doi.org/10.1039/d5dt01924a","url":null,"abstract":"Two novel two-dimensional dysprosium coordination polymers, {[DyL(bpeedo)(ClO<small>₄</small>)]ClO<small>₄</small>•CH<small>₃</small>OH}n (<strong>1</strong>) and {[DyL′(bpeedo)<small>_1.5</small>(CH<small>₃</small>OH)](ClO<small>₄</small>)<small>₂</small>•3CH<small>₃</small>OH}n (<strong>2</strong>), featuring slow magnetic relaxation under zero dc field, have been successfully assembled using Schiff base ligands of N′-(2-hydroxybenzylidene)pyridine-N-oxide-carbohydrazide (HL) and N′-(2-hydroxy-5-bromobenzylidene)pyridine-N-oxide-carbohydrazide (HL′) with O-N-O coordination pocket and the bridging ligand of 1,2-bis(4-pyridyl-N-oxide)ethene (bpeedo). Single-crystal X-ray diffraction analysis indicates that both compounds possess similar dimeric structure bridged by Schiff base ligand, with further extension via μ<small>₃</small>- and μ<small>₂</small>-bpeedo linkers, respectively. Notably, the introduction of bromo-substituent on the Schiff-base ligand can induce subtle modification of the coordination environments around Dy<small>³⁺</small> ions while great change of the linkage between them, ultimately affecting their magnetic properties, as evidenced by the different energy barriers of 421(8) K and 268 (10) K for complexes <strong>1</strong> and <strong>2</strong>, respectively. Theoretical calculations and magneto-structural analysis reveal that the higher energy barrier of <strong>1</strong> stems from the Ising-type magnetic anisotropy of Dy<small>³⁺</small> ions and the strong antiferromagnetic interaction mediated by μ<small>₃</small>-bpeedo, which can effectively suppress the quantum tunneling of magnetization and facilitate the thermal-assisted spin flip through the second-excited state. In contrast, although the structural change induced by the bromo-substituent can slightly enhance the magnetic anisotropy of Dy<small>³⁺</small> ions in <strong>2</strong>, the weak antiferromagnetic coupling between them prevents the relaxation pathway through the second-excited state, resulting in its lower energy barrier and smaller coercive field.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"24 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145035661","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":"Study on high refractive index sensitivity four-band tunable absorber based on AlCuFe quasicrystal at terahertz frequencies","authors":"Wen Gao, Huafeng Zhang, Mengsi Liu, Shubo Cheng, Zao Yi","doi":"10.1039/d5dt01929j","DOIUrl":"https://doi.org/10.1039/d5dt01929j","url":null,"abstract":"Optical devices operating in the terahertz band have enormous potential applications, and research in this band is attracting increasing attention from researchers. In this paper, an absorber based on AlCuFe quasicrystal is proposed in the terahertz band, accompanied by four perfect narrow peak absorptions. The bottom layer of the model is gold, mainly serving a reflective function, above the gold is silicon dioxide, and a Dirac semimetal AlCuFe quasicrystal microstructure with hollow spaces around the edges and in the middle at the top. The finite element method is used for simulation calculation, followed by data post-processing and analysis of the device performance. Analysis revealed that this absorber achieved perfect absorption with absorption rates exceeding 94% at frequencies of 4.99 THz, 6.138 THz, 7.846 THz, and 9.05 THz, with three of these frequencies reaching absorption rates above 97%. The physical mechanism was analyzed in detail by using cavity resonance (CR), impedance matching and equivalent circuit theories. The effects of geometrical parameters, electromagnetic wave incidence angle, and the external environment's refractive index on the absorber were thoroughly investigated. The absorber's maximum value of the refractive index sensitivity S was calculated to be 2800 GHz/RIU, which has high detection accuracy.In the field of detection, the quality factor Q value of an absorber is used to measure its energy loss and high selectivity, while the figure of merit (FOM) value plays a role in evaluating its sensing performance. We calculated the Q value and FOM value, with maximum values of 117.1 and 20.42, respectively, demonstrating that the terahertz perfect absorber proposed in this paper possesses exceptional detection performance.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"73 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145035664","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":"Use of 2,3-bis(diphenylphosphino)-N-phenylmaleimide ligand as a redox [Fe4S4] cubane surrogate in di-iron complexes related to [FeFe]-hydrogenases : influence of the dithiolate bridge on the redox behaviour","authors":"Andrea Mele, Federica Arrigoni, Catherine Elleouet, Francois Y Petillon, Philippe Schollhammer, Giuseppe Zampella","doi":"10.1039/d5dt01543j","DOIUrl":"https://doi.org/10.1039/d5dt01543j","url":null,"abstract":"The redox behaviour of two complexes with the 2,3-bis(diphenylphosphino)-N-phenylmaleimide (bmi) ligand related to the active site of [FeFe]-hydrogenases, [Fe2(CO)4(𝜅2-bmi)(µ-pdt)] (1) and [Fe2(CO)4(𝜅2-bmi)(µ-adtBn)] (2) [pdt = propane-1,3-dithiolate (µ-S(CH2)3S) and adtBn = N-benzyl-azapropane-1,3 dithiolate (µ-SCH2N{CH2(C6H5)}CH2S))] were studied. Complexes were synthesized by photolysis and they were characterized by IR, NMR (1H, 13C, 31P) spectroscopies and elemental analyses. The structures of 1 and 2 in solid state were solved by X-ray diffraction analysis. Their electrochemical behaviours were also studied by cyclic voltammetry in the presence and in the absence of proton. Two electron transfers are centred on the bmi ligand. Upon addition of acid (CH3CO2H or CH3SO3H), electrocatalytic events of proton reduction are detected. DFT studies were performed to rationalize the electron and proton transfers processes involving compounds 1 and 2 and have confirmed the role of bmi as a proton-sensitive-redox ligand. The diphosphine is the most favorable site for the transfer of electrons and protons but no direct involvement of the NPh group appeared. They support that upon successive electron and proton transfers the catalytic species are the doubly reduced and doubly protonated species at the bmi ligand and not their hydrido isomers. In 2, the amine of the dithiolate bridge plays the expected role of proton relay. Proton transfer to the bmi ligand is triggered upon reduction.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"129 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145035662","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":"On the chemistry of p-cymene ruthenium iodide complexes: entry into octahedral phenylated ruthenium(II) complexes supported by chelating bidentate N,N'-donor ligands.","authors":"Brandon Quillian,Allison Marks,Kennedy Musso,George Durrell,Joseph Bazemore,Clifford W Padgett,Alexis Fields,Dane Zurwell","doi":"10.1039/d5dt01437a","DOIUrl":"https://doi.org/10.1039/d5dt01437a","url":null,"abstract":"This study investigates the synthesis and reactivity of (η6-p-cymene)ruthenium(II) iodide complexes supported by the phosphite ligand P(OCH2)3CEt, aiming to better understand the behavior of the Ru-I bond in the context of synthesizing ruthenium(II) complexes featuring bidentate nitrogen-donor ligands. The complex (η6-p-cymene)RuI2(P{OCH2}3CEt) (2) was synthesized and phenylated to produce (η6-p-cymene)RuPh(I)(P{OCH2}3CEt) (6). Both compounds were subjected to halide abstraction reactions with silver tetrakis[3,5-((trifluoromethyl)phenyl)borate], affording their acetonitrile-coordinated, cationic species [(η6-p-cymene)RuI(NCMe)(P{OCH2}3CEt)][BArF'] (4) and [(η6-p-cymene)RuPh(NCMe)(P{OCH2}3CEt)][BArF'] (7) (BArF' = tetrakis[3,5-bis(trifluoromethyl)phenyl]borate, [B(C6H3-3,5-(CF3)2)4]-), respectively. Complex 4 dimerizes when heated in the absence of acetonitrile to form [(η6-p-cymene)Ru(μ-I)(P{OCH2}3CEt)]2[BArF']2 (5), while complex 7 activates chloroform to produce the isoelectronic chloro analogue of 5, [(η6-p-cymene)Ru(μ-Cl)(P{OCH2}3CEt)]2[BArF']2 (8). Heating 6 in acetonitrile affords the tetra-acetonitrile complex [(NCMe)4RuPh(P{OCH2}3CEt)][I] (9), whose iodide counterion can be exchanged with triflate or BArF' anions to yield complexes 10 and 11, respectively. The tetra(acetonitrile)ruthenium complexes (9, 10, and 11) exhibit differentiated lability among its acetonitrile ligands, enabling selective substitution with bidentate N,N'-donor ligands to give cationic species of the type [(κ2-N,N-L)RuPh(P{OCH2}3CEt)(NCMe)2]+, where L = bis-(2,6-diisopropylphenyl)ethane-1,2-diimine (DAB, 12) or 4,4'-tert-butyl-2,2'-bipyridine (t-bipy, 14). The DAB ligand of complex 12 is highly labile when heated in acetonitrile, while the t-bipy analogue maintains coordination to the metal center at elevated temperatures. Heating complex 14 in benzene under pressurized ethylene resulted in stoichiometric formation of styrene, most likely via olefin insertion followed by β-hydride elimination. Cyclic voltammetry revealed a Ru(III/II) redox potential of +0.53 V for 14, suggesting that the complex may be too electron-rich to serve as an efficient olefin hydroarylation catalyst. All complexes were characterized by multinuclear NMR spectroscopic methods (1H, 13C, 31P, 19F), and several were structurally confirmed by single-crystal X-ray diffraction (2, 5, 6, 9, 11, and 12). The structure of 14 was assigned using advanced 2D NMR techniques (COSY, NOESY, HSQC).","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"45 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145032114","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":"Unusual magnetic and transport properties of heavily disordered Mn–Zn–M (M = Ga and Sn) alloys with a β-Mn-type chiral structure","authors":"Rahul Pan, Anyesh Saraswati, Amit Mondal, Pujalin Biswal, Debakanta Samal, Nitesh Kumar and Partha Pratim Jana","doi":"10.1039/D5DT01357G","DOIUrl":"10.1039/D5DT01357G","url":null,"abstract":"<p >The solid-solution alloys of Mn–Zn–Ga and Mn–Zn–Sn have been synthesized by a high-temperature method and structurally characterized by X-ray diffraction studies. The substitutional solid-solution alloys that crystallize in the chiral space group <em>P</em>4<small>₁</small>32 or <em>P</em>4<small>₃</small>32 adopt the A13-type structure (β-Mn). Similar to β-Mn, the 20 atoms in the cubic unit cell are distributed over 8<em>c</em> and 12<em>d</em> Wyckoff positions. In the structure of β-Mn-type Mn–Zn–Ga (Sn) alloys, the 8<em>c</em> position is occupied by the Mn atom only and remains unaffected by chemical substitution. The 12<em>d</em> site that forms a hyperkagomé network (“distorted windmill”) composed of corner-sharing triangles is randomly occupied by Mn, Zn, and M (M = Ga or Sn) atoms in the alloys of Mn<small>_0.80</small>Zn<small>_0.15</small>Ga<small>_0.05</small> and Mn<small>_0.80</small>Zn<small>_0.15</small>Sn<small>_0.05</small>. Both of them possess a magnetically frustrated ground state, and the magnetic frustration is attributed to the formation of a distorted network of corner-sharing triangles composed of mixed Mn/Zn/Ga(Sn) sites. The negative temperature coefficient of resistivity in Mn<small>_0.80</small>Zn<small>_0.15</small>Sn<small>_0.05</small> obeys the Mooij criterion, and the very low mobility of charge carriers can be attributed to the high degree of atomic disorder within the structures.</p>","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":" 38","pages":" 14469-14479"},"PeriodicalIF":3.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145032008","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":"A pair of chiral organic–inorganic hybrid tin compounds showing reversible phase transition and enhanced SHG properties","authors":"Ting Jiang, Mingjun Zou, Yaozhen Wu, Jie Zhou, Xin Yin, Wenjing Guo, Zhenhong Wei and Hu Cai","doi":"10.1039/D5DT01839K","DOIUrl":"10.1039/D5DT01839K","url":null,"abstract":"<p >This study synthesized and characterized two zero-dimensional chiral organic–inorganic hybrid isomers (<em>R</em>-APH<small>₂</small>)SnCl<small>₆</small> (<strong>1</strong>) and (<em>S</em>-APH<small>₂</small>)SnCl<small>₆</small> (<strong>2</strong>) (where AP is 3-aminopyrrolidine). Their phase transition behaviors, chiral optical properties, and crystal structures were investigated <em>via</em> differential scanning calorimetry (DSC), vibrational circular dichroism (VCD), second harmonic generation (SHG) measurements, and high/low-temperature single-crystal X-ray diffraction analysis. The results showed that the two compounds undergo high-temperature reversible first-order phase transitions at 422/448 K and 418/448 K, respectively, with the high/low-temperature single-crystal symmetry exhibiting the rare characteristic of inverse temperature-induced symmetry breaking (ITSB). SHG tests revealed that during the phase transition, the compounds display a unique antisymmetric nonlinear optical switching effect: the low-temperature phase (chiral space group <em>P</em>2<small>₁</small>2<small>₁</small>2<small>₁</small>) is in the “SHG-low” state, while the high-temperature phase (non-centrosymmetric space group <em>P</em>2<small>₁</small>) transitions to the “SHG-high” state. The symmetric signals of VCD spectra at specific wavenumbers confirm their enantiomeric properties. Further research reveals that the synergistic displacement of organic cations (<em>R</em>/<em>S</em>-APH<small>₂</small><small>²⁺</small>) and the distortion synergy of inorganic metal frameworks ([SnCl<small>₆</small>]<small>²⁻</small>) constitute the core phase transition mechanism that drives changes in crystal symmetry and optical properties. This study provides a reference for the development of low-dimensional chiral materials with high phase transition temperatures, facilitating their applications in optoelectronic devices, chiral sensing, and other fields.</p>","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":" 38","pages":" 14559-14565"},"PeriodicalIF":3.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145035752","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":"Magnetic superexchange switching by transformation of trigonal bipyramid into square pyramid in Cu(II)-nitroxide complex","authors":"Kseniya Maryunina, Koyo Yamaguchi, Katsuya Inoue, Arkady A. Samsonenko, Sergey L. Veber, Kristina Smirnova, Artem Bogomyakov, Gleb Letyagin, Galina Romanenko, Vitaliy A Morozov","doi":"10.1039/d5dt01274k","DOIUrl":"https://doi.org/10.1039/d5dt01274k","url":null,"abstract":"The reaction of Cu(hfac)<small>₂</small> and imino nitroxide 2-(pyridin-4-yl)-4,4,5,5,5-tetramethyl-4,5-dihydro-1<em>H</em>-imidazol-1-oxyl (IN) gives the complex [Cu<small>₂</small>(hfac)<small>₄</small>(IN)]<small>_<em>n</em></small> (<strong>1</strong>), which has the structure of a chain-polymer with side branches. IN, acting as a <em>μ</em><small>₃</small>-O,N,N-tridentate ligand, bridges the intrachain Cu atoms through the O<small>_NO</small> atoms of the nitroxide groups and the N<small>_Im</small> atoms of the imidazoline ring of IN, while the N<small>_Py</small> atom of the pyridine cycle binds to the branching Cu atom. The specific disorder of the imino nitroxide fragment in IN and the intrachain Cu(hfac)<small>₂</small> moieties makes the structure of <strong>1</strong> almost similar to that of the complex [Cu<small>₂</small>(hfac)<small>₄</small>(NN)]<small>_<em>n</em></small> (<strong>2</strong>) with nitronyl nitroxide NN, an analog of IN. Thermally induced hysteretic change in the <em>χ</em>T value (T↓ = 109 K and T↑ = 119 K) and transformations of EPR spectra were found for the complex <strong>1</strong>. Applying pressure above 1.9 kbar not only completly suppresses this magnetic anomaly, but also manifests significant differences in the magnetic behavior of the low-temperature and pressure-stabilized modifications at <em>χ</em>T(T) curve. Comparing magnetostructural correlations for <strong>1</strong> at atmospheric and hydrostatic pressure with those for an analogue of nitronyl nitroxide <strong>2</strong> using quantum chemical calculations made it possible to clarify the nature of the magnetic anomaly. It was established that the magnetic transition of <strong>1</strong> is related to the transformation of the trigonal-bipyramidal environment of the branched Cu atom into a square-pyramidal one with a change in the position of the N<small>_Py</small> atom of the pyridine ring from equatorial to axial. EPR spectroscopy clearly indicates the changes of <em>g</em>-tensor components of the branching Cu<small>²⁺</small> ion, while the <em>g</em><small>_iso</small> parameter remaining almost unchanged. Magnetic anomaly in <strong>1</strong> revealed by SQUID magnetometry is a unique case of switching the indirect magnetic superexchange {Cu<small>²⁺</small>...IN} through the pyridine fragment during the rearengement of peripheral fragments of the structure.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"38 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145035663","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":"Highly selective Cu2+-coordination triggered multi-stimuli responsive and functional metallogel of bis-terpyridyl based low molecular weight (LMW) gelator","authors":"Poulami Panja, Utsav Ghosh, Amit Sil, Sanjib K Patra","doi":"10.1039/d5dt01843a","DOIUrl":"https://doi.org/10.1039/d5dt01843a","url":null,"abstract":"Oligo(ethylene glycol) (OEG) bridged two-armed bis-terpyridyl based ligand has been synthesized which can serve as a low molecular weight (LMW) gelator affording metallogel upon selective coordination to Cu(II) metal ion. The gelator can form metallogel at a concentration as low as 0.5 wt%. The gel exhibits various remarkable stimuli responsive behavior with alternate gel to sol transition and responds to a wide range of stimuli including pH, temperature, mechanical and chemical. The obtained soft material has been fully characterized by using a combination of experimental techniques including Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and Rheology measurements. The metallogel exhibits multifunctional properties including self-healing behavior and can tolerate a wide range of physical and chemical changes. The gel in its dried form (xerogel) shows excellent adsorption property selectively towards the anionic dye Congo red. Moreover, the gel can also detect ammonia in gel state by changing color and state. Most importantly, the fibrous networked metallogel also exhibits excellent catalytic activity for azide-alkyne cycloaddition (CuAAC) reaction and serves as a recyclable catalyst supported by the air-stable networked xerogel.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":"44 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145025651","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}