{"title":"Synthesis and anticancer evaluation of platinum(II)-robustine complexes","authors":"Ju-Mei Zhang, Xiao-Zhen Qin, Fu-Liu Luo, Zhen Zhou, Ming-Xiong Tan, Chun-Jie Liang, Hong Liang, Qi-Pin Qin","doi":"10.1007/s11243-026-00720-7","DOIUrl":"10.1007/s11243-026-00720-7","url":null,"abstract":"<div><p>In this study, two Pt(II)–8-hydroxyquinoline derivatives, [Pt(Rob)(DMSO)Cl] (<b>RoPt</b>), and [Pt(Ah)(DMSO)Cl] (<b>AhPt</b>), incorporating robustine (H-Rob) and 5-amino-8-hydroxyquinoline (H-Ah), respectively, were synthesized and characterized. <b>RoPt</b> and <b>AhPt</b> exhibited antiproliferative effects in human cisplatin-resistant ovarian SK-OV-3/DDP (3SKD) and ovarian SK-OV-3 (3SK) cancer cells, with <b>RoPt</b> showing the strongest activity (IC<sub>50</sub> = 6.42 ± 0.21 μM) compared with cisplatin, cis-Pt(DMSO)<sub>2</sub>Cl<sub>2</sub>, <b>AhPt</b>, H-Rob, and H-Ah. Notably, <b>RoPt</b> and <b>AhPt</b> induced apoptosis in 3SKD cells by triggering mitophagy pathways and inhibiting ATP and mitochondrial respiratory chain complex I/IV (MiRCC-I/MiRCC-IV) production. In vivo, <b>RoPt</b> displayed marked tumor suppression (ca. 37.1%) without causing notable body weight loss or mortality in 3SK tumor-bearing mice. These findings highlight the Pt(II)-robustine derivatives <b>RoPt</b> and <b>AhPt</b> as promising antiproliferative agents warranting further investigation.</p><h3>Graphical abstract</h3><p>Complexes <b>RoPt</b> and <b>AhPt</b> exerted cell apoptosis via induction of mitophagy pathways, inhibition of ATP and mitochondrial respiratory chain production.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147341142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alaa Shafie, Mohammed Fareed Felemban, Faris J. Tayeb, Amal Adnan Ashour
{"title":"Dual-Action innovation: schiff base for trace Cu2+ ions detection and powerful antibacterial potential","authors":"Alaa Shafie, Mohammed Fareed Felemban, Faris J. Tayeb, Amal Adnan Ashour","doi":"10.1007/s11243-025-00698-8","DOIUrl":"10.1007/s11243-025-00698-8","url":null,"abstract":"<div><p>A novel Schiff base <b>SBA1</b>, was successfully synthesized and structurally characterized using UV-Vis, FTIR, and <sup>1</sup>H NMR spectroscopy. Its sensing capabilities were systematically investigated against a broad range of metal ions, including Cu<sup>2+</sup>, Co<sup>2+</sup>, Zn<sup>2+</sup>, Pb<sup>2+</sup>, Ag<sup>+</sup>, Cd<sup>2+</sup>, Mg<sup>2+</sup>, Ni<sup>2+</sup>, Ca<sup>2+</sup>, Fe<sup>3+</sup>, Mn<sup>2+</sup>, Hg<sup>2+</sup>, K<sup>+</sup>, and Na<sup>+</sup>. Among these, <b>SBA1</b> exhibited a highly selective and distinct colorimetric response toward Cu<sup>2+</sup> ions, marked by a visible color change from yellow to colorless. Fluorescence studies further revealed a substantial enhancement in emission intensity upon Cu<sup>2+</sup> binding, indicating strong interaction and excellent sensing performance. The sensor demonstrated impressive sensitivity, achieving a limit of detection (LOD) of 0.0031 ppm (0.049 µM) and a limit of quantification (LOQ) of 0.0096 ppm, enabling trace-level detection of Cu²⁺ ions in aqueous media. To evaluate its practical utility, the <b>SBA1</b> was tested in real environmental samples, including soil-extracted water, drinking water, lake water, river water, and pond water. Fluorescence titration with Cu²⁺-spiked samples showed outstanding recovery rates ranging from 91.0% to 102.0%, confirming the sensor reliability and accuracy in complex matrices. In addition to its sensing capabilities, the antibacterial potential of <b>SBA1</b> was also assessed against selected bacterial strains. The compound exhibited notable antibacterial activity, indicating its dual functionality as both a highly sensitive Cu<sup>2+</sup> sensor and an effective antimicrobial agent. These findings position <b>SBA1</b> as a promising multifunctional material for environmental monitoring and biomedical applications.</p></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Two novel benzotriazole Cu(II) complexes: synthesis, structure and antidiabetic activity","authors":"Xia Wang, Han-Bing Li, Di Cheng, Meng-Meng Cao, Wen-Ke Yang, Tan-Peng Zhou","doi":"10.1007/s11243-025-00708-9","DOIUrl":"10.1007/s11243-025-00708-9","url":null,"abstract":"<div><p>Two novel benzotriazole Cu(II) complexes, [Cu(bmem)(CH<sub>3</sub>O)Cl]<sub>n</sub> (<b>1</b>) and [Cu(btmt)(H<sub>2</sub>O)(SO<sub>4</sub>)]<sub>2</sub> (<b>2</b>), were synthesized and characterized using 1-(benzotriazole-1-methyl)-1-(2-ethylimidazole) (bmem) and 1-(benzotriazole-1-methyl)-1-triazole (btmt) as ligands. X-ray single crystal diffraction analysis indicates that complex <b>1</b> forms a one-dimensional chain structure of a double-nuclear copper unit, while complex <b>2</b> forms a discrete binuclear copper unit. Their antidiabetic activities were thoroughly investigated. The antidiabetic activity assays demonstrated that both complexes exhibited inhibitory effects against α-amylase and α-glycosidase enzymes. Specifically, complex <b>1</b> showed IC<sub>50</sub> values of 2.92 × 10<sup>− 3</sup> M for α-amylase and 2.39 × 10<sup>− 6</sup> M for α-glycosidase, while complex <b>2</b> exhibited IC<sub>50</sub> values of 1.89 × 10<sup>− 3</sup> M and 1.63 × 10<sup>− 6</sup> M, respectively, with complex <b>2</b> displaying a stronger inhibitory effect overall. Furthermore, to evaluate the effects of complexes <b>1</b> and <b>2</b> on glucose metabolism, we treated insulin-resistant (IR) HepG2 cells with each complex. The results demonstrated that complexes <b>1</b> and <b>2</b> enhanced glucose uptake by 1.20-fold and 1.32-fold, respectively, compared to the untreated control.</p></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ana Beatriz Lazzarini, Andresa Alves de Lima, Ana Maria Romão Polez, Pedro Henrique Sêneda Silveira, Renan Diego Zanetti, Angelica Ellen Graminha, José Clayston Melo Pereira, Mauro Almeida Lima, Fillipe Vieira Rocha, Renan Lira de Farias, Mariete Barbosa Moreira, Adelino Vieira de Godoy Netto, A. V. G. Netto
{"title":"Novel silver complexes bearing trans-cinnamaldehyde-derived thiosemicarbazones: synthesis, characterization, and effects against tumour cell lines","authors":"Ana Beatriz Lazzarini, Andresa Alves de Lima, Ana Maria Romão Polez, Pedro Henrique Sêneda Silveira, Renan Diego Zanetti, Angelica Ellen Graminha, José Clayston Melo Pereira, Mauro Almeida Lima, Fillipe Vieira Rocha, Renan Lira de Farias, Mariete Barbosa Moreira, Adelino Vieira de Godoy Netto, A. V. G. Netto","doi":"10.1007/s11243-025-00711-0","DOIUrl":"10.1007/s11243-025-00711-0","url":null,"abstract":"<div><p>Cancer represents a public health problem as well as an economic burden. Considering that cell resistance and side effects have limited the clinical use of anticancer platinum(II)-based chemotherapeutics, silver(I) compounds have appeared as potential candidates due to their multi-target mode of action and low toxicity in healthy cell lines. In this work, we report the synthesis, characterization and biological evaluation of new silver complexes [Ag(<i>R</i>-cTSC)(phen)]NO<sub>3</sub>·H<sub>2</sub>O, <b><i>R</i></b><b>-cTSC</b> = <i>trans</i>-cinnamaldehyde-<i>N</i>(4)-<i>R</i>-thiosemicarbazone (<i>R</i> = H (<b>C1</b>), methyl (<b>C2</b>), ethyl (<b>C3</b>), phenyl (<b>C4</b>)) and phen = 1,10-phenanthroline. Silver complexes <b>C1</b>-<b>C4</b> were tested against some tumour cell lines, with IC<sub>50</sub> values varying in the range of 1.6–4.4 µM (A2780cis), 5.4–23.3 µM (A549), and 6.5–15.9 µM (MCF-7). Results from cytotoxic evaluation and colony formation assay data indicated that <b>C3</b> exerted a good effect towards A2780cis (3.8 ± 0.3 µM), A549 (5.5 ± 0.1 µM) and MCF-7 (8.1 ± 0.7 µM) and displayed both cytotoxic and cytostatic effects against A2780cis cells at 1.1 µM. DNA binding studies showed that <b>C3</b> was able to release part of bound Hoechst 33258 from the minor groove and inhibited topoisomerase-IIα catalytic activity at low concentration (> 1 µM). Additionally, in silico studies suggested interaction between the 1,10-phen moiety and topoisomerase-IIα Lys157 and Arg98 amino acid residues.</p></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Strong antiferromagnetic interaction in µ-Oxo-bridged diiron(III) complex and paramagnetic nickel(II) complex of pyridoxal Schiff base ligands","authors":"Viera Murašková, Václav Eigner, David Sedmidubský","doi":"10.1007/s11243-025-00713-y","DOIUrl":"10.1007/s11243-025-00713-y","url":null,"abstract":"<div><p>Dinuclear and mononuclear pyridoxal Schiff base complexes, specifically [{FeL}<sub>2</sub>(<i>µ</i>-O)]·2.2H<sub>2</sub>O (<b>1</b>) and [NiL’(H<sub>2</sub>O)]·2H<sub>2</sub>O (<b>2</b>) (where L<sup>2–</sup> is the dianion of tetradentate pyridoxal Schiff base generated in situ by the iron-catalyzed oxidative C − N bond cleavage of the initial pentadentate Schiff base, and L’<sup>2–</sup> is the dianion of pentadentate Schiff base ligand formed from pyridoxal and <i>N</i>-(2-aminoethyl)propane-1,3-diamine) have been synthesized and characterized by elemental analysis, Fourier transform infrared spectroscopy, and mass spectrometry. The crystal structures of these complexes were determined using single-crystal X-ray diffraction. The Fe atoms in complex <b>1</b> exhibit a distorted square pyramidal coordination geometry, while Ni atom in complex <b>2</b> displays a distorted octahedral geometry. The most significant finding is the strong antiferromagnetic exchange coupling observed in the diiron complex <b>1</b>. Magnetic susceptibility data revealed an exchange coupling constant of <i>J</i> = − 173 cm<sup>–1</sup>, confirming its potential role as a model for non-heme diiron metalloenzymes. In contrast, complex <b>2</b> exhibits typical paramagnetic behavior of an octahedral Ni(II) complex with two unpaired electrons. Calculations based on density functional theory confirmed the high-spin state of the Fe(III) centers in the diiron complex and verified the magnitude of the strong antiferromagnetic exchange coupling. For the nickel complex, these calculations also revealed a significant degree of bond covalency, providing a comprehensive understanding of the structural and magnetic properties of these pyridoxal-based coordination compounds.</p></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11243-025-00713-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A environment-friendly utilization of flue gas desulfurization residue for removing hexavalent chromium from electroplating wastewater","authors":"Dean Fang, Xueyuan Li, Xiangxin Xue","doi":"10.1007/s11243-026-00714-5","DOIUrl":"10.1007/s11243-026-00714-5","url":null,"abstract":"<div><p>A novel environment-friendly utilization manner of the flue gas desulfurization residue from wet magnesia flue gas desulfurization process and semi-dry calcium flue gas desulfurization process was proposed. In this article, the wet magnesia flue gas desulfurization residue and the semi-dry calcium flue gas desulfurization residue were respectively regarded as a high price-performance water treatment agent to detoxify the hexavalent chromium in the electroplating wastewater. The main technological mechanism and optimal parameters of the hexavalent chromium removal process were investigated. When the detoxification process was performed by using a residue from wet magnesia flue gas desulfurization process, the residual pollutant concentration in treated wastewater under the optimal experimental parameters was as follow: the hexavalent chromium residue decreased to 0.035 mg/L, total chromium residue decreased to 0.08 mg/L and magnesium residue was 73.5 mg/L. When the detoxification process was performed by using a residue from semi-dry calcium flue gas desulfurization process, the residual pollutant concentration in treated wastewater under the optimal experimental parameters was as follow: the hexavalent chromium residue decreased to 0.021 mg/L, total chromium residue decreased to 0.085 mg/L and calcium residue was 227 mg/L. The present work not only provided a new resource utilization approach of desulfurization residue from wet magnesia desulfurization technology and semi-dry calcium desulfurization technology, but also provided a high price-performance, efficient and environmentally friendly detoxification process for the electroplating wastewater which give attention to economic benefit and environmental factors.</p></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Eco-friendly thermolytic synthesis of PbS nanoparticles using single source precursor: role of castor oil and ricinoleic acid in tailoring particle properties","authors":"Ginena Bildard Shombe, Sixberth Mlowe","doi":"10.1007/s11243-025-00709-8","DOIUrl":"10.1007/s11243-025-00709-8","url":null,"abstract":"<div><p>Growing concerns over the toxicity and environmental impact of conventional surfactants have accelerated the search for eco-friendly capping agents for nanomaterials synthesis. In this study, we have employed castor oil (CO) and ricinoleic acid (RA) as green capping and dispersing agents in the preparation of PbS nanoparticles. The synthesis was carried out via thermolysis of bis(tetrahydroquinolinedithiocarbamato)lead(II) complex at temperatures ranging from 190 to 300 °C. The influence of the nature of the capping agent and the synthesis temperature on the morphology, structure, and optical properties of the synthesized particles was studied. P-XRD analysis demonstrated formation of crystalline, phase pure cubic rock salt PbS at all reaction conditions. Morphological characterization revealed distinct, temperature dependent evolution of particle morphologies. Castor oil-capped nanoparticles exhibited a progression in anisotropic morphologies with increasing temperature, in which a mixed population of quasi-spherical particles, nanorods, multipods, and cuboidal structures were observed at 190 °C, while predominantly branched star-like structures were formed at higher temperatures. In contrast, ricinoleic acid capped nanoparticles displayed a transition from quasi-spherical to cuboidal and rod-like structures with increasing temperature, which reflects a balance between kinetic and thermodynamic growth pathways. UV-Vis-NIR spectra of all the synthesized particles were blue shifted relative to bulk PbS, with Tauc analysis yielding direct band gaps in the range of 1.125–0.816 eV, confirming the synthesis of nanoscale PbS. This study highlights the potential of both castor oil and its major fatty acid component, ricinoleic acid, as renewable, biodegradable, and environmentally benign capping and dispersing agents for the green synthesis of PbS nanoparticles.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Hierarchical gold nanoflowers via PIL-mediated facile synthesis: toward ultrasensitive SERS sensing of Rhodamine 6G","authors":"Shijie Li, Chenchen Zhao, Lingyu Wang, Xiaoqi Feng, Jiaqiang Hou, Tianyu Gao, Guoli Yang, Kaisheng Yao","doi":"10.1007/s11243-026-00719-0","DOIUrl":"10.1007/s11243-026-00719-0","url":null,"abstract":"<div><p>To address the limitations of traditional synthesis methods for gold nanostructures, which rely on high temperatures, toxic reagents, and harsh conditions, this study proposes an eco-friendly strategy for synthesizing gold spikelet nanoflowers using poly(ionic liquid) (PIL) as a structure-directing agent. By employing HAuCl<sub>4</sub> as the precursor and ascorbic acid (AA) as the reducing agent, hierarchical Au spikelet nanoflowers with tertiary structure were successfully prepared via a one-pot method in a 60 °C water bath. Systematic investigation of the influencing factors revealed that temperature, AA concentration, and PIL concentration collectively determine the product morphology, with PIL concentration exerting the most significant influence on both the morphology and hierarchical structure of the Au nanoflowers. Using Rhodamine 6G (R6G) as a molecular probe, the resulting substrate exhibited exceptional surface-enhanced Raman scattering (SERS) sensitivity, achieving a detection limit of 10<sup>− 12</sup> M for R6G, which surpasses the performance of most reported Au/Ag-based materials, and demonstrates high reproducibility (< 2% average relative deviation (RAD) from measurements at five randomly selected locations). This work provides a sustainable approach for fabricating high-performance SERS substrates, demonstrating promising potential for applications in biological sensing and diagnostics.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ali M. Hussein, Narinderjit Singh Sawaran Singh, Muktha Eti, Tanmoy Prida, S. Radhika, Gaganjot Kaur, Saodatkhon Ibragimova, Akmal Abilkasimo, Abdusalom Umarov, Aseel Smerat, Wissam Aziz Yousif
{"title":"Efficient storage and separation of methane using the metal–organic frameworks M2(m-dobdc)(M = Fe, Co, Ni, and Cu): a first-principles study","authors":"Ali M. Hussein, Narinderjit Singh Sawaran Singh, Muktha Eti, Tanmoy Prida, S. Radhika, Gaganjot Kaur, Saodatkhon Ibragimova, Akmal Abilkasimo, Abdusalom Umarov, Aseel Smerat, Wissam Aziz Yousif","doi":"10.1007/s11243-026-00715-4","DOIUrl":"10.1007/s11243-026-00715-4","url":null,"abstract":"<div>\u0000 \u0000 <p>Methane (CH<sub>4</sub>) storage media play a crucial role in promoting sustainable development. However, current materials encounter challenges related to storage capacity and operational conditions. Therefore, it is essential to develop new and innovative materials for capturing and storing CH<sub>4</sub>. The versatility of metal-organic frameworks (MOFs) allows for significant opportunities in this area due to their ease of functionalization. This inclusive innovation study explores the adsorption properties of CH<sub>4</sub> in M<sub>2</sub>(m-dobdc) MOFs (M = Fe, Co, Ni, Cu; m-dobdc<sup>4−</sup>=4,6-dioxido-1,3-benzenedicarboxylate) through first-principles calculations. Strong orbital interactions between the M and surrounding oxygens result in notable charge depletion on the metal atoms, making them potential sites for CH<sub>4</sub> adsorption. The strength of CH<sub>4</sub> adsorption at each metal site is evaluated by analyzing the adsorption energy, charge transfer, charge density difference map, and partial density of states. The type of metal atom has a minimal influence on the CH<sub>4</sub> storage capacity of M<sub>2</sub>(m-dobdc) frameworks. The findings reveal that M<sub>2</sub>(m-dobdc) can hold up to 18 CH<sub>4</sub> molecules (per unit cell) with an average adsorption energy of about − 0.44 eV. The M<sub>2</sub>(m-dobdc) frameworks can efficiently store and separate CH<sub>4</sub> molecules at moderate temperatures and pressures. Furthermore, M<sub>2</sub>(m-dobdc) frameworks demonstrate outstanding capability for separating CH<sub>4</sub> from CH<sub>4</sub>/CF<sub>4</sub>, CH<sub>4</sub>/N<sub>2</sub>, CH<sub>4</sub>/CO<sub>2,</sub> and CH<sub>4</sub>/H<sub>2</sub> binary mixtures. This study could pave the way for advancing functionalized MOFs that possess a significant capacity for CH<sub>4</sub> capture.</p>\u0000 </div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ika Fitri Ulfindrayani, Irmina Kris Murwani, Eko Sri Kunarti, Afifah Rosyidah, Harsasi Setyawati, Qurrota A’yuni, Abdul Wafi, Eka Cahya Muliawati
{"title":"Synthesis and characterization of pure ZnO and ZnO supported MgF2 for catalytic acylation of phenol","authors":"Ika Fitri Ulfindrayani, Irmina Kris Murwani, Eko Sri Kunarti, Afifah Rosyidah, Harsasi Setyawati, Qurrota A’yuni, Abdul Wafi, Eka Cahya Muliawati","doi":"10.1007/s11243-025-00710-1","DOIUrl":"10.1007/s11243-025-00710-1","url":null,"abstract":"<div><p>The catalysts MgF<sub>2</sub> supported ZnO (0; 2.5; 5; 7.5; 10 and 15% <i>w</i>/<i>w</i>) were synthesized by sol-gel method. The structure of the catalysts were characterized by XRD. The acidity of the catalyst determined by pyridine-FTIR method showed that 7.5% ZnO/MgF<sub>2</sub> had the highest acidity. The surface area of the ZnO/MgF<sub>2</sub> was measured by N<sub>2</sub> adsorption-desorption method. The surface area of the ZnO/MgF<sub>2</sub> catalysts decrease with the increase in Zn content. The measurement S<sub>BET</sub> of the catalysts was in range of 5.31 to 9.44 m<sup>2</sup>/g. The morphology of the catalyst was observed by Scanning Electron Microscope (SEM). The synthesized catalysts performance was tested in phenol acylation and were determined by High Performance Liquid Chromatography (HPLC), which the main products were <i>p</i>-HAP (hydroxyacetophenone) and PA (phenyl acetate). The formation of <i>p</i>-HAP was influenced by the Lewis acid site, while PA was influenced by the Brønsted acid site. The highest conversion was achieved 85.36% by 7.5% ZnO/MgF<sub>2</sub>, while the yields of the <i>p</i>-HAP and PA were 56.06 and 23.40% respectively.</p></div>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":"51 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}