Pub Date : 2026-04-01Epub Date: 2026-02-01DOI: 10.1016/j.poly.2026.118005
D.B. Sharma , S.A. Ansari , A. Bhattacharyya
This work presents a study on the separation of americium (Am) and europium (Eu) from simulated high-level waste (HLW) using a dual-solvent approach. TODGA (N,N,N′,N′-tetraoctyl diglycolamide) was employed as the extractant, while the sulphonated bis-triazinylpyridine derivative (SO3-Ph-BTP) served as a water-soluble selective stripping agent. The primary objective was to assess the practicality of a single-cycle actinide partitioning strategy which is increasingly recognized as a potential option for HLW management. Experiments were performed in an eight-stage mixer–settler system with 2 L of simulated HLW containing 241Am (t1/2 = 432 y) and 152,154Eu (t1/2 = 13 y). Eu was chosen as a representative of all lanthanides considering its radiochemical properties (gamma emitter) for easy quantification. More than 99.9% of both Am and Eu were transferred into the TODGA phase within four extraction stages. Subsequent stripping with SO3-Ph-BTP led to >99.9% recovery of Am over eight stages, while Eu remained quantitatively in the organic phase. The achieved decontamination factor of ∼103 for Am relative to Eu highlights the efficiency of this separation process. The findings demonstrate that a one-cycle Am recovery scheme is feasible, supporting the advancement of actinide–lanthanide partitioning concepts for future HLW management.
{"title":"Selective americium recovery from high level waste: demonstration of hydrophilic BTP enabled 1-cycle actinide partitioning","authors":"D.B. Sharma , S.A. Ansari , A. Bhattacharyya","doi":"10.1016/j.poly.2026.118005","DOIUrl":"10.1016/j.poly.2026.118005","url":null,"abstract":"<div><div>This work presents a study on the separation of americium (Am) and europium (Eu) from simulated high-level waste (HLW) using a dual-solvent approach. TODGA (<em>N,N,N′,N′</em>-tetraoctyl diglycolamide) was employed as the extractant, while the sulphonated bis-triazinylpyridine derivative (SO<sub>3</sub>-Ph-BTP) served as a water-soluble selective stripping agent. The primary objective was to assess the practicality of a single-cycle actinide partitioning strategy which is increasingly recognized as a potential option for HLW management. Experiments were performed in an eight-stage mixer–settler system with 2 L of simulated HLW containing <sup>241</sup>Am (t<sub>1/2</sub> = 432 y) and <sup>152,154</sup>Eu (t<sub>1/2</sub> = 13 y). Eu was chosen as a representative of all lanthanides considering its radiochemical properties (gamma emitter) for easy quantification. More than 99.9% of both Am and Eu were transferred into the TODGA phase within four extraction stages. Subsequent stripping with SO<sub>3</sub>-Ph-BTP led to >99.9% recovery of Am over eight stages, while Eu remained quantitatively in the organic phase. The achieved decontamination factor of ∼10<sup>3</sup> for Am relative to Eu highlights the efficiency of this separation process. The findings demonstrate that a one-cycle Am recovery scheme is feasible, supporting the advancement of actinide–lanthanide partitioning concepts for future HLW management.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"289 ","pages":"Article 118005"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122747","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}
Pub Date : 2026-04-01Epub Date: 2026-02-02DOI: 10.1016/j.poly.2026.117980
Luciano Salas , Benjamín Villalobos , Plinio Cantero-López , Ariel Herrera-Vásquez , Verónica Paredes-García , Carlos Cruz
We report the synthesis, structural elucidation, and bioactivity assessment of a novel series of isostructural coordination complexes, M-PBT, with the general formula [M(PBT)₂(hfac)₂] (M = Mn, Fe, Co, Ni, Cu, Zn), incorporating 2-(pyridin-4-yl)-1,3-benzothiazole (PBT) and hexafluoroacetylacetonate (hfac−) ligands. Single-crystal X-ray diffraction reveals that all complexes crystallize in the triclinic P-1 space group, featuring a trans-octahedral MN₂O₄ coordination geometry, where PBT ligands occupy axial positions and hfac− ligands coordinate in the equatorial plane. Comparative structural analysis highlights systematic trends in bond lengths and octahedral distortion parameters across the 3d metal series. Hirshfeld surface analysis and 2D fingerprint plots underscore the key role of directional supramolecular interactions, namely C–H···F non-classical hydrogen bonds, F···F contacts, and π–π stacking, in stabilizing the three-dimensional crystal packing. Theoretical studies corroborate structural findings. Biological assays using Arabidopsis thaliana and Pseudomonas syringae reveal metal-dependent inhibitory effects on plant growth and bacterial proliferation. These results demonstrate that rational selection of metal centers and ligand frameworks can modulate the physicochemical and bioactive properties of coordination complexes, with broader implications for supramolecular design and bioinorganic chemistry.
{"title":"First-row transition metal complexes with pyridine-benzothiazole and hexafluoroacetylacetonate ligands: supramolecular insights and biological effects","authors":"Luciano Salas , Benjamín Villalobos , Plinio Cantero-López , Ariel Herrera-Vásquez , Verónica Paredes-García , Carlos Cruz","doi":"10.1016/j.poly.2026.117980","DOIUrl":"10.1016/j.poly.2026.117980","url":null,"abstract":"<div><div>We report the synthesis, structural elucidation, and bioactivity assessment of a novel series of isostructural coordination complexes, <strong>M-PBT</strong>, with the general formula [M(PBT)₂(hfac)₂] (M = Mn, Fe, Co, Ni, Cu, Zn), incorporating 2-(pyridin-4-yl)-1,3-benzothiazole (PBT) and hexafluoroacetylacetonate (hfac<sup>−</sup>) ligands. Single-crystal X-ray diffraction reveals that all complexes crystallize in the triclinic <em>P</em>-1 space group, featuring a trans-octahedral MN₂O₄ coordination geometry, where <strong>PBT</strong> ligands occupy axial positions and hfac<sup>−</sup> ligands coordinate in the equatorial plane. Comparative structural analysis highlights systematic trends in bond lengths and octahedral distortion parameters across the 3<em>d</em> metal series. Hirshfeld surface analysis and 2D fingerprint plots underscore the key role of directional supramolecular interactions, namely C–H···F non-classical hydrogen bonds, F···F contacts, and π–π stacking, in stabilizing the three-dimensional crystal packing. Theoretical studies corroborate structural findings. Biological assays using <em>Arabidopsis thaliana</em> and <em>Pseudomonas syringae</em> reveal metal-dependent inhibitory effects on plant growth and bacterial proliferation. These results demonstrate that rational selection of metal centers and ligand frameworks can modulate the physicochemical and bioactive properties of coordination complexes, with broader implications for supramolecular design and bioinorganic chemistry.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"289 ","pages":"Article 117980"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122744","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}
Pub Date : 2026-04-01Epub Date: 2026-02-01DOI: 10.1016/j.poly.2026.118008
Kun Zhang, Qing-Yun Yang, An-Ran Liu, Yi-Xuan Shi, Yang Shi, Jing Ru
In this paper, a two-dimensional Co(II) coordination polymer (CP), {[Co2(AAPA)2(Bix)2(H2O)]·2DMF}n (designated as AAPA-Co1), was constructed using anthracene-derived organic ligand 5-((anthracen-9-ylmethyl)amino)isophthalic acid (H2AAPA), and the auxiliary ligand 1,4-Bis(imidazole-l-ylmethyl)benzene (Bix). The synthesized AAPA-Co1 exhibited excellent thermal stability and chemical stability in aqueous solutions across varying conditions. As anticipated, fluorescence sensing studies revealed that AAPA-Co1 could function as a highly sensitive “turn-off” fluorescence sensor for Cr₂O₇2− and 3-nitrotyrosine (3-NT), achieving low detection limits of 0.78 μM and 1.17 μM, respectively. Furthermore, the potential quenching reasons were also systematically investigated.
{"title":"Water-stable cobalt(II) coordination polymer and its fluorescence turn-off sensing towards Cr₂O₇2− and 3-nitrotyrosine in aqueous solution","authors":"Kun Zhang, Qing-Yun Yang, An-Ran Liu, Yi-Xuan Shi, Yang Shi, Jing Ru","doi":"10.1016/j.poly.2026.118008","DOIUrl":"10.1016/j.poly.2026.118008","url":null,"abstract":"<div><div>In this paper, a two-dimensional Co(II) coordination polymer (CP), {[Co<sub>2</sub>(AAPA)<sub>2</sub>(Bix)<sub>2</sub>(H<sub>2</sub>O)]·2DMF}<sub>n</sub> (designated as <strong>AAPA-Co1</strong>), was constructed using anthracene-derived organic ligand 5-((anthracen-9-ylmethyl)amino)isophthalic acid (H<sub>2</sub>AAPA), and the auxiliary ligand 1,4-Bis(imidazole-<em>l</em>-ylmethyl)benzene (Bix). The synthesized <strong>AAPA-Co1</strong> exhibited excellent thermal stability and chemical stability in aqueous solutions across varying conditions. As anticipated, fluorescence sensing studies revealed that <strong>AAPA-Co1</strong> could function as a highly sensitive “turn-off” fluorescence sensor for Cr₂O₇<sup>2−</sup> and 3-nitrotyrosine (3-NT), achieving low detection limits of 0.78 μM and 1.17 μM, respectively. Furthermore, the potential quenching reasons were also systematically investigated.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"289 ","pages":"Article 118008"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122746","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}
Pub Date : 2026-04-01Epub Date: 2026-02-01DOI: 10.1016/j.poly.2026.118006
Dharmendra B. Sharma , Arunasis Bhattacharyya , Amey P. Wadawale , Prasanta K. Mohapatra , Richard J.M. Egberink , Willem Verboom , Seraj A. Ansari
Diglycolamides (DGAs) are recognized as versatile ligands for actinide ions and facilitate the separation processes relevant to nuclear waste management. While DGAs with linear alkyl chains have been extensively characterized, very little is known about how the alkyl chain branching influences their coordination properties. In this study, the complexation of uranyl ions (UO22+) with three tetraalkyl DGA derivatives, namely, tetra-n-butyl (TnBDGA), tetra-sec-butyl (TsBDGA), and tetra-isobutyl (TiBDGA), was examined using UV–vis spectrophotometry, isothermal titration calorimetry, and single-crystal X-ray diffraction. The thermodynamic and spectroscopic results demonstrate that complex formation is endothermic and mainly driven by favorable entropy changes, attributed to solvent reorganization and ligand conformational effects. The order of the complex stability (TnBDGA > TsBDGA) indicates that increasing alkyl branching introduces steric constraints that weaken the complexation reaction. Structural analysis of the UO22+/TiBDGA complex reveals a tridentate coordination through the three oxygen donor atoms. These findings highlight the significant role of ligand structural variations in determining both the energetics and geometry of the uranyl/DGA interactions, providing valuable guidance for designing more efficient extractants for nuclear fuel cycle applications.
{"title":"Effect of alkyl chain architecture on diglycolamide complexation with uranyl ion: Insights from spectroscopy, calorimetry, and DFT","authors":"Dharmendra B. Sharma , Arunasis Bhattacharyya , Amey P. Wadawale , Prasanta K. Mohapatra , Richard J.M. Egberink , Willem Verboom , Seraj A. Ansari","doi":"10.1016/j.poly.2026.118006","DOIUrl":"10.1016/j.poly.2026.118006","url":null,"abstract":"<div><div>Diglycolamides (DGAs) are recognized as versatile ligands for actinide ions and facilitate the separation processes relevant to nuclear waste management. While DGAs with linear alkyl chains have been extensively characterized, very little is known about how the alkyl chain branching influences their coordination properties. In this study, the complexation of uranyl ions (UO<sub>2</sub><sup>2+</sup>) with three tetraalkyl DGA derivatives, namely, tetra-<em>n</em>-butyl (T<em>n</em>BDGA), tetra-<em>sec</em>-butyl (T<em>s</em>BDGA), and tetra-isobutyl (T<em>i</em>BDGA), was examined using UV–vis spectrophotometry, isothermal titration calorimetry, and single-crystal X-ray diffraction. The thermodynamic and spectroscopic results demonstrate that complex formation is endothermic and mainly driven by favorable entropy changes, attributed to solvent reorganization and ligand conformational effects. The order of the complex stability (T<em>n</em>BDGA > T<em>s</em>BDGA) indicates that increasing alkyl branching introduces steric constraints that weaken the complexation reaction. Structural analysis of the UO<sub>2</sub><sup>2+</sup>/T<em>i</em>BDGA complex reveals a tridentate coordination through the three oxygen donor atoms. These findings highlight the significant role of ligand structural variations in determining both the energetics and geometry of the uranyl/DGA interactions, providing valuable guidance for designing more efficient extractants for nuclear fuel cycle applications.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"289 ","pages":"Article 118006"},"PeriodicalIF":2.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122745","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}
Pub Date : 2026-03-15Epub Date: 2026-01-19DOI: 10.1016/j.poly.2026.117976
Fisayo Rachael Jegede , Saira Nayab , Minyoung Yoon , Gaeun Lee , Hyosun Lee , Sang-Ho Lee
A series of Co(II) and Cu(II) complexes supported by N,N′-bidentate ligands derived from aminomethylpyridine and aminomethylquinoline were synthesized and characterized. The ligands 2-(piperidin-1-ylmethyl)pyridine (LA), 4-(pyridin-2-yl)methyl)morpholine (LB), 2-(piperidin-1-ylmethyl)quinoline (LC), and 4-(quinolin-2-yl)methyl)morpholine (LD) reacted with [CoCl2·6H2O] or [CuCl2·2H2O] in a 1:1 M ratio to yield the corresponding dichloro complexes, formulated as [LnMX2] (where Ln = LA–LD; M = Co, Cu). X-ray diffraction analysis revealed that all [LnCoCl2] complexes (Ln = LA–LC) adopt distorted tetrahedral geometries. In contrast, the copper complexes displayed ligand-dependent geometries: [LCCuCl2] is distorted square-planar, while LB afforded dimeric [{CuCl(LB)}2(μ-Cl)2] species with distorted square-pyramidal copper centers. The ring-opening polymerization of rac-lactide was efficiently catalyzed by the in-situ-generated [LnM(OiPr)2] species (Ln = LA–LD; M = Co, Cu) upon treatment with LiOiPr. Catalytic activity was observed at both 0 °C and 25 °C, producing poly(lactide) (PLA) with pronounced heterotacticity. High monomer conversions were achieved; however, the resulting polymers exhibited moderately broad dispersities (PDIs = 1.22–1.38) and relatively low molecular weights, indicative of a moderate degree of polymerization control.
以氨基甲基吡啶和氨基甲基喹啉为原料合成了一系列以N,N '双齿配体负载的Co(II)和Cu(II)配合物,并对其进行了表征。配体2-(哌啶-1-基甲基)吡啶(LA)、4-(吡啶-2-基甲基)啉(LB)、2-(哌啶-1-基甲基)喹啉(LC)和4-(哌啶-1-基甲基)啉(LD)与[CoCl2·6H2O]或[CuCl2·2H2O]以1:1的M比反应生成相应的二氯配合物[LnMX2] (Ln = LA - LD; M = Co, Cu)。x射线衍射分析表明,所有[LnCoCl2]配合物(Ln = LA-LC)均为畸变四面体。相反,铜配合物表现出与配体相关的几何形状:[LCCuCl2]是扭曲的方形平面,而LB是具有扭曲的方形锥体铜中心的二聚体[{CuCl(LB)}2(μ-Cl)2]。在LiOiPr处理下,原位生成的[LnM(OiPr)2]物质(Ln = LA-LD; M = Co, Cu)有效地催化了racc -丙交酯的开环聚合。在0℃和25℃下均观察到催化活性,生成具有明显杂性的聚丙交酯(PLA)。单体转化率高;然而,所得到的聚合物具有中等宽的分散度(pdi = 1.22-1.38)和相对较低的分子量,表明聚合控制程度适中。
{"title":"Structural diversity of cobalt(II) and copper(II) complexes with aminomethylpyridine/quinoline derivatives: application in rac-lactide polymerization","authors":"Fisayo Rachael Jegede , Saira Nayab , Minyoung Yoon , Gaeun Lee , Hyosun Lee , Sang-Ho Lee","doi":"10.1016/j.poly.2026.117976","DOIUrl":"10.1016/j.poly.2026.117976","url":null,"abstract":"<div><div>A series of Co(II) and Cu(II) complexes supported by <em>N</em>,<em>N</em>′-bidentate ligands derived from aminomethylpyridine and aminomethylquinoline were synthesized and characterized. The ligands 2-(piperidin-1-ylmethyl)pyridine (<strong>L</strong><sub><strong>A</strong></sub>), 4-(pyridin-2-yl)methyl)morpholine (<strong>L</strong><sub><strong>B</strong></sub>), 2-(piperidin-1-ylmethyl)quinoline (<strong>L</strong><sub><strong>C</strong></sub>), and 4-(quinolin-2-yl)methyl)morpholine (<strong>L</strong><sub><strong>D</strong></sub>) reacted with [CoCl<sub>2</sub>·6H<sub>2</sub>O] or [CuCl<sub>2</sub>·2H<sub>2</sub>O] in a 1:1 M ratio to yield the corresponding dichloro complexes, formulated as <strong>[L</strong><sub><strong>n</strong></sub><strong>MX</strong><sub><strong>2</strong></sub><strong>]</strong> (where L<sub>n</sub> = <strong>L</strong><sub><strong>A</strong></sub><strong>–L</strong><sub><strong>D</strong></sub>; M = Co, Cu). X-ray diffraction analysis revealed that all <strong>[L</strong><sub><strong>n</strong></sub><strong>CoCl</strong><sub><strong>2</strong></sub><strong>]</strong> complexes (L<sub>n</sub> = L<sub>A</sub>–L<sub>C</sub>) adopt distorted tetrahedral geometries. In contrast, the copper complexes displayed ligand-dependent geometries: <strong>[L</strong><sub><strong>C</strong></sub><strong>CuCl</strong><sub><strong>2</strong></sub><strong>]</strong> is distorted square-planar, while L<sub>B</sub> afforded dimeric <strong>[{CuCl(L</strong><sub><strong>B</strong></sub><strong>)}</strong><sub><strong>2</strong></sub><strong>(μ-Cl)</strong><sub><strong>2</strong></sub><strong>]</strong> species with distorted square-pyramidal copper centers. The ring-opening polymerization of <em>rac</em>-lactide was efficiently catalyzed by the <em>in-situ</em>-generated <strong>[L</strong><sub><strong>n</strong></sub><strong>M(O</strong><sup><strong><em>i</em></strong></sup><strong>Pr)</strong><sub><strong>2</strong></sub><strong>]</strong> species (L<sub>n</sub> = L<sub>A</sub>–L<sub>D</sub>; M = Co, Cu) upon treatment with LiO<sup><em>i</em></sup>Pr. Catalytic activity was observed at both 0 °C and 25 °C, producing poly(lactide) (PLA) with pronounced heterotacticity. High monomer conversions were achieved; however, the resulting polymers exhibited moderately broad dispersities (PDIs = 1.22–1.38) and relatively low molecular weights, indicative of a moderate degree of polymerization control.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"288 ","pages":"Article 117976"},"PeriodicalIF":2.6,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081189","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}
Pub Date : 2026-03-15Epub Date: 2026-01-19DOI: 10.1016/j.poly.2026.117966
Jing Wei , Zi-Rui Liu , Jian Zhu , Xi-Xi Wang , Zhi-Ying Wang , Xiao-Wei Fan , Yu-Hui Tan , Chao Shi , Yun-Zhi Tang
In recent years, organic-inorganic hybrid lead-free materials have become a promising platform for preparing various stimuli-responsive materials with excellent optoelectronic properties. Here, we synthetise a zero-dimensional zinc-based hybrid, [3,3-difluorocyclobutylammonium]2ZnCl4 ([DFCBA]2ZnCl4, 1), and thoroughly discuss its various-temperature single-crystal structures, switchable dielectric constant behavior, and optical properties. 1 undergoes reversible structural phase transitions with dielectric switching property characteristics at around 354 K upon heating-cooling cycles. Interestingly, both the crystalline phases exhibit monoclinic structure. At room temperature, the organic cations display partial disordered configurations, while at high temperatures, they become highly ordered. This asymmetric symmetry breaking originates from the reverse temperature transition between disordered and ordered states of the [DFCBA]+ cation, which modulates the material's dielectric response. Optical characterization reveals that [DFCBA]2ZnCl4 possesses a direct band gap of 4.68 eV, with its photoluminescence (PL) spectrum showing a maximum emission peak at 481 nm and a fluorescence lifetime of 7.923 μs. Combining its outstanding dielectric switching properties with unique optical characteristics, this zero-dimensional zinc-based hybrid material demonstrates significant potential for applications in ultraviolet-responsive devices, high-insulation optical coatings, and novel optoelectronic devices.
{"title":"A zero-dimensional zinc-based hybrid showing switchable dielectric constant, inverse symmetry breaking and fluorescence property","authors":"Jing Wei , Zi-Rui Liu , Jian Zhu , Xi-Xi Wang , Zhi-Ying Wang , Xiao-Wei Fan , Yu-Hui Tan , Chao Shi , Yun-Zhi Tang","doi":"10.1016/j.poly.2026.117966","DOIUrl":"10.1016/j.poly.2026.117966","url":null,"abstract":"<div><div>In recent years, organic-inorganic hybrid lead-free materials have become a promising platform for preparing various stimuli-responsive materials with excellent optoelectronic properties. Here, we synthetise a zero-dimensional zinc-based hybrid, [3,3-difluorocyclobutylammonium]<sub>2</sub>ZnCl<sub>4</sub> ([DFCBA]<sub>2</sub>ZnCl<sub>4</sub>, <strong>1</strong>), and thoroughly discuss its various-temperature single-crystal structures, switchable dielectric constant behavior, and optical properties. <strong>1</strong> undergoes reversible structural phase transitions with dielectric switching property characteristics at around 354 K upon heating-cooling cycles. Interestingly, both the crystalline phases exhibit monoclinic structure. At room temperature, the organic cations display partial disordered configurations, while at high temperatures, they become highly ordered. This asymmetric symmetry breaking originates from the reverse temperature transition between disordered and ordered states of the [DFCBA]<sup>+</sup> cation, which modulates the material's dielectric response. Optical characterization reveals that [DFCBA]<sub>2</sub>ZnCl<sub>4</sub> possesses a direct band gap of 4.68 eV, with its photoluminescence (PL) spectrum showing a maximum emission peak at 481 nm and a fluorescence lifetime of 7.923 μs. Combining its outstanding dielectric switching properties with unique optical characteristics, this zero-dimensional zinc-based hybrid material demonstrates significant potential for applications in ultraviolet-responsive devices, high-insulation optical coatings, and novel optoelectronic devices.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"288 ","pages":"Article 117966"},"PeriodicalIF":2.6,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081192","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}
The effective remediation of high-viscosity crude oil remains a pressing challenge due to the limited molecular mobility and inefficient diffusion under ambient conditions. Herein, we report a hierarchically engineered two-dimensional (2-D) heterostructure composed of vertically aligned mesoporous polydopamine-derived carbon (mPDA) layers integrated with Ti3C2Tx MXene nanosheets, constructed via a single-micelle-directed interfacial assembly strategy. This “sandwich-like” configuration not only suppresses MXene restacking and oxidation but also establishes continuous mesoporous nanochannels, enabling efficient light-to-heat conversion and accelerated oil diffusion. Embedded within a compressible cellulose aerogel scaffold, the resultant 2-D mPDA@MXene/COA composite achieves superior photothermal-assisted crude oil remediation, exhibiting an enhanced separation efficiency of 87.2% under sunlight-1.36 times higher than in the dark. The aerogel also delivers an exceptional organic solvent uptake capacity of up to 79.5 g/g (for carbon tetrachloride), strong chemical tolerance in acidic, basic, and saline media, and excellent reusability with >85% retention after 10 cycles. This work provides a scalable and generalizable platform for designing functional mesoporous carbon–MXene heterostructures, offering a promising route toward solar-driven environmental remediation under extreme operating conditions.
{"title":"Engineered 2-D mesoporous carbon/MXene heterostructures for enhanced photothermal crude oil remediation","authors":"Yihan Gao, Chaochao Yang, Kerun Zhu, Yan Ai, Tong Wang, Wei Zhang, Wei Li, Dongyuan Zhao","doi":"10.1016/j.poly.2026.117974","DOIUrl":"10.1016/j.poly.2026.117974","url":null,"abstract":"<div><div>The effective remediation of high-viscosity crude oil remains a pressing challenge due to the limited molecular mobility and inefficient diffusion under ambient conditions. Herein, we report a hierarchically engineered two-dimensional (2-D) heterostructure composed of vertically aligned mesoporous polydopamine-derived carbon (mPDA) layers integrated with Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene nanosheets, constructed <em>via</em> a single-micelle-directed interfacial assembly strategy. This “sandwich-like” configuration not only suppresses MXene restacking and oxidation but also establishes continuous mesoporous nanochannels, enabling efficient light-to-heat conversion and accelerated oil diffusion. Embedded within a compressible cellulose aerogel scaffold, the resultant 2-D mPDA@MXene/COA composite achieves superior photothermal-assisted crude oil remediation, exhibiting an enhanced separation efficiency of 87.2% under sunlight-1.36 times higher than in the dark. The aerogel also delivers an exceptional organic solvent uptake capacity of up to 79.5 g/g (for carbon tetrachloride), strong chemical tolerance in acidic, basic, and saline media, and excellent reusability with >85% retention after 10 cycles. This work provides a scalable and generalizable platform for designing functional mesoporous carbon–MXene heterostructures, offering a promising route toward solar-driven environmental remediation under extreme operating conditions.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"288 ","pages":"Article 117974"},"PeriodicalIF":2.6,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081185","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}
Pub Date : 2026-03-15Epub Date: 2026-01-26DOI: 10.1016/j.poly.2026.117988
Ali Harchani
A new study of the influence of water, acids, and organic solvents on polyoxometalate compounds, has been reported in this work. To study the evolution of the properties more deeply, the calculation was applied to two different compounds, (C6H8N)5[HAs2Mo6O26(H2O)].3H2O (1) and [(C7H7N2)3(NH4)]2[Mo8O26]2.4H2O (2), which were previously elaborated, and their structures were studied by the same author. The obtained results of mixture properties, sorption, adsorption, and solvation properties analysis prove that polyoxometalate compounds are affected differently by water, acids, and organic solvents. In addition, the results proved the high impact of solvents on these types of compounds.
{"title":"A new study of the chemical mixture and solvation properties of Polyoxometalate compounds by using water, acids and organic solvents","authors":"Ali Harchani","doi":"10.1016/j.poly.2026.117988","DOIUrl":"10.1016/j.poly.2026.117988","url":null,"abstract":"<div><div>A new study of the influence of water, acids, and organic solvents on polyoxometalate compounds, has been reported in this work. To study the evolution of the properties more deeply, the calculation was applied to two different compounds, (C<sub>6</sub>H<sub>8</sub>N)<sub>5</sub>[HAs<sub>2</sub>Mo<sub>6</sub>O<sub>26</sub>(H<sub>2</sub>O)].3H<sub>2</sub>O (<strong>1</strong>) and [(C<sub>7</sub>H<sub>7</sub>N<sub>2</sub>)<sub>3</sub>(NH<sub>4</sub>)]<sub>2</sub>[Mo<sub>8</sub>O<sub>26</sub>]<sub>2</sub>.4H<sub>2</sub>O (<strong>2</strong>), which were previously elaborated, and their structures were studied by the same author. The obtained results of mixture properties, sorption, adsorption, and solvation properties analysis prove that polyoxometalate compounds are affected differently by water, acids, and organic solvents. In addition, the results proved the high impact of solvents on these types of compounds.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"288 ","pages":"Article 117988"},"PeriodicalIF":2.6,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081181","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}
Pub Date : 2026-03-15Epub Date: 2026-01-26DOI: 10.1016/j.poly.2026.117987
Kiymet Berkil Akar , Oguz Özbek , Caglar Berkel , Isa Mert Eski , Oguzhan Bebek , Onur Cem Altunoluk
In this study, a new 1,4-anthraquinone derivative molecule (3) was synthesized, and its potential as an ionophore in sensor design, and its influence on pro-inflammatory cell death were investigated. For this purpose, following the synthesis of the molecule, its characterization was carried out by 1H-, 13C-NMR, and FT-IR spectroscopic methods. Subsequently, different sensors were prepared using the synthesized 1,4-anthraquinone molecule as an ionophore. The prepared sensors exhibited selectivity towards Pb2+ ions among different cationic species. The developed Pb2+-selective sensor had a wide linear working range of 1.0 × 10−1–1.0 × 10−6 M, a low detection limit of 4.71 × 10−7 M, a Nernstian response of 26 ± 0.81 mV/decade and also a fast response time of 4 s. Besides, it was stable over a wide pH range (4.0–10.0) without being affected by pH changes. The surface morphologies of the prepared sensors were investigated by scanning electron microscopy (SEM). The sensors, which were produced quite economically, were then successfully applied in the analysis of real samples. Lastly, the novel molecule was found to slightly increase the release of pro-inflammatory proteins (IL-18 and LDH) from ovarian granulosa cells in vitro, indicating its potential as a pro-inflammatory cell death inducer.
{"title":"The synthesis of a new 1,4-anthraquinone derivative molecule: its use as an ionophore in potentiometric sensor design, and its influence on pro-inflammatory cell death of granulosa cells","authors":"Kiymet Berkil Akar , Oguz Özbek , Caglar Berkel , Isa Mert Eski , Oguzhan Bebek , Onur Cem Altunoluk","doi":"10.1016/j.poly.2026.117987","DOIUrl":"10.1016/j.poly.2026.117987","url":null,"abstract":"<div><div>In this study, a new 1,4-anthraquinone derivative molecule <strong>(3)</strong> was synthesized, and its potential as an ionophore in sensor design, and its influence on pro-inflammatory cell death were investigated. For this purpose, following the synthesis of the molecule, its characterization was carried out by <sup>1</sup>H-, <sup>13</sup>C-NMR, and FT-IR spectroscopic methods. Subsequently, different sensors were prepared using the synthesized 1,4-anthraquinone molecule as an ionophore. The prepared sensors exhibited selectivity towards Pb<sup>2+</sup> ions among different cationic species. The developed Pb<sup>2+</sup>-selective sensor had a wide linear working range of 1.0 × 10<sup>−1</sup>–1.0 × 10<sup>−6</sup> M, a low detection limit of 4.71 × 10<sup>−7</sup> M, a Nernstian response of 26 ± 0.81 mV/decade and also a fast response time of 4 s. Besides, it was stable over a wide pH range (4.0–10.0) without being affected by pH changes. The surface morphologies of the prepared sensors were investigated by scanning electron microscopy (SEM). The sensors, which were produced quite economically, were then successfully applied in the analysis of real samples. Lastly, the novel molecule was found to slightly increase the release of pro-inflammatory proteins (IL-18 and LDH) from ovarian granulosa cells <em>in vitro</em>, indicating its potential as a pro-inflammatory cell death inducer.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"288 ","pages":"Article 117987"},"PeriodicalIF":2.6,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081186","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}
Pub Date : 2026-03-15Epub Date: 2026-01-24DOI: 10.1016/j.poly.2026.117983
Robinur Rahman , Subas Rajbangshi , Hikari Kawashima , Masashi Hasegawa , Reo Ohno , Daisuke Hayauchi , Miki Hasegawa , Vladimir N. Nesterov , German E. Pieslinger , Shishir Ghosh
Two rhenium tricarbonyl diimine complexes namely fac-[Re(CO)3(κ2-phen){κ1-(N)-sac}] (1) (phen = 1,10-phenanthroline) and fac-[Re(CO)3(κ2-bpy){κ1-(N)-sac}] (2) (bpy = 2,2′-bipyridine) have been prepared from the reactions of [Re(CO)4(NCMe){κ1-(N)-sac}] (sacH = saccharin) with corresponding diimine. Both complexes are photoluminescent upon UV irradiation, and display phosphorescence (ΦPL = 0.5–2.7%, τ = 0.14–0.05 μs) in solution at room temperature as expected. DFT/TD-DFT calculations, carried out to interrogate their exited-state character, reveal that both absorption and emission are MLCT in nature for both complexes in accordant with the experimental observations. Both complexes have also been found to dissolve in all common organic solvents.
{"title":"Photoluminescent rhenium tricarbonyl diimine complexes bearing a saccharinate ligand","authors":"Robinur Rahman , Subas Rajbangshi , Hikari Kawashima , Masashi Hasegawa , Reo Ohno , Daisuke Hayauchi , Miki Hasegawa , Vladimir N. Nesterov , German E. Pieslinger , Shishir Ghosh","doi":"10.1016/j.poly.2026.117983","DOIUrl":"10.1016/j.poly.2026.117983","url":null,"abstract":"<div><div>Two rhenium tricarbonyl diimine complexes namely <em>fac</em>-[Re(CO)<sub>3</sub>(κ<sup>2</sup>-phen){κ<sup>1</sup>-(N)-sac}] (<strong>1</strong>) (phen = 1,10-phenanthroline) and <em>fac</em>-[Re(CO)<sub>3</sub>(κ<sup>2</sup>-bpy){κ<sup>1</sup>-(<em>N</em>)-sac}] (<strong>2</strong>) (bpy = 2,2′-bipyridine) have been prepared from the reactions of [Re(CO)<sub>4</sub>(NCMe){κ<sup>1</sup>-(<em>N</em>)-sac}] (sacH = saccharin) with corresponding diimine. Both complexes are photoluminescent upon UV irradiation, and display phosphorescence (<em>Φ</em><sub>PL</sub> = 0.5–2.7%, <em>τ</em> = 0.14–0.05 μs) in solution at room temperature as expected. DFT/TD-DFT calculations, carried out to interrogate their exited-state character, reveal that both absorption and emission are MLCT in nature for both complexes in accordant with the experimental observations. Both complexes have also been found to dissolve in all common organic solvents.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"288 ","pages":"Article 117983"},"PeriodicalIF":2.6,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081187","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}