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Coordination chemistry of alkali metals in a modified β-diketiminate ligand scaffold 修饰β-二氯二胺酸配体支架中碱金属的配位化学
IF 2.4 3区 化学
Polyhedron Pub Date : 2025-02-24 DOI: 10.1016/j.poly.2025.117461
Stuart Burnett, Alan R. Kennedy, Catherine E. Weetman
{"title":"Coordination chemistry of alkali metals in a modified β-diketiminate ligand scaffold","authors":"Stuart Burnett,&nbsp;Alan R. Kennedy,&nbsp;Catherine E. Weetman","doi":"10.1016/j.poly.2025.117461","DOIUrl":"10.1016/j.poly.2025.117461","url":null,"abstract":"<div><div>β-diketiminate (or NacNac) ligands are a widely used ligand class in the stabilisation of metal complexes across the periodic table, in part due to the ease of variability of the ligand steric and electronic effects either at the β-carbon atom or the <em>N</em>-Ar group. Functionalisation of the γ-carbon position is not typically observed however and examples of such complexes are scarce in the literature. Herein, we report on the synthesis and characterisation of alkali metal NacNac complexes which contain such γ-carbon functionalisation in the form of a methyl group. Deprotonation of the β-diketimine proligand <sup>Me3Dip</sup>NacNacH <strong>1</strong> (<sup>Me3Dip</sup>NacNacH = (CH<sub>3</sub>)C(C(CH<sub>3</sub>)NDip)<sub>2</sub>H, Dip = 2,6-<em>i</em>Pr<sub>2</sub>-C<sub>6</sub>H<sub>3</sub>) by various alkali metal bases yielded the corresponding alkali metal complexes <sup>Me3Dip</sup>NacNacAM (where AM = Li <strong>2</strong>, Na <strong>3</strong>, K <strong>4</strong>, Rb <strong>5</strong>, Cs <strong>6</strong>) which have been fully characterised by <sup>1</sup>H and <sup>13</sup>C{<sup>1</sup>H} NMR spectroscopy, while <strong>3</strong> and <strong>4</strong> have been structurally characterised by single-crystal X-ray diffraction. The solid-state structures obtained illustrate the varied range of coordination modes accessible to such group 1 metal complexes.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"273 ","pages":"Article 117461"},"PeriodicalIF":2.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and structural studies of 1-naphthyl and mesityl ligand bearing organotellurium(II and IV) derivatives 含有机碲(II和IV)衍生物的1-萘基和甲酰基配体的合成和结构研究
IF 2.4 3区 化学
Polyhedron Pub Date : 2025-02-24 DOI: 10.1016/j.poly.2025.117463
Amit K. Tripathi , Puspendra Singh , Anamika , Jitendra K. Bera , Andrew Duthie , Ray J. Butcher
{"title":"Synthesis and structural studies of 1-naphthyl and mesityl ligand bearing organotellurium(II and IV) derivatives","authors":"Amit K. Tripathi ,&nbsp;Puspendra Singh ,&nbsp;Anamika ,&nbsp;Jitendra K. Bera ,&nbsp;Andrew Duthie ,&nbsp;Ray J. Butcher","doi":"10.1016/j.poly.2025.117463","DOIUrl":"10.1016/j.poly.2025.117463","url":null,"abstract":"<div><div>We report the synthesis and single crystal X-ray studies of air- and moisture-stable unsymmetrical organotellurium(II) and organotellurium(IV) derivatives bearing mesityl and 1-naphthyl ligands. The organotellurium(IV) derivatives, RR’TeCl<sub>2</sub> (<strong>1</strong>) and RR“TeCl<sub>2</sub> (<strong>2</strong>), [R = 2-(4,4′-NO<sub>2</sub>C<sub>6</sub>H<sub>4</sub>CH = NC<sub>6</sub>H<sub>3</sub>-Me), R′ = 1-naphthyl, R″ = mesityl], were prepared by the treatment of RHgCl with R’TeCl<sub>3</sub> and R”TeCl<sub>3</sub> respectively in chloroform solvent at room temperature. The organotellurium(II) derivatives, RR’Te (<strong>3</strong>) and RR“Te (<strong>4</strong>) were prepared by reducing compounds <strong>1</strong> and <strong>2</strong> in dichloromethane:water solvent. Along with these we also developed compound R’(CH<sub>3</sub>COCH<sub>2</sub>)TeCl<sub>2</sub> (<strong>5</strong>) through the treatment of R’TeCl<sub>3</sub> with acetone at room temperature. All five compounds were characterized using <sup>1</sup>H NMR, <sup>13</sup>C{<sup>1</sup>H}-NMR, <sup>125</sup>Te{<sup>1</sup>H}-NMR, IR, ES-MS and UV spectroscopic techniques and elemental analysis. Additionally, compounds <strong>3</strong>, <strong>4</strong> and <strong>5</strong> were confirmed by single-crystal X-ray studies. The crystal packing diagram of <strong>3</strong> shows intermolecular C<img>H∙∙∙O and C<img>H∙∙∙Te interactions that are within the Σ <em>rvdw</em> (H,O) of 2.72 Å and (H,Te) of 3.28 Å for the two atoms, giving rise to 1D supramolecular motifs via self-assembly. The crystal packing of <strong>3</strong> also displays an interesting centrosymmetric dimeric unit via C<img>H∙∙∙O interactions. This synthon is based on reciprocal C<img>H···O H-bonding interactions of the nitro ligand bearing phenyl fragment. Based on Bent’s rule, we also conclude that the sharing of s-character in these molecules is greater through the mesityl ligand than the tolyl, 1-naphthyl and 4-anisyl organic fragments. The order of electronegativity of these organic fragments in these telluroethers will be mesityl &lt; 4-tolyl &lt; 1-naphthyl &lt; 4-anisyl.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"272 ","pages":"Article 117463"},"PeriodicalIF":2.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511818","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
Sodium salt of boron-substituted first keggin-type polyoxometalate; synthesis, crystal structure and investigation of antimicrobial activities 硼取代第一凯金型多金属氧酸钠盐合成、晶体结构及抗菌活性研究
IF 2.4 3区 化学
Polyhedron Pub Date : 2025-02-23 DOI: 10.1016/j.poly.2025.117453
Erdem Beşli , Ferdağ Çolak , Onur Şahin , Selinsu Dikim , Alper Tolga Çolak
{"title":"Sodium salt of boron-substituted first keggin-type polyoxometalate; synthesis, crystal structure and investigation of antimicrobial activities","authors":"Erdem Beşli ,&nbsp;Ferdağ Çolak ,&nbsp;Onur Şahin ,&nbsp;Selinsu Dikim ,&nbsp;Alper Tolga Çolak","doi":"10.1016/j.poly.2025.117453","DOIUrl":"10.1016/j.poly.2025.117453","url":null,"abstract":"<div><div>This study aims to investigate the antimicrobial activity of the boron-containing polyoxometalate (BPOM) <strong>Na<sub>7</sub>[H<sub>1.5</sub>BW<sub>12</sub>O<sub>40</sub>]∙6en</strong> (<strong>1</strong>)<strong>,</strong> synthesized as a single crystal. The structural and thermal properties of this novel BPOM were thoroughly analyzed using FT-IR, TGA, and X-ray diffraction (XRD) techniques. The incorporation of boron into these structures is believed to enhance their antimicrobial properties. The antimicrobial activity of the compound was evaluated against two Gram-positive bacteria (<em>Staphylococcus aureus, Bacillus cereus</em>)<em>,</em> three Gram-negative bacteria (<em>Escherichia coli, Legionella</em> spp.<em>, Legionella pneumophila sg 2</em>–<em>15</em>)<em>,</em> and a yeast (<em>Candida albicans</em>) using disc diffusion and tube dilution (Minimal Inhibition Concentration) methods. The results demonstrated that the synthesized compound exhibited significant antimicrobial activity, particularly against <em>Bacillus cereus</em> (Gram-positive) and <em>Legionella</em> spp. and <em>Legionella pneumophila sg 2</em>–<em>15</em> (Gram-negative).</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"272 ","pages":"Article 117453"},"PeriodicalIF":2.4,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structural characterization and comparative analysis of two crystalline forms of drug cocrystal (S086) by MicroED, XPS, and XAFS 用MicroED、XPS和XAFS对药物共晶(S086)两种晶型进行结构表征和比较分析
IF 2.4 3区 化学
Polyhedron Pub Date : 2025-02-19 DOI: 10.1016/j.poly.2025.117451
Wen-Jie Xu , Jie Yan , Song Li , Duan-Ming Tan , Sheng Hu
{"title":"Structural characterization and comparative analysis of two crystalline forms of drug cocrystal (S086) by MicroED, XPS, and XAFS","authors":"Wen-Jie Xu ,&nbsp;Jie Yan ,&nbsp;Song Li ,&nbsp;Duan-Ming Tan ,&nbsp;Sheng Hu","doi":"10.1016/j.poly.2025.117451","DOIUrl":"10.1016/j.poly.2025.117451","url":null,"abstract":"<div><div>Similar to the world’s first marketed ARNI drug sacubitril/valsartan (LCZ696), S086 is also a drug-drug cocrystal formed by neprilysin inhibitor (NEP) and angiotensin receptor blocker (ARB). ARNI drugs have played an important role in treating hypertension as a new class of antihypertensive drugs. Therefore, understanding the solid-state structure of S086 has become very meaningful. Employing advanced analytical techniques such as MicroED, XPS and XAFS, our comprehensive analysis has elucidated that the two crystalline forms, α and ξ of S086, are cocrystals derived from the synergistic combination of EXP3174, sacubitril, and calcium atoms, mediated by strong interactions. Due to the difficulty in obtaining X-ray single crystal structures, XPS and XAFS analyses, which offer unique insights into material structure, reasonably suggest that the two crystal forms of S086 possess highly similar coordination structures centered around calcium atoms with mixed ligands, but there are still subtle differences. The subtle differences in carboxylate coordination modes between α and ξ are reflected in the recently published linear and nonlinear IR spectroscopic studies of S086.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"271 ","pages":"Article 117451"},"PeriodicalIF":2.4,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453876","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
Improving the onset of oxygen redox reactions by activating surface defects with visible light on a ZnO-based electrode 利用可见光在zno基电极上激活表面缺陷,改善氧氧化还原反应的发生
IF 2.4 3区 化学
Polyhedron Pub Date : 2025-02-18 DOI: 10.1016/j.poly.2025.117450
C.K. Zagal Padilla , Sergio A. Gamboa , B. Campillo , Virginia Gomez-Vidales , A. Álvarez Gallegos
{"title":"Improving the onset of oxygen redox reactions by activating surface defects with visible light on a ZnO-based electrode","authors":"C.K. Zagal Padilla ,&nbsp;Sergio A. Gamboa ,&nbsp;B. Campillo ,&nbsp;Virginia Gomez-Vidales ,&nbsp;A. Álvarez Gallegos","doi":"10.1016/j.poly.2025.117450","DOIUrl":"10.1016/j.poly.2025.117450","url":null,"abstract":"<div><div>This study investigates the influence of photoactivated oxygen vacancies (VO) on the activation of oxygen redox reactions, such as evolution (OER) and reduction (ORR) reactions. The reactions were carried out on the surface of an electrode prepared with ZnO prepared by green synthesis and supported on sterling silver. Structural and surface analyses using X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and electron paramagnetic resonance (EPR) confirmed the presence of oxygen vacancies. Electrochemical analysis performed in an alkaline medium showed that Vo exhibited photoactivation under visible light illumination. This photoactivation process facilitated electron transfer, resulting in the formation of superoxide intermediates <span><math><mrow><msubsup><mrow><mo>(</mo><mi>O</mi></mrow><mrow><mn>2</mn></mrow><mo>-</mo></msubsup><mrow><mo>)</mo></mrow></mrow></math></span>. These intermediates contribute to the generation of singlet oxygen (<sup>1</sup>O<sub>2</sub>), which enhances OER activity and enables the photoexcitation of adsorbed peroxides and singlet oxygen. This process promotes the formation of triplet oxygen (<sup>3</sup>O<sub>2</sub>), which improves the ORR kinetics. The incorporation of Mg into the Zn-O matrix may play an essential role in these processes. These results provide new insights into the design of electrocatalysts using visible-light-activated redox processes for rechargeable batteries and fuel cell applications.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"271 ","pages":"Article 117450"},"PeriodicalIF":2.4,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis, crystal structure reinvestigation and chemical formula redefinition of cesium hydrogen oxalate by single crystal X-ray diffraction, IR spectroscopy, thermal and Hirshfeld surface analysis 利用单晶x射线衍射、红外光谱、热分析和赫希菲尔德表面分析对草酸氢铯的合成、晶体结构和化学式进行重新研究
IF 2.4 3区 化学
Polyhedron Pub Date : 2025-02-15 DOI: 10.1016/j.poly.2025.117449
Hamza Kherfi , Malika Hamadène
{"title":"Synthesis, crystal structure reinvestigation and chemical formula redefinition of cesium hydrogen oxalate by single crystal X-ray diffraction, IR spectroscopy, thermal and Hirshfeld surface analysis","authors":"Hamza Kherfi ,&nbsp;Malika Hamadène","doi":"10.1016/j.poly.2025.117449","DOIUrl":"10.1016/j.poly.2025.117449","url":null,"abstract":"<div><div>In attempt to prepare a bimetallic polymer oxalate with Cr and Cs atoms, colorless single crystals have been isolated and identified as CsHC<sub>2</sub>O<sub>4,</sub> from X-ray powder diffraction which shown the compound to be isotypic with that reported previously by Kholodkovskaya (Space Group <em>P</em>2<sub>1</sub>/<em>c</em>). On the lack of some structural data, its structure has been reinvestigated using new and more crystallographic data. Two independent C atoms and only one H atom are present in the asymmetric unit, with one Cs atom and moreover, the symmetry center is located on the center of the two kinds of C<img>C bonds, allowing to propose the chemical formula Cs<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>)(H<sub>2</sub>C<sub>2</sub>O<sub>4</sub>) (<strong>I</strong>).The structure consists of zigzag files of CsO<sub>11</sub> polyhedra sharing opposite faces via the C<sub>2</sub>O<sub>4</sub><sup>2−</sup> ions and form double layers separated by H<sub>2</sub>C<sub>2</sub>O<sub>4</sub> ligand layers, along [0<!--> <!-->0<!--> <!-->1] direction. The IR spectroscopy study, carried out by comparison with homologous compounds, is in agreement with XRD data. The thermal analysis ATG and DTA performed under different atmospheric conditions, showed different thermal decomposition process for this bidimensional (2D) compound. The Hirshfeld surface analysis and its corresponding 2D fingerprint plots revealed that the major contributors to the crystal packing are Cs⋯O contacts followed by O⋯C, O⋯O, and O⋯H contacts.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"271 ","pages":"Article 117449"},"PeriodicalIF":2.4,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444672","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 µ-nitrido homo-/heteroleptic iron–manganese complexes as promising oxidants 新型微硝基同/异电性铁锰配合物作为有前途的氧化剂
IF 2.4 3区 化学
Polyhedron Pub Date : 2025-02-13 DOI: 10.1016/j.poly.2025.117448
Sergey A. Zdanovich , Elena Yu. Tyulyaeva , Vitaliy S. Sukharev , Mark V. Zaitsev , Svetlana V. Zaitseva
{"title":"Novel µ-nitrido homo-/heteroleptic iron–manganese complexes as promising oxidants","authors":"Sergey A. Zdanovich ,&nbsp;Elena Yu. Tyulyaeva ,&nbsp;Vitaliy S. Sukharev ,&nbsp;Mark V. Zaitsev ,&nbsp;Svetlana V. Zaitseva","doi":"10.1016/j.poly.2025.117448","DOIUrl":"10.1016/j.poly.2025.117448","url":null,"abstract":"<div><div>Binuclear μ-bridged macrocycle dimers have been attracting considerable attention because of their catalytic ability in organic substrates oxidation. This work focuses on the preparation and properties of novel µ-nitrido iron–manganese homo-/heteroleptic complexes bearing porphyrin and phthalocyanine ligands. The compounds are identified and studied using UV, IR, EPR spectroscopy, mass spectrometry, and electrochemistry techniques. Subjecting the complexes to <em><sup>t</sup></em>BuOOH in CH<sub>2</sub>Cl<sub>2</sub> resulted in chemical generation of different high-valence species capable of decomposing β-carotene and peroxide at room temperature. The active reaction intermediates are rather stable to be identified using spectroscopic methods aiming at further establishing the reaction mechanism. The complexes composition is found to affect their redox properties and path of the studied substrate oxidation. The findings contribute to expanding the range of compounds with the controlled oxidizing capability to create active and durable catalysts.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"270 ","pages":"Article 117448"},"PeriodicalIF":2.4,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418947","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
Influence of ligand donation on charge transfer properties of cyanido-bridged binuclear Fe-Ru complexes 配体给予对氰基桥接双核铁钌配合物电荷转移性质的影响
IF 2.4 3区 化学
Polyhedron Pub Date : 2025-02-13 DOI: 10.1016/j.poly.2025.117442
Han Liu , Xiao-Lin Liu , Hao Wang , Yang Liu , Xin-Tao Wu , Tian-Lu Sheng
{"title":"Influence of ligand donation on charge transfer properties of cyanido-bridged binuclear Fe-Ru complexes","authors":"Han Liu ,&nbsp;Xiao-Lin Liu ,&nbsp;Hao Wang ,&nbsp;Yang Liu ,&nbsp;Xin-Tao Wu ,&nbsp;Tian-Lu Sheng","doi":"10.1016/j.poly.2025.117442","DOIUrl":"10.1016/j.poly.2025.117442","url":null,"abstract":"<div><div>To investigate how the electron-donating ability of the ligand influence the metal-to-metal charge transfer (MMCT) in mixed-valence (MV) systems, a series of asymmetric binuclear cyanido-bridged complexes CpMe<sub>x</sub>(dppe)FeCNRu(bimpy)(PPh<sub>3</sub>)(NCCH<sub>3</sub>), <strong>N[PF<sub>6</sub>]<sub>2</sub></strong> (x = 1, 3, 4, 5; N = <strong>1</strong>, <strong>2</strong>, <strong>3</strong>, <strong>4</strong>; CpMe = methylcyclopentadiene; CpMe<sub>3</sub> = 1, 2, 4-trimethyl-cyclopentadiene; CpMe<sub>4</sub> = 1, 2, 3, 4-tetramethyl-cyclopentadienyl; CpMe<sub>5</sub> = 1, 2, 3, 4, 5-pentamethyl-cyclopentadienyl; dppe = 1,2-bis(diphenylphosphino)ethane; bimpy = 2, 6-Bis(benzimidazol-2-yl)pyridine; PPh<sub>3</sub> = triphenylphosphine), along with their one-electron oxidized products <strong>N[PF<sub>6</sub>]<sub>3</sub></strong> were synthesized and well characterized. In these MV systems, significant electronic interactions between the two metal centers were revealed by electrochemistry, crystallography, FTIR, UV–vis-NIR, and supported by the DFT calculations. The results showed that the MM’CT energy from the Ru<sup>II</sup> to the Fe<sup>III</sup> increases as the electron-donating ability of the CpMe<sub>X</sub> ligands was enhanced with the addition of methyl substituents. Meanwhile, all the one-electron oxidized products <strong>N[PF<sub>6</sub>]<sub>3</sub></strong> belong to Class II systems.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"271 ","pages":"Article 117442"},"PeriodicalIF":2.4,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438273","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
Comprehensive study of a novel cobalt(II) complex: Synthesis, X-ray crystal structure, Hirshfeld surface analysis, computational quantum investigations, and molecular docking insights 一种新型钴(II)配合物的综合研究:合成、x射线晶体结构、赫希菲尔德表面分析、计算量子研究和分子对接见解
IF 2.4 3区 化学
Polyhedron Pub Date : 2025-02-13 DOI: 10.1016/j.poly.2025.117445
Yasmina Sabeg , Rim Benali-Cherif , Wahiba Falek , Radhwane Takouachet , Lynda Golea , Muhittin Aygün , Nourredine Benali-Cherif
{"title":"Comprehensive study of a novel cobalt(II) complex: Synthesis, X-ray crystal structure, Hirshfeld surface analysis, computational quantum investigations, and molecular docking insights","authors":"Yasmina Sabeg ,&nbsp;Rim Benali-Cherif ,&nbsp;Wahiba Falek ,&nbsp;Radhwane Takouachet ,&nbsp;Lynda Golea ,&nbsp;Muhittin Aygün ,&nbsp;Nourredine Benali-Cherif","doi":"10.1016/j.poly.2025.117445","DOIUrl":"10.1016/j.poly.2025.117445","url":null,"abstract":"<div><div>The design of metal complexes that combine structural sophistication with biological relevance has become a cornerstone of modern coordination chemistry. In this study, we present the synthesis and comprehensive characterization of a novel cobalt(II) complex, [Co(phen)<sub>2</sub>(η<sup>2</sup>-bz)]·2bzH·NO<sub>3</sub> (<strong>1</strong>), featuring a distorted six-coordinate octahedral geometry, stabilized by two 1,10-phenanthroline and one benzoate ligands. The crystal structure was elucidated using single-crystal X-ray diffraction, revealing a robust supramolecular network strengthened by various non-covalent interactions, including C<img>H⋯O, O<img>H⋯O hydrogen bonds, and π–π stacking between aromatic rings. Density functional theory (DFT) calculations, employing the B3LYP/3-21G basis set, provided further insight into the optimized geometry and electronic properties, with a close match to experimental observations. Hirshfeld surface analysis quantified the intermolecular interactions, and molecular electrostatic potential (MEP) maps highlighted the reactive sites of the complex. Additionally, molecular docking studies demonstrated a strong binding affinity between the cobalt complex and Klebsiella pneumoniae receptors (PDB ID: 6RD3), suggesting potential antibacterial properties. This cobalt complex offers new insights into the structure–activity relationships of transition metal complexes and presents promising avenues for the development of novel therapeutic agents targeting multidrug-resistant bacteria. The findings from this study also pave the way for further exploration of cobalt complexes in catalytic and biomedical applications.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"271 ","pages":"Article 117445"},"PeriodicalIF":2.4,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444674","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
Z-scheme design of hydrothermally synthesized Sm-Fe-doped LaNiO3/g-C3N4 heterostructure photo-catalyst for the efficient elimination of methylene blue & moxifloxacin pollutants 水热合成的sm - fe掺杂LaNiO3/g-C3N4异质结构光催化剂的z方案设计,用于高效消除亚甲基蓝和莫西沙星污染物
IF 2.4 3区 化学
Polyhedron Pub Date : 2025-02-12 DOI: 10.1016/j.poly.2025.117446
Shahid Iqbal , Firdous Bibi , Muhammad Jamshaid , Ambreen Kalsoom , Wedad A. Al-onazi , Mohamed S. Elshikh , Md Rezaul Karim , Ismail Hossain
{"title":"Z-scheme design of hydrothermally synthesized Sm-Fe-doped LaNiO3/g-C3N4 heterostructure photo-catalyst for the efficient elimination of methylene blue & moxifloxacin pollutants","authors":"Shahid Iqbal ,&nbsp;Firdous Bibi ,&nbsp;Muhammad Jamshaid ,&nbsp;Ambreen Kalsoom ,&nbsp;Wedad A. Al-onazi ,&nbsp;Mohamed S. Elshikh ,&nbsp;Md Rezaul Karim ,&nbsp;Ismail Hossain","doi":"10.1016/j.poly.2025.117446","DOIUrl":"10.1016/j.poly.2025.117446","url":null,"abstract":"<div><div>In this current investigation, it deals with the synthesis of a highly effective Z-scheme visible light-driven Sm-Fe-doped LaNiO<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> hetero-structure photocatalyst for the efficient elimination of toxic environmental pollutants from wastewater. Pristine LaNiO<sub>3</sub> nanoparticles (NP), samarium, and iron (Sm-Fe) doped LaNiO<sub>3</sub> NP and their nanohybrid composite Sm-Fe doped LaNiO<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> with 15 % (g-C<sub>3</sub>N<sub>4</sub>) graphitic-carbon-nitride was prepared via facile glycerine-assisted hydrothermal and ultra-sonication approaches. The materials for their physico-chemical properties were characterized using SEM, TEM, P-XRD, FTIR, XPS, BET, I-V, VSM, PL, and UV–visible analysis. The morphological analysis revealed that the g-C<sub>3</sub>N<sub>4</sub> sheets interact and buffer with Sm-Fe-doped LaNiO<sub>3</sub> NP, forming larger, elongated aggregations having highly exposed surfaces, wider particle size distributions and possessing an average particle sizes 22–34 nm. Structural investigation demonstrated the single-phase rhombohedral LaNiO<sub>3</sub> perovskite along with successful Sm and Fe cation doping. The Sm-Fe-doped LaNiO<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> nanohybrid materials exhibited excellent BET surface area (96.7 m<sup>2</sup>/g), a well-porous nature with average pore sizes in the 1.5–2.6 nm range, good saturation magnetization (2.204 <span><math><mo>×</mo></math></span> 10<sup>−3</sup> Ms/emu), boosted electrical conductivity (1.09 <span><math><mo>×</mo></math></span> 10<sup>2</sup> Sm<sup>−1</sup>) and a narrow band gap (2.06 eV), which was credited to the Sm-Fe-doping and the combination of highly conducting g-C<sub>3</sub>N<sub>4</sub> material. It was demonstrated that Sm-Fe-doped LaNiO<sub>3</sub> NP were uniformly dispersed on g-C<sub>3</sub>N<sub>4</sub> nanohybrids, forming an intimate interface with robust interaction between LaNiO<sub>3</sub> and the g-C<sub>3</sub>N<sub>4</sub>, which promoted efficient charge mobility and separation, forming a Z-scheme photocatalytic system. The photo-degradation investigation of the newly synthesized photo-catalyst was tested against methylene blue (MB) dye and moxifloxacin (MOX) drug under solar-light irradiation. The Sm-Fe-doped LaNiO<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> nanohybrid photocatalyst exhibited excellent removal of MB dye (97.8 %) and MOX (96.4 %) in only 55 min. This superb removal proficiency of MB dye and MOX by Sm-Fe-doped LaNiO<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> nanohybrid was attributed to its improved magnetic, good electrical, well-porosity, and excellent optical absorption characteristics, which make the Sm-Fe-doped LaNiO<sub>3</sub>/g-C<sub>3</sub>N<sub>4</sub> nanohybrid as a novel materials for removing toxic environmental pollutants.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"270 ","pages":"Article 117446"},"PeriodicalIF":2.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419057","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}
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