Polyhedron最新文献

{"title":"Two mercury(II) halide coordination polymers with efficient photoluminescence","authors":"Xi Liu,&nbsp;Yu-Shu Zhu,&nbsp;Si Shu,&nbsp;Kun-Lin Huang","doi":"10.1016/j.poly.2024.117244","DOIUrl":"10.1016/j.poly.2024.117244","url":null,"abstract":"<div><div>Two coordination polymers (CPs), [Hg(Bpbp)X₂]_n (X = Br (<strong>1</strong>), I (<strong>2</strong>), Bpbp = 4,4′-bis(4-pyridyl)-biphenyl), were synthesized via solvothermal synthesis methods, and were further fully characterized by single crystal X-ray diffraction, powder X-ray diffraction, elemental analyses, FT-IR spectroscopy, and thermogravimetric analyses. The two CPs exhibit similar one-dimensional zigzag chain structures constructed by Bpbp ligand connecting Hg(II) cations with halide ions as terminal ligands, while the zigzag chains show different configurations, symmetries and packing modes. The results of photoluminescence experiments and DFT calculations indicate that both the halide anions and conjugated Bpbp ligands show important roles in the emission process of CPs, and halide anions may tune the luminescence properties of CPs.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"264 ","pages":"Article 117244"},"PeriodicalIF":2.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural and synthesis study of eight isostructural coordination polymers formed by 5-sulfoisophthalic acid and lanthanide ions","authors":"Anna Luiza Cravinho Varella,&nbsp;Gabriel Brite Vieira,&nbsp;Filipe Barra de Almeida","doi":"10.1016/j.poly.2024.117243","DOIUrl":"10.1016/j.poly.2024.117243","url":null,"abstract":"<div><div>This work presents the synthesis and structural characterization of eight isostructural 1D coordination polymers formed by the coordination of 5-sulfoisophthalic acid with various lanthanides ions: Ln = <span><math><mrow><mi>C</mi><mi>e</mi><mrow><mfenced><mrow><mi>I</mi><mi>I</mi><mi>I</mi></mrow></mfenced></mrow><mo>,</mo><mspace></mspace><mi>Pr</mi><mrow><mfenced><mrow><mi>I</mi><mi>I</mi><mi>I</mi></mrow></mfenced></mrow><mo>,</mo><mspace></mspace><mi>S</mi><mi>m</mi><mrow><mfenced><mrow><mi>I</mi><mi>I</mi><mi>I</mi></mrow></mfenced></mrow><mo>,</mo><mspace></mspace><mi>G</mi><mi>d</mi><mrow><mfenced><mrow><mi>I</mi><mi>I</mi><mi>I</mi></mrow></mfenced></mrow><mo>,</mo><mspace></mspace><mi>D</mi><mi>y</mi><mrow><mfenced><mrow><mi>I</mi><mi>I</mi><mi>I</mi></mrow></mfenced></mrow><mo>,</mo></mrow></math></span> <span><math><mrow><mi>H</mi><mi>o</mi><mrow><mfenced><mrow><mi>I</mi><mi>I</mi><mi>I</mi></mrow></mfenced></mrow><mo>,</mo><mspace></mspace><mi>E</mi><mi>r</mi><mrow><mo>(</mo><mi>I</mi><mi>I</mi><mi>I</mi><mo>)</mo><mspace></mspace></mrow><mi>a</mi><mi>n</mi><mi>d</mi><mspace></mspace><mi>T</mi><mi>m</mi><mrow><mo>(</mo><mi>I</mi><mi>I</mi><mi>I</mi><mo>)</mo></mrow></mrow></math></span>. The structures were synthetized via a two-step process, wherein a solution of lanthanide ions was added to a mixture of 5-sulfoisophthalic acid and 1,3-bis(4-pyridyl)propane, the latter serving as an auxiliary ligand. This method has proven to be a simpler approach compared to those described in the literature. The compounds were characterized by X-ray single crystal diffraction, FT-IR and Raman spectroscopy, and elemental analysis. Structural analysis revealed a significant correlation between atomic number of the lanthanide ion, unit cell parameters, and space group. On the other hand, the Hirshfeld surface analysis and the two-dimensional fingerprint plot revealed that the set of the intermolecular forces remains unchanged across different lanthanide ion.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"264 ","pages":"Article 117243"},"PeriodicalIF":2.4,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142416254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fortification of cotton fabrics with dithiocarbamate-metal complexes to prepare durable antimicrobial fabrics","authors":"Owolabi M. Bankole ,&nbsp;Gbenga J. Omosebi ,&nbsp;Michael T. Aladejana","doi":"10.1016/j.poly.2024.117239","DOIUrl":"10.1016/j.poly.2024.117239","url":null,"abstract":"<div><div>In this study, a simple and practical method is reported to fortify cotton fabrics with dithiocarbamate (DTC-Ct), dithiocarbamate-Cu (Cu-Ct) and dithiocarbamate-Ni (Ni-Ct) complexes via impregnation process to prepare durable antimicrobial fabrics. FTIR analysis indicates the presence of characteristic peaks corresponding to cellulose functional groups in the fortified fabrics. SEM micrographs illustrate the transition from a closed-packed, smooth surface in untreated cotton to a rough texture enveloped with metal complexes in fortified fabrics. EDX images confirm successful impregnation, with prominent peaks due to C and O in the untreated cotton, while additional signals of S, Cu, and Ni were observed in the fortified samples. TEM images revealed irregular, spherical nanoparticles within fortified cotton, compared with the rough surface of untreated fabrics. The average size of the treated cotton fabric fell within the range of 2.20–7.32, 3.83–28.50, and 2.70–7.32 nm for DTC-Ct, Cu-Ct and Ni-Ct, respectively. Untreated cotton fabric exhibits no inherent antibacterial properties, whereas fortified cotton fabrics demonstrate enhanced antibacterial efficacy against strains including <em>Salmonella typhi</em>, <em>Enterobacter aerogenes</em>, <em>Shigella dysenteriae</em>, and <em>Klebsiella pneumonia</em>, with Ni-Ct-fortified cotton proving most effective. Furthermore, the durability of additive adhesion to cotton fabrics was evaluated through washing tests, revealing robust adherence even after multiple cycles, with sustained antimicrobial inhibition observed for up to five wash cycles.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"264 ","pages":"Article 117239"},"PeriodicalIF":2.4,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, crystal structures, characterization and luminescent thermal stability of Eu(III) and Gd(III) complex","authors":"Yan-mei Sun ,&nbsp;Hua Xiang ,&nbsp;Yong-liang Huang ,&nbsp;Yu Bian ,&nbsp;Fang-shuai Zhang ,&nbsp;Zi-ting Liu ,&nbsp;Bao-li Chen","doi":"10.1016/j.poly.2024.117241","DOIUrl":"10.1016/j.poly.2024.117241","url":null,"abstract":"<div><div>Two new dinuclear lanthanide complexes [Ln₂(Hsal)₃(NO₃)₆]·(C₂H₅N)₃·nH₂O (Ln = Gd, Eu) were synthesized with an aromatic carboxylic acid ligand (salicylate). Both complexes were extensively characterized by various techniques, including elemental analysis, infrared spectroscopy, powder X-ray diffraction, and X-ray single-crystal diffraction. The thermal behavior and photoluminescence properties of lanthanide complexes were investigated. It was found that the two complexes had good thermal stability even after heating at 180 °C for 1 h. Furthermore, the two complexes exhibit a unique luminescent thermal stability.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"264 ","pages":"Article 117241"},"PeriodicalIF":2.4,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling the synthesis of highly efficient cerium-doped zinc nanoferrites anchored over graphitic carbon nitride for enhanced photocatalytic water purification implications","authors":"Sana Ghaffar ,&nbsp;Adeel Ahmed ,&nbsp;Ayesha Amjad ,&nbsp;Rashid Iqbal ,&nbsp;Ayman M. Al-Qaaneh ,&nbsp;Saltanat Aghayeva ,&nbsp;Mounir M. Bekhit ,&nbsp;Muhammad Usman Aslam","doi":"10.1016/j.poly.2024.117240","DOIUrl":"10.1016/j.poly.2024.117240","url":null,"abstract":"<div><div>Over the past several years, the manufacturing and dispersal of naturally occurring dyes from various paint and textile companies have placed aquatic environments at an elevated risk of devastation. To address this pollution of the environment, it is imperative to focus on removing these dyes in order to address environmental pollution. Herein, we used hydrothermal technique to synthesize cerium-doped zinc nanoferrites anchored over graphitic carbon nitride (Ce_0.15Zn_0.85Fe₂O₄/g-CN), a photocatalyst that is both extremely adaptable and exceedingly efficient. The association between the catalytic efficiency and the material properties of the manufactured catalysts was examined with a diverse array of methods of characterization. The photodegradation efficacy of the Ce_0.15Zn_0.85Fe₂O₄/g-CN photocatalyst was examined using the methyl violet (MV) dye. The Ce_0.15Zn_0.85Fe₂O₄/g-CN photocatalyst exhibited an exceptional photodegradation of 97.19 % under solar light in comparison to pure ZnFe₂O₄ (73.81 %) and Ce_0.15Zn_0.85Fe₂O₄ (84.52 %), respectively, under constant conditions of reaction. The Ce_0.15Zn_0.85Fe₂O₄/g-CN photocatalyst’s improvement in photodegradation of the MV dye was attributed to a rise in active sites and an elevation in surface area to 128.67 m²/g as a result of g-CN incorporation in the material and was much greater than ZnFe₂O₄ (76.87 m²/g) and Ce_0.15Zn_0.85Fe₂O₄ (92.08 m²/g). The reaction circumstances were also adjusted to ascertain the impact of multiple variables. Radical trapping agents’ studies were employed to validate reactive oxygen species. The Ce_0.15Zn_0.85Fe₂O₄/g-CN photostability and recycling were assessed by executing four consecutive investigations under predetermined conditions for the reaction. Eventually, this research will yield an environmentally benign and economically viable photocatalyst for efficiently degrading MV dye in water reservoirs.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"264 ","pages":"Article 117240"},"PeriodicalIF":2.4,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A polymeric Co(II) oxalate salt containing pyridinium type cations: Synthesis, structure, spectroscopy, thermal behavior and magnetism","authors":"Ornela B.T. Tchougong ,&nbsp;Carole F.N. Nguemdzi ,&nbsp;Bridget N. Ndosiri ,&nbsp;Ledoux S. Pouamo ,&nbsp;Colince Nde ,&nbsp;Mohammad Azam ,&nbsp;Frédéric Capet ,&nbsp;Michel Foulon ,&nbsp;Justin Nenwa","doi":"10.1016/j.poly.2024.117238","DOIUrl":"10.1016/j.poly.2024.117238","url":null,"abstract":"<div><div>A Co(II) oxalate coordination polymer, (C₇H₁₁N₂)₂[Co(C₂O₄)₂]·5H₂O (<strong>1</strong>) (C₇H₁₁N₂⁺ = 2-amino-4,6-dimethylpyridinium cation), has been synthesized and characterized by elemental and thermal analyses, FT-IR and UV/Vis spectroscopies, powder X-ray diffraction (PXRD), single-crystal X-ray diffraction and variable temperature magnetic susceptibility measurements. Compound <strong>1</strong> is a polymerized organic–inorganic hybrid salt, the asymmetric unit of which consists of one Co(II) ion, one bidentate C₂O₄²⁻ ligand, two halves of bidentate C₂O₄²⁻ ligands, two 2-amino-4,6-dimethylpyridinium C₇H₁₁N₂⁺ cations and five crystal water molecules. Each Co^II center is six-coordinated in a distorted octahedral geometry fulfilled by six oxygen atoms from three chelating C₂O₄²⁻ ligands. The [Co(C₂O₄)₂]²⁻ ions act as complex ligands and efficiently bridge neighboring Co²⁺ ions, forming chains of complex anions linked by hydrogen bonded water molecules. Hydrogen bonding interactions of the type O<img>H∙∙∙O and N<img>H∙∙∙O along with π–π stacking interactions between pyridine rings contribute to the stabilization of the 3D supramolecular framework. Temperature-dependence magnetic moment (<em>µ</em>) collected under zero-field cooled (ZFC) and field-cooled (FC) conditions revealed weak antiferromagnetic ordering at low temperatures.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"264 ","pages":"Article 117238"},"PeriodicalIF":2.4,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Naphthalenedisulfonate-based Cd(II) CPs as fluorescent sensors for turn-on and red-shift sensing of tryptophan","authors":"Fang-Hua Zhao,&nbsp;Shu-Qi Li,&nbsp;Rui Feng,&nbsp;Zhong-Lin Li,&nbsp;Yuan-Chun He","doi":"10.1016/j.poly.2024.117237","DOIUrl":"10.1016/j.poly.2024.117237","url":null,"abstract":"<div><div>Tryptophan (Trp) is one of the essential amino acids in human body, which is important for human health. Therefore, convenient strategies for the detection of Trp are very significant. Coordination polymers (CPs) have presented great importance as fluorescent sensors in recent years. Herein, two Cd(II) CPs were synthesized as fluorescent sensors for turn-on and red-shift sensing of tryptophan, namely, {[Cd(1,4-bbix)₂(1,5-NDS)]·(H₂O)₂}_n (<strong>1</strong>) and {[Cd(bmbp)₂(H₂O)₂]·(1,5NDS)(H₂O)₄}_n (<strong>2</strong>), (1,5-NDS = 1,5-naphthalenedisulfonate, 1,4-bbix = 1,4-bis(benzimidazol-1-yl-methyl)benzene, bmbp = 4,4′-bis(2-methylimidazole-1-yl-methyl)biphenyl). <strong>1</strong> shows a three-dimensional (3D) structure with 6-connected <strong>pcu</strong> topology. <strong>2</strong> shows a 1D chain, which is connected by hydrogen-bonds to form the 3D supramolecular structure. Both CPs can effectively detect Trp via fluorescence enhancement and red-shift in aqueous solution with the limits of detection being 1.11 μM and 0.69 μM for <strong>1</strong> and <strong>2</strong>, respectively. Two CPs also can be applied for the detection of Trp in milk with good sensitivity. The sensing mechanisms toward Trp were investigated via experimental and theoretical calculation methods. The test films were prepared for the visual detection of Trp.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"264 ","pages":"Article 117237"},"PeriodicalIF":2.4,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controlled aggregation of a 1,3-diphosphacyclobutadiene complex in the coordination sphere of Ag(I) and Au(I) ions","authors":"Mehdi Elsayed Moussa ,&nbsp;Eva-Maria Rummel ,&nbsp;Veronika Heinl,&nbsp;Christoph Riesinger,&nbsp;Manfred Scheer","doi":"10.1016/j.poly.2024.117227","DOIUrl":"10.1016/j.poly.2024.117227","url":null,"abstract":"<div><div>Reactions of the 1,3-diphosphete complex [Cp'''Co(η⁴-P₂C₂tBu₂)] (Cp''' = Cp(tBu)₃, <strong>1</strong>) with Ag[Al{OC(CF₃)₃}₄] (Ag[TEF]) and [LAu][TEF] (L = (THT)₂, (THT)PPh₃) were studied under various reaction conditions. Depending on the stoichiometry of the reactants, reaction time and temperature involved, a selective formation of the monomers, [{(Et₂O)Ag}{Cp'''Co(µ,η⁴:η¹:η¹-P₂C₂tBu₂)}][TEF] (<strong>4</strong>) and [Au{Cp'''Co(η⁴:η¹-P₂C₂tBu₂)}₂][TEF] (<strong>6</strong>), the dimer [{(Et₂O)Ag}₂{Cp'''Co(µ,η⁴:η¹:η¹-P₂C₂tBu₂)}]·2[TEF] (<strong>3</strong>), the trimers [Au₃{Cp'''Co(η⁴:η¹:η¹-P₂C₂tBu₂)}₄]·3[TEF] (<strong>7</strong>) and [(η¹-PPh₃)₂Au₃{Cp'''Co(η⁴:η¹:η¹-P₂C₂tBu₂)}₂]·3[TEF] (<strong>8</strong>), and the one-dimensional polymer [Ag{Cp'''Co(η⁴:η¹:η¹-P₂C₂tBu₂)}]_n[TEF]_n (<strong>2</strong>) was realized. DFT calculations provided additional insight into the formation of the polymeric species during the assembling process of <strong>2</strong>, <strong>3</strong> and <strong>4</strong>. All compounds were characterized in the solid state by X-ray crystallography and in solution by multinuclear NMR spectroscopy and mass spectrometry.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"264 ","pages":"Article 117227"},"PeriodicalIF":2.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326375","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}

{"title":"Crystal growth, characterization and sensing studies of a new metal-organic framework of Sr(II) with phenylmalonic acid","authors":"P.B. Anagha,&nbsp;S. Shibu Prasad","doi":"10.1016/j.poly.2024.117231","DOIUrl":"10.1016/j.poly.2024.117231","url":null,"abstract":"<div><div>A new metal-organic framework of Sr(II) with phenylmalonic acid, {[Sr(PMA)(H₂O)].H₂O}_n (SPMA) has been prepared by gel diffusion technique. SXRD data show that the crystal belongs to the orthorhombic space group <em>Pbca</em>. In the crystal structure, the phenylmalonate ligand adopts monodentate, bis-monodentate and bidentate coordination modes with the Sr(II) ions. The Sr-phenylmalonate units extend three dimensionally forming a network structure. Intermolecular hydrogen bonding further stabilizes the crystal system. The compound exhibits strong luminescence emission at 290 nm upon excitation at 240 nm. Sensing property of the title compound towards Fe³⁺ ion is also investigated.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"264 ","pages":"Article 117231"},"PeriodicalIF":2.4,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and characterization of rhenium and Technetium-99 m tricarbonyl and dicarbonyl complexes with quinaldic acid and Arsenic/Phosphorus derivatives","authors":"Charalampos Triantis ,&nbsp;Antonio Shegani ,&nbsp;Aristeidis Chiotellis ,&nbsp;Catherine Raptopoulou ,&nbsp;Vassilis Psycharis ,&nbsp;Maria Pelecanou ,&nbsp;Ioannis Pirmettis ,&nbsp;Minas Papadopoulos","doi":"10.1016/j.poly.2024.117236","DOIUrl":"10.1016/j.poly.2024.117236","url":null,"abstract":"<div><div>The synthesis and characterization of neutral tricarbonyl <em>fac-</em>[Re/^99mTc(quin)(X)(CO)₃] and dicarbonyl <em>cis</em>–<em>trans-</em>[Re/^99mTc(quin)(X)₂(CO)₂] mixed ligand complexes with quinaldic acid (quin) as the bidentate ligand and trimethoxyphosphine [P(OCH₃)₃], tris(hydroxymethyl)-phosphine [P(CH₂OH)₃]_, triphenylphosphine (PPh₃), and triphenylarsine (AsPh₃) as the monodentate ligands (X) is described. The synthesis of the [2 + 1] tricarbonyl complexes proceeds by displacement of the water molecule of the <em>fac</em>-[Re/^99mTc(quin)(H₂O)(CO)₃] by the monodentate ligand. Interestingly, the synthesis of the [2 + 1 + 1] dicarbonyl complexes was achieved only for PPh₃ after replacing the CO group <em>trans</em> to PPh₃ with a second PPh₃ molecule. The latter complex was also obtained by refluxing quinaldic acid with the <em>trans</em>-<em>mer</em>-[Re(PPh₃)₂(Cl)(CO)₃] precursor in toluene. Rhenium complexes were prepared in satisfactory yields and fully characterized. At the technetium-99 m level, complexes were produced in high radiochemical yields and characterized by comparative chromatographic analysis using the analogous rhenium complexes. Complexes have shown varying stability against transchelation by cysteine and histidine in agreement with the decreasing <em>σ</em>-donating capacity of the monodentate ligand (P(OCH₃)₃ &gt; P(CH₂OH)₃ &gt; PPh₃ &gt; AsPh₃. The stable complexes with PPh₃ showed high lipophilicity (LogP 2.90 and 3.10, respectively) due to the lipophilic nature of the monodentate ligands. The <em>σ</em>-donor and <em>π</em>-acceptor capacity of the monodentate ligand strongly influences the formation and stability of the complexes, and these characteristics should be considered before choosing the appropriate ligand for radiopharmaceuticals design.</div></div>","PeriodicalId":20278,"journal":{"name":"Polyhedron","volume":"264 ","pages":"Article 117236"},"PeriodicalIF":2.4,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314525","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}