This research examines the antioxidant and photocatalytic capabilities of diamond-shaped RGO and CNT-doped Fe-based Metal-Organic Frameworks (MOFs), utilizing MIL-53 as the structural framework. A solvothermal method was used for the synthesis of diamond-shaped RGO and CNT-doped MOFs. MOFs structural properties were characterized using FTIR, Raman spectroscopy, FE-SEM, XPS, and p-XRD methods. UV–visible spectroscopy was utilized to analyze the photocatalytic performance and band gap measured as 2.62 eV at 474 nm for RGO-doped MOF and 2.33 eV at 531 nm for CNT-doped MOFs. Amido black 10B (AB10) dye was used to assess the sample’s photocatalytic efficacy in the presence and absence of H2O2. After 40 min of sunshine exposure, the RGO-doped MOFs-H2O2 combination revealed 88.15 % photocatalytic degradation capability, while the CNT-doped MOFs demonstrated 98.42 %. To determine the antioxidant activity of the material, a DPPH test was performed. At 400 μg/ml, RGO-doped MOFs showed an EC50 value of 183.89 and 77.81 % inhibition, while CNT-doped MOFs showed 153.59 and 92 % inhibition.
{"title":"In situ synthesis of RGO and CNT-templated diamond-shaped Fe-based metal-organic frameworks: Exploring their remarkable photocatalytic and antioxidant properties","authors":"Sunil Kumar , Siddharth , Rachna Ahlawat , Gita Rani , Jai Devi , Ajay Kamboj","doi":"10.1016/j.inoche.2024.113589","DOIUrl":"10.1016/j.inoche.2024.113589","url":null,"abstract":"<div><div>This research examines the antioxidant and photocatalytic capabilities of diamond-shaped RGO and CNT-doped Fe-based Metal-Organic Frameworks (MOFs), utilizing MIL-53 as the structural framework. A solvothermal method was used for the synthesis of diamond-shaped RGO and CNT-doped MOFs. MOFs structural properties were characterized using FTIR, Raman spectroscopy, FE-SEM, XPS, and p-XRD methods. UV–visible spectroscopy was utilized to analyze the photocatalytic performance and band gap measured as 2.62 eV at 474 nm for RGO-doped MOF and 2.33 eV at 531 nm for CNT-doped MOFs. Amido black 10B (AB10) dye was used to assess the sample’s photocatalytic efficacy in the presence and absence of H<sub>2</sub>O<sub>2</sub>. After 40 min of sunshine exposure, the RGO-doped MOFs-H<sub>2</sub>O<sub>2</sub> combination revealed 88.15 % photocatalytic degradation capability, while the CNT-doped MOFs demonstrated 98.42 %. To determine the antioxidant activity of the material, a DPPH test was performed. At 400 μg/ml, RGO-doped MOFs showed an EC50 value of 183.89 and 77.81 % inhibition, while CNT-doped MOFs showed 153.59 and 92 % inhibition.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"171 ","pages":"Article 113589"},"PeriodicalIF":4.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706238","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 : 2024-11-19DOI: 10.1016/j.inoche.2024.113579
Jia Du, Xueguo Liu, BingKe Li, Kenan Sun, Kexin Huang, Lixuan Chen, Yiming Wu, Fule Li, Yifan Yang, Yongjie Song
The pursuit of cost-effective and efficient electrocatalysts for water oxidation is crucial for various applications for the storage and conversion of electrochemical energy. Coordination polymers (CPs) have garnered significant interest as potential electrocatalysts, as their catalytic efficiency can be precisely tuned through the design of coordination layers that boast highly accessible and highly reactive metal sites. However, CP-based catalysts face substantial challenges for their application in electrocatalytic oxidation processes because of their limited activity and poor stability. In this study, we employed a mixed-metal approach to develop CoxNi1-x-PDAs incorporating two functional sites specifically designed for facilitating the oxidation of water. The presence of both Co and Ni enhances electron transport through synergistic effects within the CoxNi1-x-PDAs structure. By adjusting the metal ratios in these coordination polymers, an optimized Co3/4Ni1/4-PDA demonstrated impressive performance in water oxidation under alkaline conditions during oxygen evolution reactions, a current density of 10 mA cm−2 was achieved with an overpotential of 322 mV, along with a Tafel slope measured at 87 mV dec−1. This approach involving mixed metals seeks to exploit the synergistic effects among various metal centers, which could result in efficient electrocatalysts for the oxidation of small molecules. Our findings present a promising avenue for utilizing CPs materials within the realm of electrocatalysis.
寻求具有成本效益的高效水氧化电催化剂对于电化学能量的储存和转换等各种应用至关重要。配位聚合物（CP）作为潜在的电催化剂引起了人们的极大兴趣，因为通过设计配位层，可以精确地调整它们的催化效率，而配位层则拥有高易得性和高活性的金属位点。然而，由于活性有限且稳定性差，CP 催化剂在电催化氧化过程中的应用面临着巨大挑战。在本研究中，我们采用了一种混合金属方法来开发 CoxNi1-x-PDAs，其中包含了两个专门用于促进水氧化的功能位点。Co 和 Ni 的存在通过 CoxNi1-x-PDAs 结构中的协同效应增强了电子传输。通过调整这些配位聚合物中的金属比例，经过优化的 Co3/4Ni1/4-PDA 在碱性条件下进行氧进化反应时，在水氧化过程中表现出令人印象深刻的性能，电流密度达到 10 mA cm-2，过电位为 322 mV，测得的塔菲尔斜率为 87 mV dec-1。这种涉及混合金属的方法旨在利用各种金属中心之间的协同效应，从而产生高效的小分子氧化电催化剂。我们的研究结果为在电催化领域利用氯化石蜡材料提供了一条前景广阔的途径。
{"title":"Bimetallic coordination polymers synthesized from pyrazine dicarboxylic acid serve as efficient electrocatalysts for enhancing the oxygen evolution reaction","authors":"Jia Du, Xueguo Liu, BingKe Li, Kenan Sun, Kexin Huang, Lixuan Chen, Yiming Wu, Fule Li, Yifan Yang, Yongjie Song","doi":"10.1016/j.inoche.2024.113579","DOIUrl":"10.1016/j.inoche.2024.113579","url":null,"abstract":"<div><div>The pursuit of cost-effective and efficient electrocatalysts for water oxidation is crucial for various applications for the storage and conversion of electrochemical energy. Coordination polymers (CPs) have garnered significant interest as potential electrocatalysts, as their catalytic efficiency can be precisely tuned through the design of coordination layers that boast highly accessible and highly reactive metal sites. However, CP-based catalysts face substantial challenges for their application in electrocatalytic oxidation processes because of their limited activity and poor stability. In this study, we employed a mixed-metal approach to develop Co<sub>x</sub>Ni<sub>1-x</sub>-PDAs incorporating two functional sites specifically designed for facilitating the oxidation of water. The presence of both Co and Ni enhances electron transport through synergistic effects within the Co<sub>x</sub>N<sub>i1-x</sub>-PDAs structure. By adjusting the metal ratios in these coordination polymers, an optimized Co<sub>3/4</sub>Ni<sub>1/4</sub>-PDA demonstrated impressive performance in water oxidation under alkaline conditions during oxygen evolution reactions, a current density of 10 mA cm<sup>−2</sup> was achieved with an overpotential of 322 mV, along with a Tafel slope measured at 87 mV dec<sup>−1</sup>. This approach involving mixed metals seeks to exploit the synergistic effects among various metal centers, which could result in efficient electrocatalysts for the oxidation of small molecules. Our findings present a promising avenue for utilizing CPs materials within the realm of electrocatalysis.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"171 ","pages":"Article 113579"},"PeriodicalIF":4.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706236","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 : 2024-11-19DOI: 10.1016/j.inoche.2024.113568
Leila Rakhsha , Saeed Hasani , Amir Seifoddini , Mohammad Taghi Rezvan , Vahid Ramezani
This research focuses on optimizing critical process parameters in cobalt ferrite nanoparticles doped with Zn2+ and Dy3+, synthesized using the co-precipitation method. Moreover, the combined effects of Zn2+ and Dy3+ content, OH concentration, calcination time and temperature, on the structural and magnetic properties of the synthesized nanoparticles were investigated. An L25 orthogonal Taguchi array was employed to design the required experiments and analyze these effects. Experimental results revealed a crystallite size ranging from 11 to 75 nm and saturation magnetization from 44.9 to 78.4 emu/g. Following the analysis of the experimental data, it has been established that the calcination temperature can be the predominant factor influencing both the crystallite size and saturation magnetization. Furthermore, the optimized sample identified through the Taguchi method exhibited the highest saturation magnetization value, a homogeneous morphology, and uniform particle distribution. These favorable characteristics make it a promising candidate for biomedical applications, where uniformity and homogeneity are important factors to consider. Moreover, the enhanced antibacterial activity of the free-doped sample, attributed to its smaller particle size, underscores the heightened impact of nanoparticles on gram-negative bacteria compared to gram-positive bacteria, likely due to structural variations in cell wall composition.
{"title":"Optimizing co-precipitation parameters to achieve improved properties in CoFe2O4 nanoparticles doped with Zn2+ and Dy3+ using the Taguchi method","authors":"Leila Rakhsha , Saeed Hasani , Amir Seifoddini , Mohammad Taghi Rezvan , Vahid Ramezani","doi":"10.1016/j.inoche.2024.113568","DOIUrl":"10.1016/j.inoche.2024.113568","url":null,"abstract":"<div><div>This research focuses on optimizing critical process parameters in cobalt ferrite nanoparticles doped with Zn<sup>2+</sup> and Dy<sup>3+</sup>, synthesized using the co-precipitation method. Moreover, the combined effects of Zn<sup>2+</sup> and Dy<sup>3+</sup> content, OH concentration, calcination time and temperature, on the structural and magnetic properties of the synthesized nanoparticles were investigated. An L25 orthogonal Taguchi array was employed to design the required experiments and analyze these effects. Experimental results revealed a crystallite size ranging from 11 to 75 nm and saturation magnetization from 44.9 to 78.4 emu/g. Following the analysis of the experimental data, it has been established that the calcination temperature can be the predominant factor influencing both the crystallite size and saturation magnetization. Furthermore, the optimized sample identified through the Taguchi method exhibited the highest saturation magnetization value, a homogeneous morphology, and uniform particle distribution. These favorable characteristics make it a promising candidate for biomedical applications, where uniformity and homogeneity are important factors to consider. Moreover, the enhanced antibacterial activity of the free-doped sample, attributed to its smaller particle size, underscores the heightened impact of nanoparticles on gram-negative bacteria compared to gram-positive bacteria, likely due to structural variations in cell wall composition.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"171 ","pages":"Article 113568"},"PeriodicalIF":4.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706676","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 : 2024-11-17DOI: 10.1016/j.inoche.2024.113565
P. Jayanthi , J. Duraimurugan , Prabhu Sengodan , R. Siranjeevi , F. Mary Anjalin , N. Bhuvaneshwari , I.M. Ashraf , Mohd. Shkir
Improving the energy density of electrochemical supercapacitors requires the urgent development of novel electroactive materials. Metal molybdate-based nanostructures are promising candidates as effective electrode materials for the next generation of energy storage solutions. In the present work, a FeMoO4/r-GO nanocomposite was synthesized via the hydrothermal method and used as anode material for supercapacitor application. The structural, and topographical properties were investigated by XRD, FE-SEM, and TEM analysis. Field Emission Scanning Electron Microscopy (FE-SEM) and Transmission electron microscope (TEM) images of FeMoO4/reduced graphene oxide (r-GO) composites show an irregular, rod-like structure coated with r-GO sheets. The FeMoO4/r-GO nanocomposite electrode material exhibited a remarkable specific capacitance of 240 F/g at the current density of 1 A/g, which is significantly higher than the 167 F/g capacitance of pure FeMoO4. The continued charge–discharge (GCD) (5,000) life cycle performance of FeMoO4/r-GO was the retention and coulombic efficiency of 90 % to 86 % after 10 A/g.
{"title":"Synthesis, and structural characterization of FeMoO4/r-GO nanocomposite as an electrode material for energy storage application","authors":"P. Jayanthi , J. Duraimurugan , Prabhu Sengodan , R. Siranjeevi , F. Mary Anjalin , N. Bhuvaneshwari , I.M. Ashraf , Mohd. Shkir","doi":"10.1016/j.inoche.2024.113565","DOIUrl":"10.1016/j.inoche.2024.113565","url":null,"abstract":"<div><div>Improving the energy density of electrochemical supercapacitors requires the urgent development of novel electroactive materials. Metal molybdate-based nanostructures are promising candidates as effective electrode materials for the next generation of energy storage solutions. In the present work, a FeMoO<sub>4</sub>/r-GO nanocomposite was synthesized via the hydrothermal method and used as anode material for supercapacitor application. The structural, and topographical properties were investigated by XRD, FE-SEM, and TEM analysis. Field Emission Scanning Electron Microscopy (FE-SEM) and Transmission electron microscope (TEM) images of FeMoO<sub>4</sub>/reduced graphene oxide (r-GO) composites show an irregular, rod-like structure coated with r-GO sheets. The FeMoO<sub>4</sub>/r-GO nanocomposite electrode material exhibited a remarkable specific capacitance of 240 F/g at the current density of 1 A/g, which is significantly higher than the 167 F/g capacitance of pure FeMoO<sub>4</sub>. The continued charge–discharge (GCD) (5,000) life cycle performance of FeMoO<sub>4</sub>/r-GO was the retention and coulombic efficiency of 90 % to 86 % after 10 A/g.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"171 ","pages":"Article 113565"},"PeriodicalIF":4.4,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707173","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 : 2024-11-17DOI: 10.1016/j.inoche.2024.113528
Gilsang Hong , Hyojeong Nam , Levie Mweene , Hyunjung Kim
Flotation of goethite, a representative mineral of laterite ore, which is essential source of nickel used in secondary batteries, was conducted using salicylhydroxamic acid as the collector. The presence of ferric ions derived from goethite in the pulp resulted in an increased consumption of the collector during flotation. Following three washing stages, the maximum recovery of 98.5 wt% was achieved with a collector dosage of only 60 % in the absence of a washing stage. The oxalic acid is employed to eliminate ferric ions via precipitation without the requirement for supplementary water, energy, and time-consuming washing stages. The utilization of 40 g⋅t−1 of oxalic acid yielded comparable recovery outcomes to those observed in the three washing stages. Furthermore, theoretical investigations were conducted to determine the collector species influencing goethite flotation with density functional theory. It was observed that compared with that of goethite with non-ionized salicylhydroxamic acid complex, the complexation energy for goethite with ionized salicylhydroxamic acid was lower by 113.9 kJ⋅mol−1, indicating that the optimum adsorption onto the mineral surface strongly depends on ionized salicylhydroxamic acid species. This study presents a potential method for reduction of reagent consumption in the flotation of future complex laterite ore, an acidic soil in which metal ions might be present. Additionally, the theoretical framework elucidates the complexation of collectors to minerals that are challenging to quantify experimentally.
{"title":"Mitigation strategies of salicylhydroxamic acid collector with oxalic acid in goethite flotation","authors":"Gilsang Hong , Hyojeong Nam , Levie Mweene , Hyunjung Kim","doi":"10.1016/j.inoche.2024.113528","DOIUrl":"10.1016/j.inoche.2024.113528","url":null,"abstract":"<div><div>Flotation of goethite, a representative mineral of laterite ore, which is essential source of nickel used in secondary batteries, was conducted using salicylhydroxamic acid as the collector. The presence of ferric ions derived from goethite in the pulp resulted in an increased consumption of the collector during flotation. Following three washing stages, the maximum recovery of 98.5 wt% was achieved with a collector dosage of only 60 % in the absence of a washing stage. The oxalic acid is employed to eliminate ferric ions via precipitation without the requirement for supplementary water, energy, and time-consuming washing stages. The utilization of 40 g⋅t<sup>−1</sup> of oxalic acid yielded comparable recovery outcomes to those observed in the three washing stages. Furthermore, theoretical investigations were conducted to determine the collector species influencing goethite flotation with density functional theory. It was observed that compared with that of goethite with non-ionized salicylhydroxamic acid complex, the complexation energy for goethite with ionized salicylhydroxamic acid was lower by 113.9 kJ⋅mol<sup>−1</sup>, indicating that the optimum adsorption onto the mineral surface strongly depends on ionized salicylhydroxamic acid species. This study presents a potential method for reduction of reagent consumption in the flotation of future complex laterite ore, an acidic soil in which metal ions might be present. Additionally, the theoretical framework elucidates the complexation of collectors to minerals that are challenging to quantify experimentally.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"171 ","pages":"Article 113528"},"PeriodicalIF":4.4,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706341","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 : 2024-11-17DOI: 10.1016/j.inoche.2024.113591
D. AnnieCanisius , P. Joselene Suzan Jennifer , M. Joe Raja Ruban , Davis Varghese , M. Gladys Joysi , S. Muthupandi , J. Madhavan , M. Victor Antony Raj
Bismuth vanadate was synthesized using the hydrothermal method, with its monoclinic scheelite phase structure was confirmed by XRD. Its morphology and elemental composition confirmed by HR-SEM and XPS studies. To evaluate its efficiency in glucose sensing, cyclic voltammetry and chronoamperometry studies was used, revealing effective glucose detection with minimal interference. From the cyclic voltammetry result, it is observed that the addition of glucose resulted in a corresponding anodic peak, reflecting the oxidation of glucose. From the Chronoamperometry study, sensitivity was found to be 1.07 mA/mM cm2 for a linear range of 1 mM to 8 mM, and a limit of detection was found to be 0.12 µM. In addition, Supercapacitive performance of bismuth vanadate was also evaluated in NaOH and KOH electrolytes. It shows maximum capacitance of 423.75F/g for NaOH than KOH electrolyte (361.25F/g). Capacitance was calculated from CV and GCD measurements, and cyclic stability test showed 5000 continuous charge–discharge cycles. Thus, monoclinic scheelite bismuth vanadate demonstrates potential for both glucose sensing and supercapacitor applications.
{"title":"Duality application analysis of bismuth vanadate (BiVO4) as non-enzymatic glucose sensor and supercapacitor","authors":"D. AnnieCanisius , P. Joselene Suzan Jennifer , M. Joe Raja Ruban , Davis Varghese , M. Gladys Joysi , S. Muthupandi , J. Madhavan , M. Victor Antony Raj","doi":"10.1016/j.inoche.2024.113591","DOIUrl":"10.1016/j.inoche.2024.113591","url":null,"abstract":"<div><div>Bismuth vanadate was synthesized using the hydrothermal method, with its monoclinic scheelite phase structure was confirmed by XRD. Its morphology and elemental composition confirmed by HR-SEM and XPS studies. To evaluate its efficiency in glucose sensing, cyclic voltammetry and chronoamperometry studies was used, revealing effective glucose detection with minimal interference. From the cyclic voltammetry result, it is observed that the addition of glucose resulted in a corresponding anodic peak, reflecting the oxidation of glucose. From the Chronoamperometry study, sensitivity was found to be 1.07 mA/mM cm<sup>2</sup> for a linear range of 1 mM to 8 mM, and a limit of detection was found to be 0.12 µM. In addition, Supercapacitive performance of bismuth vanadate was also evaluated in NaOH and KOH electrolytes. It shows maximum capacitance of 423.75F/g for NaOH than KOH electrolyte (361.25F/g). Capacitance was calculated from CV and GCD measurements, and cyclic stability test showed 5000 continuous charge–discharge cycles. Thus, monoclinic scheelite bismuth vanadate demonstrates potential for both glucose sensing and supercapacitor applications.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"171 ","pages":"Article 113591"},"PeriodicalIF":4.4,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707355","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 : 2024-11-17DOI: 10.1016/j.inoche.2024.113580
Saira Nayab , Hyosun Lee , Sang-Ho Lee
Highly active tungsten complexes supported by (Z)-1-(((2-hydroxyphenyl)imino)methyl)naphthalen-2-ol (LA) and (Z)-4-chloro-2-(((2-hydroxyphenyl)imino)methyl)phenol (LB) were synthesized and characterized. The ring-opening metathesis polymerization activities were assessed using iBu3Al as the co-initiator at room temperature. A 100% conversion of norbornene to high-molecular-weight polynorbornene (PNB) was obtained within 10 min with tunable cis/trans selectivity of resultant polymer depending on the ligand architecture.
{"title":"Ring-opening metathesis polymerization of Norbornene-derived cyclic olefins using Iminomethyl-hydroxyl-ligated tungsten Complexes: Fast reaction and tunable cis/trans selectivity","authors":"Saira Nayab , Hyosun Lee , Sang-Ho Lee","doi":"10.1016/j.inoche.2024.113580","DOIUrl":"10.1016/j.inoche.2024.113580","url":null,"abstract":"<div><div>Highly active tungsten complexes supported by (<em>Z</em>)-1-(((2-hydroxyphenyl)imino)methyl)naphthalen-2-ol (<strong>L<sub>A</sub></strong>) and (<em>Z</em>)-4-chloro-2-(((2-hydroxyphenyl)imino)methyl)phenol (<strong>L<sub>B</sub></strong>) were synthesized and characterized. The ring-opening metathesis polymerization activities were assessed using <em><sup>i</sup></em>Bu<sub>3</sub>Al as the co-initiator at room temperature. A 100% conversion of norbornene to high-molecular-weight polynorbornene (PNB) was obtained within 10 min with tunable <em>cis</em>/<em>trans</em> selectivity of resultant polymer depending on the ligand architecture.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"171 ","pages":"Article 113580"},"PeriodicalIF":4.4,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706970","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 : 2024-11-17DOI: 10.1016/j.inoche.2024.113593
Bidhu Bhushan Brahma , Riu Riu Wary , Mousumi Narzary , Pranjal Kalita , Zircon Basumatary , Manasi Buzar Baruah
Silver nanoparticles (AgNPs) are successfully developed using Eri Silk Fibroin. Eri Silk Fibroin, extracted from Eri Silk produced by Eri Silkworm (Samia ricini), has been used as a reducing as well as stabilising agent under green protocol. Formation of AgNPs has been confirmed by the absorbance peak about at 450 nm analysed by UV–vis spectroscopy and also supported by the diffraction peaks at 27.83, 32.15, 38.08, and 46.06⁰ recorded through X-ray diffractometer. FTIR determines the alteration of β-sheet at 1220 cm−1 (amide III), revealing the formation of the AgNPs. Further, TEM analyses the spherical shape of AgNPs with an average particle size of 20 nm. Synthesised AgNPs have been studied for antibacterial activity and photocatalytic degradation of dyes. Five different bacteria were chosen to analyse the impact of ESF@AgNPs on their growth kinetics. Moreover, methylene blue (MB) and congo red (CR) are found to be degraded efficiently to 86 and 88 % in 140 min, respectively. Thus, this research reveals a novel method for the synthesis of AgNPs using Eri Silk Fibroin in the line of sustainable development.
{"title":"Eri silk fibroin derived silver nanoparticles for antibacterial and photocatalytic applications","authors":"Bidhu Bhushan Brahma , Riu Riu Wary , Mousumi Narzary , Pranjal Kalita , Zircon Basumatary , Manasi Buzar Baruah","doi":"10.1016/j.inoche.2024.113593","DOIUrl":"10.1016/j.inoche.2024.113593","url":null,"abstract":"<div><div>Silver nanoparticles (AgNPs) are successfully developed using Eri Silk Fibroin. Eri Silk Fibroin, extracted from Eri Silk produced by Eri Silkworm (<em>Samia ricini</em>), has been used as a reducing as well as stabilising agent under green protocol. Formation of AgNPs has been confirmed by the absorbance peak about at 450 nm analysed by UV–vis spectroscopy and also supported by the diffraction peaks at 27.83, 32.15, 38.08, and 46.06⁰ recorded through X-ray diffractometer. FTIR determines the alteration of β-sheet at 1220 cm<sup>−1</sup> (amide III), revealing the formation of the AgNPs. Further, TEM analyses the spherical shape of AgNPs with an average particle size of 20 nm. Synthesised AgNPs have been studied for antibacterial activity and photocatalytic degradation of dyes. Five different bacteria were chosen to analyse the impact of ESF@AgNPs on their growth kinetics. Moreover, methylene blue (MB) and congo red (CR) are found to be degraded efficiently to 86 and 88 % in 140 min, respectively. Thus, this research reveals a novel method for the synthesis of AgNPs using Eri Silk Fibroin in the line of sustainable development.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"171 ","pages":"Article 113593"},"PeriodicalIF":4.4,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706240","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}
This work focusses on the development and characterization of efficient CuI/MnO2 nano catalyst, characterized using XPS, XRD, EDAX, FTIR, FESEM, BET (surface area: 8.01 m2/g, a pore radius: 17.052 Å and a pore volume: 0.011 cm3/g) and TEM techniques. The reactivity of this catalyst was evaluated for the synthesis of biologically active 2-substituted benzimidazoles through condensation of o-phenylenediamine with benzaldehydes. The process features short reaction time, high TON (997.35), green conditions, high yield, easy work-up, good green metrices values such as low E-factor (0.17) and Process mass efficiency (PMI) (1.16) high Reaction mass efficiency (RME) value (91.2 %) and carbon efficiency (CE) (94 %) are good characteristics of the synthesized catalyst.
这项工作的重点是开发和表征高效的 CuI/MnO2 纳米催化剂，并使用 XPS、XRD、EDAX、傅立叶变换红外光谱、FESEM、BET（表面积：8 01 m2/g，孔径：17 052 Å，孔体积：0 011 cm3/g）和 TEM 技术对其进行表征：8.01 m2/g，孔半径：17.052 Å，孔体积：0.011 cm3/g）和 TEM 技术进行表征。在通过邻苯二胺与苯甲醛缩合合成具有生物活性的 2-取代苯并咪唑时，对该催化剂的反应活性进行了评估。该工艺具有反应时间短、吨重高（997.35）、绿色条件、产率高、易于操作、绿色指标值好等特点，如低 E 系数（0.17）和过程质量效率（PMI）（1.16）、高反应质量效率（RME）值（91.2 %）和碳效率（CE）（94 %），这些都是合成催化剂的良好特性。
{"title":"CuI/MnO2 nanocatalysed synthesis of bioactive 2-substituted benzimidazoles","authors":"Nisha , Sahil Kohli , Khushboo Aggarwal , Snigdha Singh , Neera Sharma , Ramesh Chandra","doi":"10.1016/j.inoche.2024.113556","DOIUrl":"10.1016/j.inoche.2024.113556","url":null,"abstract":"<div><div>This work focusses on the development and characterization of efficient CuI/MnO<sub>2</sub> nano catalyst, characterized using XPS, XRD, EDAX, FTIR, FESEM, BET (surface area: 8.01 m<sup>2</sup>/g, a pore radius: 17.052 Å and a pore volume: 0.011 cm<sup>3</sup>/g) and TEM techniques. The reactivity of this catalyst was evaluated for the synthesis of biologically active 2-substituted benzimidazoles through condensation of <em>o</em>-phenylenediamine with benzaldehydes. The process features short reaction time, high TON (997.35), green conditions, high yield, easy work-up, good green metrices values such as low E-factor (0.17) and Process mass efficiency (PMI) (1.16) high Reaction mass efficiency (RME) value (91.2 %) and carbon efficiency (CE) (94 %) are good characteristics of the synthesized catalyst.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"171 ","pages":"Article 113556"},"PeriodicalIF":4.4,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706289","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 : 2024-11-16DOI: 10.1016/j.inoche.2024.113547
Simone Stampatori , Iogann Tolbatov , Stefano Zacchini , Guido Pampaloni , Fabio Marchetti , Nazzareno Re , Lorenzo Biancalana
Metal vinylidenes are key intermediates in the activation of terminal alkynes. Previous studies concerning ruthenium η6-arene complexes showed how the elusive vinylidenes are often transformed into more stable alkoxy(alkyl)carbene complexes upon reaction with alcohols, highlighting their electrophilicity. We reinvestigated the reactivity of terminal alkynes and alcohols with ruthenium(II) η6-arene precursors and we found out new aspects of the formation and the reactivity of the alkoxy(carbene)complexes. First, the reactivity of ruthenium complexes bearing different η6-arene, phosphane, halide co-ligands on the activation process of a series of arylalkynes have been examined. Under optimized conditions, a series of alkoxy(benzyl)carbene complexes of general formula [RuCl{C(OR’)CH2(4-C5H4R)}(PR’’3)(η6-arene)]+ were obtained. Five compounds were isolated in 82–96 % yield and they were characterized by spectroscopic techniques and X-ray diffraction in three cases. Notably, these carbene complexes are the predominant reaction products even in presence of a large molar excess of water in the mixture for short reaction times.
In fact, DFT calculations on a model system showed that the vinylidene intermediate, resulting from the Ru/alkyne interaction, is preferentially attacked by MeOH instead of water. The subsequent formation of carbonyl complexes was assessed in various conditions by IR and NMR and four unprecedented and comparatively rare benzyl carbonyl complexes of general formula [Ru{CH2(4-C6H4R)}(CO)(PPh3)(η6-arene)]+ are reported, including the crystal structure of one example. Next, an unprecedented reactivity study on selected alkoxy(benzyl)carbene complexes was carried out. Joint experimental and computational results indicate that these benzyl carbonyl complexes may actually arise from the reaction of the carbene complexes with water, a reactivity pathway that has never been considered in previous studies on the Ru-mediated hydrolytic cleavage of alkynes.
金属亚乙烯基是活化末端炔烃的关键中间体。以前有关钌 η6-炔络合物的研究表明，难以捉摸的亚乙烯基与醇反应后往往会转化为更稳定的烷氧基（烷基）碳烯络合物，这突出了它们的亲电性。我们重新研究了末端炔烃和醇与钌（II）η6-烯前体的反应性，发现了烷氧基（烷基）碳烯配合物形成和反应性的新方面。首先，我们研究了含有不同η6-烯、膦和卤化物共配体的钌络合物对一系列芳基炔的活化过程的反应性。在优化条件下，得到了一系列通式为[RuCl{C(OR')CH2(4-C5H4R)}(PR''3)(η6-烯)]+的烷氧基（苄基）碳烯配合物。通过光谱技术和 X 射线衍射技术对其中三种化合物进行了表征。值得注意的是，即使在混合物中存在大量摩尔过量的水且反应时间较短的情况下，这些碳烯配合物仍是最主要的反应产物。事实上，对模型体系进行的 DFT 计算表明，Ru/炔相互作用产生的亚乙烯基中间体优先受到 MeOH 而不是水的侵蚀。报告还介绍了四种前所未有且比较罕见的通式为[Ru{CH2(4-C6H4R)}(CO)(PPh3)(η6-arene)]+的苄基羰基复合物，包括其中一个实例的晶体结构。接着，对选定的烷氧基（苄基）碳烯配合物进行了前所未有的反应性研究。实验和计算的联合结果表明，这些苄基羰基络合物实际上可能来自于碳烯络合物与水的反应，而这是以往关于 Ru 介导的炔烃水解裂解的研究中从未考虑过的反应途径。
{"title":"Elucidating the ruthenium-mediated conversion of aryl alkynes to alkoxy(benzyl)carbene and benzyl carbonyl complexes","authors":"Simone Stampatori , Iogann Tolbatov , Stefano Zacchini , Guido Pampaloni , Fabio Marchetti , Nazzareno Re , Lorenzo Biancalana","doi":"10.1016/j.inoche.2024.113547","DOIUrl":"10.1016/j.inoche.2024.113547","url":null,"abstract":"<div><div>Metal vinylidenes are key intermediates in the activation of terminal alkynes. Previous studies concerning ruthenium η<sup>6</sup>-arene complexes showed how the elusive vinylidenes are often transformed into more stable alkoxy(alkyl)carbene complexes upon reaction with alcohols, highlighting their electrophilicity. We reinvestigated the reactivity of terminal alkynes and alcohols with ruthenium(II) η<sup>6</sup>-arene precursors and we found out new aspects of the formation and the reactivity of the alkoxy(carbene)complexes. First, the reactivity of ruthenium complexes bearing different η<sup>6</sup>-arene, phosphane, halide co-ligands on the activation process of a series of arylalkynes have been examined. Under optimized conditions, a series of alkoxy(benzyl)carbene complexes of general formula [RuCl{C(OR’)CH<sub>2</sub>(4-C<sub>5</sub>H<sub>4</sub>R)}(PR’’<sub>3</sub>)(η<sup>6</sup>-arene)]<sup>+</sup> were obtained. Five compounds were isolated in 82–96 % yield and they were characterized by spectroscopic techniques and X-ray diffraction in three cases. Notably, these carbene complexes are the predominant reaction products even in presence of a large molar excess of <em>water</em> in the mixture for short reaction times<em>.</em></div><div>In fact, DFT calculations on a model system showed that the vinylidene intermediate, resulting from the Ru/alkyne interaction, is preferentially attacked by MeOH instead of water. The subsequent formation of carbonyl complexes was assessed in various conditions by IR and NMR and four unprecedented and comparatively rare benzyl carbonyl complexes of general formula [Ru{CH<sub>2</sub>(4-C<sub>6</sub>H<sub>4</sub>R)}(CO)(PPh<sub>3</sub>)(η<sup>6</sup>-arene)]<sup>+</sup> are reported, including the crystal structure of one example. Next, an unprecedented reactivity study on selected alkoxy(benzyl)carbene complexes was carried out. Joint experimental and computational results indicate that these benzyl carbonyl complexes may actually arise from the reaction of the carbene complexes with water, a reactivity pathway that has never been considered in previous studies on the Ru-mediated hydrolytic cleavage of alkynes.</div></div>","PeriodicalId":13609,"journal":{"name":"Inorganic Chemistry Communications","volume":"171 ","pages":"Article 113547"},"PeriodicalIF":4.4,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706343","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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