New Journal of Chemistry最新文献

{"title":"Colletotrikalactones A and B, unusual tricyclic polyketides from mangrove associated fungus Colletotrichum sp. J065†","authors":"Ziqian Zeng, Shujie Jia, Yang Jin, Peishan Gu, Jing Yang, Zhaolin Chen, Wenbin Deng and Yongbo Xue","doi":"10.1039/D4NJ02991G","DOIUrl":"10.1039/D4NJ02991G","url":null,"abstract":"<p >Two novel polyketides, called colletotrikalactones A and B (<strong>1</strong> and <strong>2</strong>), together with eleven known compounds (<strong>3–13</strong>) were isolated from the culture broth of the mangrove associated fungus <em>Colletotrichum</em> sp. J065. Compounds <strong>1</strong> and <strong>2</strong> featured a rare 5/6/10-fused tricyclic scaffold. The new structures were elucidated through comprehensive spectroscopic analyses and chemical transformation.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216768","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":"Phosphine-free Ru(ii)–CNC pincer complexes with mixed protic- and classical-NHCs in the same molecule for hydrogen production via oxidant-free benzyl alcohol dehydrogenation to benzoic acids†","authors":"Navdeep Srivastava, Rohitash Meena and Amrendra K. Singh","doi":"10.1039/D4NJ03172E","DOIUrl":"10.1039/D4NJ03172E","url":null,"abstract":"<p >Following our recent strategy of using suitably substituted ligand precursors for the synthesis of Ru(<small>II</small>)–CNC pincer complexes [Ru(C<small>^H</small>NC<small>^Me</small>)(PPh<small>₃</small>)<small>₂</small>Cl]Cl (<strong>1</strong> and <strong>2</strong>) with mixed protic- and classical-NHCs in the same molecule, synthesis of new phosphine-free complexes [Ru(C<small>^H</small>NC<small>^Me</small>)(CN<small>^Me</small>)I]PF<small>₆</small> (<strong>3</strong>), [Ru(C<small>^H</small>NC<small>^Me</small>)(CN<small>^i-Pr</small>)I]PF<small>₆</small> (<strong>4</strong>), [Ru(C<small>^H</small>NC<small>^Ad</small>)(CN<small>^Me</small>)I]PF<small>₆</small> (<strong>5</strong>), and [Ru(C<small>^H</small>NC<small>^Ad</small>)(CN<small>^i-Pr</small>)I]PF<small>₆</small> (<strong>6</strong>) has been achieved starting from our in-house made Ru(<small>III</small>)–NHC complexes [Ru(CN<small>^R′</small>)(H<small>₂</small>O)(Cl)<small>₃</small>] (R′ = Me (<strong>P1</strong>), i-Pr (<strong>P2</strong>)) as precursors. This is the first report of phosphine-free Ru-complexes having mixed, protic- and classical-NHC within the same pincer ligand platform. We also note that this synthetic strategy gives racemic mixtures of chiral-at-the-metal complexes from nonchiral precursors. All new complexes have been characterized as racemic mixtures using multinuclear NMR (<small>¹</small>H, <small>³¹</small>P{<small>¹</small>H}, <small>¹³</small>C{<small>¹</small>H} NMR) and high-resolution mass spectrometry (HRMS). The molecular structure of the racemic complex <strong>6</strong> has been determined by single-crystal X-ray diffraction and was found to contain both enantiomers in the same lattice. The catalytic activity of these complexes for oxidant-free, acceptorless dehydrogenation of benzyl alcohols to benzoic acids has been explored, revealing superior activity of complex <strong>4</strong> among the new complexes. Catalyst <strong>4</strong> was then screened for a wide range of substrates, including aliphatic, aromatic, and heteroaromatic benzyl alcohols, to give their corresponding carboxylic acids. Mechanistic investigations help identify some crucial intermediates during the catalytic reaction, and a plausible mechanism has been proposed. A maximum TON of 20 000 has been observed, greater than several previously reported ruthenium catalysts.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216792","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":"Nickel-catalyzed highly efficient chemoselective reduction of azoarenes to hydrazoarenes in water†","authors":"Dawei Gong, Qixuan Li, Yufei Li, Qinghua Yang, Caiyu Gao, Jiku Wang and Lina Zhao","doi":"10.1039/D4NJ03477E","DOIUrl":"10.1039/D4NJ03477E","url":null,"abstract":"<p >A nickel-catalyzed synthesis of hydrazoarenes utilizing NH<small>₃</small>BH<small>₃</small> in water has been developed. This simple synthesis, facilitated by a nickel catalyst, exhibits excellent chemoselectivity, with 22 examples provided without the need for any column chromatography. This strategy introduces a novel nickel-catalyzed reduction system in water, holding promise for industrial applications.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216739","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":"Tunable monovalent cation separation in polymeric carbon nitride membranes via multivalent ions†","authors":"Qinglun Zeng, Lanhua Yi, Yue Ying, Zhiyong Ban, Yongji Yao, Han Xie, Jinlei Yang, Wei Yi, Yebo Lu and Xingzhu Wang","doi":"10.1039/D4NJ03463E","DOIUrl":"10.1039/D4NJ03463E","url":null,"abstract":"<p >Synthetic membrane technology plays an increasingly dominant role in modern industry, boasting remarkable efficiency and low carbon attributes. The ever-growing demand for molecular-level separation necessitates precise structures at the angstrom range with a concomitant low transport resistance, but it still remains a great challenge. Here, we demonstrate an enhanced separation performance towards monovalent cations of two-dimensional (2D) conjugated polymeric carbon nitride (PCN) membranes with angstrom pores, achieved through the strategic incorporation of multivalent ions. Based on the additional ions, the energy barrier of transmembrane transport for individual alkali metal ions could be effectively manipulated. Remarkably, the presence of LaCl<small>₃</small> substantially improves monovalent cation selectivity ratios, improving from 7 to 22 for K<small>⁺</small>/Li<small>⁺</small> in mixtures. More importantly, under an initial concentration gradient, the transport rate of K<small>⁺</small> was further enhanced over 1 kmol m<small>⁻²</small> h<small>⁻¹</small>, primarily attributed to the low ion transfer barrier.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216791","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":"Metal oxide complexes as precursors of sulfide catalysts for HDS of DBT†","authors":"S. L. Amaya-Bustos, G. Alonso-Núñez, J. N. Díaz De León, S. Fuentes and Adriana Echavarría-Isaza","doi":"10.1039/D4NJ03238A","DOIUrl":"10.1039/D4NJ03238A","url":null,"abstract":"<p >Metal oxide complexes based on Ni, Co, Mo, or W were prepared by a hydrothermal method and layered structures, identified by X-ray diffraction (XRD), were obtained. Subsequently, layered materials were thermally treated with air and H<small>₂</small>S/H<small>₂</small> to obtain transition metal sulfide phases. The physicochemical properties of the materials were also determined by chemical analysis by atomic absorption (AA), thermogravimetric (TGA) and differential (DTA) analyses, hydrogen temperature-programmed reduction (H<small>₂</small>-TPR), X-ray photoelectron spectroscopy (XPS), BET surface area measured by nitrogen physisorption, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). All catalysts were tested in the hydrodesulfurization (HDS) reaction of dibenzothiophene (DBT) at 593 K and 5.5 MPa. The results indicated that the activity of the catalysts is hexavalent metal (Mo and W) dependent. The NiCoMoS catalyst showed the highest activity with a DBT conversion of 96%.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216793","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":"Multifunctional B/N/O-co-doped porous spherical carbons to achieve superior capacitive performance with OER activity†","authors":"Manjula Pal, Soumitra Bhowmik and Mahasweta Nandi","doi":"10.1039/D4NJ02857K","DOIUrl":"10.1039/D4NJ02857K","url":null,"abstract":"<p >A series of B, N and O-co-doped samples, <strong>CPFP-3/1</strong>, <strong>CPFP-2/1</strong> and <strong>CPFP-1/1</strong>, with spherical morphological features have been synthesized by carbonization of a polymer obtained by co-condensation of 1,4-phenylenediamine/formaldehyde/phloroglucinol (<strong>PFP</strong>) in the presence of tetraethyl orthosilicate. Boric acid (H<small>₃</small>BO<small>₃</small>) has been used here as an external doping agent to introduce B into the frameworks. To distinguish the properties of the B-doped samples from their undoped counterpart, another sample has been synthesized without the addition of H<small>₃</small>BO<small>₃</small> (<strong>CPFP-1/0</strong>). The materials have been thoroughly characterized by powder X-ray diffraction, nitrogen adsorption/desorption studies, scanning electron microscopy and X-ray photoelectron spectroscopy. All the samples possess a high specific surface area and are predominantly microporous in nature. The electrochemical behaviour of the samples has been studied thoroughly using cyclic voltammetry, galvanostatic charge/discharge studies and impedance spectroscopy in 1 M H<small>₂</small>SO<small>₄</small> electrolyte. The specific capacitances of all the samples are high with the values improving as the number of B-atoms (total heteroatoms) increases from <strong>CPFP-1/0</strong> to <strong>CPFP-3/1</strong>, <strong>CPFP-2/1</strong> and <strong>CPFP-1/1</strong> introducing pseudocapacitive behaviour. <strong>CPFP-1/1</strong> with 1 : 1 doping of the polymer with H<small>₃</small>BO<small>₃</small> is the best performer showing a specific capacitance of 977 F g<small>⁻¹</small> at 1 A g<small>⁻¹</small> and 700 F g<small>⁻¹</small> at 30 A g<small>⁻¹</small> with a high discharge time. It has a notable specific energy density of 110 W h kg<small>⁻¹</small> at a specific power of 449 W kg<small>⁻¹</small> at 1 A g<small>⁻¹</small>, performance-wise bridging the gap between supercapacitors and batteries. Additionally, beyond the potential window of supercapacitance (0–0.9 V), at higher voltage the material shows water splitting activity through the oxygen evolution reaction.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216797","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":"Ice-glue assisted transfer printing of nanocarbon black and its application for electroplating ultrafine copper wires†","authors":"Danting Song, Xuanzhang Li, Chuanyu Zhou, Wenfeng Ying, Ying Ze, Huibin Sun and Wei Huang","doi":"10.1039/D4NJ03267E","DOIUrl":"10.1039/D4NJ03267E","url":null,"abstract":"<p >PDMS-assisted transfer printing has been widely applied in the patterning and device integration process of optoelectronic thin films. However, a traditional transfer method is not suitable for nanomaterials. This is due to the generally low adhesion between nanomaterials and rigid substrates because of the incomplete contact between them caused by the irregular geometric shape of nanomaterials, which is crucial for successful transfer. Here, we introduce a simple and low-cost technique named “ice glue-assisted transfer printing” as a solution to overcome the limitations of the previous method. Benefiting from the ease of reaching the triple point temperature of water, controllable transfer printing of nanomaterials using PDMS stamps can be achieved by utilizing the differences in the mechanical properties of water in different phase states. The transfer characteristics of PDMS stamps to different nanomaterials were investigated, especially in terms of transfer amount and pattern accuracy. The results indicate that, for hydrophobic nanomaterials such as nanocarbon black (<strong>NCB</strong>), ice-assisted transfer printing can transfer the majority of nanomaterials to the target substrate from the PDMS stamp, whereas, for hydrophilic nanomaterials such as silver nanowires, the complete transfer can be achieved. Most importantly, experimental results also show that water amount and post-processing temperature have a significant impact on the accuracy of transfer printing patterns. Based on this, condensation pretreatment was proposed to introduce an ultra-thin ice layer on the target substrate surface, thereby achieving high-precision patterned transfer printing. Finally, shrinkage transfer printing was proposed to improve the pattern accuracy <em>via</em> prestretching the PDMS stamp, which was successfully applied to the preparation of ultrafine metal wires based on the nanoconductive carbon templated area-selective electroplating method.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216828","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 density functional theory study of the water–gas shift reaction catalyzed by a Cr(CO)6 complex†","authors":"Bofeng Zhao, Wencai Peng, Liqiang Qian, Han Li, Sutong Cheng and Jinghan Wei","doi":"10.1039/D4NJ03139C","DOIUrl":"10.1039/D4NJ03139C","url":null,"abstract":"<p >The mechanism of the water–gas shift reaction (WGSR) catalyzed by Cr(CO)<small>₆</small> in both gaseous and aqueous phases was analyzed using density functional theory (DFT). The Gibbs free energy of activation for the entire reaction was calculated to be 36.46 kcal mol<small>⁻¹</small> for the gaseous phase and 37.10 kcal mol<small>⁻¹</small> for the aqueous phase. The study showed that the energy barriers along the reaction pathway were slightly higher in the aqueous phase compared to the gaseous phase. The turnover frequency (TOF) of the reaction was calculated using the energy span model (ESM), and it was found to be slightly lower in the aqueous phase (3.83 × 10<small>⁻¹⁵</small> s<small>⁻¹</small>) compared to the gaseous phase (1.13 × 10<small>⁻¹⁴</small> s<small>⁻¹</small>) at a temperature of 298 K. The study also investigated the energy changes along the reaction pathway at different temperatures (300–900 K), showing that the WGSR rate increases with temperature. The changes in the reaction environment and temperature can alter the TOF-determined intermediates (TDIs). This research aims to address the mechanistic gaps of the WGSR in the aqueous phase, providing thorough theoretical guidance for the development of chromium-based catalysts.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216794","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 novel symmetrical mononuclear zinc complex: synthesis, crystal structure, Hirshfeld surface analysis, DFT calculations, and application in a supercapacitor electrode†","authors":"Houria Lakhdari-Idir, Chafia Ait Ramdane-Terbouche, Achour Terbouche, Katia Ait Kaci Azzou, Khaled Ait Ramdane, Thierry Roisnel, Fodil Aoulmi, Amar Manseri and Didier Hauchard","doi":"10.1039/D4NJ02698E","DOIUrl":"10.1039/D4NJ02698E","url":null,"abstract":"<p >The development of supercapacitor electrodes based on metal complexes constitutes an interesting step toward different biomedical applications. In this context of research, a new Zn(DHA)<small>₂</small>(DMSO)<small>₂</small> complex based on dehydroacetic acid (DHA) and dimethyl sulfoxide (DMSO) has been synthesized and structurally characterized. Suitable crystals for X-ray diffraction were collected by slow evaporation at room temperature. Single-crystal X-ray analysis revealed that the zinc ions bind through two carbonyl groups of the DHA ligand, and the titled complex is formed in a 1 : 2 metal–ligand stoichiometric ratio with an octahedral coordination geometry. Detailed Hirshfeld surface analysis and two-dimensional fingerprint plots were used to explore the intermolecular interactions in the material, and they revealed that the most significant contributions to the crystal packing are from H⋯H (45.5%), H⋯O/O⋯H (36.0%) and H⋯C/C⋯H (16.1%). In addition, using the DFT calculation method, the global descriptors are computed from the HOMO–LUMO orbitals, and the molecular reactivity sites are analyzed from an electrostatic potential map. Furthermore, an electrochemical study was carried out to estimate the energy storage capacity performance of the Zn(DHA)<small>₂</small>(DMSO)<small>₂</small>/graphene oxide (GO) hybrid material at a mass ratio of 100:1 which is sufficient for applications in many implantable health systems. The electrochemical results indicate that the Zn(DHA)<small>₂</small>(DMSO)<small>₂</small>/GO modified electrode exhibits excellent pseudo-capacitive behavior, with a specific capacitance of 36.40 F g<small>⁻¹</small> at 0.2 mA g<small>⁻¹</small> and a high specific energy (445 W h kg<small>⁻¹</small>) at a high current (1 mA g<small>⁻¹</small>). Excellent cycling stability with a specific capacitance retention of 105% after 2000 charge–discharge cycles at 10 mA g<small>⁻¹</small> was also observed. In summary, the Zn(DHA)<small>₂</small>(DMSO)<small>₂</small>/GO modified electrode can be explored as a supercapacitor electrode that can be applied in energy storage devices for biomedical electronics dedicated to health monitoring.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216795","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":"Preparation of rod-zinc oxide/agaric derived porous carbon nanocomposites and their application in electrochemical sensing†","authors":"Yancai Li, Mengying Xie, Xianyu Kang, Wenli Hou and Yanmei Chen","doi":"10.1039/D4NJ03116D","DOIUrl":"10.1039/D4NJ03116D","url":null,"abstract":"<p >In this work, agaric derived porous carbon (A-dPC) was obtained through high-temperature pyrolysis of biomass soaked in HNO<small>₃</small> solution as a carbon source, and zinc oxide nanorods (r-ZnO) were synthesized by a hydrothermal method. A-dPC and r-ZnO were combined under ultrasound to form zinc oxide nanorods/agaric derived porous carbon nanocomposites (r-ZnO/A-dPCNs). The A-dPC, r-ZnO and r-ZnO/A-dPCNs were characterized utilizing X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Brunauer–Emmett–Teller (BET). The r-ZnO/A-dPCNs/GCE showed good electrocatalytic activity in the detection of acetaminophen (PA), dopamine (DA) and luteolin. Under the optimal conditions, the sensor is capable of detecting PA and DA contemporaneously, has a wide linear range (0.10 μM–200.0 μM and 0.10 μM–100.0 μM) and low detection limits of 0.033 μM to PA and 0.022 μM to DA and meanwhile, it also can be used to detect luteolin with a wide linear range (0.010 μM–80.0 μM) and low detection limit (0.0012 μM). In addition, the sensor can be applied to detect PA, DA and luteolin in actual samples, and it exhibits good selectivity and stability.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216798","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}