Research on Chemical Intermediates最新文献

{"title":"Repolymerization-suppressed closed-loop recycling of PET to BHET via metal-free ammonium acetate catalysis","authors":"Bin Shen,&nbsp;Hansong Xu,&nbsp;Haijun Xiao,&nbsp;Zhigang Shen,&nbsp;Jianpeng Ma,&nbsp;Shaodong Wei,&nbsp;Hongjing Zhang,&nbsp;Yaquan Wang,&nbsp;Liping Yang","doi":"10.1007/s11164-025-05690-6","DOIUrl":"10.1007/s11164-025-05690-6","url":null,"abstract":"<div><p>Although metal-based catalysts demonstrate excellent catalytic activity in polyester depolymerization, residual metal ions often induce undesirable repolymerization of depolymerization products, significantly limiting monomer recovery efficiency. To address this technical challenge, this study innovatively developed an environmentally benign glycolysis process for poly(ethylene terephthalate) (PET) using ammonium acetate as a catalyst, achieving an efficient product separation and high-value recovery of all monomer products. Under optimized conditions (200 °C, 3 h), ammonium acetate demonstrated exceptional catalytic performance, achieving a PET conversion rate of 96.3%. This remarkable performance clearly indicates a synergistic effect between the acetate anions and ammonium cations in promoting PET depolymerization. Through precisely controlled gradient vacuum distillation, ethylene glycol (EG, purity &gt; 99%) and bis(2-hydroxyethyl) terephthalate (BHET, purity &gt; 98%, melting point 110 °C) were sequentially recovered with 98% and high yields, respectively. Additionally, the catalyst ammonium acetate decomposed during the reaction and was subsequently removed. The analytical results (HPLC, FTIR, XRD, ¹H NMR, DSC) verified the structural consistency and high purity of the recovered BHET. This strategy not only effectively suppresses the BHET repolymerization side reactions induced by metal residues, but also significantly enhances process economics through a simplified separation workflow. The proposed approach offers an innovative solution for establishing a sustainable \"depolymerization-regeneration\" circular economy system for waste polyester valorization.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 10","pages":"5905 - 5921"},"PeriodicalIF":3.5,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037112","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":"Eco-friendly CuO@SnO₂ photocatalysts for solar hydrogen evolution and CO₂ methanation","authors":"Zarah Alqarni,&nbsp;Nour S. Basudan","doi":"10.1007/s11164-025-05686-2","DOIUrl":"10.1007/s11164-025-05686-2","url":null,"abstract":"<div><p>In this study, CuO nanoparticles (NPs) and CuO@SnO₂ nanocomposite (NC) were synthesized via a green method using <i>Moringa oleifera</i> leaf extract, aiming to develop efficient and sustainable photocatalysts for hydrogen (H₂) production and CO₂ methanation. Comprehensive characterization techniques (FTIR, XRD, SEM, UV–Vis) confirmed the successful formation of nanocomposite with enhanced structural and optical features. The CuO@SnO₂ NC showed a significant bandgap reduction (1.81 eV) compared to CuO NPs (2.14 eV), leading to improved charge separation and light absorption. Photocatalytic H₂ production was systematically investigated under three variables: reaction time, catalyst mass, and temperature. The CuO@SnO₂ NC produced 665 µmol/g of H₂ after 10 h, increasing to 816.34 µmol/g at an optimal mass of 60 mg, and peaking at 722 µmol/g at 75 °C. In CO₂ methanation, the CuO@SnO₂ NC achieved a remarkable 99.7% CO₂ conversion and 99.9% CH₄ selectivity at 400  °C and 5 MPa, outperforming the CuO NPs (88.1% conversion, 95.2% selectivity). These improvements highlight the synergistic interaction between CuO and SnO₂ and demonstrate the potential of biogenic CuO@SnO₂ NC as dual-function photocatalysts for clean energy production and carbon utilization.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 9","pages":"5225 - 5243"},"PeriodicalIF":3.5,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918616","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":"Tetramethyl-dipropylene-triamine-modified triazine immobilized on silica-coated magnetic nanoparticles: an eco-friendly and reusable catalyst for the solvent-free synthesis of 2-amino-4H-chromene derivatives","authors":"Noor Alhuda Abd Basim,&nbsp;Hashim Sheerali,&nbsp;Bashaer Jabar Hussein","doi":"10.1007/s11164-025-05691-5","DOIUrl":"10.1007/s11164-025-05691-5","url":null,"abstract":"<div><p>In this study, an eco-friendly and reusable nanocatalyst was developed by modifying silica-coated magnetic nanoparticles (MNPs) with tetramethyldipropylenetriamine (TM-DPT) and 2,4,6-trichloro-1,3,5-triazine (TCT). The resulting material was characterized using various techniques, including FT-IR, XRD, EDX, FESEM, VSM, and TGA analysis, confirming its successful synthesis and structural integrity. The results indicate that the innovative nanocatalyst, labeled MNPs@TCT/TM-DPT, exhibits uniform size distribution, minimal aggregation, and excellent thermal stability up to 200 °C, while maintaining an intact Fe₃O₄ core and a stable surface coating. The catalytic performance of the nanocatalyst was evaluated in the solvent-free synthesis of 2-amino-4<i>H</i>-chromene derivatives, which are important heterocyclic compounds. The synthesis involved a one-pot reaction of aromatic aldehydes, malononitrile, and enolizable C–H acids under mild conditions, achieving high yields efficiently. In alignment with green chemistry principles, the nanocatalyst demonstrated excellent recoverability using an external magnet, retaining its catalytic activity over six consecutive cycles. Comparative analyses highlighted its high-yield synthesis, eco-friendly conditions, and robust reusability, establishing it as a sustainable and effective catalyst for organic synthesis.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 10","pages":"5625 - 5647"},"PeriodicalIF":3.5,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037320","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":"Correction: Highly efficient photocatalytic production of H2O2 by polyimide/In2S3 heterostructures under visible-light irradiation","authors":"Menglin Wang,&nbsp;Yulong Xiang,&nbsp;Xiaoli Dong,&nbsp;Yu Wang","doi":"10.1007/s11164-025-05688-0","DOIUrl":"10.1007/s11164-025-05688-0","url":null,"abstract":"","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 9","pages":"5311 - 5313"},"PeriodicalIF":3.5,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918612","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":"New heterogeneous Bi17V0.6Nb2.4-xPxO33 fluorite catalysts for the synthesis of benzimidazole derivatives","authors":"Saloua Baddou,&nbsp;Youssef Merroun,&nbsp;Soumya Ferraa,&nbsp;Soukaina Chehab,&nbsp;Rachida Ghailane,&nbsp;Abdelaziz Souizi,&nbsp;Taoufiq Guedira","doi":"10.1007/s11164-025-05693-3","DOIUrl":"10.1007/s11164-025-05693-3","url":null,"abstract":"<div><p>In this study, a new series of Bi₁₇V_0.6Nb_2.4-<i>x</i>P_<i>x</i>O₃₃ (0 ≤ <i>x</i> ≤ 1.2) solid solutions were synthesized via a solid-state route using Bi₂O₃, Nb₂O₅, V₂O₅, and (NH₄)₂HPO₄. X-ray diffraction confirmed their crystallization in a face-centered cubic structure (Fm3̅m), with lattice parameters decreasing progressively from 5.5146 to 5.5042 Å as phosphorus content increased. The materials were fully characterized using FTIR, SEM–EDX, and XRD techniques. These compounds were then evaluated as heterogeneous catalysts for the green synthesis of benzimidazole derivatives via the condensation of o-phenylenediamine with various aldehydes. The optimized protocol, employing 15 mol% of catalyst under ethanol reflux, delivered excellent yields (86–95%) in short reaction times. The catalysts showed high stability, easy recyclability over five cycles without loss of activity, and no detectable metal leaching. Green chemistry metrics—such as Atom Economy, E-factor, Reaction Mass Efficiency, and Carbon Efficiency—were calculated and demonstrated the environmental efficiency of the process. This work introduces a sustainable catalytic platform for benzimidazole synthesis and supports the broader integration of eco-friendly materials in organic transformations.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 9","pages":"4849 - 4875"},"PeriodicalIF":3.5,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918502","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 visible-light-sensitive molybdenum ferrite oxide/titanium dioxide nanocomposite photocatalyst","authors":"Md. Afroz Bakht,&nbsp;Abdulrahman I. Alharthi,&nbsp;Mshari Alotaibi,&nbsp;Md Imtiaz Ali","doi":"10.1007/s11164-025-05683-5","DOIUrl":"10.1007/s11164-025-05683-5","url":null,"abstract":"<div><p>In the present work, MoFe₂O₄/TiO₂ nanocomposite as a photocatalyst was developed hydrothermally and as-prepared catalyst was explored to obtain xanthenedione derivatives under optimized conditions. To comprehend MoFe₂O₄/TiO₂ photocatalytic characteristics, we conducted various tests, including FT-IR, XRD, SEM, BET, XPS, TGA, UV–Vis spectrophotometer with an integrating sphere attachment for diffuse reflectance measurements, NH₃-TPD, and CO₂-TPD for acidity/basicity profiling. Inclusion of MoFe₂O₄ into TiO₂ enhanced its optical characteristics by narrowing the band gap and extending its photocatalytic activity into the visible region. XPS analysis reveals chemical bonding between MoFe₂O₄ into TiO₂ and supporting the formation of a heterojunction structure. This synergistic interaction significantly improved the photocatalytic activity of the nanocomposite as compared to individual counterparts. As a photocatalyst, MoFe₂O₄/TiO₂ produced more yield in less time than pure TiO₂. The model compound 3a was efficiently synthesized using MoFe₂O4/TiO₂ as a dual photocatalyst and thermocatalyst under optimized conditions (10 mol% catalyst loading, 40-min irradiation, and 100 mW/cm² visible-light intensity). Xanthedione derivatives yield significantly higher photocatalytic processes in a minimal reaction time as compared to pure TiO₂ and conventional thermal methods, demonstrating ~ 70% reduction in energy consumption. Recyclability studies on materials found MoFe₂O₄/TiO₂ to be stable as photocatalyst properties were consistent up to four runs. This study demonstrated the promising role of visible-light-mediated photocatalysis in bridging green and synthetic organic chemistry.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 9","pages":"5183 - 5210"},"PeriodicalIF":3.5,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918503","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 structure, and electrochemical properties of 5-benzoyl-6-phenyl-pyrimidin-4-one-2-thione compound; voltammetric, spectrophotometric, and molecular docking studies of its interaction with DNA","authors":"Nida Nur Adiyan,&nbsp;Abdulkadir Levent,&nbsp;Şerife Pınar Yalçın,&nbsp;Mehmet Sönmez","doi":"10.1007/s11164-025-05694-2","DOIUrl":"10.1007/s11164-025-05694-2","url":null,"abstract":"<div><p>A novel heterocyclic compound, 5-benzoyl-6-phenyl-pyrimidin-4-one-2-thione (PT), was synthesized for the first time via the cyclocondensation reaction of dibenzoyl acetic acid-N-carboxymethylamide with thiourea. The structure of the compound was characterized using elemental analysis, FT-IR, NMR, X-ray crystallography, and API-ES mass spectrometry. Electrochemical behavior of PT was investigated by cyclic voltammetry on a glassy carbon electrode in an anhydrous medium (0.1 M TBAP), revealing an irreversible cathodic peak at − 0.83 V, indicative of irreversible redox behavior and surface interaction. The interaction between PT and DNA was explored using voltammetric, spectrophotometric, and molecular docking techniques. Differential pulse voltammetry demonstrated a concentration-dependent decrease in the guanine oxidation signal, with a calculated binding free energy of − 6.5 kcal/mol. Spectrophotometric studies further supported the occurrence of a stable PT–DNA complex. Molecular docking revealed a strong binding affinity (− 8.12 kcal/mol), suggesting minor groove and electrostatic interaction modes. The consistency among electrochemical, spectroscopic, and computational findings indicates that PT forms a thermodynamically favorable and specific interaction with DNA. These results provide a foundation for future research on the therapeutic potential of PT and related pyrimidine thione derivatives.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 11","pages":"6593 - 6611"},"PeriodicalIF":3.5,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145296353","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":"Diverse fabrication routes for sulphur-assisted graphitic carbon nitride for contaminant degradation through solar energy","authors":"Asif Hussain,&nbsp;Sadam Ahmed,&nbsp;M. Boota,&nbsp;Pir Bukhsh Khan,&nbsp;Sadia Nazir,&nbsp;Mouna Jeridi,&nbsp;Thamraa Alshahrani,&nbsp;Jianhua Hou","doi":"10.1007/s11164-025-05672-8","DOIUrl":"10.1007/s11164-025-05672-8","url":null,"abstract":"<div><p>Advanced industrialization and globalization have conduct to extensive energy and pollution emergencies, demanding the growth for novel solutions. The release of synthetic dyes as industrial waste has emerged as a global environmental challenge. Large quantities of these dyes are discharged into wastewater each year, posing serious risks due to their toxic and harmful effects. Semiconductor’s materials have emerged as a sustainable and green remediation solution for contaminant degradation. Among various materials, graphitic carbon nitride stands out as an extensively investigated material due to ease fabricated and low cost. In this study, sulphur-incorporated graphitic carbon nitride was fabricated for photocatalytic. In this study, sulphur-assisted graphitic carbon nitride was fabricated for photocatalytic activity. Several fabrication routes were employed, including thermal polymerization, sonication, chemical oxidation, and stepwise thermal polymerization. The material was characterized, and its photocatalytic activity was evaluated for methylene blue dye degradation. The fabricated trials exhibited 2.79 eV, 2.72 eV, 2.82 eV, and 2.56 eV band gap energies, with, 67%, 70%, 75%, and 99.5% pollutants degradation activity, respectively. The trial fabricated with chemically oxidation route attributed higher photocatalytic activity (99.5%, in 50 min) with the reaction rate constant (<i>K</i> = 0.069). The aforementioned results and measurements are supported by UV–vis diffuse reflectance, signifying bandgap energy, XRD for structural and SEM for morphological and EDX for elemental qualitative analysis. The chemical oxidation route shows an effective method for the synthesis of sulphur-assisted graphitic carbon nitride. This novel approach has the potential to advance fabrication techniques within the scientific community.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 9","pages":"5165 - 5182"},"PeriodicalIF":3.5,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918439","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":"In situ growth of Fe-doped TiO2 on flexible Ti mesh for CO oxidation","authors":"Xinyue Tang,&nbsp;Liuduan Wen,&nbsp;Cong Cui,&nbsp;Zizhuang Zhang,&nbsp;Yulian Wang,&nbsp;Yulin Cheng,&nbsp;Baodan Liu","doi":"10.1007/s11164-025-05695-1","DOIUrl":"10.1007/s11164-025-05695-1","url":null,"abstract":"<div><p>In this study, we developed a series of Fe-TiO₂/Ti monolithic catalysts via a scalable multistep synthesis approach. It can be revealed that Fe loading can be precisely controlled by tuning the ion exchange duration, with comprehensive characterization confirming successful Fe incorporation into the TiO₂ lattice. Compared to pristine TiO₂/Ti, the Fe-doped catalysts exhibit significantly increased concentrations of chemisorbed oxygen species and oxygen vacancies, correlating with enhanced catalytic performance. The optimized Fe-TiO₂/Ti catalyst achieves 100% CO conversion at ~ 258 °C, showing a marked improvement over the undoped counterpart. Furthermore, unlike conventional surface modifications of TiO₂ supports, lattice doping provides an intrinsic solution to the persistent challenge of active component detachment, significantly enhancing the material's practical applicability. This work not only provides a facile yet effective ion doping strategy but also advances fundamental understanding of catalyst design, offering new avenues for developing robust catalytic systems.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 10","pages":"5595 - 5608"},"PeriodicalIF":3.5,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037092","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":"Cobalt (II) Schiff base complex immobilized on cobalt ferrite magnetite nanoparticles as a reusable catalyst for the preparation of triazoloquinazolinones","authors":"Ahmad Reza Moosavi-Zare,&nbsp;Zahra Darvishi","doi":"10.1007/s11164-025-05680-8","DOIUrl":"10.1007/s11164-025-05680-8","url":null,"abstract":"<div><p>Cobalt (II) Schiff base complex was placed on the cobalt ferrite magnetite nanoparticles and applied as a heterogeneous and reusable catalyst for the preparation of triazoloquinazolinone derivatives. Cobalt (II) complex by the rearrangement from tetrahedral to square planer structure and then increase the coordination number of cobalt can be accelerate the catalyze the condensation reaction of 3-amino-1,2,4-triazole with aromatic aldehyde and dimedone.</p></div>","PeriodicalId":753,"journal":{"name":"Research on Chemical Intermediates","volume":"51 10","pages":"5609 - 5623"},"PeriodicalIF":3.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037382","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}