Article
Engineering, Chemical
Qiao Chen, Lidan Deng, Zewei Wu, Fang Wang, Xingmao Jiang
Summary: In this study, Pt-Ga/SBA-15 catalysts were prepared and showed high activity and stability for propane dehydrogenation. The formation of Pt-Ga alloy played an important role in enhancing the catalytic performance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Agricultural Engineering
Oscar Oyola-Rivera, Jiayue He, George W. Huber, James A. Dumesic, Nelson Cardona-Martinez
Summary: This study investigated the catalytic conversion of cellulose to levoglucosenone (LGO) using a combination of dilute sulfuric acid and propylsulfonic acid functionalized SBA-15 (PS-SBA-15) in tetrahydrofuran (THF). The addition of small amounts of liquid acid catalyst such as sulfuric acid was found to complement the use of solid acid catalyst for cellulose conversion, leading to an increase in LGO yield. The main role of the solid Bronsted acid catalyst was to dehydrate the generated levoglucosan (LGA) into LGO, demonstrating a more environmentally friendly approach for LGO production.
BIOMASS & BIOENERGY
(2022)
Article
Energy & Fuels
Pawanpreet Kaur, Harish Kumar Chopra
Summary: In this study, SBA-15 supported benzimidazolium-based ionic liquid was synthesized and characterized. The results showed that the supported ionic liquids exhibited higher efficiency for the adsorption of sulfur compounds and the removal of sulfurous compounds from model fuel and real gasoline samples. Furthermore, the adsorbents showed good reusability.
Article
Chemistry, Applied
Pawanpreet Kaur, Harish Kumar Chopra
Summary: In this study, organosilane-modified benzoxazolium-based ionic liquids were synthesized and immobilized on SBA-15 silica support to form supported ionic liquids (SILs). The structure of SILs was determined using various techniques, and their adsorption abilities were tested in the desulfurization of gasoline samples. The SIL adsorbents showed higher efficiency compared to SBA-15 due to interactions between the supported ionic liquids and thiophene compounds.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Engineering, Chemical
Shuncheng Li, Yan Shao, Huanhao Chen, Xiaolei Fan
Summary: This study demonstrates a technique for ammonia synthesis using nonthermal plasma-enabled mesoporous silica-supported nickel catalysts. The addition of magnesium in SBA-15 was found to enhance the ammonia synthesis rate and energy efficiency.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Applied
Yi Liu, Yuhang Hu, Jiarong Zhang, Jingsheng Zhou, Zhengkun Zhang, Jinglai Zhang, Li Wang
Summary: This study grafted a series of amino-functionalized pyrazolium ionic liquids onto SBA-15 and found that SBA-15-APMPzBr(20) exhibited good catalytic activity and recyclability. Experimental results indicated that the hydroxyl groups in SBA-15 promoted the ring-opening of substrate.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Ya Wang, Caixia Li, Xiaolong Zhang, Shan Li, Weiwei He
Summary: Creating a metal/metal oxide heterojunction can effectively enhance catalytic activity. In this study, WO3/PtRu hybrid nanostructures were fabricated by depositing dendrite PtRu nanoalloys on WO3 nanosheets, and their catalytic activities were comprehensively investigated. The WO3 nanosheets played a critical role in supporting PtRu nanoalloys and facilitating charge transfer, resulting in significantly higher catalytic activity for various reactions. The activity was dependent on the composition of PtRu nanoalloys in different ways.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Nitish Deshpande, Jee-Yee Chen, Takeshi Kobayashi, Eun Hyun Cho, Hannah Pineault, Li -Chiang Lin, Nicholas A. Brunelli
Summary: This study investigates the impact of micropores on the catalytic activity of aminosilica materials. By comparing materials with micropores and materials with negligible micropore volume, it is found that the materials with negligible micropore volume exhibit higher catalytic activity in a range of reactions.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Huafan Li, Tiantian She, Guofeng Chen, Menghua Sun, Libo Niu, Guoyi Bai
Summary: In this study, a stable Pd/NH2-SBA-15 catalyst was prepared using an ammonia evaporation method with amino-functionalized SBA-15 support. This catalyst exhibited excellent catalytic performance and stability in the selective hydrogenation of phenol to produce cyclohexanone, attributed to the enhanced activity of supported Pd nanoparticles by amine functionalization. TEM and XPS results confirmed the strong interaction between Pd particles and the amine-functionalized SBA-15 support, inhibiting particle agglomeration and improving catalyst stability during the reaction process.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Physical
Zahra Rajabi, Mehran Javanbakht, Khadijeh Hooshyari, Mina Adibi, Alireza Badiei
Summary: This research successfully fabricated H3PO4 doped polybenzimidazole/ionic liquid composite membranes for high-temperature fuel cell applications by introducing SBA-15 mesoporous. The addition of PAMAM mesoporous as protectors significantly improved the stability of the composite membranes under elevated temperature conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Mohammed Hachemaoui, Bouhadjar Boukoussa, Issam Ismail, Adel Mokhtar, Inas Taha, Jibran Iqbal, Salih Hacini, Abdelkader Bengueddach, Rachida Hamacha
Summary: This work involves the preparation of mesoporous silica SBA-15 functionalized with different amines to stabilize copper nanoparticles for catalytic reduction of dyes. The nature of the functionalized amines significantly influences the size and dispersion of copper nanoparticles, with triamine functionalized SBA-15 showing the best performance. The catalyst Cu@SBA-3 exhibited complete conversion of MB to Leuco-MB within 3 minutes and promising selectivity for the reduction of OG dye.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Applied
Luis M. M. Correia, Mohamed M. A. Soliman, Carlos M. Granadeiro, Salete S. Balula, Luisa M. D. R. S. Martins, Armando J. L. Pombeiro, Elisabete C. B. A. Alegria
Summary: The neutral trichloro[hydrotris(1-pyrazolyl)methane]vanadium(III) C-scorpionate complex was immobilized on amine-functionalized mesoporous silica to form a composite, which showed higher catalytic performance in peroxidative oxidation of benzyl alcohol compared to the analogous homogeneous complex. Various parameters were studied, leading to overall yields of around 60% and high turnover numbers. The composite also exhibited good recyclability and structural stability, making it a promising catalyst for other oxidative reactions.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Obaid F. Aldosari, Mosaed S. Alhumaimess, Mohamed A. Betiha, Emad A. Ahmed, Laila M. Alhaidari, Afnan Altwala, Hassan M. A. Hassan
Summary: This study fabricated a set of aluminum ion-grafted SBA-15 catalysts and examined the impact of the fabrication environment on their physicochemical characteristics. The findings revealed that the mesostructured SBA-15 remained intact after the successful inclusion of Al3+ ions, and the existence of both Bronsted and Lewis acid centers was enhanced. The Al-SBA-15(T-120) catalyst exhibited excellent catalytic performance in the esterification reaction.
Article
Chemistry, Multidisciplinary
Seyyed Mohammad Ebrahimi, Ali Kareem Abbas, Hossein Shahbazi-Alavi, Javad Safaei-Ghomi, Atefeh Bakhtiari, Raheleh Teymuri
Summary: Functionalized SBA-15 has been utilized as an efficient catalyst for the preparation of spiroindolines, offering advantages such as catalyst reusability, low loading, high yields in short reaction times, easy product separation, and the use of ultrasonic irradiation as a valuable and powerful technology. Characterization of the catalyst was conducted using various techniques, including XRD, FE-SEM, TEM, EDX, XPS, FT-IR, N-2 adsorption analysis, TPD, and TGA.
RESEARCH ON CHEMICAL INTERMEDIATES
(2021)
Article
Chemistry, Physical
Zengran Sun, Ellis Hammond-Pereira, Xianghui Zhang, Di Wu, Steven R. Saunders
Summary: Reversible ionic liquids (RevILs) are used to synthesize colloidal gold nanoparticles and can switch between molecular and ionic forms. The RevIL-stabilized gold nanoparticles are deposited in the pores of SBA-15 mesoporous silica, which enhances their thermal stability and catalytic performance in the selective oxidation reaction of benzyl alcohol.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Multidisciplinary
Diogo A. Galico, Alexandros A. Kitos, Jeffrey S. Ovens, Fernando A. Sigoli, Muralee Murugesu
Summary: This study demonstrates the potential use of molecular cluster-aggregates as optical barcodes, providing high-security level optical labeling with precise read-out. The unique methodology explores the effect of composition control on the luminescent properties of nanosized molecular materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Nanoscience & Nanotechnology
Jaciara Bar, Anerise de Barros, Davi H. S. de Camargo, Mariane P. Pereira, Leandro Merces, Flavio Makoto Shimizu, Fernando A. Sigoli, Carlos Cesar Bof Bufon, Italo Odone Mazali
Summary: The study investigates the shape-induced enhanced Raman scattering (SIERS) effect on the action of gold nanorods as a SERS substrate, demonstrating the potential for significantly enhanced Raman signal intensity with V-shaped silicon microchannels which enables attomolar-level detection.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Joao Paulo Vita Damasceno, Lauro Tatsuo Kubota
Summary: This study proposes the possibility of generating surface charges and negative zeta potential on an aqueous graphite dispersion through a redox mechanism. After contact with concentrated ammonia aqueous solution, washing, and exfoliation, a lyophobic dispersion was obtained. Kelvin probe force microscopy indicates that ammonia treatment and exfoliation raise the Fermi level of graphite, suggesting the promotion of redox reactions between ammonia and graphite.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Optics
Airton Germano Bispo, Amanda Justino de Morais, Claudia Manuela Santos Calado, Italo Odone Mazali, Fernando Aparecido Sigoli
Summary: Perovskite materials with their unique characteristics have attracted extensive interest, and the combination of lanthanide-based photoluminescence with perovskite structural and electronic features has allowed for the development of a new class of luminescent materials. This review covers the latest advances in Ln-doped luminescent perovskites, including fundamentals, synthetic routes, challenges and means to overcome them, and applications in various fields.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Deborah A. Lima, Airton G. Bispo Jr, Diogo A. . Galico, Sergio F. N. Coelho, Joao H. Araujo Neto, Javier A. Ellena, Lanousse Petiote, Italo O. Mazali, Fernando A. . Sigoli
Summary: A new ratiometric luminescent temperature probe has been developed by investigating TbIII and EuIII systems in luminescent coordination polymers. The maximum relative thermal sensitivity of the probe can be tuned by changing the ion-ion separation, chain conformation, and excitation channel.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Claudia M. S. Calado, Isis F. Manali, Isabela M. S. Diogenis, Sergio F. N. Coelho, Veronica C. Texeira, Bruno R. de Mesquita, Joeslei L. Oliveira, Fernando A. Sigoli, Marcos V. dos S. Rezende
Summary: Optical spectroscopy and defect disorder of Eu-doped NaYF4 and NaY(1-x)GdxF(4) structures were studied through computational and experimental methods. Atomistic modeling was used to predict intrinsic disorder and Eu doping sites, and calculate crystal field parameters. The experimental emission spectrum of Eu-doped structures was obtained, showing agreement with theoretical predictions of local symmetry.
Article
Nanoscience & Nanotechnology
Gesiane P. Sousa, Anerise de Barros, Flavio M. Shimizu, Fernando A. Sigoli, Italo O. Mazali
Summary: In this work, highly crystalline beta-NaYF4:Yb3+,Er3+@NaYF4:Nd3+@NaYF4 UCNPs capped with an amino-modified nanosized silica shell were coupled with Au nanospheres. The plasmonic-driven dimerization of 4-ATP to DMAB was carried out solely by using the UCNP visible emissions to excite the Au nanoparticle localized surface plasmon resonance band. The reaction was monitored in situ through SERS, and IDMAP method was applied to analyze the SERS spectra acquired during the plasmonic photocatalytic measurements.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Airton G. Bispo-Jr, Diogo A. Galico, Roberto M. Diaz-Rodriguez, Jeffrey S. Ovens, Fernando A. Sigoli, Muralee Murugesu
Summary: By studying two dinuclear Nd-III complexes, the influence of terminal ligands on magnetic and luminescence performance was revealed. One of the Nd-III complexes exhibited lower thermal sensitivity and weaker equatorial crystal field component.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Amanda Justino de Morais, Airton Germano Bispo-Jr, Flavia de Sousa Ferreira, Italo Odone Mazali, Fernando Aparecido Sigoli
Summary: This study investigates the influence of doping concentration, excitation pump power density, and lanthanide-lanthanide separation on the luminescence performance of lanthanide-doped beta-NaGdF4 nanoparticles. The results help to design nanoparticles with versatile emission properties for anti-counterfeiting and energy conversion applications.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Daniel Carneiro Freitas, Italo Odone Mazali, Fernando Aparecido Sigoli, Danielle da Silva Francischini, Marco Aurelio Zezzi Arruda
Summary: This study presents a rapid and environmentally friendly synthesis method for thermodynamically stable silica nanoparticles (SiO2-NPs) using microwave irradiation (MW) compared to conductive heating. The synthesis method is 30 times faster, uses 4 times less reagents, and is approximately 18 times cheaper than conventional synthesis. The synthesized SiO2-NPs were characterized and found to be stable, monodisperse, and amorphous. After adding SiO2-NPs to the soil used for cultivating soybeans, the homeostasis of Cu, Ni, and Zn in soy leaves was evaluated, and the nanoparticles were found to have an impact on the elemental distribution.
Article
Materials Science, Multidisciplinary
Joao Paulo V. Damasceno, Lauro T. Kubota
Summary: This study reports a novel method for the preparation of fullerenol based on the reaction between fullerene C-60 and potassium hydroxide in a polar solvent. Fullerenol radicals are initially formed, followed by air oxidation to promote charge loss and clustering into nanoaggregates. The prepared fullerenol can be stably dispersed in an organic medium, opening up new possibilities for the preparation of stable colloids of carbon nanomaterials.
Article
Biochemistry & Molecular Biology
Diogo Alves Galico, Italo Odone Mazali, Fernando Aparecido Sigoli
Summary: In this study, a polydimethylsiloxane membrane with two emitter groups attached to the structure was synthesized. The membrane can function as a bifunctional temperature and oxygen ratiometric optical probe, analyzing the effects of temperature changes and oxygen levels on the ratio of emission components.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Airton Germano Bispo-Jr, Italo Odone Mazali, Fernando Aparecido Sigoli
Summary: Luminescence thermometry based on Ln(III) systems using the self-calibrated two-band intensity ratiometric method has been studied. Chemically bound [Ln(X-bza)(3)(pdppo)(2)]-PDMS membranes were prepared and used as luminescent temperature probes. The systems showed a thermally dependent excitation channels and achieved ratiometric single-centered Ln(III)-based luminescent temperature probes within a temperature range of 50-320 K.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Airton G. Bispo-Jr, Italo O. Mazali, Fernando A. Sigoli
Summary: The sensitization of Ln complexes through spin-forbidden S-0 -> T transitions has been found to enhance their luminescence, potentially offering opportunities for energy conversion applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Flavia de Sousa Ferreira, Amanda Justino de Morais, Claudia Manuela Santos Calado, Fernando Iikawa, Odilon D. D. Couto Junior, Gabriel Brunet, Muralee Murugesu, Italo O. Mazali, Fernando A. Sigoli
Summary: This research presents a strategy for obtaining optical probes by engineering core@multi-shell nanoparticles containing different crystalline phases. These nanoparticles can emit in various spectral ranges and their optical responses are sensitive to temperature and magnetic field variations, making them suitable for the development of multifunctional materials as temperature and magnetic field optical probes.
Article
Chemistry, Multidisciplinary
Zihan Ma, Lishuang Wang, Tingting Chen, Guangning Wang
Summary: In this study, two kinds of 3D self-doped (N/O) lilac-based and coriander-based porous carbons with high performance have been prepared.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Qin Wang, Yun-Fan Yan, Jiao-Lin Weng, Ying Huang, Fu Yang, Hao-Hui Xie, Fei Tan, Fa-Kun Zheng, Jian-Gang Xu
Summary: Balancing energy and mechanical sensitivities is a challenging issue in the field of energetic materials. This study constructed a 3D energetic metal-organic framework with nitrogen-rich ligand and NO3- anions. The framework demonstrated high stability, energy density, and excellent mechanical sensitivities, making it a potential insensitive energetic material.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Marrium Saeed, Urooj Kamran, Amina Khan, Md Irfanul Haque Siddiqui, Hasan Jamal, Haq Nawaz Bhatti
Summary: In this study, magnesium-aluminum layered double hydroxides (Mg-Al-LDH) were synthesized using an environmentally friendly hydrothermal technique for adsorbing the dye reactive green 5 (RG5). To improve the adsorption capability, composites were prepared by combining Mg-Al-LDH with low-cost Mangifera indica stone biomass (MISB). The results showed that the composites had high adsorption capacities for RG5 dye and could be regenerated.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Xuanlin Zhan, Xiaojie Li, Yunyan Zeng, Siyan Jiang, Chao Pan, Shiyu Pan, Jiaquan Huang, Heqian Zhang, Zhiwei Qin
Summary: This study reports on the potential prospects of natural products derived from the rhizosphere for the development of antibiotics and herbicides, as well as the advancements in cultivating a mutant strain that produces a substantial quantity of lydicamycins, a potent family for herbicide development.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Jie Zhu, Jiangtao Yu, Linhua Zhu, Xiaoxiao Yu, Jixing Liu, Yanhong Chao, Jingzhou Yin, Peiwen Wu, Jian Liu, Wenshuai Zhu
Summary: This study successfully demonstrates the 3D printing of attapulgite monoliths and investigates the influence of thermal treatment on their properties. The thermal treated monoliths show superior catalytic performance at low temperatures.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Yanzhu Ye, Yixiang Ye, Jiannan Cai, Zhongshui Li, Shen Lin
Summary: In this paper, a novel Pt/CoP/C photo-electro synergistic catalyst was successfully synthesized and its performance was investigated. The catalyst exhibited excellent photo-electro catalytic performance, with significantly higher hydrogen production compared to a commercial catalyst. The introduction of cobalt phosphide and the existence of Co3O4 were identified as key factors for enhancing the catalytic activity.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Nurul Hidayah Abu Bakar, Wan Norfazilah Wan Ismail, Hartina Mohd Yusop, Noreen Farzuhana Mohd Zulkifli
Summary: Hydrophobic coatings inspired by the lotus effect have gained popularity for their ability to solve various problems. The sol-gel method, utilizing silica, alumina, and titania, is explored as an environmentally friendly approach to produce water-based hydrophobic coatings. This study focuses on producing water-based hydrophobic coatings for cotton and polyester fabrics using a one-step sol-gel method. The coated fabrics exhibited improved hydrophobic properties, altered surface morphologies, and lower air permeability compared to uncoated fabrics. TEOS-PDMS coating provides a promising approach for enhancing the hydrophobic and surface properties of cotton and polyester fabrics.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Nikita Belko, Hanna Maltanava, Anatol Lugovski, Polina Shabunya, Sviatlana Fatykhava, Evgeny Bondarenko, Pavel Chulkin, Sergey Poznyak, Michael Samtsov
Summary: This study investigates the difference in electrochemical behavior between rhodamine B hydrazide and rhodamine B acylhydrazone, and finds that rhodamine B acylhydrazone exhibits higher reversibility in electrooxidation. These results can be applied for developing new sensors with desired electrochemical properties.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Showket Ahmad Bhat, Mohd Ikram
Summary: In this study, 0-3 particulate multiferroic composites were synthesized and characterized. The composites exhibited excellent ferroelectric and ferromagnetic properties, as well as high piezoelectric strain and magnetoelectric coupling effects.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Carla Gomes, Mariana Costa, Susana M. M. Lopes, Bernardo Albuquerque Nogueira, Rui Fausto, Jose A. Paixao, Teresa M. V. D. e Melo, Luisa M. D. R. S. Martins, Marta Pineiro
Summary: The development of sustainable processes requires the integration of green chemistry principles. In this study, a solvent-free synthesis method was developed to prepare new copper catalysts, which efficiently catalyze cycloaddition reactions under solvent-free mechanochemical conditions. Through this process, the principles of atom economy, reduction of solvents and auxiliaries, design for energy efficiency, and reduction of derivatives and catalysis are combined.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Zhihua Liu, Jinzhe Li, Jianguo Zhou
Summary: This study demonstrates the enhancement of photoelectrochemical activity of BiFeO3 photoelectrodes through ion modification, which increases visible light absorption and active area, leading to improved PEC water splitting performance.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Yisheng Zhang, Wensong Li, Jing Li, Fang Li, Wei Xue, Xinqiang Zhao, Yanji Wang
Summary: Pt/C and SO42-/ZrO2 were used as catalysts for the synthesis of p-aminophenol through the catalytic transfer hydrogenation of nitrobenzene in water with formic acid as the hydrogen source. The optimal Pt loading for PAP selectivity was found to be 1 wt%. The presence of different valence states of Pt affected both the nitrobenzene hydrogenation and formic acid decomposition. Among different solid acid catalysts tested, SO42-/ZrO2 exhibited the highest catalytic activity for p-aminophenol formation. Under the optimized reaction conditions, the conversion of nitrobenzene reached 80.0%, with a selectivity of 47.6% for p-aminophenol.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Pradyota Kumar Behera, Papita Behera, Amlan Swain, Santosh Kumar Sahu, Ajeena Sahoo, Laxmidhar Rout
Summary: We have developed a simple and direct method for the synthesis of diaryl ether using an oxygen bridged bimetallic CuMoO4 nanocatalyst under mild reaction conditions. The catalyst exhibited tolerance towards a wide range of substrates with various functional groups. It is efficient and recyclable. This methodology allows easy access to nitrofen derivatives (herbicides) from unactivated 2,4-dichlorophenol, which are important for agriculture and pharmaceuticals.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Yihua Fu, Yan Zhang, Changwei Hu, Zhishan Su
Summary: The mechanism of the reaction between CO2 and styrene oxide for cyclic carbonate was revealed using density functional theory calculations. The noncatalytic reaction occurred via a concerted mechanism, while in the presence of guanidine and tetrabutylammonium iodide (TBAI) co-catalysts, the epoxide ring-opening by nucleophilic attack of an iodide anion was predicted to be the rate-determining step. Guanidine acted as the H-bond donor to activate styrene oxide, facilitating the reaction with a lower activation barrier.
NEW JOURNAL OF CHEMISTRY
(2024)
Article
Chemistry, Multidisciplinary
Saikat Khamarui, Sirshendu Ghosh
Summary: Copper nanorods (Cu-NRs) exhibit significant plasmonic behavior and can act as efficient catalysts in redox processes and coupling. A benign decarboxylative approach, utilizing localized surface plasmon resonance (LSPR) assisted catalysis with Cu-NRs, has been developed for the production of alkane analogues from alkyl carboxylic acids under visible light. The catalyst shows a broad substrate scope and high functional group tolerance, without the need for an external oxidant or proton source. A plausible mechanism for this recyclable nano-catalyst has also been proposed based on control experiments.
NEW JOURNAL OF CHEMISTRY
(2024)