Article
Chemistry, Multidisciplinary
Rui Gao, Zhen Liu, Zeyu Liu, Jie Su, Liangbing Gan
Summary: An open-cage fullerene derivative was prepared by Malaprade oxidation of a vicinal triol moiety. The orifice above the 17-membered ring contains a carboxyl group, and there are three ketone carbonyl groups and one lactone carbonyl group on the rim of the orifice. The carboxylic and carbonyl oxygen atoms around the orifice act as strong polydentate ligands for a sodium ion and also form various isomeric rhodium complexes with comparable stability when reacted with [Rh(CO)(2)Cl](2). The fullerene C=C bond on the rim of the orifice forms a stable platinum complex when treated with Pt(PPh3)(4), and one of the carboxylic oxygen atoms above the orifice forms a H-bond with the water molecule trapped in the cage as revealed by the single crystal X-ray diffraction data.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Falco Reissig, David Bauer, Karrar Al-Ameed, Sandra Luber, Martin Koeckerling, Joerg Steinbach, Hans-Juergen Pietzsch, Constantin Mamat
Summary: Heavy alkaline earth metals, such as barium and radium, have potential applications in radiopharmaceuticals, including diagnosis and targeted therapy. However, there is a lack of suitable chelation agents for these metals. In this study, a series of calix[4]crown-6 derivatives were synthesized as chelators for barium and radium, and their complexation behavior was investigated. The obtained ligands were successfully converted into the desired barium complexes and calix-crown compounds containing sodium ions. DFT calculations and radiolabeling procedures were performed to determine the binding behavior and stability of the complexes.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Ziyang Lu, Yong Guo, Siwei Zhang, Shichao Wu, Rongwei Meng, Shuang Hong, Jiaxi Li, Haoyu Xue, Boyi Zhang, Dinghui Fan, Yifang Zhang, Chen Zhang, Wei Lv, Quan-Hong Yang
Summary: A general remedy for various alkali-metal anodes is reported, utilizing supramolecularization of alkali-metal cations with crown ethers to regulate metal deposition and suppress dendrite formation. This strategy shows promise in producing dendrite-free metal-anode-based batteries and improving the uniformity of coatings in the electrodeposition industry.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Tianyu Li, Yuan Pan, Haixin Song, Hui Jiang, Yujing Guo, Linlin Shi, Xinqi Hao, Mao-Ping Song
Summary: In recent years, there have been significant efforts in the design and self-assembly of discrete covalent organic cages. These cages have various applications, but their potential in enantioselective separation has not been fully explored. This study focuses on the use of chiral cages with custom cavities for effective enantioseparation and reveals diverse host-guest stereoselectivity towards different chiral molecules.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Wen-Zhi Wang, Li-Bo Huang, Shao-Ping Zheng, Emilie Moulin, Odile Gavat, Mihail Barboiu, Nicolas Giuseppone
Summary: A hydrophobic light-driven rotary motor functionalized with two 18-crown-6 macrocycles has been shown to form selective alkali ion channels in phospholipid bilayers, with a significantly accelerated ion transport mechanism under light irradiation attributed to the out-of-equilibrium actuation dynamics of the motors.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Tobias Sprenger, Thomas Schwarze, Holger Mueller, Eric Sperlich, Alexandra Kelling, Hans-Juergen Holdt, Jerome Paul, Vera Martos Riano, Marc Nazare
Summary: In this study, fluorescent probes for the selective quantification of Na+ and K+ in water were developed. These probes showed stability over a wide range of pH values and were not affected by other biologically relevant cations.
Article
Chemistry, Multidisciplinary
Michael K. Bellas, Lake MacKenzie, Adam J. Matzger
Summary: Salt cocrystals typically exhibit distinct packing motifs and noncovalent interactions from their constituent components, with changes in stoichiometry potentially leading to unpredictable changes in materials properties. This study presents a series of salt cocrystals that maintain a general packing motif while allowing access to a range of stoichiometries, breaking away from the common motif of crown ether complexes and exploring compositions with higher proportions of oxidizing salt. The research provides insights for the design of salt cocrystals in the energetic materials field.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Inorganic & Nuclear
Yichao Zhuang, Yuansheng Qian, Danyu Tu, Yan Li, Jiyong Liu, Liang Shen, Di Wu
Summary: Inverse crown ethers (ICEs) have alternating polarity of cationic metal ring and encapsulated ion, with a new tridentate aryloxide-N-heterocyclic carbene ligand introduced to stabilize mu(4)-oxo [Mg4O] cores in ICEs. The reaction with MgBr2 resulted in formation of (L)Mg2Br3, (L)(2)Mg4OBr4, and (L)Mg4OBr5(THF)(2), which all possess ICEs character with mu(4)-Oxo [Mg4O] unit.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Polymer Science
Zhitao Hu, Xiaohui Cao, Xiaohui Zhang, Bin Wu, Wenjun Luo, Huahua Huang, Le Li, Yongming Chen
Summary: A fast and controlled ring-opening polymerization method was reported to prepare PEG-like polyesters, poly(O-15C5), with potential biodegradability and improved immune responses.
Article
Chemistry, Multidisciplinary
Hajime Maeda, Genki Saito, Taniyuki Furuyama, Masahito Segi
Summary: Pyrenophanes 1 and 2 with bridged pyrene at 1,6-positions by tri- and tetra-ethylene glycol chains were synthesized. Addition of Ba(ClO4)(2) affected the fluorescence emission of 1 and 2 differently. n-Bu2NH2+PF6- also had an impact on the fluorescence emission of both compounds. Complexation of Ba2+ with 1 and 2, as well as the formation of pseudorotaxanes with n-Bu2NH2+ was confirmed. Moreover, charge-transfer complexes were formed when pyrenophanes 1 and 2 were mixed with TCNE in CH2Cl2.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Polymer Science
Metwally Ezzat, Karel Lesage, Tomas Sedlacik, Geert De Schutter, Richard Hoogenboom
Summary: In this work, new concrete superplasticizers based on crown ethers as pendant side chains have been prepared. The copolymers with different crown ether side chains showed enhanced dispersion and workability retention in cement pastes. The findings suggest that polymers with a moderate ring size can be of interest as novel superplasticizers in the concrete industry.
EUROPEAN POLYMER JOURNAL
(2023)
Review
Polymer Science
Zheng Li, Ying-Wei Yang
Summary: Conjugated macrocycle polymers (CMPs) are a type of organic porous materials with supramolecular macrocycles embedded in the conjugated skeleton, offering flexibility for molecular design and customized functionalization. They have shown promise in various applications and have sparked growing interest in the research community.
Article
Chemistry, Multidisciplinary
Saveh Djalali, Pablo Simon Marques, Bradley D. Frank, Lukas Zeininger
Summary: A synthetically minimal artificial emulsion platform has been designed in this study, capable of autonomously adapting to its chemical environment through interfacial supramolecular recognition events. The platform demonstrates programmed up- and down-regulating capabilities by selectively assembling synthesized crown ether surfactants onto anisotropic biphasic emulsion droplets. This adaptive soft material platform showcases utility in self-regulated uptake and release of metal ions, biomimetic recognition of biomolecules, and triggered surface-encoded payload release applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Huaping Wang, Jian He, Jiandong Liu, Shihan Qi, Mingguang Wu, Jie Wen, Yanan Chen, Yuezhan Feng, Jianmin Ma
Summary: The electrolyte additive 15-Crown-5 (15-C-5) is able to reduce Li dendrite growth, form a protective layer, and improve cycling and rate performance in symmetric Li|Li cells and Li|LiNi0.6Co0.2Mn0.2O2 (NCM622) full cells.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Zhaojie Li, Jie Shen, Qing Jiang, Sheng Shen, Jing Zhou, Huaqiang Zeng
Summary: When aligned in one dimension on the same side, multiple non-covalently associated crown ether groups can exhibit higher catalytic activity, resulting in significantly reduced catalyst loading.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Ramees Peedika Paramban, Zhifang Guo, Glen B. Deacon, Peter C. Junk
Summary: Treatment of [Sm(DippForm)(2)(thf)(2)] with 1,3,5,7-cyclooctatetraene in toluene under reductive conditions leads to the formation of an inverse sandwich dinuclear complex [Sm-2(DippForm)(4)(COT)] (1). However, in THF, it generates [Sm(DippForm)(COT)(thf)(2)] (2) and [Sm(DippForm)(2)(O-C4H8-DippForm)(thf)] (3). Furthermore, 1 gives 2 and 3 upon treatment with THF.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Taraneh Hajiashrafi, Mohaddeseh Sheikholeslami, Maryam Ahmadi Arjanaki, Sara Tarighi, Zhifang Guo, Peter C. C. Junk
Summary: Two lanthanide-coordination polymers with benzophenone-4,4'-dicarboxylate linker were synthesized and characterized. Both compounds showed chiral three-dimensional uninodal 5-connected net topology. These Ln-CPs were used as heterogeneous catalysts for the acetalization of glycerol, demonstrating their effectiveness as potential Lewis acid catalysts for chemical transformations.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jia-Qian Chen, Leili Esrafili, Fatemeh Parsa, An-Na Sun, Mao-Lin Hu, Ali Morsali, Pascal Retailleau, Zhifang Guo, Peter C. Junk
Summary: Extensive research has been conducted on synthesizing MOFs with high surface areas, but simultaneously introducing functional groups on their backbones is still a challenge. Although using longer links can result in interpenetrating structures or instability, achieving MOFs with large pores and desirable functional groups is a long-standing challenge. However, the crystalline nature of MOFs allows for monitoring and controlling host-guest interactions. To better understand the effects of functional group structure and positions on applications, a platform of azo and azine-containing MOFs was designed and synthesized as a fluorescent probe for Danthron. TMU-84 and TMU-85 showed high sensitivity and significant K-sv (6572) value in distinguishing complementary and mismatched target sequences.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Md Abdul Halim, Zhifang Guo, Glen B. Deacon, Peter C. Junk
Summary: This study demonstrates the preparation of divalent lanthanoid pseudo-Grignard reagents PhLnBr (Ln= Sm, Eu and Yb) by the oxidative addition of bromobenzene (PhBr) to lanthanoid metals in tetrahydrofuran (THF). The reaction of PhLnBr with bulky N,N'-bis(2,6-di-isopropylphenyl)formamidine (DippFormH) generates Ln(II) complexes, and the reaction with 3,5-diphenylpyrazole (Ph2pzH) leads to the formation of both divalent and trivalent complexes. The use of PhLnBr in this work leads to different outcomes compared to previous reactions with PhLnI.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Rajesh Deka, Sourav Dey, Zhifang Guo, Ray J. Butcher, Peter C. Junk, David R. Turner, Harkesh B. Singh, Glen B. Deacon
Summary: Due to the differences between lanthanoids and tellurium atoms, low-coordinate, monomeric lanthanoid tellurolate complexes have been difficult to synthesize compared to complexes with lighter group 16 elements. In a recent study, low-coordinate, monomeric lanthanoid tellurolate complexes were successfully synthesized using hybrid organotellurolate ligands containing N-donor pendant arms. The structures of these complexes were determined using single-crystal X-ray diffraction, and their electronic structures were investigated using DFT calculations.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Zhifang Guo, Md Abdul. Halim, Victoria L. Blair, Glen B. Deacon, Peter C. Junk
Summary: This paper describes a novel and simple method to synthesize lanthanoid(III) diiodide formamidinates through direct reaction of lanthanoid metals with equimolar amounts of iodine and a formamidine under ultrasonication. The products were identified by X-ray crystallography and all the trivalent complexes were found to be stable to rearrangement.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Angus C. G. Shephard, Aymeric Delon, Sylviane Chevreux, Agathe Martinez, Zhifang Guo, Glen B. Deacon, Gilles Lemercier, Nathan McClenaghan, Gediminas Jonusauskas, Peter C. Junk, Florian Jaroschik
Summary: New divalent ansa-octaphenyllanthanocenecomplexes were synthesized through reductive dimerization of 1,2,3,4-tetraphenylfulvene, and their structures and spectroscopic properties were compared to unbridged octaphenyl and decaphenyl sandwich complexes. The reductive dimerization of fulvenes using low-valent metal precursors is a direct method for accessing ethylene-bridged metallocenes. In this work, a new synthesis of the unsubstituted exocyclic 1,2,3,4-tetraphenylfulvene and its characterization, as well as the synthesis of divalent ansa-octaphenylmetallocenes with different lanthanoid metals, were described. The luminescence properties of one of the complexes were also studied.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Ramees Peedika Paramban, Zhifang Guo, Glen B. Deacon, Peter C. Junk
Summary: This paper investigates the interaction between divalent [Sm(DippForm)(2)(thf)(2)] and substrates containing azo linkages. It is found that treatment with trans-azobenzene results in the formation of mononuclear or dinuclear complexes, as well as [Sm(DippForm)(3)]. Moreover, the reaction of [Sm(DippForm)(2)(thf)(2)] with 1H-1,2,3-benzotriazole yields a trivalent samarium complex containing benzotriazolate.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Ruchika Ojha, Peter C. Junk, Alan M. Bond, Glen B. Deacon
Summary: Pt-IV coordination complexes were synthesized by oxidizing the antitumor agent [Pt-II(p-BrC6F4)NCH2CH2NEt2}Cl(py)]. Experimental data showed that excess H2O2 and elevated temperature favored the oxidation of the ligand, while a smaller amount of H2O2 at room temperature favored the oxidation of the metal, resulting in the formation of platinum(IV) complexes.
Article
Biochemistry & Molecular Biology
Vidushi P. Vithana, Zhifang Guo, Glen B. Deacon, Peter C. Junk
Summary: Complexes of alkali metals with carboxylate ions were prepared and their structures were determined. The coordination polymers exhibited a variety of carboxylate-binding modes in different metal complexes.
Article
Chemistry, Multidisciplinary
Josh Moon, Zhifang Guo, Owen A. Beaumont, Sophie Hamilton, Guillaume Bousrez, Eleanor Mottram, Jun Wang, Anthony E. Somers, Glen B. Deacon, Peter C. Junk
Summary: Rare earth(III) 4-hydroxybenzoato (4hob) complexes were prepared in water and characterized by X-ray diffraction. Different structures were observed for La and Ce complexes, while Y complex showed good anticorrosion properties. The La, Ce, and Y aqua complexes exhibited better corrosion inhibition than cerium(III) salicylate. Replacement of coordinated water by bpy improved the anticorrosion performance for La and Y complexes.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Zhifang Guo, Glen B. Deacon, Peter C. Junk
Summary: A mixture of bismuth compounds in different oxidation states was obtained by the reaction of praseodymium metal with tris(pentafluorophenyl)bismuth and bulky N,N'-bis(2,6-diisopropylphenyl)formamidine in tetrahydrofuran. Similar reactions also resulted in the formation of two similar compounds.
DALTON TRANSACTIONS
(2023)
Review
Chemistry, Multidisciplinary
Angus C. G. Shephard, Safaa H. Ali, Glen B. Deacon, Peter C. Junk
Summary: Rare earth biphenolate species have shown diversity and efficacy in organic transformations and polymerisation reactions. Biphenolate ligand systems are still in their infancy in rare earth coordination chemistry. This review highlights the chemistry that has been explored thus far with these carbon bridged lanthanoid biphenolate systems.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Vidushi P. Vithana, Zhifang Guo, Glen B. Deacon, Anthony E. Somers, Peter C. Junk
Summary: Two series of rare earth thiophencarboxylate complexes have been synthesized and their crystal structures have been determined using X-ray diffraction. Thermogravimetric analysis and microanalysis data confirm the composition of the compounds derived from single-crystal data, except for one compound which loses coordinated and lattice water during the drying process. The corrosion inhibitory properties of the synthesized compounds on mild steel show that one compound exhibits the highest inhibition efficiency. Potentiodynamic polarization measurements are consistent with immersion test results, showing that these compounds act predominantly as anodic inhibitors.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Angus C. G. Shephard, Aymeric Delon, Rory P. Kelly, Zhifang Guo, Sylviane Chevreux, Gilles Lemercier, Glen B. Deacon, Galina A. Dushenko, Florian Jaroschik, Peter C. Junk
Summary: In this study, the first divalent europium fluoride half-sandwich complex was isolated and crystallographically characterized through the redox-transmetallation protolysis reaction of europium metal, Hg(C6F5)(2), and pentaphenylcyclopentadiene. Additionally, a new divalent europium alkoxide complex was identified, and evidence for the potential phenyl group migration mechanism was provided.
AUSTRALIAN JOURNAL OF CHEMISTRY
(2022)
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)
