Review
Energy & Fuels
Zhong Sun, XiXin Duan, Pitchaimari Gnanasekarc, Ning Yan, Junyou Shi
Summary: This review outlines recent breakthroughs in obtaining platform chemicals from carbohydrates through cascade reactions using heteropolyacid catalysts. Researchers have found that adjusting the active sites on carbohydrates can control the final products. In addition, the relationship between the structure of heteropolyacid catalysts and the final products is discussed.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Review
Chemistry, Physical
Dongyan Xu, Yan Zhang, Qingjie Guo
Summary: This review summarizes recent advances in metallic and nonmetallic catalysts for the alcoholysis of NaBH4, discusses the advantages and disadvantages of various catalysts, and explores the catalytic mechanisms related to NaBH4 methanolysis.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Multidisciplinary Sciences
Yali Zhou, Xingjun Xu, Hongwei Sun, Guanyu Tao, Xiao-Yong Chang, Xiangyou Xing, Bo Chen, Chen Xu
Summary: This study reports effective platinum catalysts for hydroalkoxylation and hydroamination of unactivated alkenes, accommodating various alkene substitution patterns and providing a foundation for rational design of chiral catalysts through detailed mechanistic investigations.
NATURE COMMUNICATIONS
(2021)
Review
Nanoscience & Nanotechnology
Liuzhang Ouyang, Jun Jiang, Kang Chen, Min Zhu, Zongwen Liu
Summary: Hydrogen, as an environmentally friendly energy carrier, is considered an ideal alternative to fossil fuels. However, the development of efficient and low-cost hydrogen production methods remains a challenge. Various strategies have been developed to improve hydrogen generation efficiency, but there is a need to find low-cost material systems based on abundant resources.
NANO-MICRO LETTERS
(2021)
Review
Chemistry, Multidisciplinary
Masoud Mandooie, Mahdi Rahimi, Golara Nikravesh, Ehsan Salehi
Summary: Urea alcoholysis is an environmental-friendly and economic method for dimethyl carbonate (DMC) production, and various catalysts have been used in this process. Zinc-based mixed metal oxides (MMOs) have emerged as potential catalysts due to their amphoteric nature and abundance of basic/acidic sites. This article reviews the catalytic performances and mechanisms, synthesizing methods, characterizations, and operating conditions of zinc-based MMO catalysts over a 20-year period. It was found that zinc-based MMO catalysts showed superior performance in DMC conversion compared to pure ZnO catalyst, with the highest DMC production yields achieved by ZnO/CaO and Zn/Ce/La catalysts. Different catalyst-test modes and synthesizing methods were also highlighted in this review.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Agriculture, Multidisciplinary
Sibo Zhao, Xuezheng Huang, Zhenli Yan, Chun Chang, Guizhuan Xu, Chaojun Du, Youzhou Jiao, Zhiyong Chen
Summary: This study demonstrates the efficient conversion of wheat straw into levulinic acid and methyl levulinate using a mixed acid catalyst system. Optimal conditions in a methanol/H2O medium with specific water content were found to enhance product yield.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2022)
Review
Chemistry, Physical
Yan Wang, Zhe Hu, WeiHua Chen, Shiwei Wu, Guode Li, Shulei Chou
Summary: Hydrogen energy is proposed as a promising energy replacement to resolve the current energy problems for sustaining the long-term development of human society and eventually achieving the hydrogen economy. Seeking appropriate non-noble metal-based catalysts is the vital step that is needed to improve the sluggish kinetics of the hydrolysis process. The study systematically discusses different non-noble metal-based catalysts and emphasizes the importance of developing sustainable and clean hydrogen energy.
Article
Chemistry, Multidisciplinary
Karin Ratzenboeck, Mir Mehraj Ud Din, Susanne M. Fischer, Ema Zagar, David Pahovnik, A. Daniel Boese, Daniel Rettenwander, Christian Slugovc
Summary: Using water as a monomer in polymerization reactions is a sustainable strategy. The oxa-Michael polyaddition of water and divinyl sulfone demonstrates high yield polymerization in an interfacial reaction under nucleophilic or base catalysis at room temperature. The resulting polyethersulfone is then applied as a solid polymer electrolyte, showing excellent oxidative stability and conductivity.
Article
Engineering, Environmental
Xiang Lyu, Gerardine G. Botte
Summary: The study found that in addition to the oxidation of corncobs and xylose, the formation of humins also affects the furfural yield when implementing metal chloride-based catalysts. Furthermore, analyzing the chemical properties of metal ions can help predict the catalyst's activity in furfural production.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Samikannu Prabu, Hong -Wen Wang
Summary: The highly active metal-composite aluminum hydroxide (MCAH) catalyst, prepared by a simple co-precipitation method, promotes the reaction between Al and water by decreasing the induction time. The metallic nanoparticles, including Ni, Co, and Ag, attached to the surface of aluminum hydroxide contribute to the increased catalytic activity and facilitate hydrogen generation.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Engineering, Chemical
Jia-nan Gu, Jianxing Liang, Songjie Hu, Yixin Xue, Xin Min, Mingming Guo, Xiaofang Hu, Jinping Jia, Tonghua Sun
Summary: In this study, a series of catalysts were prepared using impregnation method and it was found that Al(2)O(3) modified with 10% KOH showed better catalytic performance in removing COS from BFG. The results indicated that alkali metal played a significant role in enhancing COS removal efficiency. In addition, the mechanism and degradation route of COS hydrolysis on Al(2)O(3) modified with 10% KOH were explored.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Si Ye, Yufeng Wang, Bohao Du, Lei Cheng, Lixian Sun, Puxuan Yan
Summary: The design of an efficient and reusable monolithic catalyst is crucial for catalyzing the hydrolysis of NaBH4 to generate H-2. In this study, a composite aerogel catalyst with optimized mechanical and catalytic properties was prepared and tested for hydrogen generation rate and retention.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Fanzhen Lin, Anguo Zhang, Jiapeng Zhang, Lijing Yang, Fengming Zhang, Ran Li, Hua Dong
Summary: Carbon-supported Co catalysts fabricated in this study exhibit excellent catalytic activity for NaBH4 hydrolysis, particularly under alkaline conditions. The good distribution of Co species in the catalysts allows for high metal loading without significant decrease in Co efficiency. This type of Co catalyst shows great promise for controllable hydrogen generation from NaBH4 hydrolysis.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Federica Santulli, Daniela Pappalardo, Marina Lamberti, Alessandra Amendola, Carmine Barba, Alessandra Sessa, Giovanni Tepedino, Mina Mazzeo
Summary: A series of zinc complexes supported by tridentate imino-phenolate ligands with different substituents showed dynamic behavior and high efficiency in the ring-opening polymerization (ROP) of cyclic esters. The presence of electron-donating groups increased the polymerization rate, while sterically encumbered groups had detrimental effects. These complexes also demonstrated high catalytic activity in alcoholysis and glycolysis reactions, offering new contributions for a circular economy of plastics.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Jinling Zhou, Xuejiao Feng, Yafei Zhao, Rongqian Cui, Dan Wang, Bing Zhang
Summary: In this study, a CuNi/Co3O4 catalyst was prepared and showed high hydrogen generation rate and good magnetic separability in the hydrolysis of ammonia borane. These results suggest the promising application prospects of cobalt oxide in this field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Letter
Public, Environmental & Occupational Health
Etsuji Suzuki, Eiji Yamamoto
Article
Chemistry, Organic
Tamao Ishida, Zhenzhong Zhang, Haruno Murayama, Eiji Yamamoto, Makoto Tokunaga
Summary: The review provides an overview of C-H functionalization reactions, with a focus on reactions involving Pd- and Au-supported catalysts. Key topics covered include reaction mechanisms, active species, leaching, and reusability.
SYNTHESIS-STUTTGART
(2021)
Article
Chemistry, Physical
Eiji Yamamoto, Yasutaka Kawai, Kei Takakura, Moemi Kimura, Haruno Murayama, Hironobu Matsueda, Shujiro Otsuki, Hiroshi Sakata, Makoto Tokunaga
Summary: A convenient catalytic method for the preparation of unsymmetrical disulfanes is described in this study. Na-exchanged X type zeolite effectively catalyzes thiol-disulfane exchange reactions under mild conditions, with various functionalized thiols and disulfanes showing good tolerance in the system and high yields of the corresponding products. The Na-X catalyst can be recycled multiple times without loss of yield, and preliminary mechanistic studies suggest involvement of base-catalyzed mechanisms with hydrogen-bonding interactions.
Article
Chemistry, Physical
Qi-An Huang, Asahi Haruta, Yuhya Kumamoto, Haruno Murayama, Eiji Yamamoto, Tetsuo Honma, Mitsutaka Okumura, Hiroki Nobutou, Makoto Tokunaga
Summary: The study demonstrates that highly dispersed supported platinum catalyst can act as a heterogeneous soft Lewis acid, showing high turnover numbers and reusability in the isomerization of allylic esters under solvent-free conditions. The residual chloride anion enhances the Lewis acidity of the Pt metal center, improving catalytic activity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Public, Environmental & Occupational Health
Etsuji Suzuki, Eiji Yamamoto
Summary: This article discusses the application of the sufficient cause model and the marginal sufficient component cause model in causality, emphasizing the definition of agonism and its visualization in the traditional sufficient cause model.
Article
Public, Environmental & Occupational Health
Etsuji Suzuki, Michio Yamamoto, Eiji Yamamoto
Summary: This study discusses a new method for assessing confounding in a counterfactual framework, by examining the exchangeability of measures of association when exposure status is flipped in the population of interest. The results show that even if measures of association are exchangeable, confounding in distribution and in measure may still exist.
JOURNAL OF EPIDEMIOLOGY
(2023)
Article
Chemistry, Physical
Yasutaka Kawai, Kazuki Haruguchi, Keisei Sumikawa, Mai Kawada, Eiji Yamamoto, Haruno Murayama, Makoto Tokunaga
Summary: In this study, the aerobic oxidation of isoprene glycol using Pt-Bi catalysts supported on ZrO2 or TiO2 was investigated. These catalysts showed high tolerance to high substrate concentration conditions and exhibited high recyclability.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Qi-An Huang, Takaaki Ikeda, Kazuki Haruguchi, Seiya Kawai, Eiji Yamamoto, Haruno Murayama, Tamao Ishida, Tetsuo Honma, Makoto Tokunaga
Summary: In this study, a Na-Au/ZrO2 catalyst was prepared and the role of sodium species in the reaction was studied. The active sites of the catalyst located on the surface of supported Au NPs were found to determine the reaction rate, and the rate-determining step was presumed to be protodeauration.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Applied
Qi-An Huang, Haruno Murayama, Eiji Yamamoto, Tetsuo Honma, Makoto Tokunaga
Summary: Metal oxides supported platinum catalysts with residual chloride are reusable soft Lewis acid catalysts for the isomerization of allylic esters. An investigation on the reusability and deactivation mechanism of supported platinum catalysts in the isomerization of but-3-ene-1,2-diyl diacetate was conducted. The reduction of PtOxCly species is the main reason for deactivation, and treating the used catalysts with HCl shows a great reactivation effect.
Review
Environmental Sciences
Toshihide Tsuda, Yumiko Miyano, Eiji Yamamoto
Summary: This passage describes a critical evaluation of a review paper that misused epidemiological methods. The review paper misinterpreted and compared the screening results of thyroid cancer after the Fukushima nuclear accident, while ignoring important information. The evaluation found that the paper misused epidemiological methods.
ENVIRONMENTAL HEALTH
(2022)
Article
Green & Sustainable Science & Technology
Taka-Aki Shinozaki, Masahiko Suenaga, Yohan Ko, Eiji Yamamoto, Haruno Murayama, Makoto Tokunaga
Summary: In this study, a UV light irradiation-based desulfurization method was developed for aromatic sulfur compounds without the use of catalysts or additives. The method was found to be efficient in removing sulfur from benzothiophene derivatives and dibenzothiophenes under room temperature and atmospheric pressure, producing sulfur allotropes.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Organic
Eiji Yamamoto, Kaoru Kobayashi, Kodai Wakafuji, Takashi Kamachi, Makoto Tokunaga
Summary: This study presents a detailed theoretical mechanistic investigation on the dynamic kinetic resolution of N-protected amino acid esters using phase-transfer catalysts. By applying the ConFinder program and the pseudo-TS conformational search (PTSCS) method, a semi-automatic exhaustive conformation search of transition state (TS)-like structures was conducted. The results of this conformational search method provided reasonable TS structures for determining the stereoselectivity in the asymmetric base hydrolysis of hexafluoroisopropyl (HFIP) esters as well as the racemization mechanism. Additionally, the independent gradient model (IGM) analysis of the TS structures revealed that H bonding interactions with the oxyanion hole and p-stacking interactions are common and important features in determining the stereoselectivity.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Kosuke Nakamoto, Junwen Bai, Minyan Zhao, Ryo Sakamoto, Liwei Zhao, Masato Ito, Shigeto Okada, Eiji Yamamoto, Haruno Murayama, Makoto Tokunaga
Summary: A metal-organic framework (MOF) with a redox active 1,4,5,8-naphthalenetetracarboxdiimide (NDI) derivative in its organic linker exhibits excellent rate performance as an electrode material for aqueous batteries due to its large pores. Among the tested aqueous electrolytes, K+-based ones demonstrate the highest rate performance, attributed to the highest mobility of the smallest hydrated K+ ion. However, the use of a counter electrode with insufficiently small pores offsets this advantage, suggesting that achieving maximum rate performance in aqueous batteries requires further development of electrode materials with sufficiently large pores.
Article
Mathematics, Interdisciplinary Applications
Etsuji Suzuki, Eiji Yamamoto
Summary: In this article, we discuss the concepts and calculation methods for various measures in the counterfactual framework, including the attributable fraction, preventable fraction, and prevented fraction. These measures are useful for assessing the impact of potential health interventions in exposed groups with causal or preventive effects. We also propose a new measure called the attributed fraction and discuss the relations between different measures and vaccine efficacy.
JOURNAL OF CAUSAL INFERENCE
(2023)
Article
Public, Environmental & Occupational Health
Etsuji Suzuki, Eiji Yamamoto
Summary: The assessment of causality is crucial in epidemiology and biomedical sciences. The sufficient cause model and potential-outcome model are key in understanding causal mechanisms and observed risks. A clear understanding of the link between these models is essential for interpreting associations in subpopulations defined by exposure and confounder.
EUROPEAN JOURNAL OF EPIDEMIOLOGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Guojun Hu, Ziyue Deng, Yanwei Wang, Dan Yuan, Yong Zhang, Yingming Yao
Summary: A series of rare-earth metal complexes were synthesized and used as efficient initiators for the polymerization of trimethylene carbonate (TMC) and (L)-lactide ((L)-LA).
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Van Ha Nguyen, John H. K. Yip
Summary: In this study, eight PtII-azulene complexes were synthesized to investigate the effect of metalation on the electronic structures, spectroscopy, and luminescence of organic chromophores. The results showed that the attachment of Pt substituents to azulene affected the HOMOs, LUMOs, and luminescence properties. The study provides insights into the role of metalation in modifying the properties of organic chromophores.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Moon Kedia, Virender Singh, Bhaskaran Shankar, Malaichamy Sathiyendiran
Summary: This study synthesized two types of neutral binuclear metallocycles using a one-pot solvothermal method and characterized their structures. The analysis revealed that these complexes adopt a binuclear heteroleptic cyclic architecture and belong to phosphine oxide donor (P=O)-based supramolecular coordination cyclic complexes.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Radhey S. Srivastava
Summary: This study demonstrates the effectiveness of zero-valent elements as reductants for the deoxydehydration reaction of polyols catalyzed by ONO-pincer ligated molybdenum dioxo. The insolubility and easy separability of the reductants and their oxidized products during the reaction are emphasized. Additionally, the choice of ligand has an impact on the catalytic performance of the reaction.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Hao Zhou, Yajun Sun, Li Deng, Weiran Yang, Yuehui Li
Summary: Efficient Ru-catalyzed hydrogenation of aldehydes was achieved using carbazole-derived phosphine ligands, with the crucial role of N-H moiety in promoting the catalytic reaction. The method was successfully applied in the Co/Ru-catalyzed hydroformylation process, resulting in the production of long-chain alcohols with excellent yields.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Theodor Danescu, Alexandru Lupan, Radu Silaghi-Dumitrescu, R. Bruce King
Summary: The structures and energies of complexes containing (Me2C2N2P)2Ru2(CO)n and (Me2C2N2P)2Fe2(CO)n have been studied. Low-energy structures are characterized by the presence of bridging diazaphospholyl rings, while higher-energy structures involve different ligand structures.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Savannah C. Kapper, Aamani Ponnekanti, Jonas Schaab, Tian-yi Li, Christine L. Chung, Gael Ung, Peter I. Djurovich, Mark E. Thompson
Summary: Organometallic iridium complexes with two cyclometalated ligands and one bis-oxazoline derived ancillary ligand were studied. These complexes have emission spanning across the visible and near-ultraviolet region, with moderate to high photoluminescence quantum yields. The (ppy)2Ir(BOX-CN) complexes were resolved into Delta- and Lambda-diastereomers based on solubility differences.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Zahra Karimi Sangari, Hossein Naeimi
Summary: In this research, a nanostructured CoCuFe2O4 catalyst was prepared using a brief and useful synthetic strategy. This catalyst was used for synthesizing 1,2,4,5-tetrasubstituted imidazole derivatives under ultrasonic irradiation. The approach offers advantages such as high efficiency, short reaction times, simplicity of the reaction medium, accelerated reaction rates, and easier separation and purification of products.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Rukhsana Gul, Wajid Munir, Ebraheem Abdu Musad Saleh, Shaukat Shujah, Muhammad Sirajuddin, Saira Tabassum, Khalil Ur Rehman, Dilfaraz Khan, Sameerah I. Al-Saeedi, Ehab A. Abdelrahman
Summary: Two new Schiff base ligands were synthesized and used to form copper, nickel, and cobalt complexes. The synthesized compounds were characterized and screened for various biological activities. The metal complexes showed better activities in antibacterial, antifungal, antidiabetic, and antioxidant assays.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Review
Chemistry, Inorganic & Nuclear
Ahsan Nazir, Pengwei Huo, Ameena Tur Rasool
Summary: This review explores the potential of g-C3N4-based S-scheme heterojunctions in addressing environmental issues. It summarizes the mechanism and preparation techniques of S-scheme heterojunctions based on g-C3N4, and presents recent studies on their applications in pollutant removal, CO2 reduction, hydrogen production, and bacterial disinfection. The review concludes with an outlook on future challenges for g-C3N4-based S-scheme heterojunctions.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Francois Mazars, Koffi Senam Etse, Guillermo Zaragoza, Lionel Delaude
Summary: The activity of three Pd-PEPPSI catalyst precursors with N-heterocyclic carbene (NHC) ligands derived from caffeine and theophylline in Mizoroki-Heck reactions was tested. The results showed that the catalysts achieved high conversions and yields, especially in the presence of electron-withdrawing substituents.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Bo-Han Wu, Xue Zhou, Lin Liu, Zheng-Bo Han
Summary: Researching carbon dioxide removal from flue gas and natural gas is crucial. Metal-organic frameworks (MOFs) are commonly used in adsorption due to their high surface area, porosity, and chemical properties. An ultra-microporous MOF CPM-20(Co) with mixed ligand was synthesized using inexpensive ligands. The material exhibited high selectivities and low regenerative energy, making it a promising option for CO2 separation in industries.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)