Review
Biochemistry & Molecular Biology
Francisco G. Cirujano, Rafael Luque, Amarajothi Dhakshinamoorthy
Summary: Metal-organic frameworks (MOFs) have become versatile solid materials used in various applications like gas storage, separation, sensors, and catalysis. This review focuses on the use of MOFs as solid catalysts for the Henry reaction, discussing their structural properties and active sites. Comparisons with other solid catalysts in terms of activity and structural stability are made, along with suggestions for future directions in this field.
Article
Chemistry, Applied
Liang Xu, Jia Cui, Shan Gao, Jianjun Wang, Jiao Liu, Hongge Jia, Zhuanfang Zhang, Fengjuan Miao, Yu Zang
Summary: Chiral conjugated microporous polymers (CCMPs) containing amide groups were designed and synthesized for the first time as heterogeneous asymmetric catalyst platforms for the stabilization of Pd in asymmetric catalytic synthesis. Four Pd/CCMPs heterogeneous catalysts exhibited efficient catalytic activity and excellent enantioselectivity in the asymmetric Henry reaction, with a wide range of substrates and easy recovery. The Pd/CCMPs composites could be easily recycled and maintained catalytic activity after 3 cycles of reactions.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
Tiago F. Machado, Gianluca Utzeri, Artur J. M. Valente, M. Elisa Silva Serra, Dina Murtinho
Summary: A primary amine-rich beta-cyclodextrin nanosponge was synthesized under mild conditions and showed potential as a heterogeneous catalyst for metal-free reactions.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Applied
Silvia Izquierdo, Guadalupe Silvero, Carlos J. Duran-Valle, Ignacio M. Lopez-Coca
Summary: The development of new chemical synthetic methodologies is important for transforming industrial chemical processes into more sustainable ones. The use of activated carbons as catalysts improves reaction rate, yield, and ease of work-up. The researchers found that simple modification of commercial xerogel with sulfuric acid results in a more efficient catalyst, which shows promising results in acetylation reaction.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Cristian Cavedon, Sebastian Gisbertz, Susanne Reischauer, Sarah Vogl, Eric Sperlich, John H. Burke, Rachel F. Wallick, Stefanie Schrottke, Wei-Hsin Hsu, Lucia Anghileri, Yannik Pfeifer, Noah Richter, Christian Teutloff, Henrike Mueller-Werkmeister, Dario Cambie, Peter H. Seeberger, Josh Vura-Weis, Renske M. van der Veen, Arne Thomas, Bartholomaus Pieber
Summary: We demonstrate visible-light-mediated carbon-heteroatom cross-coupling reactions using a photoactive Ni(II) precatalyst. The activation of this precatalyst involves an initial intraligand charge transfer event triggered by visible light irradiation. Additionally, a porous, recyclable organic polymer for heterogeneous nickel catalysis of cross-coupling reactions is obtained through ligand polymerization.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Multidisciplinary Sciences
Zhe Dong, David W. C. MacMillan
Summary: Metal-catalysed cross-couplings are widely used for the formation of C-C bonds, but alkyl cross-couplings using alcohols as coupling partners remain relatively underdeveloped. A new method for direct deoxygenative cross-coupling of free alcohols has been developed, showing potential for a wide range of applications, including the pharmaceutical industry. This technology represents a general strategy for combining in situ alcohol activation with transition metal catalysis.
Article
Chemistry, Multidisciplinary
Yuki Saito, Shu Kobayashi
Summary: The application of heterogeneous catalysts in continuous-flow enantioselective hydroacylation reactions was studied. Catalysts were prepared by mixing supports and rhodium complexes, and showed excellent activity and enantioselectivity. Under optimized conditions, the catalysts exhibited high turnover numbers and could be applied to various substrates. Furthermore, sequential-flow reactions with other heterogeneous catalysts were demonstrated for the synthesis of biologically active molecules and functional materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Lin-Yan Bao, Rong-Wan Gao, Shuang Wang, Run-Han Li, Bo Zhu, Zhong-Min Su, Wei Guan
Summary: Photoredox/transition-metal dual catalysis is an efficient method for constructing C-N bonds. However, low recovery, low utilization rate, and high cost have hindered its application and development. By utilizing zinc powder, the oxidation state of nickel was successfully regulated, achieving a catalytic cycle without light.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Engineering, Chemical
Rakhi Vishwakarma, Lakshmi Kantam Mannepalli, Virendra Rathod
Summary: The performance of fluorapatite (FAP) catalyst in the kinetics of Henry reaction was investigated. The catalyst exhibited the highest conversion and selectivity of 65% and 80%, respectively, at a temperature of 323 K. The kinetic model was validated, and the absence of mass transfer resistance was confirmed using the Weisz Prater criterion. The synthesized catalyst was characterized using various techniques, and the effects of catalyst loading, temperature, mole-ratio, stirring speed, and solvents on the reaction were studied. The FAP catalyst showed good reusability for up to four cycles.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Chemistry, Organic
Roman Ivanov, Elizaveta Ivanova, Vladislav Merkulov, Mikhail Zharkov, Ilya Kuchurov, Sergei Zlotin
Summary: For the first time, amines have been condensed with carbonyl compounds in supercritical carbon dioxide (sc-CO2). The reactions with aldehydes or active ketones proceed at moderate temperatures without external catalysts. The process is autocatalytic, accelerated by the carbonic acid generated in situ. The imine products obtained in high yields in a crystalline form can be used in one-pot transfer hydrogenation and [4+2] cycloaddition reactions for green synthesis of more complex and valuable compounds.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Review
Biochemistry & Molecular Biology
Juliano B. Azeredo, Filipe Penteado, Vanessa Nascimento, Luca Sancineto, Antonio L. Braga, Eder Joao Lenardao, Claudio Santi
Summary: This review highlights the applications of organoselenium compounds in biology, medicine, and material sciences, as well as the potential to synthesize them through environmentally sustainable methods.
Article
Chemistry, Multidisciplinary
Jens Moons, Alexandra Loosen, Charlotte Simms, Francisco de Azambuja, Tatjana N. Parac-Vogt
Summary: Materials with enzyme-like activities and proteolytic potential, such as the Hf6O8-based NU-1000 metal organic framework, are showing promise as robust and effective alternatives to natural enzymes. The Hf-MOF exhibited high selectivity in cleaving protein substrates and maintained hydrolytic activity efficiently. In comparison to the Zr-NU-1000, the Hf variant showed slightly slower reaction rates but greater stability and recyclability, attributed to intrinsic differences between Hf-IV and Zr-IV centers and the lower surface area of Hf-NU-1000.
Article
Chemistry, Multidisciplinary
Stuart C. D. Kennington, Saul F. Teloxa, Miguel Mellado-Hidalgo, Oriol Galeote, Sabrina Puddu, Marina Bellido, Pedro Romea, Felix Urpi, Gabriel Aullon, Merce Font-Bardia
Summary: A direct and asymmetric aldol reaction of N-acyl thiazinanethiones with aromatic aldehydes catalyzed by chiral nickel(II) complexes was reported. The reaction gives high yields of O-TIPS-protected anti-aldol adducts with remarkable stereocontrol and atom economy. The removal of the achiral scaffold provides enantiomerically pure intermediates with synthetic interest for producing anti-alpha-amino-beta-hydroxy and alpha,beta-dihydroxy carboxylic derivatives, with theoretical calculations explaining the observed high stereocontrol.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Xuanyu Feng, Yang Song, Wenbin Lin
Summary: This study introduces a dimensional reduction strategy to construct a two-dimensional metal-organic framework (MOF) with high accessible Lewis acidic sites, which shows superior catalytic performance in sterically hindered multicomponent reactions (MCRs) compared to three-dimensional MOF counterparts. The topology-activity relationships in these Zr-based Lewis acidic MOFs were rationalized by comparing their Lewis acidity, numbers of Lewis acidic sites, and sterically accessible Lewis acidic sites. The dimensional reduction strategy holds promise for developing other MOF catalysts for synthetically useful and complicated organic transformations.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Applied
Challa Madhavi, Himavathi Ganja, Nagaraju Kerru, Suresh Maddila, Sreekantha B. Jonnalagadda
Summary: The study demonstrated the synthesis of composite materials with varying titanium dioxide loading on hydroxyapatite and characterized their structural properties and morphologies through a variety of analyses. The as-prepared composite materials showed efficient catalytic activity in synthesizing novel compounds with impressive yields at room temperature.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Bipeen Dahal, Kisan Chhetri, Alagan Muthurasu, Tanka Mukhiya, Arjun Prasad Tiwari, Jagadis Gautam, Jun Youb Lee, Dong Chul Chung, Hak Yong Kim
Summary: A high-performance supercapacitor device capable of maintaining performance consistency under xy-biaxial stretching conditions has been developed, showcasing excellent mechanical and electrochemical stability.
ADVANCED ENERGY MATERIALS
(2021)
Article
Energy & Fuels
Arjun Prasad Tiwari, Kisan Chhetri, Hyoju Kim, Seongmin Ji, Su-Hyeong Chae, Taewoo Kim, Hak Yong Kim
Summary: The study reported the significance of phytic acid-mediated polypyrrole networks in energy storage applications, showcasing the self-assembly of porous electrode materials through hydrogen bonding and electrostatic interactions, resulting in enhanced capacitance, with phytic acid playing a key role in electrode material design.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Polymer Science
R. Vasanthapriya, N. Neelakandeswari, K. Uthayarani, M. Chitra
Summary: This study reported the performance of alizarin based SnO2 dye-sensitized solar cells prepared using a novel template assisted method for tin oxide nanoparticles synthesis under different pH values. The structural, morphological and optical properties of the nanoparticles were studied using various techniques, and the characteristic parameters of the fabricated cell were determined based on measured I-V curves.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Polymer Science
Nasser A. M. Barakat, Mohamed Taha Amen, Rasha H. Ali, Mamdouh M. Nassar, Olfat A. Fadali, Marwa A. Ali, Hak Yong Kim
Summary: The power generation in microbial fuel cells can be enhanced by using double active layers or Co-doped carbon nanofiber anodes. These anodes also show high COD removal rates and Columbic efficiencies.
Article
Nanoscience & Nanotechnology
K. Chhetri, A. Muthurasu, B. Dahal, T. Kim, T. Mukhiya, S. -h. Chae, T. H. Ko, Y. C. Choi, H. Y. Kim
Summary: An efficient and stable electrocatalyst for overall water splitting in alkaline media was successfully prepared using a rational design of two-dimensional metal-organic framework (MOF)-derived mesoporous structures. The catalyst exhibited enhanced electrocatalytic activity towards the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) due to abundant heterointerfaces, mesoporous nanostructures, and multimetallic active centers. This work opens up new possibilities for exploring MOF-based catalysts for overall water splitting applications.
MATERIALS TODAY NANO
(2022)
Article
Chemistry, Physical
Debendra Acharya, Ishwor Pathak, Bipeen Dahal, Prakash Chandra Lohani, Roshan Mangal Bhattarai, Alagan Muthurasu, Taewoo Kim, Tae Hoon Ko, Kisan Chhetri, Hak Yong Kim
Summary: The combination of bimetallic oxide nanomaterials and porous carbon materials has significantly contributed to the development of high-performance energy storage devices. Researchers have successfully synthesized porous multimetal nanomaterials using a self-templated metal-organic framework strategy, resulting in excellent electrochemical performance in supercapacitors.
Article
Chemistry, Multidisciplinary
Nasser A. M. Barakat, Rasha H. Ali, Hak Yong Kim, Mamdouh M. Nassar, Olfat A. Fadali, Gehan M. K. Tolba, Hager M. Moustafa, Marwa A. Ali
Summary: Carbon nanofiber-decorated graphite rods are introduced as effective and low-cost anodes for microbial fuel cells. The performance is improved by creating a 3D carbon nanofiber layer on the surface of the rods. Additionally, a membrane-less cell coated with electrospun nanofiber layer is used to decrease internal resistance.
Article
Chemistry, Multidisciplinary
Seong-Min Ji, Alagan Muthurasu, Hak Yong Kim
Summary: This work describes a concise method for generating marigold flower-like metal-organic frameworks (MOFs) aided manganese vanadium oxide via a hydrothermal procedure for increased OER activity. As synthesized MOF MnV oxide has a higher surface area due to the 3D flower-like structure, which is reinvented with enhanced electrocatalytic active sites. These distinctive structural features result in remarkable catalytic activity for MOF MnV oxide microflowers towards OER.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Alagan Muthurasu, Prabhakaran Sampath, Tae Hoon Ko, Prakash Chandra Lohani, Ishwar Pathak, Debendra Acharya, Kisan Chhetri, Do Hwan Kim, Hak Yong Kim
Summary: A defect-rich porous framework composed of metal-organic compound networks is developed to create high-performance electrocatalysts with improved electrochemical activity, conductivity, and mass transport properties. The resulting hollow carbon nanostructures with in situ-grown N-doped graphitic carbon matrix and embedded selenium-doped CoS2 hollow spheres exhibit efficient and long-lasting chemical energy conversion functions. Additionally, a zinc-air battery with excellent discharge-charge performance and mechanical stability is successfully constructed using this technique.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Review
Energy & Fuels
Kisan Chhetri, Anup Adhikari, Jyotendra Kunwar, Debendra Acharya, Roshan Mangal Bhattarai, Young Sun Mok, Achyut Adhikari, Amar Prasad Yadav, Hak Yong Kim
Summary: Zeolitic Imidazolate Frameworks (ZIFs) and their hybrid composites have shown promising potential in supercapacitors due to their excellent conductivity and high surface area. Pure ZIFs have poor electrochemical performance, but can be improved by mixing with other materials to prepare hybrid composites. ZIFs' porous structure and large surface area make them an ideal template for designing composites with excellent supercapacitor applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Review
Chemistry, Multidisciplinary
Anup Adhikari, Kisan Chhetri, Rajan Rai, Debendra Acharya, Jyotendra Kunwar, Roshan Mangal Bhattarai, Rupesh Kumar Jha, Dasharath Kandel, Hak Yong Kim, Mani Ram Kandel
Summary: Zinc-air batteries (ZABs) have received significant attention as a potential alternative to lithium-ion batteries (LIBs) due to their impressive energy density and low cost. Electrocataysts play a crucial role in enhancing the efficiency and stability of zinc-air batteries. This scholarly review article highlights the importance of electrocatalysts in ZABs and explores the use of Fe-Co-Ni-Zn-based metal-organic framework (MOF)-derived hybrid materials as potential electrocatalysts. These MOF-derived electrocatalysts offer advantages such as abundance, high catalytic activity, tunability, and structural stability, making them suitable for ZAB applications.
Article
Chemistry, Physical
Ishwor Pathak, Debendra Acharya, Kisan Chhetri, Prakash Chandra Lohani, Subhangi Subedi, Alagan Muthurasu, Taewoo Kim, Tae Hoon Ko, Bipeen Dahal, Hak Yong Kim
Summary: In this study, a novel Ti3C2Tx MXene-decorated porous carbon nanofiber (PCNF) freestanding/flexible electrode is prepared by electrospinning, in situ growth of ZIF67, and carbonization processes. The optimized MX-5@PCNF exhibits high specific capacitance, cycling stability, and rate capability. Furthermore, MX-5@PCNF-based flexible symmetric and asymmetric supercapacitors demonstrate high energy densities, long life cycle, and ideal coulombic efficiency, showing their practical applicability. This study provides an alternative strategy to prepare MXene-decorated PCNF freestanding electrodes and can be extended to other 2D MXenes for designing efficient electrodes for flexible supercapacitors.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Mohamed Taha Amen, Hak Yong Kim, Nasser A. M. Barakat
Summary: Low mass transfer and poor reaction kinetics are the main reasons for the low power density of microbial fuel cells (MFCs). Microscale MFCs offer a solution for the mass transfer problem, but their power density and coulombic efficiency are still limited by the reaction kinetics. This study introduces a 3D carbon nanofiber disk as an effective anode for a micro-sized MFC, improving the reaction kinetics and achieving high power and current densities.
Article
Chemistry, Multidisciplinary
Alagan Muthurasu, Kisan Chhetri, Bipeen Dahal, Hak Yong Kim
Summary: In this study, porous bimetallic nanoarrays integrating ruthenium were successfully generated using a simple solution-based deposition technique followed by calcination. These nanoarrays showed exceptional catalytic activity in reactions including the oxygen evolution reaction, hydrogen evolution reaction, and oxygen reduction reaction. The results demonstrated the remarkable electrochemical performance of the porous nanostructured arrays.
Article
Materials Science, Multidisciplinary
R. Vasanthapriya, N. Neelakandeswari, K. Uthayarani, M. Chitra
Summary: In this study, onion was used as a biological template for the first time to synthesize tin oxide nanoparticles, which were then applied in the fabrication of dye-sensitized solar cells. Comparing the DSSC prepared with and without the template, it was found that the DSSC prepared with the biotemplate exhibited better efficiency and fill factor.
CHALCOGENIDE LETTERS
(2021)
Article
Chemistry, Organic
Geeta Devi Yadav, Pooja Chaudhary, Balaram Pani, Surendra Singh
Summary: Chiral transition metal complexes with privileged ligands are efficient catalysts for various asymmetric organic transformations. Transition metal complexes of C1-symmetric pyrrolidine-based ligands have been widely used in asymmetric organic reactions. However, a comprehensive review article on the transition metal complexes of chiral C1-symmetric pyrrolidine-based ligands derived from (L)-proline has not been published.
TETRAHEDRON LETTERS
(2024)
