Review
Chemistry, Multidisciplinary
Suman Pradhan, Sourav Roy, Basudev Sahoo, Indranil Chatterjee
Summary: CO2 is being efficiently converted into value-added products through catalytic techniques, with visible-light photocatalysis playing a significant role in this process. The combination of CO2 with light energy has shown promising results, particularly in the past three years.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Ting-Kai Xiong, Xue-Qi Zhou, Min Zhang, Hai-Tao Tang, Ying-Ming Pan, Ying Liang
Summary: A novel electrocatalyzed three-component cascade reaction has been developed for synthesizing a series of new carbamate compounds efficiently and environmentally friendly. The reaction promotes the participation of carbon dioxide in the three-component reaction by electro-oxidation, and pharmacological activity studies demonstrate that the carbamate compounds have better activity than diamination by-products.
Article
Chemistry, Physical
Guo-Lin Yang, Chi -Tien Hsieh, Yeu-Shiuan Ho, Tung-Chun Kuo, Youngkook Kwon, Qi Lu, Mu-Jeng Cheng
Summary: By coelectrolysis of CO2 with nitrogen compounds, molecules containing C-N bonds can be generated and synthesized on Cu(111). It has been discovered that the first C-N bond formation occurs through the coupling of gaseous CO2 with surface-bound N1 intermediates generated during the reduction of NO3-/NO2- to NH3, rather than through intermediates from CO2 electrochemical reduction (CO2ER) to CO. The reaction follows the Eley-Rideal mechanism and only requires a single active site.
Article
Plant Sciences
M. M. Aci, A. Lupini, A. Mauceri, F. Sunseri, M. R. Abenavoli
Summary: The study revealed that under short-term nitrate limiting supply, the genotype RO showed higher nitrate storage and remobilization abilities compared to UC82, while under long-term limiting conditions, the two genotypes exhibited differential gene expression levels related to nitrate assimilation and allocation. These results suggest that the Nitrogen Utilization Efficiency component plays a central role in enhancing Nitrogen Use Efficiency in tomato plants.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Chang-Qiu Guo, Chuan-Jun Lu, Li-Wen Zhan, Peng Zhang, Qi Xu, Jia Feng, Ren-Rong Liu
Summary: This study reports a new catalyst that successfully catalyzes the enantioselective coupling reaction between quinone esters and anilines, resulting in the formation of N-aryl quinone atropisomers with a unique intramolecular hydrogen bond. This method has the potential to be used for the synthesis of structurally diverse secondary amine atropisomers.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Chemistry, Multidisciplinary
Huan Meng, Ming-Shang Liu, Wei Shu
Summary: Organothianthrenium salts are compounds containing a positively charged sulfur atom and a neutral sulfur atom. They have unique structural characteristics and chemical behaviors, making them attractive precursors for forming new C-C and C-X bonds. The thianthrenation strategy allows selective transformation of C-H, C-O, and other chemical bonds into organothianthrenium salts, providing a straightforward alternative for functionalization of different compounds.
Article
Chemistry, Organic
Taweesak Gulchatchai, Thao Nguyen Thanh Huynh, Natthanan Vijara, Tanatorn Khotavivattana, Mongkol Sukwattanasinitt, Sumrit Wacharasindhu
Summary: A mild electrochemical oxidative cyclization using NaI as mediator and electrolyte under ambient temperature in a mixture of EtOH and H2O as solvent for the synthesis of flavones was developed. The reaction demonstrated broad substrate scope, scalability, ability to operate with benign solvent, and no requirement for strong oxidizing agents and external additives.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Applied
Yin-Hui Huang, Lin Dong
Summary: We developed a cost-effective cobalt-catalyzed electrochemical annulation to generate diversified novel complex dihydroisoquinolin derivatives from amides and alkenes in a simple and maneuverable undivided cell. The reaction proceeded C-H/N-H activation, and the catalyst was regenerated by anodic oxidation. Notably, the strategy of electrocatalysis avoided the consumption of stoichiometric chemical oxidants.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Organic
Ninglei Yang, Ming Dong, Xiaofeng Tong
Summary: This study reports a new method for the intramolecular reductive Heck reaction of vinyl iodide and oxime ether using Pd(0) catalyst and formic acid as the reductant. The research also reveals the crucial role of TsOH additive and (S)-SEGPhos ligand in promoting the reaction efficiency.
Article
Chemistry, Multidisciplinary
Amirhossein Hasanzadeh, Shahriyar Ghazanfari Holagh, Ata Chitsaz
Summary: This study proposes a non-isothermal electrochemical CO2 capture and storage system operating based on ethylenediamine and copper ions. The system is parametrically analyzed and optimized from an energy perspective, with the goal of minimizing total electrical work consumed by the system via genetic algorithm. The influence of CO2 concentration in exhaust gases on the system's performance is evaluated, showing optimized works achieved with extra heating loads supplied at temperatures below 90 degrees C.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Chemistry, Multidisciplinary
Subhradeep Dutta, Jae Hyun Kim, Kamal Bhatt, Dillon R. L. Rickertsen, Khalil A. Abboud, Ion Ghiviriga, Daniel Seidel
Summary: A new strategy utilizing imine-BF3 complexes to access alpha-functionalized alicyclic amines is presented. These complexes can be easily prepared and react with a variety of organometallic nucleophiles to form alpha-functionalized azacycles. The in situ preparation of imine-BF3 complexes allows for the direct synthesis of alpha-functionalized morpholines and piperazines from their parent amines.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Applied
Rohit Prajapati, Nao Tsunoji, Mahuya Bandyopadhyay, Rajib Bandyopadhyay
Summary: The modification of silicoaluminophosphates by amine functionalization or acid treatment for generation of mesoporosity leads to enhance the activity for CO2 utilization and conversion through cycloaddition reaction with epoxides. Post-synthetic -NH2 functionalization and acid treatment were used to modify SAPO-5 and SAPO-34 molecular sieves. The presence of -NH2 functionalities and hierarchical structure were confirmed by various analyses. These acid-treated and amine functionalized SAPO materials are cost-effective and environmentally benign due to their high recyclability.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hao Wang, Hoimin Jung, Fangfang Song, Shiyang Zhu, Ziqian Bai, Danye Chen, Gang He, Sukbok Chang, Gong Chen
Summary: N-N linkages are important in natural compounds, and a nitrene-mediated intermolecular N-N coupling reaction using iridium or iron catalysis provides a simple and efficient method to synthesize various hydrazides from readily available carboxylic acid and amine precursors. Mechanistic studies show that the nitrogen atom of Ir acyl nitrene intermediates serves as a strong electrophile and can form N-N bonds with high efficiency and chemoselectivity with the assistance of Cl···HN hydrogen bonding.
Article
Chemistry, Applied
Anna Chiara Vicini, Dike-Michel Alozie, Philippe Courtes, Giulia Roagna, Catherine Aubert, Victor Certal, Youssef El-Ahmad, Sebastien Roy, Veronique Gouverneur
Summary: This study demonstrates the scalability of hydrogen bonding phase-transfer catalysis for enantioselective nucleophilic fluorination and shows high conversion rates and thermal safety under specific conditions.
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2021)
Article
Chemistry, Multidisciplinary
Jianbo Liu, Matthew F. L. Parker, Sinan Wang, Robert R. Flavell, F. Dean Toste, David M. Wilson
Summary: The synthesis of N-trifluoromethyl amides from carboxylic acid halides and esters under mild conditions via isothiocyanates in the presence of silver fluoride at room temperature has been reported. This method desulfurizes isothiocyanates with AgF and then acylates the formed derivative to afford N-trifluoromethyl amides, including previously inaccessible structures. The strategy provides a platform for rapidly generating N-trifluoromethyl amides by virtue of the diversity and availability of both reaction partners and could find application in the modification of advanced intermediates.
Article
Materials Science, Multidisciplinary
Jung Sug Hong, Hee Jung Kim, Chang Hwun Sohn, Oh Yeong Gong, Jin Hyuk Choi, Kang Hee Cho, Gill Sang Han, Ki Tae Nam, Hyun Suk Jung
Summary: This study reports a novel synthesis of whitlockite and its application as a high-performing Pb2+ absorbent. The synthesized biomineral exhibits excellent Pb2+ absorption capacity and the absorbed Pb2+ ions can be recycled for the fabrication of perovskite solar cells.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Review
Chemistry, Physical
Anjana Rajeev, Mani Balamurugan, Muniyandi Sankaralingam
Summary: This review focuses on the distinctive methods of using transition metal complexes as catalysts for the oxidation of arenes, and presents the research on improving efficiency and selectivity through catalyst design strategies.
Article
Chemistry, Physical
Jia Bin Yeo, Jun Ho Jang, Jeong Eun Kim, Moo Young Lee, Young In Jo, Hyun Jae Kim, Ki Tae Nam
Summary: This study explored the coupling of anodic Lewis acid generation and cathodic production of formate from CO2 in a methanol electrolyte, resulting in the highest faradaic efficiency of 69% for methyl formate. Methyl formate was observed only when NaBF4 was used in an undivided electrochemical cell, while other sodium salts produced formic acid/formate.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Ho Hyeon Kim, Sang Won Im, Nam Heon Cho, Seungwoo Choi, Sungho Kim, Yae-Chan Lim, Ki Tae Nam
Summary: In this study, Pd nanoparticles with multiple types of low-Miller-index-faceted morphologies were synthesized by defining the synthesis conditions. The morphological evolution of Pd nanoparticles was observed by tracking the trajectory of the surface Miller indices. By precise control of the morphological trajectory, Pd nanoparticles with a new cuborhombicube morphology were discovered. This study provides important insights into the design of surface Miller indices and morphologies of functional nanomaterials.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Jeong Won Kim, Nam Heon Cho, Ryeong Myeong Kim, Jeong Hyun Han, Seungwoo Choi, Seok Daniel Namgung, Hyeohn Kim, Ki Tae Nam
Summary: This study demonstrates the manipulation of the polarization state of light using chiral plasmonic nanostructures, which exhibit a strong chiroptic response with magnetic controllability. By reversing the magnetic field direction, the circular dichroism values can be tuned. The study also reveals the magnetic circular dichroism peaks induced by the gap structure and size-related surface plasmon resonance.
Article
Multidisciplinary Sciences
Junsuke Yamanishi, Hyo-Yong Ahn, Hidemasa Yamane, Shun Hashiyada, Hajime Ishihara, Ki Tae Nam, Hiromi Okamoto
Summary: This study investigated the gradient force exerted on three-dimensional chiral nanoparticles by circularly polarized laser beams, revealing that the force depends on the handedness of the circular polarization of the trapping light and the particle chirality, influenced by the real part of the refractive index and perturbed electromagnetic field.
Article
Chemistry, Multidisciplinary
Jeong Hyun Han, Yae-Chan Lim, Ryeong Myeong Kim, Jiawei Lv, Nam Heon Cho, Hyeohn Kim, Seok Daniel Namgung, Sang Won Im, Ki Tae Nam
Summary: In this study, a deep learning algorithmic methodology was developed to predict and optimize the chiroptical response of chiral plasmonic sensors for precise determination of concentration and chirality. The neural networks designed and trained based on the understanding of the plasmonic nanodimer successfully predicted the chiroptical properties and inversely designed the plasmonic structure for achieving the desired circular dichroism. This research provides a general platform for the development of ultrasensitive chiral plasmonic sensors.
Article
Chemistry, Multidisciplinary
Minju Kim, Jiweon Kim, Hyun Jeong Lee, Hyeohn Kim, Ki Tae Nam, Dong Ha Kim
Summary: In this study, a general approach to fabricate chiral metal oxide nanostructures with tunable magneto-chiral effects using block copolymer inverse micelle and R/S-mandelic acid was reported. The study found that diverse chiral metal oxide nanostructures can be prepared by selective incorporation of precursors within micellar cores followed by the oxidation process, exhibiting intense chiroptical properties. This approach can also be used for mass production of chiral nanostructures with tunable architectures and optical activities.
Review
Chemistry, Multidisciplinary
Seungwoo Choi, Won Il Choi, Jun-Seo Lee, Chang Hyun Lee, Mani Balamurugan, Andrew D. Schwarz, Zung Sun Choi, Hyacinthe Randriamahazaka, Ki Tae Nam
Summary: Chloride oxidation is a crucial electrochemical process in chlorine-based chemical production and water treatment. Dimensionally stable anodes (DSAs) comprising RuO2- and IrO2-based mixed-metal oxides have been successfully commercialized. Efforts have been made to develop earth-abundant-metal-based electrocatalysts for sustainable supply of anode materials. This review discusses the history of commercial DSA fabrication, strategies to improve efficiency and stability, electrocatalytic performance, and progress in designing noble-metal-free anode materials.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sang Won Im, Eunjeong Jo, Ryeong Myeong Kim, Jeong Hyun Han, Ki Tae Nam
Summary: The symmetry of gold nanoparticles is closely related to their chiroptical responses. By inducing single or multiple twin planes in seed nanoparticles, the symmetry of gold nanoparticles can be modulated. 32-symmetric chiral gold nanoplates, referred to as 32 helicoids, are successfully synthesized and their growth mechanism is analyzed. This investigation provides an important insight into symmetry control in chiral plasmonic applications.
ADVANCED OPTICAL MATERIALS
(2023)
Editorial Material
Chemistry, Multidisciplinary
Ki Tae Nam, Hyuck Choo, Deoksin Kil, Chul-Hong Kim, Cheolmin Park, Woon-Ryeol Yu
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hyeohn Kim, Eunji Im, Ryeong Myeong Kim, Nam Heon Cho, Jeong Hyun Han, Hyo-Yong Ahn, Ji-Hyeok Huh, SeokJae Yoo, Seungwoo Lee, Ki Tae Nam
Summary: Large-area metal-insulator-metal (MIM) resonators are demonstrated using non-lithographically assembled chiral gold nanoparticles (helicoids) and subsequent gold layer deposition, proving their boosted chiroptical responses at the visible regime. The strength of capacitive coupling can be precisely tuned by the thickness of the topcoat Au and the dielectric gap. Numerical analysis supports that the optimally tuned capacitive coupling in the chiral MIM structure enhances both electric and magnetic dipolar resonances and brings their spectral positions closer.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Won Il Choi, Seungwoo Choi, Mani Balamurugan, Sunghak Park, Kang Hee Cho, Hongmin Seo, Heonjin Ha, Ki Tae Nam
Summary: This study reports the synthesis of Co3O4 nanoparticle (NP) catalysts by a hydrothermal method. Ru was successfully incorporated into the Co3O4 NPs for improved catalytic performance in chlorine generation. The addition of Ru enhanced structural disorder and changed the electronic state, resulting in additional exposed active sites. The Ru0.09Co2.91O4 NP electrode exhibited outstanding stability, showing its commercial viability for active chlorine generation even at high current densities.
Article
Chemistry, Multidisciplinary
Jia Bin Yeo, Jun Ho Jang, Young In Jo, Jeong Woo Koo, Ki Tae Nam
Summary: Utilizing CO2-derived formaldehyde derivatives for fuel additive or polymer synthesis can greatly reduce net carbon dioxide emissions. This study proposes a new electrochemical approach to simultaneously generate formaldehyde derivatives at both electrodes by partially oxidizing methanol and directly reducing CO2. The activation and stabilization of formic acid and formaldehyde in methanol solvent enable the generation of formaldehyde derivatives at the cathode alongside the anode.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)