Article
Chemistry, Physical
Neha Antil, Naved Akhtar, Rajashree Newar, Wahida Begum, Ajay Kumar, Manav Chauhan, Kuntal Manna
Summary: The development of efficient and enantioselective heterogeneous catalysts based on abundant elements and inexpensive ligands is crucial for environmentally friendly and cost-effective production of optically active compounds. This study demonstrates the synthesis of chiral amino alcohol-functionalized metal-organic frameworks as highly enantioselective base-metal catalysts for asymmetric organic transformations.
Review
Chemistry, Multidisciplinary
Shovan Mondal, Frederic Dumur, Didier Gigmes, Mukund P. Sibi, Michele P. Bertrand, Malek Nechab
Summary: Benefiting from the increase in fundamental knowledge, there has been a continuous burst of new ideas and catalytic methods for enantioselective radical reactions in the past 20 years. This review provides a comprehensive survey of the progress achieved during this period, focusing on chiral organocatalysts and transition-metal redox catalysis. The review also discusses the merger of photocatalysis with organo- or metalla-photocatalysis and enzyme-catalyzed reactions involving radical intermediates.
Review
Polymer Science
Takuya Isono
Summary: This focused review provides an overview of recent work and related research on the precise anionic ring-opening polymerization (AROP) of substituted epoxides using t-Bu-P-4 as the phosphazene base catalyst to produce functional polyethers. The fundamental aspects and applicable monomer scope of the t-Bu-P-4-catalyzed AROP are discussed, followed by applications of the AROP system for synthesizing functional materials and architectural polymers.
Article
Chemistry, Multidisciplinary
Ge Yang, Wenwen Shi, Yunyang Qian, Xiao Zheng, Zheng Meng, Hai-Long Jiang
Summary: This study successfully achieved heterogeneous enantioselective catalysis by modulating the chiral microenvironment around Lewis acid sites in solid-phase catalysts. Chiral metal-organic frameworks (MOFs) were synthesized by anchoring chiral hydroxylated molecules onto Zr-oxo clusters in achiral PCN-222(Cu). The resulting chiral MOFs exhibited regulated enantioselectivity of up to 83% ee in the asymmetric ring-opening of cyclohexene oxide. The chiral molecules created a multilevel microenvironment around the catalytic sites in the MOF, which played crucial roles and synergistically promoted chiral catalysis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Polymer Science
Hanghang Wang, John Michael O. Cue, Erika L. Calubaquib, Ruvanthi N. Kularatne, Somayeh Taslimy, Justin T. Miller, Mihaela C. Stefan
Summary: This review explores the stereospecific polymerization of dienes, vinyl monomers, and epsilon-caprolactone using various neodymium catalysts.
Article
Chemistry, Applied
Danyu Wang, Zhe Li, Tian-Yi Luo, Michael B. Schmithorst, Sunghwan Park, Wenqian Xu, Yurun Miao, Kaivalya Gawande, Chaoyun Tang, Brandon C. Bukowski, Bradley F. Chmelka, Howard Fairbrother, Efrosini Kokkoli, Michael Tsapatsis
Summary: Adenosine triphosphate (ATP) and other nucleotides can be irreversibly bound to the metal-organic framework (MOF) MIL-101(Cr). Analysis suggests that ATP is bound to MIL-101(Cr) through the terminal phosphate group with Cr(III) of the framework. The MOF-supported nucleotides can function as stable and reusable enantioselective heterogeneous catalysts in the presence of Cu(II) ions.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Polymer Science
Chinh-Hoang Tran, Min-Woong Lee, Soo-Jeong Lee, Jin-Hyeok Choi, Eun-Gyeong Lee, Ha-Kyung Choi, Il Kim
Summary: A series of heterogeneous Zn-Co double metal cyanide (DMC) catalysts were investigated for ring-opening polymerization (ROP) of various cyclic monomers. It was found that inexpensive and commonly used organic solvents were effective complexing agents for the preparation of DMC catalysts, which showed high catalytic activity for the ROP of propylene oxide, epsilon-caprolactone, and delta-valerolactone. The chemical structures and compositions of the catalysts were determined using various techniques, and alpha, omega-hydroxyl-functionalized polyether and polyester polyols with high yields and tunable molecular weights were successfully synthesized in the presence of different initiators. Kinetic studies of the ROP of delta-valerolactone were also conducted to confirm the reaction mechanism.
Article
Chemistry, Physical
Philipp S. Steinlandt, Xiulan Xie, Sergei Ivlev, Eric Meggers
Summary: A class of stereogenic-at-iron catalysts has been introduced for asymmetric 3d-transition metal catalysis. These catalysts have shown high yield and high enantioselectivity. The coordination and dynamics of the ligands were studied using NMR spectroscopy.
Review
Chemistry, Multidisciplinary
Silvia Cattani, Gianpiero Cera
Summary: Iron-catalyzed C-H activation is an economical and efficient synthetic method with the advantages of low cost and low toxicity. This review presents the most recent examples of iron-catalyzed C-H functionalizations, focusing on modern synthetic strategies and mechanistic aspects. Iron-catalyzed C-H activation has great potential for sustainable development in organic chemistry.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
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, Multidisciplinary
Yingluo Zhao, Hiroko Kawano, Hiroshi Yamagishi, Saya Otake, Yoshimitsu Itoh, Hubiao Huang, E. W. Meijer, Takuzo Aida
Summary: In this article, we report the complex pathway complexity in thesupramolecular polymerization of a chiral monomer, which exhibits an anomalous chiroptical feature. Through AgBF4-mediated supramolecular polymerization, we developed a planar-chiral ferrocene-cored tetratopic pyridyl monomer FcL, leading to the formation of nanotubes composed of metal-organic nanorings (FcNTs). The formation of homochiral nanorings (FcNRs) was observed even from racemic FcL, suggesting the existence of two competing pathways for producing FcNRs in the polymerization process.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Polymer Science
Jintao Li, Mingzu Zhang, Jinlin He, Peihong Ni
Summary: In this study, the anionic homopolymerization, random and block copolymerizations of several vinyl monomers were explored in deep eutectic solvent (DES). The microstructures and molecular weights of the polymers were characterized, and their thermal properties were investigated. The results showed that DES can be used to prepare polymerization products with desired characteristics, and it can be recycled for multiple reactions without affecting the final product. The use of DES as a reaction medium for anionic polymerization offers milder reaction conditions and expands the application of active organolithium reagents.
EUROPEAN POLYMER JOURNAL
(2023)
Review
Engineering, Environmental
Devina Thasia Wijaya, Chan Woo Lee
Summary: This review discusses the recent advances in MOF-based electrocatalysts for CO2 reduction, highlighting the versatility and tunability of MOFs. Various transformations and modifications applied to MOFs are summarized to emphasize their potential as a multifunctional synthesis platform. Future research directions for achieving more rational MOF design and synthesis, as well as the reported catalytic performances, are discussed.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Xu Chen, Zhiwei Qiao, Bang Hou, Hong Jiang, Wei Gong, Jinqiao Dong, Hai-Yang Li, Yong Cui, Yan Liu
Summary: Metal-organic frameworks (MOFs) have shown great potential in heterogeneous catalysis, and the enantioselectivities of chiral MOF (CMOF) catalysts can be significantly enhanced by designing metals and ligands, resulting in improved chiral catalytic reactions.
Review
Chemistry, Inorganic & Nuclear
Qilu Yao, Xiaolei Zhang, Zhang-Hui Lu, Qiang Xu
Summary: This article outlines the significant progress achieved in metal-organic framework (MOF) and its composites and derivatives toward catalytic hydrogen production from liquid-phase chemical hydrides. The synthesis methods, advanced characterization, and catalytic activities of MOF-based catalysts in hydrogen production are introduced, followed by a brief summary and prospect of the opportunities and challenges for future development.
COORDINATION CHEMISTRY REVIEWS
(2023)
