Review
Chemistry, Multidisciplinary
Justus Diekamp, Thomas Seidensticker
Summary: The recycling of homogeneous catalysts in a homogeneous matrix is a challenging task for many reactions aiming for industrial applications. Although various synthetic approaches for recyclable homogeneous catalysts exist, a concise overview of catalyst modifications is lacking in the literature. This review aims to fill this gap by summarizing the existing synthesis pathways for polar, non-polar, fluorous, and molecular-weight-enlarged catalysts and examining their modular and late-stage approaches. Additionally, the potential for a generally applicable tag library to facilitate catalyst modifications for specific recycling strategies is explored.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Chance M. Boudreaux, Dinesh Nugegoda, Wenzhi Yao, Nghia Le, Nathan C. Frey, Qing Li, Fengrui Qu, Matthias Zeller, Charles Edwin Webster, Jared H. Delcamp, Elizabeth T. Papish
Summary: Low-valent cobalt complexes with phosphine substitution have been synthesized and shown to be highly active catalysts for photocatalytic CO2 reduction.
Article
Polymer Science
Zehra Syeda, Hsing-yin Chen, Man-kit Leung
Summary: Polyethylene terephthalate (PET) is a vital component in daily life, but its resistance to degradation has led to environmental disaster. This study presents a glycolysis method using amino alcohols (AmOH's) to efficiently recycle PET into oligoethylene terephthalate (OET) with high yields. The OET can then be used to produce PET, completing the PET-to-PET cycle. The study also compares the efficiency of different AmOH's and provides insights into their role in the degradation process.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Nanoscience & Nanotechnology
Lipipuspa Sahoo, Sanjit Mondal, Nayana Christudas Beena, A. Gloskovskii, Unnikrishnan Manju, D. Topwal, Ujjal K. Gautam
Summary: Efficient recovery of noble metal nanocrystals for organic transformations has been a challenge, but in this study, highly catalytic Pd nanoparticles were successfully prepared and embedded in mechanically robust polyurethane foam for effective and recyclable use. The Pd-PUF showed negligible leaching and maintained activity over multiple catalytic cycles, demonstrating its potential for industrial applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Inorganic & Nuclear
Shumpei Akita, Jing-Yao Guo, Falk W. Seidel, Matthew S. Sigman, Kyoko Nozaki
Summary: In this study, the impact of ligands in palladium complexes on the copolymerization of ethylene and methyl acrylate was analyzed using a statistical method. The electron density on the palladium center and the maximum width of the substituents on the phosphorus atom were found to be significant factors affecting the catalyst performance. Additionally, features such as the occupancy of the palladium d(z)(2) orbital and the bite angle of the ligand were shown to influence the reaction outputs. The experimental results were not always consistent with the predictions, possibly due to insufficient training data for certain catalysts. However, the unexpected finding that chlorination of the ligand backbone improved the overall catalyst performance provides inspiration for the development of PS catalysts.
Article
Chemistry, Multidisciplinary
Jianhua Song, Xiaoping Wang, Lin Xu, Chonghao Chen, Dianhua Liu
Summary: The efficient homogenous catalysis and spontaneous heterogeneous separation of Pd-catalyzed alkoxycarbonylation have been achieved using a rationally designed natural metabolite based acidic deep eutectic solvent (DES) as an acid co-catalyst. This approach improves the catalyst lifespan and operational efficiency.
Review
Chemistry, Multidisciplinary
Ashish Bohre, Prashant Ram Jadhao, Komal Tripathi, Kamal Kishore Pant, Blaz Likozar, Basudeb Saha
Summary: Chemical recycling is a commonly used method to transform post-consumer PET into building block chemicals, reducing plastic waste in landfills. Recent advancements in material science and catalysis have led to innovative strategies for PET depolymerization under mild reaction conditions. Heterogeneous catalysts have shown great potential for converting waste PET into monomers and value-added chemicals.
Article
Chemistry, Organic
Jixing Lai, Juan Yang, Chen Yang, Rene Csuk, Baoan Song, Shengkun Li
Summary: The study reports the first palladium/chiral nitrogenous ligand-catalyzed enantioselective addition of aryl boronic acids to various maleimides. The protocol features mild conditions and good functional group tolerance. The resulting 3-arylsuccinimides exhibit novel chiral antifungal activity and inspire the discovery of new ligands to address the challenging issues of this transformation.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Ling-Xia Yun, Hao Wu, Zhi-Gang Shen, Ji-Wen Fu, Jie-Xin Wang
Summary: In this study, defect-rich CeO2 nanoparticles were synthesized and used as catalysts for the glycolysis of PET, achieving efficient depolymerization at low temperatures. The small size and rich oxygen defects of the nanoparticles were found to greatly enhance the catalytic activity and accelerate the glycolysis reaction.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Organic
Bin Zhang, Xiao-Ming Zhang, Qing-Wei Zhang
Summary: Phosphine oxides and spirocyclic compounds are privileged molecules that are widely used in catalytic transformations as chiral ligands or bifunctional organocatalysts. In this study, a Pd-catalysed cross-coupling reaction was developed to synthesize spirocyclic amino-phosphine oxides with a P-stereogenic center, which could potentially serve as P*(O), N-ligands or organocatalysts.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Applied
Daniel Becker, Dirk Bockfeld, Matthias Tamm
Summary: In this study, two complexes were obtained by reacting the bidentate [P,N] ligand with [Ir(COD)Cl] and adding different ligands, and further reaction yielded a diiridium tetrahydride. Crystal structure analysis of the three complexes revealed that the position of the hydrogen atoms in one of the complexes could be refined freely. Since the first complex is a validated catalyst, the performance of the two complexes in deuterium labeling reactions was compared.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Physical
Maria Zubair, Syed Abdul Ahad, Ibrahim Saana Amiinu, Vasily A. Lebedev, Mohini Mishra, Hugh Geaney, Shalini Singh, Kevin M. Ryan
Summary: A simple and low-temperature colloidal hot injection approach is used to synthesize NaSbS2-based mixed ionic and electronic conductors (MIECs) with size-tunable nanocrystals. The synthesized materials have competitive conductivities and offer potential in energy storage applications.
NANOSCALE HORIZONS
(2023)
Article
Polymer Science
Jie Li, Yu Wang, Wen Cai, Gang Yang, Qiuhui Tian, Yongshuang Huang, Dan Peng, Chen Zou, Chen Tan
Summary: Dual-site molecular heterogeneous catalysts have gained attention for synthesizing polyolefin in-reactor blends. A self-supporting strategy based on nickel-catalyzed precipitation coordination polymerization was used to heterogenize and spatially distribute catalyst components in the particles. These polymeric heterogeneous catalysts exhibited higher activities, high molecular weights, good morphological control, and improved compatibility with polar materials. The composition and physical properties of the blend can be controlled by the molar ratio of the two catalytic components. Interestingly, different spatial distribution types resulted in significant differences in thermal, mechanical, and rheological properties and applications of the obtained blends.
Article
Chemistry, Multidisciplinary
Lanja R. Karadaghi, Noah Malmstadt, Kurt M. Van Allsburg, Richard L. Brutchey
Summary: Ionic liquids have emerged as popular alternatives to traditional organic solvents due to their unique properties, such as non-flammability and high chemical stability. However, their higher cost compared to conventional solvents poses a challenge in widespread adoption. Recycling of ionic liquids in nanoparticle synthesis has been shown to maintain product quality and potentially reduce costs, making them a competitive option for industrial applications.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Environmental Sciences
Lu Zhou, Jixian Yang, Fang Ma, Shanshan Pi, Aiqi Tang, Ang Li
Summary: The recovery of Pd from Pd(II) wastewater using microbial extracellular polymeric substances (EPS) and magnetic nanocomposite EPS@Fe3O4 was successful, showing excellent catalytic activity in methylene blue reduction. EPS@Fe3O4 proved to be an efficient adsorbent for Pd recovery, with high potential for practical applications.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Chemistry, Multidisciplinary
Mary L. Harrell, David E. Bergbreiter
JOURNAL OF CHEMICAL EDUCATION
(2017)
Article
Chemistry, Physical
Hind Mamlouk, Jakkrit Suriboot, Praveen Kumar Manyam, Ahmed AlYazidi, David E. Bergbreiter, Sherzod T. Madrahimov
CATALYSIS SCIENCE & TECHNOLOGY
(2018)
Article
Chemistry, Organic
Peerada Samunual, David E. Bergbreiter
JOURNAL OF ORGANIC CHEMISTRY
(2018)
Article
Polymer Science
Ying-Hua Fu, Sherzod T. Madrahimov, David E. Bergbreiter
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
(2018)
Article
Chemistry, Organic
Thomas J. Malinski, David E. Bergbreiter
TETRAHEDRON LETTERS
(2018)
Article
Chemistry, Multidisciplinary
Thomas J. Malinski, Hassan S. Bazzi, David E. Bergbreiter
Article
Polymer Science
Christopher B. Watson, Dustin Tan, David E. Bergbreiter
Article
Engineering, Chemical
Ying-Hua Fu, Camila Perales, Todd Eliason, David E. Bergbreiter
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
Article
Chemistry, Physical
Ying-Hua Fu, David E. Bergbreiter
Article
Engineering, Chemical
Katelynn J. Edgehouse, Neil Rosenfeld, David E. Bergbreiter, Emily B. Pentzer
Summary: Encapsulation of PAO(432) in polymer-based shells using Pickering emulsion stabilized by graphene oxide nanosheets and interfacial polymerization enables effective removal of various low molecular weight organic contaminants from water. The PAO(432) capsules show promise for applications in continuous extraction systems and removal of BTEX gases from air.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Katelynn Edgehouse, Nicholas Starvaggi, Neil Rosenfeld, David Bergbreiter, Emily Pentzer
Summary: This study investigates the impact of polymer shell composition on the uptake of small molecule dye, showing that small changes in capsule shell composition can lead to different performance in small molecule uptake, providing insights into tailoring shell composition for specific applications.
Article
Chemistry, Multidisciplinary
Christopher B. Watson, Adrianna Kuechle, David E. Bergbreiter
Summary: Homogeneous and heterogeneous sulfonic acid catalysts are commonly used in organic chemistry, but this study explores the use of recyclable polymeric solvent and soluble catalysts which show excellent recyclability in organic synthesis. The non-volatile solvent system and phase-anchored catalysts demonstrated effectiveness in esterifications, acetalizations, and multicomponent condensations, allowing for efficient product separation and recycling through distillation or self-separation.
Article
Chemistry, Organic
Sopida Thavornpradit, James M. Killough, David E. Bergbreiter
ORGANIC & BIOMOLECULAR CHEMISTRY
(2020)
Article
Polymer Science
Neil Rosenfeld, Chih-Gang Chao, Christopher B. Watson, Manyam P. Kumar, Sherzod T. Madrahimov, David E. Bergbreiter
JOURNAL OF POLYMER SCIENCE
(2020)
Article
Chemistry, Multidisciplinary
Xuemei Liu, Chaonan Cui, Shuoshuo Wei, Jinyu Han, Xinli Zhu, Qingfeng Ge, Hua Wang
Summary: This study presents a new strategy for designing efficient photocatalysts that can convert CO2 into hydrocarbons by utilizing synergistic catalytic sites. The findings provide a solution for the selective photocatalytic reduction of CO2 to CH4.
Article
Chemistry, Multidisciplinary
Chengxian Hu, Dan Wang, Lu Wang, Ying Fu, Zhengyin Du
Summary: A novel one-pot, three-component reaction conducted under electrochemical conditions was studied. The reaction involved 2-aminothiophenols, aldehydes, and malononitrile, using TBABF4 as an electrolyte and CuI as a catalyst. The proposed reaction mechanism suggested that CuI served as an electron relay. This method offers simplified operation, high atom economy, and mild reaction conditions.
Article
Chemistry, Multidisciplinary
Zhi Yang, Yu Chen, Linxi Wan, Yuxiao Li, Dan Chen, Jianlin Tao, Pei Tang, Fen-Er Chen
Summary: A highly enantioselective method for the complete hydrogenation of pyrimidinium salts using Ir/(S,S)-f-Binaphane complex as the catalyst was developed. This method provides easy access to fully saturated chiral hexahydropyrimidines, which are prevalent in many bioactive molecules. The reactions exhibit high yields and enantioselectivities under mild reaction conditions without additives. Successful application of this methodology in a continuous flow fashion further extends its practical utility.
Article
Chemistry, Multidisciplinary
Tina Jeoh, Jennifer Danger Nill, Wujun Zhao, Sankar Raju Narayanasamy, Liang Chen, Hoi-Ying N. Holman
Summary: In this study, the enzymatic hydrolysis of cellulose was investigated using real-time infrared spectromicroscopy. The spatial heterogeneity of cellulose was found to impact the hydrolysis kinetics. Hydration affected cellulose ordering, and Cel7A preferentially removed less extensively hydrogen bonded cellulose.
Article
Chemistry, Multidisciplinary
Tiphaine Richard, Walid Abdallah, Xavier Trivelli, Mathieu Sauthier, Clement Dumont
Summary: An effective method of grafting functionalities onto lignin based on glycerol carbonate has been developed using an efficient nickel-catalysed telomerisation reaction. This method allows lignin to have new reactive functions and reduces the glass transition temperatures of modified lignins, thereby expanding the application range of lignin-based resins.
Article
Chemistry, Multidisciplinary
Jing Qi, Xiyan Wang, Gan Wang, Srinivas Reddy Dubbaka, Patrick ONeill, Hwee Ting Ang, Jie Wu
Summary: This study presents a green and environmentally friendly approach for the synthesis of imides using electrocatalytic oxidation with H2O as the oxygen source. The method eliminates the need for toxic or expensive oxidants and achieves high yields under mild reaction conditions. It shows broad substrate compatibility and potential for industrial applications.
Article
Chemistry, Multidisciplinary
Babasaheb Sopan Gore, Lin-Wei Pan, Jun-Hao Lin, Yi-Chi Luo, Jeh-Jeng Wang
Summary: Here, we report a visible light-promoted intramolecular radical cascade reaction for the construction of fluorenol and naphthalene-fused cyclopropyl carbaldehyde derivatives. This method offers mild reaction conditions, a broad substrate scope, excellent step efficiency, and scalability, without the need for external chemical oxidants. The novelty of this protocol was demonstrated by synthesizing chrysene analogs and performing late-stage functionalizations.
Article
Chemistry, Multidisciplinary
Juho Antti Sirvio, Idamaria Romakkaniemi, Juha Ahola, Svitlana Filonenko, Juha P. Heiskanen, Ari Ammala
Summary: This article discusses the method of using supramolecular interaction between an aromatic hydrogen bond donor and lignin to achieve rapid delignification of softwood at low temperatures.
Article
Chemistry, Multidisciplinary
Yunyan Meng, Chunxiang Pan, Na Liu, Hongjiang Li, Zixiu Liu, Yao Deng, Zixiang Wei, Jianbin Xu, Baomin Fan
Summary: A novel visible light-driven synthesis method for 2,3-diamines has been developed, which has mild conditions, avoids the use of metal reagents, and can synthesize diamines and diols in one pot.
Article
Chemistry, Multidisciplinary
Mingqing Huang, Haiyang Huang, Mengyao You, Xinxin Zhang, Longgen Sun, Chao Chen, Zhichao Mei, Ruchun Yang, Qiang Xiao
Summary: A direct air-oxidized strategy for the synthesis of benzo[b]phosphole oxides was developed in this study. Arylphosphine oxides were transformed into phosphinoyl radicals, which were further combined with various alkynes to achieve the desired products. DFT calculations revealed the mechanism of phosphinoyl radical formation.
Article
Chemistry, Multidisciplinary
Anwei Wang, Jiayin Huang, Chunsheng Zhao, Yu Fan, Junfeng Qian, Qun Chen, Mingyang He, Weiyou Zhou
Summary: This study demonstrates an innovative strategy for the aerobic oxidation of C(sp(3))-H bonds using gamma-valerolactone. By optimizing the reaction conditions and utilizing specific catalysts, efficient oxidation of C(sp(3))-H bonds is achieved with good chemoselectivity in certain cases.
Article
Chemistry, Multidisciplinary
Shun Li, Likai Tong, Zhijian Peng, Bo Zhang, Xiuli Fu
Summary: Sulfide compounds show promise as electrocatalysts for water splitting, but their performance is limited by factors such as limited active sites and hindered substance transport. This study successfully prepared a high-entropy sulfide (ZnCoMnFeAlMg)(9)S-8, which reduced grain size and increased specific surface area, enabling the realization of a dual-functional catalyst with multiple catalytic sites. High entropy also modulated the electronic properties of sulfides, reducing the potential energy barrier for hydrolysis. This research introduces a new approach for functionalizing high entropy nanomaterials and improves the performance of water splitting catalysts.