Article
Chemistry, Inorganic & Nuclear
Akinobu Naka, Shouta Yoshima, Mitsuo Ishikawa
Summary: The synthesis and platinum-catalyzed reactions of 2,3-bis(dimethylsilyl)pyridine are discussed, including the formation of a six-membered ring compound from dehydrogenative double silylation of diphenylacetylene. Reactivity towards monosubstituted acetylenes such as tert-butylacetylene, 1-hexyne, and phenylacetylene also leads to the formation of regioisomers of cyclic products.
INORGANICA CHIMICA ACTA
(2021)
Article
Engineering, Chemical
Eric Ziemann, Arindam Kumar Das, Paramita Manna, Revital Sharon-Gojman, Michal Sela-Adler, Charles Linder, Roni Kasher, Roy Bernstein
Summary: This study presents a facile method to fabricate crosslinked polyethersulfone membranes with remarkable stability in organic solvents. The performance of the membranes can be easily adjusted by controlling the polymer fraction. The weeklong filtration experiment highlights the excellent stability of the membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Feng Gao, Honggang Chang, Jinjin Li, Ruifeng Wang, Yanlong Gu
Summary: Contrary to the risks associated with traditional polar aprotic solvents, water has been considered an ideal alternative in organic synthesis due to its abundant supply and environmental compatibility. However, challenges such as low solubility of organic compounds and instability of water-incompatible catalysts hinder its practical use as a reaction medium. This review summarizes strategies to address these issues, including the use of task-specific surfactant-based catalysts and water-containing cosolvents, which offer a promising future for replacing hazardous polar aprotic solvents with water. Additionally, innovative technologies like biomimetic catalysis and continuous-flow reactions may pave the way for large-scale adoption of water as a solvent.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2023)
Article
Engineering, Environmental
Gyula Dargo, David Kis, Martin Gede, Sushil Kumar, Jozsef Kupai, Gyorgy Szekely
Summary: In this study, methyl sesamol (MeSesamol) is proposed as a promising bio-based alternative for polar aprotic solvents, and its versatile applications are demonstrated. MeSesamol, derived from natural resources using environmentally friendly and facile procedures, exhibits excellent properties as a green solvent candidate. It proves to be an effective solvent in various reactions and an excellent recyclable solvent in depolymerizations.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Ruixue Wang, Lei Zhang, Chenglong Zhang, Jingwei Wang, Jie Guan, Zhuming Jian, Yutao Bu
Summary: In this study, the selective extraction of precious metals from e-waste was achieved through simulation and experimentation using DMF as the solvent and Cl- ions as the oxidizing agent. The leaching and precipitation rates exceeded 98% under optimization conditions, and the waste liquid could be recycled. This research provides theoretical and practical experience for environmentally friendly recovery of precious metals from e-waste.
Article
Chemistry, Inorganic & Nuclear
Natasha E. Miner, Chip Nataro
Summary: The catalytic activity of [Au-2(mu-Cl)(mu-bis(phosphino)ferrocene)][BArF24] compounds was investigated for intermolecular hydroamination reactions and a carboxylative cyclization reaction, showing that the choice of the bis(phosphino)ferrocene ligand impacted the activity of the catalyst.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2022)
Article
Engineering, Chemical
Xinzhu Zhang, Tingyu Li, Zhi Wang, Jixiao Wang, Song Zhao
Summary: To overcome the challenges of swelling and dissolution of substrates in organic solvents, a reverse flexible-chain binding interfacial polymerization (rFB-IP) technique was proposed to fabricate solvent-resistant nanofiltration (SRNF) composite membranes using polytetrafluoroethylene (PTFE) substrates. The as-prepared rPA-PDMS/mPTFE composite membrane showed excellent stability and separation efficiency in polar aprotic solvents, making it a promising candidate for SRNF applications.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Maria Rosaria Plutino, Andrea Romeo, Maria Angela Castriciano, Luigi Monsu Scolaro
Summary: In this study, a cationic complex was used as a precursor to functionalize a multi-chromophoric system, resulting in an adduct with eighteen platinum(II) organometallic fragments. The coordination between the platinum(II) center and the pyridyl moieties of the porphyrin was confirmed through UV/vis and fluorescence titrations. Micrometer-sized emissive porphyrin rings were obtained by drop casting a diluted solution of the adduct onto a glass surface.
Article
Engineering, Chemical
Chao Han, Huan Liu, Yan Wang
Summary: This study presents a green process for the preparation of polymeric-based thin film composite (TFC) membrane with high permeance and superior solvent resistance in organic solvent nanofiltration (OSN) applications. Intrinsic insoluble polyimide (PI) nanofiber substrates were obtained by electrospinning of poly (amic acid) and subsequent thermal imidization. The optimized monomers contribute to a low-temperature imidization of PI nanofiber substrate. The resulting TFC OSN membrane showed high solvent permeance and rejection, along with good long-term stability.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Kenji Ota, Kazunori Nagao, Dai Hata, Haruki Sugiyama, Yasutomo Segawa, Ryosuke Tokunoh, Tomohiro Seki, Naoya Miyamoto, Yusuke Sasaki, Hirohisa Ohmiya
Summary: This study demonstrates a light-driven radical-polar crossover mechanism for the tertiary alkylation of phosphorus atoms in nucleotides, enabling the synthesis of alkylphosphonate structures that are difficult to obtain using existing methods.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Xiaokang Lv, Jun Xu, Cuiyun Sun, Fen Su, Yuanlin Cai, Zhichao Jin, Yonggui Robin Chi
Summary: Ferrocene-derived dicarbaldehydes with pro-chiral planes can be desymmetrized under the catalysis of chiral Nheterocyclic carbene organic catalysts, resulting in enantiomerically enriched planar chiral ferrocene products. The reaction selectively activates and reacts with one aldehyde moiety while leaving the other untouched. The obtained products show potential applications as catalysts in chemical synthesis and for antimicrobial activities in pesticide development.
Article
Chemistry, Multidisciplinary
Tingting Cai, Chao Liu, Jie Liang, Yan Ma, Jun Hu, Jianchun Jiang, Kui Wang
Summary: This study proposes a new perspective on the design of a biphasic system from a polar aprotic solvent (PAS) and saline water, based on the studies on intermolecular weak interactions. Molecular dynamics simulation reveals the formation mechanism of the biphasic system, and the stronger interaction of Na+ and Cl- with water is proven to be responsible for the dissociation of water from water-miscible gamma-valerolactone (GVL). The excellent extraction and stabilization of furfural (FAL) in the biphasic system can be attributed to the better interaction of PAS with FAL.
Article
Chemistry, Multidisciplinary
Farshid Effaty, Xavier Ottenwaelder, Tomislav Friscic
Summary: Mechanochemistry has evolved into a powerful tool for synthesizing molecules and materials without using bulk solvents. Through tailored instruments and well-understood milling techniques, researchers are tackling synthetic challenges of increasing complexity, including the use of catalysts to control reaction selectivity.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Jennifer Noro, Joana Cabo, David S. Freitas, Catarina S. Roque, Mariana de Castro, Artur Cavaco-Paulo, Carla Silva
Summary: In this study, three deep eutectic mixtures (DES) were used as mediums to synthesize glucose laurate and glucose acetate. Lipases from Aspergillus oryzae (LAO), Candida rugosa (LCR), and porcine pancreas (LPP) were employed as catalysts. The results showed that DES did not deactivate the lipases when used as medium. For transesterification reactions, combining LAO or LCR with DES 3 resulted in efficient production of glucose laurate, while LPP performed best in DES 2 for glucose acetate synthesis. Substituting vinyl laurate with vinyl acetate led to different behaviors, with LCR and LPP showing better catalytic activity in DES 1 for glucose acetate production. LAO had lower activity, with only around 40% product yield in DES 3. These findings highlight the potential of biocatalysis combined with greener solvents for the synthesis of differentiated sugar fatty acid esters.
Article
Chemistry, Inorganic & Nuclear
Karel Skoch, Constantin G. Daniliuc, Gerald Kehr, Gerhard Erker
Summary: Two different ferrocene derivatives reacted with hydroboration reagents, resulting in boron-containing cyclic compounds and further formation of dimeric bis-boron containing macrocyclic bridged bis-ferrocene systems with different structures.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
