Article
Engineering, Chemical
Yifan Jiang, Bingqi Xie, Jisong Zhang
Summary: This study systematically investigated the application of a heterogeneous palladium catalyst based on activated carbons (AC) in the Suzuki-Miyaura reaction of aryl halides with phenylboronic acid. The variations of reaction processing were studied using batch and continuous-flow procedures. The heterogeneous catalysts exhibited excellent reactivity and recyclability in batch mode, but significant dehalogenation and Pd leaching were observed in continuous-flow mode, leading to a decline in reaction selectivity and durability of the catalysts. Additionally, the reactivity and durability of the heterogeneous Pd catalysts with thiol-and amino-modified AC supports differed in batch and continuous-flow mode due to the difference in interaction between Pd species and AC supports.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Inorganic & Nuclear
Saphan O. Akiri, Stephen O. Ojwach
Summary: The reactions of different ligands with Pd(OAc)(2) resulted in the formation of various palladium(II) complexes, some of which exhibited good catalytic activity and selectivity in the methoxycarbonylation of 1-hexene, depending on the steric hindrance around the coordination center. Water-soluble complexes displayed similar catalytic behavior to non-water soluble systems and could be recycled multiple times with minimal changes in catalytic activities and regio-selectivity.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Andrija Kokanovic, Vladimir Ajdacic, Natasa Terzic Jovanovic, Slavica Stankic, Igor M. Opsenica
Summary: In this study, a highly active and versatile Pd/chemical vapor synthesis-ZnO (Pd/CVS-ZnO) catalytic system was synthesized and applied. The catalyst was prepared in two steps, involving the chemical vapor synthesis of ultrapure ZnO nanotetrapods, followed by the liquid-phase in situ reduction of a Pd precursor and deposition of Pd nanoparticles. The catalyst showed excellent activity in four chemical reactions, including Suzuki-Miyaura cross-coupling, reduction of nitroarenes, decarbonylation, and hydrodebromination of aromatic compounds.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kevin H. Shaughnessy
Summary: Nucleosides are important building blocks in biochemistry and have various applications in material synthesis and pharmaceuticals. Palladium-catalyzed cross-coupling reactions have proven to be effective methods for covalent modification of nucleosides and their derivatives under mild conditions. These methods have been successfully extended to nucleotides and oligonucleotides, and have been demonstrated in biocompatible systems.
Article
Chemistry, Physical
Selbi Keskin, Meryem Citlakoglu, Serdar Akbayrak, Serdal Kaya
Summary: This study successfully prepared magnetically separable Pd/NiFe2O4 catalysts and demonstrated their high activity and reusability in Sonogashira cross-coupling reactions. The catalyst exhibited excellent turnover frequency values in ethanol and showed high activity even in water. Additionally, the catalyst maintained its high catalytic performance even after ten uses in the reaction.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Polymer Science
Do Yeob Kim, Dong Gyu Kim, Bongjin Jeong, Young Il Kim, Jungseok Heo, Hyung-Kun Lee
Summary: In this paper, a luminescent coordination polymer particle (CPP) that can selectively and sensitively respond to phosphate ions in an aquatic ecosystem is reported. The CPPs, embedded into membranes for reuse, exhibit consistent luminescence signals in different pH ranges. The practical application of the sensor is confirmed by detecting phosphate in actual environmental samples.
Article
Engineering, Chemical
Saphan O. Akiri, Markus Schmitz, Stephen O. Ojwach
Summary: This paper describes the use of immobilized palladium catalysts on Fe3O4 magnetic nanoparticles for the methoxycarbonylation of 1-hexene. The immobilized Pd(II) complexes showed good catalytic activity and could be recycled multiple times without significant loss.
Article
Chemistry, Inorganic & Nuclear
Ntombizonke P. Ngubane, Saphan O. Akiri, Bernard Omondi, Stephen O. Ojwach
Summary: This article reports the synthesis of a series of complexes [Pd(L1)2] (Pd1), [Pd(L2)2] (Pd2), [Pd(L3)2] (Pd3), [Pd(L4)2] (Pd4), [Pd(L5)2] (Pd5) and [Pd(L6)2] (Pd6) using Pd(OAc)2 as the precursor. The characterization of chemical structures and catalytic performances of these complexes revealed their excellent catalytic activity and selectivity in the methoxycarbonylation of olefins.
Article
Chemistry, Inorganic & Nuclear
Mohammad Gholinejad, Mohammad Shojafar, Jose M. Sansano, Vladimir N. Mikhaylov, Irina A. Balova, Rahimeh Khezri
Summary: This article presents a new nitrogen-rich hyperbranched polymer PolyTZ-IL@Pd NPs used for stabilizing Pd nanoparticles, showing efficient catalytic performance in the reduction of nitroarenes and cyanation of aryl bromides and iodides.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Hangyu Liu, Liyu Chen, Chun-Chao Hou, Yong-Sheng Wei, Qiang Xu
Summary: The study successfully encapsulated metal nanoparticles into soluble porous carbon cages using a silica-shelled metal-organic framework pyrolysis approach, showing high solubilities and excellent dispersibilities in solvents (water and alcohol), with excellent O-2 and H-2 generation rates. The as-prepared catalysts exhibit top-level turnover frequencies in hydrogen peroxide and ammonia borane hydrolysis, demonstrating excellent stability and durability due to the stable structure and effective confinement of SPCCs.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Inorganic & Nuclear
Heeyoel Baek, Takuma Sato, Yasuhiro Uozumi, Yoichi M. A. Yamada
Summary: Highly reusable and active silicon-nanowire-array-stabilized metal-nanoparticle (SiNA-MNP) catalysts have been prepared for effective hydrogenation under mild conditions. Monometallic and bimetallic nanoalloy catalysts were synthesized without the need for a reducing agent or other external factors, showing robust stability and high reusability. Characterization of the catalysts was conducted using various techniques, and the catalytic activity was evaluated through hydrogenation of trans-stilbene in a hydrogen atmosphere.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Adam Prekob, Mahitha Udayakumar, Gabor Karacs, Ferenc Kristaly, Gabor Muranszky, Anett Katalin Lesko, Zoltan Nemeth, Bela Viskolcz, Laszlo Vanyorek
Summary: The study focuses on synthesizing glassy carbon foam (GCF) catalyst supports from waste polyurethane elastomers and conducting pyrolysis and activation experiments using different gases. Palladium nanoparticles were highly dispersed, and the activated supports showed improved catalytic activity with higher hydrogenation rates.
Article
Polymer Science
John Marc C. Puguan, Pramod V. Rathod, Pawan P. More, Hern Kim
Summary: A new electroactive polythiopene derivative with enhanced solubility was synthesized through copolymerization, featuring a unique chemical structure and good solubility in solvents.
Article
Electrochemistry
Chenchen Yang, Yan Jiang, Feng Chen, Jianwei Zhao
Summary: With its high theoretical capacity, silicon has great potential as an anode material for next-generation lithium-ion batteries. However, the volume changes and pulverization of silicon electrodes during charge-discharge processes pose challenges. To address this issue, researchers developed a novel Si-anodic elastic polymer binder system based on cross-linked hyperbranched polyethyleneimine (HPEI) with optimized cross-linker length, which achieved a good balance between mechanical elasticity and bonding reversibility. The resulting Si anode exhibited high discharge capacity and excellent cycling stability.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Guiping Zhu, Xiaoyu Ma, Qilan Huang, Lingling Zhao, Ru Zhang, Xiangjun Yang, Shixiong Wang
Summary: A green aqueous two-phase system (ATPS) composed of a guanidinium ionic liquid (GIL) and phosphate was constructed and used to extract palladium from an acidic solution. The results show that up to 100% of Pd(II) efficiently migrates from the lower salt-rich phase to the upper GIL-rich phase. Various characterization methods reveal the mechanism of palladium distribution in the GIL-rich phase, and palladium can be successfully recovered from the GIL-rich phase.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Engineering, Environmental
Cong Cheng, Yan Gao, Weihua Song, Qiang Zhao, Haisong Zhang, Hailei Zhang
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Polymer Science
Yan Gao, Haisong Zhang, Yanbo Zuo, Weihua Song, Libin Bai, Hailei Zhang, Hongjie Wang, Yonggang Wu, Xinwu Ba
Summary: The development of orally administered phosphorus binding agent is crucial for the treatment of chronic kidney disease. This study successfully prepared an allylamine-grafted cellulose as a potential candidate, showing high phosphorus binding capacity and stability in acid and oxidation environments. In vivo experiments demonstrated its effectiveness in reducing serum phosphate levels, highlighting its potential as a promising oral phosphorus binding agent with low gastrointestinal discomfort.
Article
Chemistry, Physical
Jie Dong, Xin Wen, Tianli Zhu, Jingru Qin, Zhilei Wu, Ligong Chen, Guoyi Bai
MOLECULAR CATALYSIS
(2020)
Article
Engineering, Environmental
Zhiyi Su, Hailei Zhang, Yan Gao, Li Huo, Yonggang Wu, Xinwu Ba
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Polymer Science
Qian Zhou, Yuangong Zhang, Liping Fang, Hao Guan, Xin Wen, Yonggang Wu, Xinwu Ba, Libin Bai
Summary: A facile strategy was used to synthesize hyperbranched polymers in one pot by free radical polymerization and coupling of -OH groups and -NCO groups. The molecular parameters of the polymers can be tuned by adjusting reaction conditions and feed ratios. The polymers showed promising performance in terms of loading capacity, biodegradability, and ability to inhibit enzyme fibrillation, suggesting their potential broad applications in the biochemical field.
Article
Nanoscience & Nanotechnology
Qiang Zhao, Hanxi Jiang, Boyan Tang, Yonggang Wu, Xinwu Ba, Hailei Zhang
Summary: A smart tool for simultaneous detection and removal of hypochlorite (ClO-) in water was prepared using halloysite nanotubes (HNTs) as the scaffold. The nanocomposite showed high selectivity and excellent dispersibility in water, paving a path in water quality monitoring and treatment.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Zhaowei Li, Xin Wen, Haichao Liu
Summary: This study demonstrates the efficient conversion of citric acid to high-value organic acids using acidic and etching-resistant monoclinic zirconium dioxide catalyst. The bifunctional catalysts show excellent performance in the selective conversion of citric acid to different organic acids. These findings provide insights for the green production of important carboxylic acids.
Article
Materials Science, Composites
Jianceng Shi, Hailei Zhang, Bo Zhang, Yu Wang, Libin Bai, Yonggang Wu, Xinwu Ba
Summary: This study developed a facile approach to construct nest-like microspheres and demonstrated their desirable microwave absorption ability. By using halloysite nanotube (HNT) as the starting material, the size of the microspheres can be well controlled. The obtained nest-like microspheres anchored with silver nanoparticles exhibited high-performance microwave absorption, providing a simple method to construct 3D nest-like microspheres.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Yan-Li Ji, Kai Zhang, Jin-Lin Wang, Zhuang-Zhuang Liu, Xin Wen, Cong-Jie Gao
Summary: A nanoparticle-polymer reticulation strategy is used to fabricate porous organic polymer (POP) nanochannel membranes with a relatively large area. The fabricated membrane shows high water permeance, dye/salt selectivity, fouling resistance, and antibacterial properties. This study may lead to a paradigm shift in engineering POP nanomaterials and constructing advanced separation membranes.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Kexin Liu, Aiqing Wang, Yannan Mao, Zengli Jia, Yatao Su, Xin Wen
Summary: The interaction between metal and support plays a crucial role in the activity and selectivity of supported metallic nanoparticles. In this study, imidazolium-based porous polymers were synthesized and used as supports for the synthesis of ultra-small and narrow dispersed Pd nanoparticles. The optimized catalyst displayed high selectivity for styrene in alkyne semi-hydrogenation under ambient conditions. The interaction between imidazolium-based porous polymers and Pd, as well as the mesoporous structure, played important roles in enhancing the alkene selectivity and stabilizing Pd nanoparticles.
MOLECULAR CATALYSIS
(2023)
Article
Chemistry, Physical
Yatao Su, Xiu Wang, Qianwen Lin, Qi Shen, Shuangwen Xu, Liping Fang, Xin Wen
Summary: A nickel-based catalytic system combining NiCl2 center dot 6H(2)O, sodium borohydride and mercapto-beta-cyclodextrin (CD-SH) has been developed for the semi-hydrogenation of alkynes to E-alkenes, exhibiting high efficiency and good E-selectivity at room temperature. The system's high efficiency is attributed to the active H delta- (NaBH4), H delta+ (methanol), and in situ formed Ni nanoparticles, as well as the host-guest interaction between CD-SH and Z-alkene intermediate. Kinetic and mechanistic studies reveal that the E-alkene is obtained through efficient Z-selective semi-hydrogenation followed by sulfur-radical mediated Z-to-E isomerization. This study offers a cheaper, efficient, and practical strategy for improving the activity and selectivity of E-selective semi-hydrogenation of alkynes.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Yelong Lu, Hongchi Zhao, Xinrong Huang, Di Hu, Yonggang Wu, Xinwu Ba, Hailei Zhang
Summary: In this study, maleimide-functionalized halloysite nanotubes were explored as a nanophotoinitiator for controllable grafting of vinyl monomers. The obtained nanotubes were then used in a 3D printing system to fabricate hydrogels with desired configurations.
CHEMICAL COMMUNICATIONS
(2022)
Review
Polymer Science
Weihua Song, Jipeng You, Yuangong Zhang, Qi Yang, Jin Jiao, Hailei Zhang
Summary: H2O2-Gel is a promising hydrogel for biomedical applications due to its good biocompatibility and responsiveness to H2O2. This study reviews the different responsive moieties used in the fabrication of H2O2-Gel, discusses the preparation methods, and highlights its applications in drug delivery, detection, tissue engineering, and cell encapsulation.
Article
Chemistry, Multidisciplinary
Xin He, Xin Wen, Ke Wu, Haichao Liu
Summary: A novel route for the sustainable synthesis of Vinyl Methyl Ether (VME) from biomass-derived ethylene glycol dimethyl ether (EGDE) catalyzed by CaO-MgO catalyst at atmospheric pressure has been reported. The strongly basic sites on CaO-MgO surfaces facilitated the formation of VME, achieving high efficiency and stability. This work provides a viable and sustainable strategy for the synthesis of VME and other high-value vinyl compounds from biomass.
Article
Chemistry, Multidisciplinary
Yannan Mao, Yongqing Shi, Yatao Su, Qi Shen, Yuangong Zhang, Xianling Wang, Xin Wen
Summary: The research above synthesized a series of imidazolium-linked porous triazine polymers as catalyst supports, enabling the preparation of highly active and selective palladium nanoparticles catalysts for the selective oxidation of alcohols. Comprehensive characterizations revealed that the abundant imidazolium cations and triazine units in the supporting framework promoted the stability of the nanoparticles and enhanced catalytic activity. These findings suggest a viable strategy for the manufacture of highly active and stable catalysts for green alcohol oxidation.
