Article
Chemistry, Multidisciplinary
Dnyaneshwar Purushottam Gholap, Ramdas Huse, Sudarshan Dipake, Machhindra K. K. Lande
Summary: In this study, solid heterogeneous silica supported lanthanum trifluoroacetate and trichloroacetate were developed as green Lewis acid catalysts. These catalysts were synthesized using a novel, simple, cheap, clean, and environmentally friendly method. The physicochemical properties of the catalysts were well studied and characterized using sophisticated spectroscopic techniques. The catalyst demonstrated high efficiency in the synthesis of arylimidazole derivatives under solvent-free conditions, with higher yields, mild reaction conditions, and short reaction times. It can be easily recovered and reused in both water and various organic solvents.
Article
Chemistry, Multidisciplinary
Adinath Tambe, Anil Gadhave, Akshay Pathare, Gopinath Shirole
Summary: In this study, a new heterogeneous catalyst pumice supported sulfonic acid (pumice@SO3H) was prepared and shown to be stable and possess good Brunsted acidic character. The catalyst showed efficient performance under microwave assistance for the synthesis of 2,4,5-triaryl imidazoles and acridine-1,8-diones, with features such as recyclability, solvent-free approach, and applicability to a wide range of substrates. The use of pumice@SO3H with MW has enhanced the green chemistry value of the method.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2021)
Article
Chemistry, Multidisciplinary
Sudarshan S. Dipake, Machhindra K. Lande, Anjali S. Rajbhoj, Suresh T. Gaikwad
Summary: The Zeolite ZSM-11 catalyst prepared by hydrothermal method showed good catalytic activity for the synthesis of 2,4,5-triarylimidazole derivatives. The catalyst has merits such as eco-friendly, ease of reusability and recovery, making it highly suitable for consecutive reactions.
RESEARCH ON CHEMICAL INTERMEDIATES
(2021)
Article
Chemistry, Multidisciplinary
Faranak Manteghi, Fatemeh Zakeri, Owen James Guy, Zari Tehrani
Summary: A chromium-containing metal-organic framework MIL-101 was effectively used as a heterogeneous catalyst for the solvent-free synthesis of 2,4,5-trisubstituted imidazoles, showing advantages such as high efficiency, reusability, and ease of isolation. The catalytic reaction achieved a high yield in a short time, making it a promising alternative to other catalysts.
Article
Chemistry, Physical
Iqra Ilyas, Ifra Bashir, Muhammad Akhyar Farrukh
Summary: The Fe2O3-CeO2 nanocomposite was synthesized using the co-precipitation method with the presence of SDS, and the effect of pH and temperature on its properties was studied; the synthesized nanocomposite showed high catalytic efficiency as a catalyst.
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Pritam Dolui, Vikas Tiwari, Parul Saini, Tarak Karmakar, Koushik Makhal, Harshita Goel, Anil J. Elias
Summary: An efficient, metal-free, catalyst-free and solvent-free method for the reductive amination of levulinic acid with different anilines has been developed using HBpin as the reducing reagent. This method provides an excellent approach to synthesize different N-substituted pyrrolidones without the need for solvents or added catalysts under metal-free conditions. It is also the first report on the synthesis of different pyrrolidones using solvent-free and catalyst-free methods. The proposed mechanism for pyrrolidone formation has been supported by DFT calculations and control experiments.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Engineering, Environmental
Dong Chen, Liang Wu, Siyang Nie, Pengfei Zhang
Summary: In this work, a facile method for the fabrication of high-efficiency N-doped carbon catalyst for the reduction of 4-nitrophenol was reported. The catalyst showed excellent performance with the introduction of N atoms, which enhanced electron transfer and promoted the adsorption of 4-NP ions, leading to high catalytic activity. This study not only provides a versatile strategy for preparing advanced N-doped carbon materials, but also offers useful guidance for designing and developing biomass-derived metal-free catalysts for various catalytic reactions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Yi Jiang, Hyeonjung Jung, Se Hun Joo, Qi Kun Sun, Changqing Li, Hyuk-Jun Noh, Inseon Oh, Yu Jin Kim, Sang Kyu Kwak, Jung-Woo Yoo, Jong-Beom Baek
Summary: Developing new linkage-based conductive COFs is a major focus in reticular chemistry due to their potential applications in energy storage. The solvent- and catalyst-free synthesis of ABBPM-COF shows promise in providing a chemically stable conductive material with semiconducting properties. The structure of ABBPM-COF, elucidated through various techniques, demonstrates its crystalline nature and excellent stability in various solutions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Energy & Fuels
Lina Zhou, Yue Du, Yongxu Jin, Wenxue Chen, Qiyun Pan, Wang Kai, Yisi Liu, Lun Yang, Zhenhui Liu
Summary: Mesoporous zirconia-supported tungsten oxide composites synthesized using polyethyleneimine as a porogen in a solvent-free self-assembly system exhibit excellent catalytic performance and stability in the oxidative desulfurization process, offering connected channels for reactants and a homogeneous distribution of tungsten oxide species on the mesoporous zirconia matrix.
Article
Chemistry, Multidisciplinary
Xiaoshen Bai, Divakar R. Aireddy, Amitava Roy, Kunlun Ding
Summary: Depolymerization of condensation polymers often requires solvents and homogeneous catalysts, but suffer from poor interfacial contact with solid plastics. This study discovers a spontaneous heterogeneous catalyst layer on the surface of polyethylene terephthalate during the homogeneous catalytic depolymerization process, and demonstrates that the construction of solid-plastic interfaces enables solvent-free depolymerization at relatively low temperatures. The introduction of trace amounts of zinc by electrostatic adsorption is sufficient for catalyzing the depolymerization. The concept of plastic-catalyst contact mass interfacial catalysis could inspire new approaches to address plastic waste problems.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Organic
Gopinath D. Shirole
Summary: A facile protocol has been established for the one-pot synthesis of 2,4,5-trisubstituted imidazoles derivatives via three-component condensation of 1,3-diaryl pyrazole aldehydes, benzil and ammonium acetate in the presence of catalytic amount of a ionic liquid [HNMP][HSO4] as an catalyst under solvent-free condition. The significant features of this protocol include high-atom economy, smooth work-up procedure, inexpensive catalyst, easy for handling, shorter reaction time, high yield, multi-component approach and solvent-free reaction.
HETEROCYCLIC LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Dnyaneshwar Purushottam Gholap, Ramdas Huse, Sudarshan Dipake, M. K. Lande
Summary: Silica supported iron trifluoroacetate and iron trichloroacetate green Lewis acid catalysts were developed for the synthesis of hexahydroquinoline-3-carboxamide derivatives. These catalysts showed excellent conversion efficiency and high product yield under solvent-free reaction conditions. They also exhibited reusable and recoverable properties, as well as good performance in water and various organic solvents. The current synthetic route offers advantages such as functional group tolerance, short reaction time, high product yield, mild reaction conditions, recyclability, and solvent-free green synthesis, making it convenient, economical, and environmentally beneficial.
Article
Materials Science, Multidisciplinary
Xiaojing Yu, Qiong Wu, Zhongxin Jin, Jianjiao Xin, Haijun Pang, Huiyuan Ma, Xinming Wang, Lichao Tan, Guixin Yang
Summary: A new polyoxometalate-based silver-organic framework has been synthesized and shows efficient catalytic activity in the cyanosilylation reaction, demonstrating significant potential for practical applications.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Haisheng Wei, Huaxing Song, Yujing Ren, Xiaorui Yan, Geqian Fang, Wenhua Wang, Wanzhong Ren, Mingyuan Zhu, Jian Lin
Summary: This study presents a solid-phase synthesis strategy to obtain solvent-free MOF precursors, which are then foamed and pyrolyzed to synthesize the efficient Co@NC-X catalyst. The resulting catalyst exhibits high conversion and selectivity for the hydrogenation of nitroarenes.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xuan-Chi Yu, Yan-Nan Zheng, Jun-Hao Zhang, Jian Zhang, Fa-Liang Liu, Keqi Tang, Ting Li, Wen-Ting Wei
Summary: Three novel radical cyclization reactions of 1,6-enynes with sulfonyl hydrazides have been presented, providing convenient synthetic approaches for accessing different types of lactam derivatives from the same substrate in metal-catalyst-free systems.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
