Article
Chemistry, Applied
Dan Wang, Ziyuan Gao, Sujiao Duan, Jiaojiao Wei, Linjing Ma, Ning Wang, Jun Li
Summary: Two porphyrins and their metalloporphyrins were successfully synthesized and characterized. Both halogen ions and metal centers were found to be indispensable active sites for the cycloaddition reaction between carbon dioxide and epoxides. Zn-TEtImP exhibited high catalytic activity and excellent recyclability in this reaction.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Qianmeng Zhao, Jian Chen, Mengqian Fu, Lili Deng, Yunong Li, Qian Su, Weiguo Cheng
Summary: This study developed a new strategy to enhance the catalytic activity of PILs by regulating their structure. A gradient structure with enriched ionic liquids on the surface was formed by shortening the alkyl chain length of the IL monomer, allowing for better utilization of the active sites. The PIL with a 4-carbon alkyl chain exhibited the best catalytic activity, and further analysis revealed that the release of Br- enhanced the catalytic activity.
APPLIED MATERIALS TODAY
(2023)
Article
Chemistry, Multidisciplinary
alvaro Farias Arruda da Mata, Nicolas Glanzmann, Pedro Henrique Fazza Stroppa, Felipe Terra Martins, Rafael Pavao das Chagas, Adilson David da Silva, Jorge Luiz Sonego Milani
Summary: In this study, a series of HO-functionalized 1,2,3-triazolic ionic liquids were evaluated as catalysts for cycloaddition reactions involving CO2 and epoxides. The results showed that the synergism between the hydroxyl group and the counter anion is essential for achieving excellent catalytic performance. The optimal reaction conditions led to high conversion rates, even in a scale-up experiment.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Engineering, Chemical
Pan Ma, Meili Ding, Ying Zhang, Wei Rong, Jianfeng Yao
Summary: This study designed a lanthanide (III) complex and immobilized it with DUT-5 through a combination of coordination and in situ polymerization, resulting in La-Vim/DUT-5 catalyst with high porosity and multiple active sites. The catalytic yield of this catalyst in the cycloaddition of epichlorohydrin with CO2 reached 94%, much higher than each individual component. Moreover, the catalytic activities of this catalyst can be well maintained using simulated flue gas as C1 source under both dry and humid conditions. This work opens up a novel and general avenue to tailor the chemical functionality of MOFs for capturing and converting CO2 under actual conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Applied
Kuikui Zhang, Zhenbang Liu, Ning Liu
Summary: A three-component catalytic system was developed, involving benzimidazolium salts, CrCl2, and TBAB, with each component playing a distinct role in the catalytic process as clarified by control experiments and spectroscopic measurements. The terminal epoxides showed high reactivity in the catalytic system under mild conditions, while increasing the temperature, CO2 pressure, and/or prolonging the reaction time also enhanced catalytic activity for internal epoxides.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Qianmeng Zhao, Xiaoqian Yao, Qian Su, Lili Deng, Jian Chen, Yunong Li, Li Dong, Zifeng Yang, Weiguo Cheng
Summary: This study designed and synthesized poly(ionic liquid)s catalysts with high ionic density for the synthesis of cyclic carbonate from CO2 and epoxide. The catalyst exhibited excellent catalytic performance, comparable to homogeneous catalysts, with convenient product separability. This research provides a novel strategy for developing highly efficient catalysts for CO2 conversion to high value products.
Article
Chemistry, Physical
Qin Wen, Xuexin Yuan, Qiqi Zhou, Hai-Jian Yang, Qingqing Jiang, Juncheng Hu, Cun-Yue Guo
Summary: In this paper, a series of bifunctional metallic niobium complexes were synthesized for the coupling reaction of CO2 and epoxides. The catalysts showed high efficiency, selectivity, and substrate suitability, and could be easily recovered and reused. Kinetic studies and a possible reaction mechanism were also proposed to further understand the reaction.
Article
Chemistry, Multidisciplinary
Junwu Chen, Xianmin Wu, Huining Ding, Ning Liu, Binyuan Liu, Lirong He
Summary: A new type of sustainable bimetallic zinc complexes has been developed for the chemical fixation of carbon dioxide into cyclic carbonates. The catalyst showed excellent performance with high stability to moisture and oxygen, resistance to impurities, and good recyclability. The catalytic mechanism involves a Lewis acidic zinc center and a nucleophilic halide counterion from the cocatalyst.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Engineering, Environmental
Longqiang Xiao, Yiming Lai, Qianyu Song, Jingyu Cai, Yulai Zhao, Linxi Hou
Summary: A series of polymers were synthesized by copolymerization of vinyl functionalized polyhedral oligomeric silsesquioxanes (POSS) with vinylimidazole based linker, by adjusting the molar ratio of the two monomers. These POSS-based polymers were found to be efficient catalysts for the cycloaddition reaction of CO2 with various epoxides, producing cyclic carbonates with a high conversion of up to 97.1% under atmospheric pressure without solvent and co-catalyst. Moreover, the synthesized polymers significantly reduced the activation energy of the cycloaddition reaction of CO2 and could be recycled up to 5 times without a decrease in catalytic performance.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Organic
Feng-tian Wu, Ling Wu, Chun-na Cui
Summary: The catalytic system 'Rhodamine B/additive' was introduced to facilitate CO2 reactions, leading to the synthesis of various cyclic carbonates and 2-oxazolidinone derivatives in good to excellent yields.
Article
Chemistry, Multidisciplinary
Fatemeh Niknam, Vito Capaccio, Magdalena Kleybolte, David H. Lamparelli, Malte Winnacker, Giulia Fiorani, Carmine Capacchione
Summary: In this study, four new mononuclear Cr(III) complexes bearing [OSSO]-type bis-thioether-diphenolate ligands were synthesized and characterized. These complexes, in combination with PPNCl, were found to promote the coupling of CO2 with epoxides, leading to the selective formation of either polycarbonate or cyclic carbonate depending on the substrate and reaction conditions.
Article
Chemistry, Multidisciplinary
Anas Alhafez, Emine Aytar, Ahmet Kilic
Summary: In this study, novel neutral cobaloximes and cobaloxime-based double complex salts were synthesized and evaluated as efficient catalysts for the synthesis of cyclic carbonates. The catalytic performance of different forms of these compounds was investigated, and the factors affecting the catalysis were studied. Characterization techniques were used to analyze the compounds, and their catalytic activity was tested in the carboxylation reaction. The best conversion was achieved using a specific catalyst and co-catalyst, resulting in high yield and selectivity.
JOURNAL OF CO2 UTILIZATION
(2022)
Review
Polymer Science
Suleiman Gani Musa, Zulkifli Merican Aljunid Merican, Omid Akbarzadeh
Summary: With the escalating issue of global warming, efforts are being made towards achieving a carbon-neutral environment by utilizing non-fossil fuel sources such as solar, nuclear, and biomass energy. Metal-organic frameworks are being explored as potential catalysts for converting CO2 into organic carbonates, given their unique features and ease of synthesis.
Article
Chemistry, Inorganic & Nuclear
Fei Chen, Sheng Tao, Ning Liu, Bin Dai
Summary: By synthesizing new N-heterocyclic carbene-nitrogen molybdenum complexes, an efficient catalytic system has been developed for the conversion of epoxides and terminal alkynes at lower temperature and pressure. The cooperative catalysis mechanism between molybdenum complex and tetrabutyl ammonium iodide allows for the effective utilization of CO2.
Article
Chemistry, Physical
Masatoshi Mihara, Shuichi Nakao, Takeo Nakai, Takumi Mizuno
Summary: The development of an effective catalytic system for the cycloaddition of carbon dioxide to epoxides is crucial. In this study, a mixture of zinc iodide, metal chlorides, and strong organic bases was found to be a useful catalytic system that works at room temperature and atmospheric pressure. The most efficient combination produced styrene carbonate (95%) and propylene carbonate, showing that this method is a powerful tool for utilizing CO2 in the production of valuable chemicals.
