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Zhu T, Xu Y, Li Z, He J, Yuan X, Qian D, Chang T, Lu L, Chi B, Guo K. Cholinium Pyridinolate Ionic Pair-Catalyzed Fixation of CO 2 into Cyclic Carbonates. J Org Chem 2024. [PMID: 38787343 DOI: 10.1021/acs.joc.3c02609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
A halide-free ionic pair organocatalyst was proposed for the cycloaddition of CO2 into epoxide reactions. Cholinium pyridinolate ionic pairs with three different substitution positions were designed. Under conditions of temperature of 120 °C, pressure of 1 MPa CO2, and catalyst loading of 5 mol %, the optimal catalyst cholinium 4-pyridinolate ([Ch]+[4-OP]-) was employed. After a reaction time of 12 h, styrene oxide was successfully converted into the corresponding cyclic carbonate, and its selectivity was improved to 90%. A series of terminal epoxides were converted into cyclic carbonates within 12 h, with yields ranging from 80 to 99%. The proposed mechanism was verified by 1H NMR and 13C NMR titrations. Cholinium cations act as a hydrogen bond donor to activate epoxides, and pyridinolate anions combine with carbon dioxide to form intermediate carbonate anions that attack epoxides as nucleophiles and lead to ring opening. In summary, a halide-free ionic pair organocatalyst was designed and the catalytic mechanism in the cycloaddition of CO2 into epoxides reactions was proposed.
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Affiliation(s)
- Tianyu Zhu
- State Key Laboratory Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhu Road South, Nanjing 211816, China
| | - Yue Xu
- State Key Laboratory Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhu Road South, Nanjing 211816, China
| | - Zhenjiang Li
- State Key Laboratory Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhu Road South, Nanjing 211816, China
| | - Jun He
- State Key Laboratory Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhu Road South, Nanjing 211816, China
| | - Xin Yuan
- State Key Laboratory Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhu Road South, Nanjing 211816, China
| | - Dong Qian
- State Key Laboratory Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhu Road South, Nanjing 211816, China
| | - Tong Chang
- State Key Laboratory Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhu Road South, Nanjing 211816, China
| | - Longlin Lu
- State Key Laboratory Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhu Road South, Nanjing 211816, China
| | - Bo Chi
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Kai Guo
- State Key Laboratory Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhu Road South, Nanjing 211816, China
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Chen T, Sun Z, Guo Y, Xu Y. Does the active hydrogen atom in the hydantoin anion affect the physical properties, CO 2 capture and conversion of ionic liquids? Phys Chem Chem Phys 2024; 26:12957-12964. [PMID: 38632968 DOI: 10.1039/d3cp05965k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Compared to the effect of the active hydrogen atom in the cation in protic ionic liquids (ILs) on their properties and applications, there are very few reports on the role of the active hydrogen atom in the anion. In order to better understand the role of the active hydrogen atom in the anion, the physical properties, CO2 capture and conversion of three hydantoin-based anion-functionalized ILs ([P4442][Hy], [P4442]2[Hy], and [HDBU][Hy]) have been investigated via experiments, spectroscopy, and DFT calculations in this work. The results show that the active hydrogen atom in the anion can form anionic hydrogen bonding networks, which significantly increase the melting point and viscosity and decrease the basicity of the IL, thereby weakening its ability to capture and convert CO2. Interestingly, [P4442][Hy] undergoes a solid/liquid two-phase transition during CO2 absorption/desorption due to the formation of quasi-intramolecular hydrogen bonding between the active hydrogen atom and the O- atom of the absorbed CO2, suggesting that the presence of the active hydrogen atom gives [P4442][Hy] the potential to be an excellent molecular switch. As there is no active hydrogen atom in the anion of [P4442]2[Hy], it shows excellent CO2 capture and conversion performance through the double-site interaction. [HDBU][Hy] shows the weakest catalytic CO2 conversion due to the presence of active hydrogen atoms on both its anion and cation. Therefore, the active hydrogen atom in the anion may play a more important role in the properties and potential applications of ILs than the active hydrogen atom in the cation.
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Affiliation(s)
- Tingting Chen
- Department of Chemistry, Shaoxing University, 508 Huancheng West Road, Shaoxing, Zhejiang Province, 312000, China.
| | - Zhongyuan Sun
- Department of Chemistry, Shaoxing University, 508 Huancheng West Road, Shaoxing, Zhejiang Province, 312000, China.
| | - Yujun Guo
- Department of Chemistry, Shaoxing University, 508 Huancheng West Road, Shaoxing, Zhejiang Province, 312000, China.
| | - Yingjie Xu
- Department of Chemistry, Shaoxing University, 508 Huancheng West Road, Shaoxing, Zhejiang Province, 312000, China.
- Zhejiang Engineering Research Center of Fat-soluble Vitamin, 508 Huancheng West Road, Shaoxing, Zhejiang Province, 312000, China
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Weng S, Dong J, Ma J, Bai J, Liu F, Liu M. Biocompatible anions-derived ionic liquids a sustainable media for CO2 conversion into quinazoline-2,4(1H,3H)-diones under additive-free conditions. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2021.101841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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McNeice P, Marr PC, Marr AC. Basic ionic liquids for catalysis: the road to greater stability. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02274h] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Homogeneous and heterogenized basic ionic liquids as reaction catalysts have been highlighted, particularly where they are used to promote reactions that could form the basis of more sustainable energy and chemical production.
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Affiliation(s)
- Peter McNeice
- Queen's University Ionic Liquids Laboratories and
- The School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast
- UK
| | - Patricia C. Marr
- Queen's University Ionic Liquids Laboratories and
- The School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast
- UK
| | - Andrew C. Marr
- Queen's University Ionic Liquids Laboratories and
- The School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast
- UK
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Wazeer I, Hadj-Kali MK, Al-Nashef IM. Utilization of Deep Eutectic Solvents to Reduce the Release of Hazardous Gases to the Atmosphere: A Critical Review. Molecules 2020; 26:E75. [PMID: 33375265 PMCID: PMC7795314 DOI: 10.3390/molecules26010075] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 12/20/2020] [Accepted: 12/23/2020] [Indexed: 11/16/2022] Open
Abstract
The release of certain gases to the atmosphere is controlled in many countries owing to their negative impact on the environment and human health. These gases include carbon dioxide (CO2), sulfur oxides (SOx), nitrogen oxides (NOx), hydrogen sulfide (H2S) and ammonia (NH3). Considering the major contribution of greenhouse gases to global warming and climate change, mitigation of these gases is one of the world's primary challenges. Nevertheless, the commercial processes used to capture these gases suffer from several drawbacks, including the use of volatile solvents, generation of hazardous byproducts, and high-energy demand. Research in green chemistry has resulted in the synthesis of potentially green solvents that are non-toxic, efficient, and environmentally friendly. Deep eutectic solvents (DESs) are novel solvents that upon wise choice of their constituents can be green and tunable with high biocompatibility, high degradability, and low cost. Consequently, the capture of toxic gases by DESs is promising and environmentally friendly and has attracted much attention during the last decade. Here, we review recent results on capture of these gases using different types of DESs. The effect of different parameters, such as chemical structure, molar ratio, temperature, and pressure, on capture efficiency is discussed.
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Affiliation(s)
- Irfan Wazeer
- Chemical Engineering Department, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia;
| | - Mohamed K. Hadj-Kali
- Chemical Engineering Department, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia;
| | - Inas M. Al-Nashef
- Department of Chemical Engineering, Masdar Institute, Khalifa University of Science and Technology, P.O. Box 54224, Abu Dhabi, UAE;
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Du C, Chen Y. Zinc Powder Catalysed Formylation and Urealation of Amines Using
CO
2
as a
C1
Building Block
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000072] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Chongyang Du
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Yaofeng Chen
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
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