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Thiel TA, Obata K, Abdi FF, van de Krol R, Schomäcker R, Schwarze M. Photocatalytic hydrogenation of acetophenone on a titanium dioxide cellulose film. RSC Adv 2022; 12:7055-7065. [PMID: 35424704 PMCID: PMC8982184 DOI: 10.1039/d1ra09294d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 02/22/2022] [Indexed: 11/25/2022] Open
Abstract
A previously developed sustainable immobilization concept for photocatalysts based on cellulose as a renewable support material was applied for the photocatalytic hydrogenation of acetophenone (ACP) to 1-phenyl ethanol (PE). Four different TiO2 modifications (P25, P90, PC105, and PC500) were screened for the reaction showing good performance for PC25 and PC500. PC500 was selected for a detailed kinetic study to find the optimal operating conditions, and to obtain a better understanding of the photocatalytic pathway in relation to conventional and transfer hydrogenation. The kinetic data were analyzed using the pseudo-first-order reaction rate law. A complete conversion was obtained for ACP concentrations below 1 mM using a 360 nm filter and argon as the purge gas within 2-3 hours. High oxygen concentrations slow down or prevent the reaction, and wavelengths below 300 nm lead to side-products. By investigating the temperature dependency, an activation energy of 22 kJ mol-1 was determined which is lower than the activation energies for conventional and transfer hydrogenation, because the light activation of the photocatalyst turns the endothermic to an exothermic reaction. PC500 was immobilized onto the cellulose film showing a 37% lower activity that remains almost constant after multiple use.
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Affiliation(s)
- Tabea A Thiel
- Technische Universität Berlin, Department of Chemistry: Multiphase Reaction Engineering Straße des 17. Juni 124, Sekr. TC8 10623 Berlin Germany
| | - Keisuke Obata
- Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Fatwa F Abdi
- Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Roel van de Krol
- Technische Universität Berlin, Department of Chemistry: Multiphase Reaction Engineering Straße des 17. Juni 124, Sekr. TC8 10623 Berlin Germany
- Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner-Platz 1 14109 Berlin Germany
| | - Reinhard Schomäcker
- Technische Universität Berlin, Department of Chemistry: Multiphase Reaction Engineering Straße des 17. Juni 124, Sekr. TC8 10623 Berlin Germany
| | - Michael Schwarze
- Technische Universität Berlin, Department of Chemistry: Multiphase Reaction Engineering Straße des 17. Juni 124, Sekr. TC8 10623 Berlin Germany
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2
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Eskandari P, Zand Z, Kazemi F, Ramdar M. Enhanced catalytic activity of one-dimensional CdS @TiO2 core-shell nanocomposites for selective organic transformations under visible LED irradiation. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113404] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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3
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Liu X, Zhou Y, Zeng D, Wang H, Qiao S, Zhang L, Wang W. Catalytic Acetalization and Hydrogenation of Furfural over the Light‐Tunable Phosphated TiO
2
Catalyst. ChemistrySelect 2021. [DOI: 10.1002/slct.202102104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xuechen Liu
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
| | - Yuanyi Zhou
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences 19A Yuquan Road Beijing 100049 People's Republic of China
| | - Di Zeng
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences 19A Yuquan Road Beijing 100049 People's Republic of China
| | - Haipeng Wang
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences 19A Yuquan Road Beijing 100049 People's Republic of China
| | - Simeng Qiao
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
| | - Ling Zhang
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences 19A Yuquan Road Beijing 100049 People's Republic of China
| | - Wenzhong Wang
- State Key Laboratory of High Performance Ceramics andSuperfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 People's Republic of China
- Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences 19A Yuquan Road Beijing 100049 People's Republic of China
- School of Chemistry and Materials Science Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences 1 Sub-lane Xiangshan Hangzhou 310024 China
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4
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Nan XL, Wang Y, Li XB, Tung CH, Wu LZ. Site-selective D 2O-mediated deuteration of diaryl alcohols via quantum dots photocatalysis. Chem Commun (Camb) 2021; 57:6768-6771. [PMID: 34132717 DOI: 10.1039/d1cc02551a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Owing to the high synthetic value of deuteration in the pharmaceutical industry, we describe herein the conversion of a range of aromatic ketones to deuterium-labeled products in good to excellent yields. Efficient and site-selective deuteration of benzyl alcohols by D2O with visible light irradiation of quantum dots (QDs), together with gram-scale synthesis and photocatalyst recycling experiments indicated the potential of the developed method in practical organic synthesis.
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Affiliation(s)
- Xiao-Lei Nan
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China. and School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Yao Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China. and School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xu-Bing Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China. and School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China. and School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100190, People's Republic of China. and School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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5
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Zhu TZ, Shao PL, Zhang X. Asymmetric hydrogenation of trifluoromethyl ketones: application in the synthesis of Odanacatib and LX-1031. Org Chem Front 2021. [DOI: 10.1039/d1qo00368b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The asymmetric hydrogenation of trifluoromethyl ketones via iridium catalysis to access chiral secondary 2,2,2-trifluoroethanols is presented. The key intermediates of Odanacatib and LX1301 were prepared with high yields and enantioselectivities.
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Affiliation(s)
- Tiao-Zhen Zhu
- College of Innovation and Entrepreneurship
- Southern University of Science and Technology
- Shenzhen 518055
- China
| | - Pan-Lin Shao
- College of Innovation and Entrepreneurship
- Southern University of Science and Technology
- Shenzhen 518055
- China
| | - Xumu Zhang
- Guangdong Provincial Key Laboratory of Catalysis
- Department of Chemistry
- Southern University of Science and Technology
- Shenzhen
- China
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6
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Stroyuk OL, Kuchmy SY. Heterogeneous Photocatalytic Selective Reductive Transformations of Organic Compounds: a Review. THEOR EXP CHEM+ 2020. [DOI: 10.1007/s11237-020-09648-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Yu P, Zhou X, Li Z, Yan Y. Inactivation and change of tetracycline-resistant Escherichia coli in secondary effluent by visible light-driven photocatalytic process using Ag/AgBr/g-C 3N 4. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 705:135639. [PMID: 31841919 DOI: 10.1016/j.scitotenv.2019.135639] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 11/05/2019] [Accepted: 11/18/2019] [Indexed: 05/27/2023]
Abstract
Control of antibiotic-resistant bacteria (ARB) and their related genes in secondary effluents has become a serious issue because of increased awareness of their health risks. A considerable number of techniques have been developed in recent years, particularly in relation to advanced oxidation. However, limited information is known about cellular behavior and resistance characteristic change during photocatalytic treatment. In this study, the inactivation of tetracycline (TC)-resistant Escherichia coli (TC-E. coli), removal of TC-resistant genes (TC-RGs), and antibiotic susceptibility were evaluated by employing photocatalytic treatment using Ag/AgBr/g-C3N4 with visible light irradiation. The effects of light intensity, photocatalyst dosage, and reaction ambient temperature on photocatalysis were modelled and investigated. The rate of TC-E. coli removal was also optimized. Results demonstrated that the optimal conditions for TC-E. coli removal included light intensity of 96.0 mW/cm2, photocatalyst dosage of 211.0 mg/L, and reaction ambient temperature of 23.7 °C. Under such conditions, the ARB removal rate was 6.1 log after 90 min and the related TC-RG removal rates were 49%, 86%, 69%, and 86% for tetA, tetM, tetQ, and intl1, respectively. The minimum inhibitory concentration test after photocatalysis shows that the antibiotic resistance of TC-E. coli was enhanced, which may be mainly due to the changes in the membrane potential and resulted in difficulty in destroying the bacteria through antibiotic contact. Hence, photocatalytic treatment could be an ideal method for ARB and antibiotic-resistant gene (ARG) control in wastewater, but the health risks of the remaining ARB and ARG should be investigated further.
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Affiliation(s)
- Peng Yu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Xiaoqin Zhou
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, PR China.
| | - Zifu Li
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, PR China.
| | - Yichang Yan
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, PR China
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8
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Miyabe H, Kohtani S. Photocatalytic single electron transfer reactions on TiO2 semiconductor. Sci China Chem 2019. [DOI: 10.1007/s11426-019-9626-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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9
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Kohtani S, Kawashima A, Miyabe H. Stereoselective Organic Reactions in Heterogeneous Semiconductor Photocatalysis. Front Chem 2019; 7:630. [PMID: 31620425 PMCID: PMC6759509 DOI: 10.3389/fchem.2019.00630] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 09/02/2019] [Indexed: 01/09/2023] Open
Abstract
The most significant feature of heterogeneous semiconductor photocatalysis is that both oxidation and reduction occur in a one-pot process. Thus, photocatalysis leads to unique redox organic reactions that cannot be achieved by conventional techniques using oxidants or reductants. Semiconductor photocatalysis is expected to be a new method for fine chemical syntheses of highly valuable molecules such as chiral medicines. However, the use of semiconductor photocatalysts in stereoselective reactions has been limited so far. This mini-review highlights recent progress in stereoselective organic reactions using semiconductor photocatalysts, briefly summarizing the enantio- and diastereoselective reactions based on the currently available literature.
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Affiliation(s)
- Shigeru Kohtani
- School of Pharmacy, Hyogo University of Health Sciences, Kobe, Japan
| | - Akira Kawashima
- School of Pharmacy, Hyogo University of Health Sciences, Kobe, Japan
| | - Hideto Miyabe
- School of Pharmacy, Hyogo University of Health Sciences, Kobe, Japan
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10
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Ma D, Zhai S, Wang Y, Liu A, Chen C. TiO₂ Photocatalysis for Transfer Hydrogenation. Molecules 2019; 24:E330. [PMID: 30658472 PMCID: PMC6358817 DOI: 10.3390/molecules24020330] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 01/11/2019] [Accepted: 01/15/2019] [Indexed: 12/02/2022] Open
Abstract
Catalytic transfer hydrogenation reactions, based on hydrogen sources other than gaseous H₂, are important processes that are preferential in both laboratories and factories. However, harsh conditions, such as high temperature, are usually required for most transition-metal catalytic and organocatalytic systems. Moreover, non-volatile hydrogen donors such as dihydropyridinedicarboxylate and formic acid are often required in these processes which increase the difficulty in separating products and lowered the whole atom economy. Recently, TiO₂ photocatalysis provides mild and facile access for transfer hydrogenation of C=C, C=O, N=O and C-X bonds by using volatile alcohols and amines as hydrogen sources. Upon light excitation, TiO₂ photo-induced holes have the ability to oxidatively take two hydrogen atoms off alcohols and amines under room temperature. Simultaneously, photo-induced conduction band electrons would combine with these two hydrogen atoms and smoothly hydrogenate multiple bonds and/or C-X bonds. It is heartening that practices and principles in the transfer hydrogenations of substrates containing C=C, C=O, N=O and C-X bond based on TiO₂ photocatalysis have overcome a lot of the traditional thermocatalysis' limitations and flaws which usually originate from high temperature operations. In this review, we will introduce the recent paragon examples of TiO₂ photocatalytic transfer hydrogenations used in (1) C=C and C≡C (2) C=O and C=N (3) N=O substrates and in-depth discuss basic principle, status, challenges and future directions of transfer hydrogenation mediated by TiO₂ photocatalysis.
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Affiliation(s)
- Dongge Ma
- School of Science, Beijing Technology and Business University, Beijing 100048, China.
| | - Shan Zhai
- School of Science, Beijing Technology and Business University, Beijing 100048, China.
| | - Yi Wang
- School of Science, Beijing Technology and Business University, Beijing 100048, China.
| | - Anan Liu
- Basic Experimental Center for Natural Science, University of Science and Technology Beijing, Beijing 100083, China.
| | - Chuncheng Chen
- Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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11
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Zhang B, Zhang X, Hao J, Yang C. Palladium-Catalyzed Direct Approach to α-Trifluoromethyl Alcohols by Selective Hydroxylfluorination of gem
-Difluoroalkenes. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800468] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Bin Zhang
- State Key Laboratory of Drug Research; Shanghai Institute of Materia Medica; Chinese Academy of Sciences; 201203 Shanghai China
- Department of Chemistry; Innovative Drug Research Center; Shanghai University; 200436 Shanghai China
| | - Xiaofei Zhang
- State Key Laboratory of Drug Research; Shanghai Institute of Materia Medica; Chinese Academy of Sciences; 201203 Shanghai China
| | - Jian Hao
- Department of Chemistry; Innovative Drug Research Center; Shanghai University; 200436 Shanghai China
| | - Chunhao Yang
- State Key Laboratory of Drug Research; Shanghai Institute of Materia Medica; Chinese Academy of Sciences; 201203 Shanghai China
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12
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Zhang C, Li Y, Zhang W, Wang P, Wang C. Metal-free virucidal effects induced by g-C 3N 4 under visible light irradiation: Statistical analysis and parameter optimization. CHEMOSPHERE 2018; 195:551-558. [PMID: 29277035 DOI: 10.1016/j.chemosphere.2017.12.122] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 12/12/2017] [Accepted: 12/19/2017] [Indexed: 05/24/2023]
Abstract
Waterborne viruses with a low infectious dose and a high pathogenic potential pose a serious risk for humans all over the world, calling for a cost-effective and environmentally-friendly inactivation method. Optimizing operational parameters during the disinfection process is a facile and efficient way to achieve the satisfactory viral inactivation efficiency. Here, the antiviral effects of a metal-free visible-light-driven graphitic carbon nitride (g-C3N4) photocatalyst were optimized by varying operating parameters with response surface methodology (RSM). Twenty sets of viral inactivation experiments were performed by changing three operating parameters, namely light intensity, photocatalyst loading and reaction temperature, at five levels. According to the experimental data, a semi-empirical model was developed with a high accuracy (determination coefficient R2 = 0.9908) and then applied to predict the final inactivation efficiency of MS2 (a model virus) after 180 min exposure to the photocatalyst and visible light illumination. The corresponding optimal values were found to be 199.80 mW/cm2, 135.40 mg/L and 24.05 °C for light intensity, photocatalyst loading and reaction temperature, respectively. Under the optimized conditions, 8 log PFU/mL of viruses could be completely inactivated by g-C3N4 without regrowth within 240 min visible light irradiation. Our study provides not only an extended application of RSM in photocatalytic viral inactivation but also a green and effective method for water disinfection.
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Affiliation(s)
- Chi Zhang
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Xikang Road #1, Nanjing 210098, PR China
| | - Yi Li
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Xikang Road #1, Nanjing 210098, PR China.
| | - Wenlong Zhang
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Xikang Road #1, Nanjing 210098, PR China
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Xikang Road #1, Nanjing 210098, PR China
| | - Chao Wang
- Key Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Xikang Road #1, Nanjing 210098, PR China
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13
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Kohtani S, Kawashima A, Masuda F, Sumi M, Kitagawa Y, Yoshioka E, Hasegawa Y, Miyabe H. Chiral α-hydroxy acid-coadsorbed TiO2 photocatalysts for asymmetric induction in hydrogenation of aromatic ketones. Chem Commun (Camb) 2018; 54:12610-12613. [DOI: 10.1039/c8cc07295g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In enantioselective photohydrogenation of aromatic ketones on TiO2, the enantioselectivity is strongly affected by not only chiral reagents but also the crystalline phase, surface structure, and morphology of TiO2.
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Affiliation(s)
- Shigeru Kohtani
- Department of Pharmacy
- School of Pharmacy
- Hyogo University of Health Sciences
- Kobe
- Japan
| | - Akira Kawashima
- Department of Pharmacy
- School of Pharmacy
- Hyogo University of Health Sciences
- Kobe
- Japan
| | - Fumie Masuda
- Department of Pharmacy
- School of Pharmacy
- Hyogo University of Health Sciences
- Kobe
- Japan
| | - Momono Sumi
- Department of Pharmacy
- School of Pharmacy
- Hyogo University of Health Sciences
- Kobe
- Japan
| | - Yuichi Kitagawa
- Division of Applied Chemistry
- Faculty of Engineering
- Hokkaido University
- Sapporo 060-8628
- Japan
| | - Eito Yoshioka
- Department of Pharmacy
- School of Pharmacy
- Hyogo University of Health Sciences
- Kobe
- Japan
| | - Yasuchika Hasegawa
- Division of Applied Chemistry
- Faculty of Engineering
- Hokkaido University
- Sapporo 060-8628
- Japan
| | - Hideto Miyabe
- Department of Pharmacy
- School of Pharmacy
- Hyogo University of Health Sciences
- Kobe
- Japan
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15
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Suzuki K, Yamaguchi K, Mizuno N. Photoredox Catalysis of Visible-light-responsive Divacant Lacunary Silicotungstate for Selective Reduction of Aldehydes. CHEM LETT 2017. [DOI: 10.1246/cl.170577] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kosuke Suzuki
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Kazuya Yamaguchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Noritaka Mizuno
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656
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16
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Fukui M, Kouda H, Tanaka A, Hashimoto K, Kominami H. Heterogeneous Meerwein-Ponndorf-Verley-type Reduction of Aromatic Aldehydes Having Other Reducible Functional Groups over a TiO2Photocatalyst. ChemistrySelect 2017. [DOI: 10.1002/slct.201602018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Makoto Fukui
- Graduate School of Science and Engineering; Kindai University, Kowakae; Higashiosaka Osaka 577-8502 Japan
| | - Hideki Kouda
- Graduate School of Science and Engineering; Kindai University, Kowakae; Higashiosaka Osaka 577-8502 Japan
| | - Atsuhiro Tanaka
- Department of Applied Chemistry, Faculty of Science and Engeering; Kindai University, Kowakae; Higashiosaka Osaka 577-8502 Japan
| | - Keiji Hashimoto
- Department of Applied Chemistry, Faculty of Science and Engeering; Kindai University, Kowakae; Higashiosaka Osaka 577-8502 Japan
| | - Hiroshi Kominami
- Department of Applied Chemistry, Faculty of Science and Engeering; Kindai University, Kowakae; Higashiosaka Osaka 577-8502 Japan
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17
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Molinari A, Maldotti A, Amadelli R. Effect of the electrolyte cations on photoinduced charge transfer at TiO 2. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.09.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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18
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Fukui M, Tanaka A, Hashimoto K, Kominami H. Meerwein–Ponndorf–Verley-type Reduction over a Metal-free TiO2Photocatalyst in Alcohol: Chemoselective Hydrogenation of Chlorobenzaldehyde to Chlorobenzyl Alcohol. CHEM LETT 2016. [DOI: 10.1246/cl.160476] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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19
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Manley DW, Walton JC. Preparative semiconductor photoredox catalysis: An emerging theme in organic synthesis. Beilstein J Org Chem 2015; 11:1570-82. [PMID: 26664577 PMCID: PMC4660884 DOI: 10.3762/bjoc.11.173] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 08/19/2015] [Indexed: 11/23/2022] Open
Abstract
Heterogeneous semiconductor photoredox catalysis (SCPC), particularly with TiO2, is evolving to provide radically new synthetic applications. In this review we describe how photoactivated SCPCs can either (i) interact with a precursor that donates an electron to the semiconductor thus generating a radical cation; or (ii) interact with an acceptor precursor that picks up an electron with production of a radical anion. The radical cations of appropriate donors convert to neutral radicals usually by loss of a proton. The most efficient donors for synthetic purposes contain adjacent functional groups such that the neutral radicals are resonance stabilized. Thus, ET from allylic alkenes and enol ethers generated allyl type radicals that reacted with 1,2-diazine or imine co-reactants to yield functionalized hydrazones or benzylanilines. SCPC with tertiary amines enabled electron-deficient alkenes to be alkylated and furoquinolinones to be accessed. Primary amines on their own led to self-reactions involving C-N coupling and, with terminal diamines, cyclic amines were produced. Carboxylic acids were particularly fruitful affording C-centered radicals that alkylated alkenes and took part in tandem addition cyclizations producing chromenopyrroles; decarboxylative homo-dimerizations were also observed. Acceptors initially yielding radical anions included nitroaromatics and aromatic iodides. The latter led to hydrodehalogenations and cyclizations with suitable precursors. Reductive SCPC also enabled electron-deficient alkenes and aromatic aldehydes to be hydrogenated without the need for hydrogen gas.
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Affiliation(s)
- David W Manley
- University of St. Andrews, EaStCHEM School of Chemistry, St. Andrews, Fife, KY16 9ST, UK
| | - John C Walton
- University of St. Andrews, EaStCHEM School of Chemistry, St. Andrews, Fife, KY16 9ST, UK
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20
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Photohydrogenation of Acetophenone Using Coumarin Dye-Sensitized Titanium Dioxide under Visible Light Irradiation. Catalysts 2015. [DOI: 10.3390/catal5031417] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Abstract
Titanium dioxide is a versatile heterogeneous catalyst. Absorption of light by a TiO2 particle leads to the formation of an electron–hole pair. Electron transfer from or to the particle induces redox reactions. Although mainly applied in the context of environmental chemistry, these processes are also used to selectively transform organic compounds. Oxidations and reductions have been carried out. Applications to the synthesis of heterocycles have been reported. Many C–C bond formation reactions have been performed. Owing to adsorption of the substrates or by different surface modifications, visible light can be used to excite the catalytic system, which generates mild reaction conditions.
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Molinari A, Maldotti A, Amadelli R. Probing the role of surface energetics of electrons and their accumulation in photoreduction processes on TiO₂. Chemistry 2014; 20:7759-65. [PMID: 24829086 DOI: 10.1002/chem.201402039] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 03/14/2014] [Indexed: 11/06/2022]
Abstract
We address the role of the energetics of photogenerated electrons in the reduction of 4-nitrobenzaldehyde on TiO2. This model molecule bears two functional groups featuring different reducibilities. Electrochemistry shows that reduction to 4-aminobenzyl alcohol occurs in entirely distinct potential ranges. Partial reduction of the -NO2 group, affording 4-aminobenzaldehyde, takes place through surface states at potentials positive of the flatband potential (E(fb)). Dark currents caused by reduction of the aldehyde group are observed only at potentials more negative than E(fb), and the process requires an electron accumulation regime. Photocatalysis with TiO2 suspensions agrees with the electrochemical data. In particular, reduction of the nitro group is a relatively fast process (k=0.059 s(-1)), whereas that of the aldehyde group is slower (k=0.001 s(-1)) and requires electron photoaccumulation. Control of the photogenerated charge is a prospective means for achieving chemoselective reductions.
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Affiliation(s)
- Alessandra Molinari
- Dipartimento di Scienze Chimiche e Farmaceutiche, Via Fossato di Mortara 17, 44121 Ferrara (Italy), Fax: (+39) 0532240709.
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