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Pathania V, Roy SR. Phenalenyl-Based Photocatalyst for Bioinspired Oxidative Dehydrogenation of N-Heterocycles and Benzyl Alcohols. J Org Chem 2024; 89:4145-4155. [PMID: 38415655 DOI: 10.1021/acs.joc.4c00081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
The environmental benefits of molecular oxygen as the oxidizing agent in oxidation reactions that synthesize fine chemicals cannot be overstated. Increased interest in developing robust photocatalysts is stimulated by the fact that the current photocatalytic transformation boom has made previously inaccessible synthetic approaches possible. Motivated by enzymatic catalysis, employing a reusable phenalenyl-based photocatalyst, we have successfully developed oxidative dehydrogenation utilizing molecular oxygen as a greener oxidant. Under photoinduced oxidative dehydrogenation conditions, different types of saturated N-heterocycles and alcohols were successfully dehydrogenated. The versatility of this bioinspired protocol is demonstrated by the fact that a wide variety of N-heteroaromatics, such as quinoline, carbazole, quinoxaline, acridine, and indole derivatives, as well as aldehydes and ketones, were successfully synthesized. Detailed mechanistic studies validate the proposed mechanism. Fluorescence lifetime and CV experiments revealed the crucial role of water on the efficiency of the reaction. The present protocol also provides chemoselectivity and scalability, leading to superior results and allowing for the functionalization of bioactive molecules at a late stage in a sustainable manner.
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Affiliation(s)
- Vishali Pathania
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sudipta Raha Roy
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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2
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Li P, Tian Y, Tian L, Wang Y. Selective electrochemical acceptorless dehydrogenation reactions of tetrahydroisoquinoline derivatives. Org Biomol Chem 2024; 22:725-730. [PMID: 38169000 DOI: 10.1039/d3ob01930f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Selective dehydrogenation reactions of tetrahydroisoquinoline derivatives through electrochemical oxidation are disclosed. In the presence of nitric acid, the selective partial dehydrogenation of tetrahydroisoquinolines to form 3,4-dihydroisoquinolines was achieved via anodic oxidation. The results of CV (Cyclic Voltammograms) experiments and DFT calculations showed the 3,4-dihydroisoquinolines protonated by an external Brønsted acid to be less prone than their unprotonated counterparts to oxidation under electrochemical conditions, thus avoiding their further dehydrogenation. Moreover, a TEMPO-mediated electrochemical oxidation enabled a complete dehydrogenation to yield fully aromatized isoquinolines. Thus, tunable processes involving electrochemical dehydrogenation of tetrahydroisoquinolines could be used to selectively produce various 3,4-dihydroisoquinolines and isoquinoline derivatives.
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Affiliation(s)
- Pan Li
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Yue Tian
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Lifang Tian
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Yahui Wang
- Technical Institute of Fluorochemistry (TIF), State Key Laboratory of Materials-Oriented Chemical Engineering (MCE), School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
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3
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Qian BC, Wang X, Wang Q, Zhu XQ, Shen GB. Thermodynamic evaluations of the acceptorless dehydrogenation and hydrogenation of pre-aromatic and aromatic N-heterocycles in acetonitrile. RSC Adv 2024; 14:222-232. [PMID: 38173608 PMCID: PMC10758765 DOI: 10.1039/d3ra08022f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 12/04/2023] [Indexed: 01/05/2024] Open
Abstract
N-heterocycles are important chemical hydrogen-storage materials, and the acceptorless dehydrogenation and hydrogenation of N-heterocycles as organic hydrogen carriers have been widely studied, with the main focus on the catalyst synthesis and design, investigation of the redox mechanisms, and extension of substrate scope. In this work, the Gibbs free energies of the dehydrogenation of pre-aromatic N-heterocycles (YH2) and the hydrogenation of aromatic N-heterocycles (Y), i.e., ΔGH2R(YH2) and ΔGH2A(Y), were derived by constructing thermodynamic cycles using Hess' law. The thermodynamic abilities for the acceptorless dehydrogenation and hydrogenation of 78 pre-aromatic N-heterocycles (YH2) and related 78 aromatic N-heterocycles (Y) were well evaluated and discussed in acetonitrile. Moreover, the applications of the two thermodynamic parameters in identifying pre-aromatic N-heterocycles possessing reversible dehydrogenation and hydrogenation properties and the selection of the pre-aromatic N-heterocyclic hydrogen reductants in catalytic hydrogenation were considered and are discussed in detail. Undoubtedly, this work focuses on two new thermodynamic parameters of pre-aromatic and aromatic N-heterocycles, namely ΔGH2R(YH2) and ΔGH2A(Y), which are important supplements to our previous work to offer precise insights into the chemical hydrogen storage and hydrogenation reactions of pre-aromatic and aromatic N-heterocycles.
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Affiliation(s)
- Bao-Chen Qian
- College of Medical Engineering, Jining Medical University Jining Shandong 272000 P. R. China
| | - Xiao Wang
- College of Medical Engineering, Jining Medical University Jining Shandong 272000 P. R. China
| | - Qi Wang
- College of Medical Engineering, Jining Medical University Jining Shandong 272000 P. R. China
| | - Xiao-Qing Zhu
- The State Key Laboratory of Elemento-Organic Chemistry, Department of Chemistry, Nankai University Tianjin 300071 China
| | - Guang-Bin Shen
- College of Medical Engineering, Jining Medical University Jining Shandong 272000 P. R. China
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4
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Dahiya P, Garg N, Poli R, Sundararaju B. Hydrogenation and dehydrogenation of N-heterocycles under Cp*Co(III)-catalysis. Dalton Trans 2023; 52:14752-14756. [PMID: 37814805 DOI: 10.1039/d3dt03161f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
To realize the goal of a carbon-free energy economy, it is crucial to discover reactions that utilize sustainable resources as alternatives to fossil feedstocks. In this study, a well-defined, air-stable Cp*Co(III)-catalyst for transfer hydrogenation of quinoline derivatives and oxidative dehydrogenation of cyclic amines in water is developed. While the former reaction is promoted by formic acid as a transfer hydrogenation reagent, the latter is mediated by molecular oxygen as the sole oxidant. These processes provide new avenues for the investigation of air-stable cobalt catalysts for environmentally benign hydrogenation and dehydrogenation reactions.
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Affiliation(s)
- Pardeep Dahiya
- Department of chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India - 208 016.
| | - Nidhi Garg
- Department of chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India - 208 016.
| | - Rinaldo Poli
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, BP 44099, F-31077, Toulouse Cedex 4, France
- Institut Universitaire de France, 1, rue Descartes, 75231 Paris Cedex 05, France
| | - Basker Sundararaju
- Department of chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India - 208 016.
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5
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Zhang R, Chen N, Ning T, Zhang Y, Ling Y, Wang X, Zhu W, Zhu G. Branched Porous Ni 3N as a Catalytic Electrode for Selective Semidehydrogenation of Tetrahydroisoquinoline. Inorg Chem 2023; 62:17433-17443. [PMID: 37817640 DOI: 10.1021/acs.inorgchem.3c02809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/12/2023]
Abstract
Oxygen evolution in electrochemical water splitting needs a high overpotential that significantly reduces the energy efficiency. To explore an alternative anodic reaction to promote the production of hydrogen at the other end of water splitting and at the same time to get high-value-added chemicals is highly desirable. Herein, we demonstrate a novel branched porous Ni3N catalyst that is prepared for dehydrogenation of tetrahydroisoquinoline, which acts as an anodic oxidation reaction to promote H2 formation on the other end. Interestingly, the Ni3N catalytic electrode can induce effective semidehydrogenation with the selective formation of dihydroisoquinoline, which is difficult to be obtained by the usual direct synthesis route. The catalytic electrode exhibits a low potential of 1.55 V (vs RHE) for a catalytic current density of 61 mA cm-2 with dehydrogenation of tetrahydroisoquinoline and hydrogen production. In situ Raman spectra studies suggest that NiOOH is formed on the electrode surface, which mediates the oxidation semidehydrogenation process. This work also provides a strategy to fabricate nitride materials for applications beyond selective semidehydrogenation of tetrahydroisoquinoline.
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Affiliation(s)
- Rongxian Zhang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Nan Chen
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Tianya Ning
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Yizhou Zhang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
| | - Yizhou Ling
- School of Educational Sciences, Nanjing Normal University, Nanjing 210097, China
| | - Xi Wang
- School of Chemistry and Chemical Engineering, Hefei Normal University, Hefei 230601, China
| | - Wenjuan Zhu
- School of Chemistry and Chemical Engineering, Hefei Normal University, Hefei 230601, China
| | - Guoxing Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
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6
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Cheng QY, Wang T, Hu J, Chen HY, Xu JJ. In Situ Probing the Short-Lived Intermediates in Visible-Light Heterogeneous Photocatalysis by Mass Spectrometry. Anal Chem 2023; 95:14150-14157. [PMID: 37665645 DOI: 10.1021/acs.analchem.3c03494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Visible-light-mediated heterogeneous photocatalysis has recently emerged as an environmentally friendly and energy-sustainable alternative for organic transformations. Despite the advancements in developing wide varieties of photocatalysts during the past decades, the accurate probing and identification of the photogenerated species, especially the short-lived radical intermediates, are still challenging. In this work, we reported a hybrid ion emitter that integrated with a pico-liter heterogeneous photocatalytic reactor, which was fabricated by depositing the photocatalyst (e.g., TiO2) into the front tip of a quartz micropipette. Benefited from the dual-function feature of the hybrid micropipette (i.e., a clog-free tip-confined pico-liter reactor for heterogeneous photocatalysis and an ion emitter for nanoelectrospray ionization), sensitized photoredox reactions at the catalyst-solution interface can be triggered upon visible-light irradiation using a cheap LED laser (453 nm), and the newly produced transient radical intermediates can be rapidly transformed into gaseous ions for mass spectrometric identification. Using this novel low-delay coupling device, photogenerated intermediates, including the cationic radicals produced during the photooxidation of anilines and the anionic radicals produced during the photoreduction of quinones, were successfully captured by mass spectrometry. We believe that our hybrid photochemical microreactor/ion emitter has provided a new and powerful tool for exploring the complicated heterogeneous photochemical processes, especially their ultrafast initial transformations.
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Affiliation(s)
- Qiu-Yue Cheng
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Ting Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Jun Hu
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, P. R. China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Jing-Juan Xu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
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7
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Althabaiti SA, Khan Z, Narasimharao K, Bawaked SM, Al-Sheheri SZ, Mokhtar M, Malik MA. Selective Thermal and Photocatalytic Decomposition of Aqueous Hydrazine to Produce H 2 over Ag-Modified TiO 2 Nanomaterial. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2076. [PMID: 37513087 PMCID: PMC10383222 DOI: 10.3390/nano13142076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 07/06/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023]
Abstract
An Ag-modified TiO2 nanomaterial was prepared by a one-pot synthesis method using tetra butyl titanate, silver nitrate, and sodium hydroxide in water at 473 K for 3 h. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy were used to determine the structure and morphology of the synthesized Ag-modified TiO2 nanomaterial. The diffuse reflectance UV-visible and photoluminescence spectroscopy results revealed that metallic Ag nanoparticles decreased the optical band gap and photoluminescence intensity of the TiO2. In addition, the Raman peak intensity and absorbance were increased after Ag modification onto TiO2. The photocatalytic efficiency of the synthesized samples was tested for decomposition of aqueous hydrazine solution under visible light irradiation. The photocatalytic efficiency of Ag-modified TiO2 nanomaterials was higher than that of bare TiO2 and Ag metal NPs due to the synergistic effect between the Ag metal and TiO2 structures. In addition, the surface plasmon resonance (SPR) electron transfer from Ag metal particles to the conduction band of TiO2 is responsible for superior activity of TiO2-Ag catalyst. The Ag-modified TiO2 nanomaterials offered a 100% H2 selectivity within 30 min of reaction time and an apparent rate constant of 0.018 min-1 with an activation energy of 34.4 kJ/mol under visible light radiation.
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Affiliation(s)
- Shaeel Ahmed Althabaiti
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Zaheer Khan
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Katabathini Narasimharao
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Salem Mohamed Bawaked
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Soad Zahir Al-Sheheri
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Mohamed Mokhtar
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Maqsood Ahmad Malik
- Department of Chemistry, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi-110025, India
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8
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Calabrese C, Maertens A, Piras A, Aprile C, Liotta LF. Novel Sol-Gel Synthesis of TiO 2 Spherical Porous Nanoparticles Assemblies with Photocatalytic Activity. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1928. [PMID: 37446444 DOI: 10.3390/nano13131928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023]
Abstract
For this study, the synthesis of TiO2 nanomaterials was performed via a novel sol-gel method employing titanium butoxide as a metal precursor, Pluronic F127 as a templating agent, toluene as a swelling agent, and acidic water or ethanol as the reaction solvents. The method was designed by tailoring certain reaction parameters, such as the sequence of toluene addition, magnetic stirring, the type of reaction solvent, and the calcination conditions. Analysis of the specific surface area and porosity was carried out via N2 physisorption, whereas the morphological features of the solids were investigated via transmission electron microscopy. The crystalline structure of both the dried powders and the calcined materials was evaluated using X-ray diffraction analysis. It transpired that the different phase compositions of the solids are related to the specific synthesis medium employed. Under the adopted reaction conditions, ethanol, which was used as a reaction solvent, promoted the local arrangement of dispersed anatase particles, the specific arrangement of which does not lead to rutile transformation. Conversely, the use of water alone supported high-particle packing, evolving into a rutile phase. The photodegradation of Rhodamine B was used as a target reaction for testing the photocatalytic activity of the selected samples.
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Affiliation(s)
- Carla Calabrese
- Institute for the Study of Nanostructured Materials (ISMN)-CNR, via Ugo La Malfa, 153, 90146 Palermo, Italy
| | - Amélie Maertens
- Unit of Nanomaterials Chemistry, Department of Chemistry, University of Namur, NISM, Rue de Bruxelles, 61-5000 Namur, Belgium
| | - Alessandra Piras
- Unit of Nanomaterials Chemistry, Department of Chemistry, University of Namur, NISM, Rue de Bruxelles, 61-5000 Namur, Belgium
- DEsign & Synthesis of INorganic materials for Energy applications (DESINe) Group, Institute for Materials Research (Imo-Imomec), Hasselt University, Agoralaan Building D, 3590 Diepenbeek, Belgium
| | - Carmela Aprile
- Unit of Nanomaterials Chemistry, Department of Chemistry, University of Namur, NISM, Rue de Bruxelles, 61-5000 Namur, Belgium
| | - Leonarda Francesca Liotta
- Institute for the Study of Nanostructured Materials (ISMN)-CNR, via Ugo La Malfa, 153, 90146 Palermo, Italy
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9
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Estévez Ruiz EP, Lago JL, Thirumuruganandham SP. Experimental Studies on TiO 2 NT with Metal Dopants through Co-Precipitation, Sol-Gel, Hydrothermal Scheme and Corresponding Computational Molecular Evaluations. MATERIALS (BASEL, SWITZERLAND) 2023; 16:3076. [PMID: 37109913 PMCID: PMC10143655 DOI: 10.3390/ma16083076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 03/19/2023] [Accepted: 03/23/2023] [Indexed: 06/19/2023]
Abstract
In the last decade, TiO2 nanotubes have attracted the attention of the scientific community and industry due to their exceptional photocatalytic properties, opening a wide range of additional applications in the fields of renewable energy, sensors, supercapacitors, and the pharmaceutical industry. However, their use is limited because their band gap is tied to the visible light spectrum. Therefore, it is essential to dope them with metals to extend their physicochemical advantages. In this review, we provide a brief overview of the preparation of metal-doped TiO2 nanotubes. We address hydrothermal and alteration methods that have been used to study the effects of different metal dopants on the structural, morphological, and optoelectrical properties of anatase and rutile nanotubes. The progress of DFT studies on the metal doping of TiO2 nanoparticles is discussed. In addition, the traditional models and their confirmation of the results of the experiment with TiO2 nanotubes are reviewed, as well as the use of TNT in various applications and the future prospects for its development in other fields. We focus on the comprehensive analysis and practical significance of the development of TiO2 hybrid materials and the need for a better understanding of the structural-chemical properties of anatase TiO2 nanotubes with metal doping for ion storage devices such as batteries.
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Affiliation(s)
- Eduardo Patricio Estévez Ruiz
- Centro de Investigación de Ciencias Humanas y de la Educación (CICHE), Universidad Indoamérica, Ambato 180103, Ecuador
- Grupo de Polímeros, Departamento de Física y Ciencias de la Tierra, Escuela Universitaria Politécnica, Universidade da Coruña, 15471 Ferrol, Spain
| | - Joaquín López Lago
- Grupo de Polímeros, Departamento de Física y Ciencias de la Tierra, Escuela Universitaria Politécnica, Universidade da Coruña, 15471 Ferrol, Spain
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10
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Xiang H, Ferla S, Varricchio C, Brancale A, Brown NL, Black GW, Turner NJ, Castagnolo D. Biocatalytic and Chemo-Enzymatic Synthesis of Quinolines and 2-Quinolones by Monoamine Oxidase (MAO-N) and Horseradish Peroxidase (HRP) Biocatalysts. ACS Catal 2023; 13:3370-3378. [PMID: 36910872 PMCID: PMC9990064 DOI: 10.1021/acscatal.2c05902] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/15/2023] [Indexed: 02/24/2023]
Abstract
The oxidative aromatization of aliphatic N-heterocycles is a fundamental organic transformation for the preparation of a diverse array of heteroaromatic compounds. Despite many attempts to improve the efficiency and practicality of this transformation, most synthetic methodologies still require toxic and expensive reagents as well as harsh conditions. Herein, we describe two enzymatic strategies for the oxidation of 1,2,3,4-tetrahydroquinolines (THQs) and N-cyclopropyl-N-alkylanilines into quinolines and 2-quinolones, respectively. Whole cells and purified monoamine oxidase (MAO-N) enzymes were used to effectively catalyze the biotransformation of THQs into the corresponding aromatic quinoline derivatives, while N-cyclopropyl-N-alkylanilines were converted into 2-quinolone compounds through a horseradish peroxidase (HRP)-catalyzed annulation/aromatization reaction followed by Fe-mediated oxidation.
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Affiliation(s)
- Haoyue Xiang
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Salvatore Ferla
- Medical School, Faculty of Medicine, Health and Life Science, Swansea University, Swansea SA2 8PP, U.K
| | - Carmine Varricchio
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff CF10 3NB, U.K
| | - Andrea Brancale
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff CF10 3NB, U.K.,University of Chemistry and Technology, Prague, 166 28 Prague 6, Czech Republic
| | - Nicola L Brown
- Department of Applied Sciences, Northumbria University, Newcastle upon Tyne NE1 8ST, U.K
| | - Gary W Black
- Department of Applied Sciences, Northumbria University, Newcastle upon Tyne NE1 8ST, U.K
| | - Nicholas J Turner
- Department of Chemistry, University of Manchester, Manchester Institute of Biotechnology, 131 Princess Street, Manchester M1 7DN, U.K
| | - Daniele Castagnolo
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
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11
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Luo J, Wei X, Qiao Y, Wu C, Li L, Chen L, Shi J. Photoredox-Promoted Co-Production of Dihydroisoquinoline and H 2 O 2 over Defective Zn 3 In 2 S 6. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2210110. [PMID: 36600630 DOI: 10.1002/adma.202210110] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/13/2022] [Indexed: 06/17/2023]
Abstract
One of the most sustainable and promising approaches for hydrogen peroxide (H2 O2 ) production in a low-cost and environment-friendly way is photosynthesis, which, however, suffers from poor carrier utilization and low H2 O2 productivity. The addition of proton donors such as isopropanol or ethanol can increase H2 O2 production, which, unfortunately, will inevitably elevate the entire cost while wasting the oxidizing power of holes (h+ ). Herein, the tetrahydroisoquinolines (THIQs) is employed as a distinctive proton donor for the thermodynamically feasible and selective semi-dehydrogenation reaction to highly valuable dihydroisoquinolines (DHIQs), and meanwhile, to couple with and promote H2 O2 generation in one photoredox reaction under the photocatalysis by dual-functional Zn3 In2 S6 photocatalyst. Surprisingly, the suitably defective Zn3 In2 S6 offers an excellent and near-stoichiometric co-production performance of H2 O2 and DHIQs at unprecedentedly high rates of 66.4 and 62.1 mmol h-1 g-1 under visible light (λ ≥ 400 nm), respectively, which outperforms all the previously available reports even though sacrificial agents were employed in those reports. Additionally, photocatalytic redox reaction mechanism demonstrates that H2 O2 can be generated through multiple pathways, highlighting the synergistic effect among ROS (·O2 - and 1 O2 ), h+ and proton donor, which has been ignored in previous studies.
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Affiliation(s)
- Juanjuan Luo
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Xinfa Wei
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Yang Qiao
- Suzhou NATA Opto-Electronic Materials Ltd, Suzhou, 215127, China
| | - Chenyao Wu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Lanxin Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Lisong Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
- Institute of Eco-Chongming, Shanghai, 202162, China
| | - Jianlin Shi
- State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
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12
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Rh-Catalyzed Environmentally Benign Selective Hydrogenation of a Broad Variety of Functional Groups Using Al-Water as a Hydrogen Source. Catalysts 2022. [DOI: 10.3390/catal12121578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Supported rhodium catalysts were screened to catalyze the one-step hydrogenation of a broad variety of functional groups. The results show that 5% Rh/Al2O3 and 5% Rh/C performed well in controlling selective hydrogenation under the desired amount of time and temperature. In this regard, partial and full hydrogenation were achieved by controlling reaction time or temperature. In addition to aliphatic C–C, C–N, C–O, and N–O multiple bonds, the applicability of this method was demonstrated by the hydrogenation of C=C double bonds of arenes, which is considered challenging. Importantly, the Al-H2O system producing hydrogen in situ and the high, controllable selectivity make this protocol environmentally benign and highly efficient.
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13
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Verma PK. Advancement in photocatalytic acceptorless dehydrogenation reactions: Opportunity and challenges for sustainable catalysis. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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14
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Mansoor A, Khurshid Z, Khan MT, Mansoor E, Butt FA, Jamal A, Palma PJ. Medical and Dental Applications of Titania Nanoparticles: An Overview. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12203670. [PMID: 36296859 PMCID: PMC9611494 DOI: 10.3390/nano12203670] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 10/08/2022] [Accepted: 10/09/2022] [Indexed: 05/25/2023]
Abstract
Currently, titanium oxide (TiO2) nanoparticles are successfully employed in human food, drugs, cosmetics, advanced medicine, and dentistry because of their non-cytotoxic, non-allergic, and bio-compatible nature when used in direct close contact with the human body. These NPs are the most versatile oxides as a result of their acceptable chemical stability, lower cost, strong oxidation properties, high refractive index, and enhanced aesthetics. These NPs are fabricated by conventional (physical and chemical) methods and the latest biological methods (biological, green, and biological derivatives), with their advantages and disadvantages in this epoch. The significance of TiO2 NPs as a medical material includes drug delivery release, cancer therapy, orthopedic implants, biosensors, instruments, and devices, whereas their significance as a dental biomaterial involves dentifrices, oral antibacterial disinfectants, whitening agents, and adhesives. In addition, TiO2 NPs play an important role in orthodontics (wires and brackets), endodontics (sealers and obturating materials), maxillofacial surgeries (implants and bone plates), prosthodontics (veneers, crowns, bridges, and acrylic resin dentures), and restorative dentistry (GIC and composites).
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Affiliation(s)
- Afsheen Mansoor
- Department of Dental Material Sciences, School of Dentistry, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad 44080, Pakistan
| | - Zohaib Khurshid
- Department of Prosthodontics and Dental Implantology, College of Dentistry, King Faisal University, Al-Ahsa 31982, Saudi Arabia;
| | - Muhammad Talal Khan
- Department of Dental Biomaterials, Bakhtawar Amin Medical and Dental College, Multan 60650, Pakistan;
| | - Emaan Mansoor
- Islamic International Dental College, Riphah International University, Islamabad 44000, Pakistan;
| | - Faaz Ahmad Butt
- Department of Materials Engineering, NED University of Engineering & Technology, Karachi 74200, Pakistan;
| | - Asif Jamal
- Department of Microbiology, Quaid-i-Azam University, Islamabad 45320, Pakistan;
| | - Paulo J. Palma
- Center for Innovation and Research in Oral Sciences (CIROS), Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal
- Institute of Endodontics, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal
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15
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Sayed M, Shi Z, Gholami F, Fatehi P, Soliman AIA. Ag@TiO 2 Nanocomposite as an Efficient Catalyst for Knoevenagel Condensation. ACS OMEGA 2022; 7:32393-32400. [PMID: 36120061 PMCID: PMC9476541 DOI: 10.1021/acsomega.2c03852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
In the present study, a new series of different heterocycles was synthesized through base-free Knoevenagel condensation of various aldehydes and active methylene-containing compounds using the hydrothermal developed Ag@TiO2 as a heterogeneous catalyst. The catalyst was synthesized by mixing TiO2 (P25) with AgNO3 and hydrothermally treated in ethanol at 180 °C for 12 h. The developed Ag@TiO2 catalyst was directly applied for Knoevenagel condensation, and the optimized procedure involved stirring the aldehydes and active methylene-containing compounds with Ag@TiO2 in ethanol at 65 °C. The reaction scope was investigated for various aromatic and heterocyclic aldehydes with active methylene-containing compounds, and the isolated yields were significantly high. The reusability of the catalyst was investigated for up to five cycles, where an insignificant decrease in the catalyst's reactivity was observed. Also, the reaction could proceed in water as a solvent, and the isolated yield was 40%. Hence, this protocol features mild reaction conditions, a facile procedure, and clean reaction profiles.
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Affiliation(s)
- Mostafa Sayed
- Department
of Chemistry, University of Science and
Technology of China, Hefei 230026, China
- Chemistry
Department, Faculty of Science, New Valley
University, El-Kharja 72511, Egypt
| | - Zhipeng Shi
- Department
of Chemistry, University of Science and
Technology of China, Hefei 230026, China
| | - Farzad Gholami
- Chemical
Engineering Department, Lakehead University, Thunder Bay, ON P7B5E1, Canada
| | - Pedram Fatehi
- Chemical
Engineering Department, Lakehead University, Thunder Bay, ON P7B5E1, Canada
| | - Ahmed I. A. Soliman
- Chemical
Engineering Department, Lakehead University, Thunder Bay, ON P7B5E1, Canada
- Chemistry
Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
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16
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Kominami H, Yato R, Tanaka A. Hydrogen‐free hydrogenation of a nitrogen‐containing ring of quinolines in an alcoholic suspension of a titanium(IV) oxide photocatalyst modified with metal cocatalysts. ChemCatChem 2022. [DOI: 10.1002/cctc.202200674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hiroshi Kominami
- Kindai University: Kinki Daigaku Applied Chemistry Kowakae 5778502 Higashiosaka JAPAN
| | - Ryuichi Yato
- Kindai University: Kinki Daigaku Applied Chemistry JAPAN
| | - Atsuhiro Tanaka
- Kindai University: Kinki Daigaku Applied Chemistry Kowakae 5778502 Higashiosaka JAPAN
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17
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Ibrahim MYS, Bennett JA, Abolhasani M. Continuous Room-Temperature Hydrogen Release from Liquid Organic Carriers in a Photocatalytic Packed-Bed Flow Reactor. CHEMSUSCHEM 2022; 15:e202200733. [PMID: 35446510 PMCID: PMC9400973 DOI: 10.1002/cssc.202200733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 04/20/2022] [Indexed: 06/14/2023]
Abstract
Despite the potential of hydrogen (H2 ) storage in liquid organic carriers to achieve carbon neutrality, the energy required for H2 release and the cost of catalyst recycling have hindered its large-scale adoption. In response, a photo flow reactor packed with rhodium (Rh)/titania (TiO2 ) photocatalyst was reported for the continuous and selective acceptorless dehydrogenation of 1,2,3,4-tetrahydroquinoline to H2 gas and quinoline under visible light irradiation at room temperature. The tradeoff between the reactor pressure drop and its photocatalytic surface area was resolved by selective in-situ photodeposition of Rh in the photo flow reactor post-packing on the outer surface of the TiO2 microparticles available to photon flux, thereby reducing the optimal Rh loading by 10 times compared to a batch reactor, while facilitating catalyst reuse and regeneration. An example of using quinoline as a hydrogen acceptor to lower the energy of the hydrogen production step was demonstrated via the water-gas shift reaction.
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Affiliation(s)
- Malek Y. S. Ibrahim
- Department of Chemical and Biomolecular EngineeringNorth Carolina State University911 Partners WayRaleighNC 27695USA
| | - Jeffrey A. Bennett
- Department of Chemical and Biomolecular EngineeringNorth Carolina State University911 Partners WayRaleighNC 27695USA
| | - Milad Abolhasani
- Department of Chemical and Biomolecular EngineeringNorth Carolina State University911 Partners WayRaleighNC 27695USA
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18
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Zhao M, Li X, Zhang X, Shao Z. Efficient Synthesis of C3-Alkylated and Alkenylated Indoles via Manganese-Catalyzed Dehydrogenation. Chem Asian J 2022; 17:e202200483. [PMID: 35771722 DOI: 10.1002/asia.202200483] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/15/2022] [Indexed: 11/10/2022]
Abstract
The catalytic dehydrogenation of alcohols is essential for the sustainable production of valuable products. This provids a new strategy for green organic synthesis in chemical industries. Herein, we describe a manganese-based catalytic system that enables the efficient synthesis of C3-alkylated indoles from benzyl alcohols and indoles via the borrowing hydrogen process. Furthermore, dehydrogenative coupling of 2-arylethanols and indoles yields C3-alkenylated indoles. Meanwhile, reacting 2-aminophenethanol instead of indoles can also obtain the corresponding indole products with high selectivity under the same conditions.
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Affiliation(s)
- Mingqin Zhao
- Henan University, College of Tobacco Science, CHINA
| | - Xinyan Li
- Henan Agricultural University, College of Tobacco Science, CHINA
| | - Xiaoyu Zhang
- Henan Agricultural University, College of Tobacco Science, CHINA
| | - Zhihui Shao
- Henan Agricultural University, College of Tobacco Science, Wenhua Road, 450002, Zhengzhou, CHINA
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19
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Kumar A, Dhameliya TM, Sharma K, Patel KA, Hirani RV. Environmentally Benign Approaches towards the Synthesis of Quinolines. ChemistrySelect 2022. [DOI: 10.1002/slct.202201059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Asim Kumar
- Amity Institute of Pharmacy Amity University Haryana, Panchgaon, Manesar 122 413 Haryana India
| | - Tejas M. Dhameliya
- Department of Pharmaceutical Chemistry and Quality Assurance L. M. College of Pharmacy, Navrangpura, Ahmedabad 380 009 Gujarat India
| | - Kirti Sharma
- Amity Institute of Pharmacy Amity University Haryana, Panchgaon, Manesar 122 413 Haryana India
| | - Krupa A. Patel
- Department of Pharmaceutical Chemistry and Quality Assurance L. M. College of Pharmacy, Navrangpura, Ahmedabad 380 009 Gujarat India
| | - Rajvi V. Hirani
- Department of Pharmaceutical Chemistry and Quality Assurance L. M. College of Pharmacy, Navrangpura, Ahmedabad 380 009 Gujarat India
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20
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Pt-Modified Interfacial Engineering for Enhanced Photocatalytic Performance of 3D Ordered Macroporous TiO2. CRYSTALS 2022. [DOI: 10.3390/cryst12060778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Narrowing the band gap and increasing the photodegradation efficiency of TiO2-based photocatalysts are very important for their wide application in environment-related fields such as photocatalytic degradation of toxic pollutants in wastewater. Herein, a three-dimensionally ordered macroporous Pt-loaded TiO2 photocatalyst (3DOM Pt/TiO2) has been successfully synthesized using a facile colloidal crystal-template method. The resultant composite combines several morphological/structural advantages, including uniform 3D ordered macroporous skeletons, high crystallinity, large porosity and an internal electric field formed at Pt/TiO2 interfaces. These unique features enable the 3DOM Pt/TiO2 to possess a large surface for photocatalytic reactions and fast diffusion for mass transfer of reactants as well as efficient suppression of recombination for photogenerated electron-hole pairs in TiO2. Thus, the 3DOM Pt/TiO2 exhibits significantly enhanced photocatalytic activity. Typically, 88% of RhB can be degraded over the 3DOM Pt/TiO2 photocatalyst under visible light irradiation (λ ≥ 420 nm) within 100 min, much higher than that of the commercial TiO2 nanoparticles (only 37%). The underlying mechanism for the enhanced photocatalytic activity of 3DOM Pt/TiO2 has been further analyzed based on energy band theory and ascribed to the formation of Schottky-type Pt/TiO2 junctions. The proposed method herein can provide new references for further improving the photocatalytic efficiency of other photocatalysts via rational structural/morphological engineering.
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21
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Mejuto C, Ibáñez-Ibáñez L, Guisado-Barrios G, Mata JA. Visible-Light-Promoted Iridium(III)-Catalyzed Acceptorless Dehydrogenation of N-Heterocycles at Room Temperature. ACS Catal 2022; 12:6238-6245. [PMID: 35633898 PMCID: PMC9128065 DOI: 10.1021/acscatal.2c01224] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/29/2022] [Indexed: 12/14/2022]
Abstract
![]()
An effective visible-light-promoted
iridium(III)-catalyzed hydrogen
production from N-heterocycles is described. A single iridium complex
constitutes the photocatalytic system playing a dual task, harvesting
visible-light and facilitating C–H cleavage and H2 formation at room temperature and without additives. The presence
of a chelating C–N ligand combining a mesoionic carbene ligand
along with an amido functionality in the IrIII complex
is essential to attain the photocatalytic transformation. Furthermore,
the IrIII complex is also an efficient catalyst for the
thermal reverse process under mild conditions, positioning itself
as a proficient candidate for liquid organic hydrogen carrier technologies
(LOHCs). Mechanistic studies support a light-induced formation of
H2 from the Ir–H intermediate as the operating mode
of the iridium complex.
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Affiliation(s)
- Carmen Mejuto
- Institute of Advanced Materials (INAM), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Jaume I, Avda. Sos Baynat s/n, 12006 Castellón, Spain
| | - Laura Ibáñez-Ibáñez
- Institute of Advanced Materials (INAM), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Jaume I, Avda. Sos Baynat s/n, 12006 Castellón, Spain
| | - Gregorio Guisado-Barrios
- Departamento de Química Inorgánica. Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Jose A. Mata
- Institute of Advanced Materials (INAM), Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Jaume I, Avda. Sos Baynat s/n, 12006 Castellón, Spain
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22
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Gao F, Zhang S, Lv Q, Yu B. Recent advances in graphene oxide catalyzed organic transformations. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.10.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Echevarría I, Vaquero M, Manzano BR, Jalón FA, Quesada R, Espino G. Photocatalytic Aerobic Dehydrogenation of N-Heterocycles with Ir(III) Photosensitizers Bearing the 2(2'-Pyridyl)benzimidazole Scaffold. Inorg Chem 2022; 61:6193-6208. [PMID: 35394766 PMCID: PMC9044454 DOI: 10.1021/acs.inorgchem.2c00358] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Photoredox catalysis constitutes a very powerful tool in organic synthesis, due to its versatility, efficiency, and the mild conditions required by photoinduced transformations. In this paper, we present an efficient and selective photocatalytic procedure for the aerobic oxidative dehydrogenation of partially saturated N-heterocycles to afford the respective N-heteroarenes (indoles, quinolines, acridines, and quinoxalines). The protocol involves the use of new Ir(III) biscyclometalated photocatalysts of the general formula [Ir(C^N)2(N^N')]Cl, where the C^N ligand is 2-(2,4-difluorophenyl)pyridinate, and N^N' are different ligands based on the 2-(2'-pyridyl)benzimidazole scaffold. In-depth electrochemical and photophysical studies as well as DFT calculations have allowed us to establish structure-activity relationships, which provide insights for the rational design of efficient metal-based dyes in photocatalytic oxidation reactions. In addition, we have formulated a dual mechanism, mediated by the radical anion superoxide, for the above-mentioned transformations.
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Affiliation(s)
- Igor Echevarría
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Mónica Vaquero
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Blanca R Manzano
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Avda. Camilo J. Cela 10, 13071 Ciudad Real, Spain
| | - Félix A Jalón
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Avda. Camilo J. Cela 10, 13071 Ciudad Real, Spain
| | - Roberto Quesada
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Gustavo Espino
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain
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24
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Sharma D, Kumar M, Kumar S, Basu A, Bhattacherjee D, Chaudhary A, Das P. Application of Cyclohexane‐1,3‐diones in the Synthesis of Six‐Membered Nitrogen‐Containing Heterocycles. ChemistrySelect 2022. [DOI: 10.1002/slct.202200622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
Affiliation(s)
- Dharminder Sharma
- Department of Chemistry Jagdish Chandra DAV College Dasuya Punjab 144205 India
| | - Manish Kumar
- Department of Chemistry Govt. College Seraj at Lambathach 175048 HP Mandi India
- Chemical Technology Department CSIR-Institute of Himalayan Bioresource Technology Palampur 176061, HP India
| | - Sandeep Kumar
- Department of Chemistry DAV University Jalandhar 144012 Punjab India
- Chemical Technology Department CSIR-Institute of Himalayan Bioresource Technology Palampur 176061, HP India
| | - Amartya Basu
- Department of General Medicine Kalinga Institute of Medical Sciences Bhubaneswar 751024 Odisha India
| | - Dhananjay Bhattacherjee
- Chemical Technology Department CSIR-Institute of Himalayan Bioresource Technology Palampur 176061, HP India
| | - Abha Chaudhary
- Chemical Technology Department CSIR-Institute of Himalayan Bioresource Technology Palampur 176061, HP India
- Department of Chemistry Government Post Graduate College Ambala Cantt Haryana 133001 India
| | - Pralay Das
- Chemical Technology Department CSIR-Institute of Himalayan Bioresource Technology Palampur 176061, HP India
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25
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Hu H, Nie Y, Tao Y, Huang W, Qi L, Nie R. Metal-free carbocatalyst for room temperature acceptorless dehydrogenation of N-heterocycles. SCIENCE ADVANCES 2022; 8:eabl9478. [PMID: 35089786 PMCID: PMC8797793 DOI: 10.1126/sciadv.abl9478] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 12/07/2021] [Indexed: 06/14/2023]
Abstract
Catalytic dehydrogenation enables reversible hydrogen storage in liquid organics as a critical technology to achieve carbon neutrality. However, oxidant or base-free catalytic dehydrogenation at mild temperatures remains a challenge. Here, we demonstrate a metal-free carbocatalyst, nitrogen-assembly carbons (NCs), for acceptorless dehydrogenation of N-heterocycles even at ambient temperature, showing greater activity than transition metal-based catalysts. Mechanistic studies indicate that the observed catalytic activity of NCs is because of the unique closely placed graphitic nitrogens (CGNs), formed by the assembly of precursors during the carbonization process. The CGN site catalyzes the activation of C─H bonds in N-heterocycles to form labile C─H bonds on catalyst surface. The subsequent facile recombination of this surface hydrogen to desorb H2 allows the NCs to work without any H-acceptor. With reverse transfer hydrogenation of various N-heterocycles demonstrated in this work, these NC catalysts, without precious metals, exhibit great potential for completing the cycle of hydrogen storage.
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Affiliation(s)
- Haitao Hu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
- School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Yunqing Nie
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
- School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Yuewen Tao
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
- School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Wenyu Huang
- U.S. DOE Ames Laboratory, Ames, IA 50011, USA
- Department of Chemistry, Iowa State University, Ames, IA 50011, USA
| | - Long Qi
- U.S. DOE Ames Laboratory, Ames, IA 50011, USA
| | - Renfeng Nie
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
- School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
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26
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Nayek N, Karmakar P, Mandal M, Karmakar I, Brahmachari G. Photochemical and electrochemical regioselective cross-dehydrogenative C(sp 2)–H sulfenylation and selenylation of substituted benzo[ a]phenazin-5-ols. NEW J CHEM 2022. [DOI: 10.1039/d2nj02224a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The essence of photo- and electrochemistry: sulfenylation and selenylation of substituted benzo[a]phenazin-5-ols through cross-dehydrogenative C(sp2)–H functionalization.
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Affiliation(s)
- Nayana Nayek
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (a Central University), Santiniketan-731 235, West Bengal, India
| | - Pintu Karmakar
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (a Central University), Santiniketan-731 235, West Bengal, India
| | - Mullicka Mandal
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (a Central University), Santiniketan-731 235, West Bengal, India
| | - Indrajit Karmakar
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (a Central University), Santiniketan-731 235, West Bengal, India
| | - Goutam Brahmachari
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (a Central University), Santiniketan-731 235, West Bengal, India
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27
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Abstract
In an attempt to improve the photocatalytic activity of anatase TiO2, we developed a composite photocatalyst composed of hollow TiO2 microspheres (hTS) and graphene. The hTS were prepared through a two-step hydrothermal process, where SiO2 microspheres with desirable diameters of 100–400 nm were used as sacrificial templates. Accordingly, the effect of the hTS cavity size on the activity of the catalyst in wet CO2 photoreduction (CO2PR) was studied. Furthermore, it was established that the hydrothermal pH value crucially influences the photocatalytic activity of the hTS photocatalyst, as well as its composition and microstructure. The hTS photocatalyst was also combined with graphene (0–90 wt%) to improve its photocatalytic activity. This study provides insight into the optimal microsphere diameter, hydrothermal pH value, and graphene/hTSx ratio required for designing hollow microsphere-based photocatalysts with enhanced CO2PR performances.
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28
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Bera A, Bera S, Banerjee D. Recent advances in the synthesis of N-heteroarenes via catalytic dehydrogenation of N-heterocycles. Chem Commun (Camb) 2021; 57:13042-13058. [PMID: 34781335 DOI: 10.1039/d1cc04919d] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Bio-active molecules having N-heteroarene core are widely used for numerous medicinal applications and as lifesaving drugs. In this direction, dehydrogenation of partially saturated aromatic N-heterocycles shows utmost importance for the synthesis of heterocycles. This feature article highlights the recent advances, from 2009 to April 2021, on the dehydrogenation of N-heteroaromatics. Notable features considering the development of newer catalysis for dehydrogenations are: (i) approaches based on precious metal catalysis, (ii) newer strategies and catalyst development technology using non-precious metal-catalysts for N-heterocycles having one or more heteroatoms, (iii) Synthesis of five or six-membered N-heterocycles using photocatalysis, electrocatalytic, and organo-catalytic approaches using different homogeneous and heterogeneous conditions' (iv) metal free (base and acid-promoted) dehydrogenation along with I2, N-hydroxyphthalimide (NHPI) and bio catalyzed miscellaneous examples have also been discussed, (v) mechanistic studies for various dehydrogenation reactions and (vi) synthetic applications of various bio-active molecules including post-drug derivatization are discussed.
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Affiliation(s)
- Atanu Bera
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
| | - Sourajit Bera
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
| | - Debasis Banerjee
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee-247667, Uttarakhand, India.
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29
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Subaramanian M, Sivakumar G, Balaraman E. First-Row Transition-Metal Catalyzed Acceptorless Dehydrogenation and Related Reactions: A Personal Account. CHEM REC 2021; 21:3839-3871. [PMID: 34415674 DOI: 10.1002/tcr.202100165] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 07/17/2021] [Accepted: 08/04/2021] [Indexed: 12/17/2022]
Abstract
The development of sustainable catalytic protocols that circumvent the use of expensive and precious metal catalysts and avoid toxic reagents plays a crucial role in organic synthesis. Indeed, the direct employment of simple and abundantly available feedstock chemicals as the starting materials broadens their synthetic application in contemporary research. In particular, the transition metal-catalyzed diversification of alcohols with various nucleophilic partners to construct a wide range of building blocks is a powerful and highly desirable methodology. Moreover, the replacement of precious metal catalysts by non-precious and less toxic metals for selective transformations is one of the main goals and has been paid significant attention to in modern chemistry. In view of this, the first-row transition metal catalysts find extensive applications in various synthetic transformations such as catalytic hydrogenation, dehydrogenation, and related reactions. Herein, we have disclosed our recent developments on the base-metal catalysis such as Mn, Fe, Co, and Ni for the acceptorless dehydrogenation reactions and its application in the C-C and C-N bond formation via hydrogen auto-transfer (HA) and acceptorless dehydrogenation coupling (ADC) reactions. These HA/ADC protocols employ alcohol as alkylating agents and eliminate water and/or hydrogen gas as by-products, representing highly atom-efficient and environmentally benign reactions. Furthermore, diverse simple to complex organic molecules synthesis by C-C and C-N bond formation using feedstock alcohols are also overviewed. Overall, this account deals with the contribution and development of efficient and novel homogeneous as well as heterogeneous base-metal catalysts for sustainable chemical synthesis.
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Affiliation(s)
- Murugan Subaramanian
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, 517507, India
| | - Ganesan Sivakumar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, 517507, India
| | - Ekambaram Balaraman
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, 517507, India
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30
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Niu X, Yang L. Manganese(III) Acetate Catalyzed Aerobic Dehydrogenation of Tertiary Indolines, Tetrahydroquinolines and an
N
‐Unsubstituted Indoline. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100581] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Xiaokang Niu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education Collaborative Innovation Center for the Manufacture of Fluorine and Silicone Fine Chemicals and Materials Hangzhou Normal University 311121 Hangzhou People's Republic of China
| | - Lei Yang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education Collaborative Innovation Center for the Manufacture of Fluorine and Silicone Fine Chemicals and Materials Hangzhou Normal University 311121 Hangzhou People's Republic of China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences 730000 Lanzhou People's Republic of China
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31
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Xiang M, Xu Z, Wang J, Yang X, Yan Z. Accelerating H 2 Evolution by Anodic Semi-dehydrogenation of Tetrahydroisoquinolines in Water over Co 3 O 4 Nanoribbon Arrays Decorated Nickel Foam. Chemistry 2021; 27:7502-7506. [PMID: 33772891 DOI: 10.1002/chem.202100249] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Indexed: 12/15/2022]
Abstract
Coupling the H2 evolution reaction in water with thermodynamically favorable organic oxidation reactions is highly desirable, because it can enhance the energy conversion efficiency compared with electrocatalytic water splitting, and produce value-added chemicals instead of O2 in the anodic reaction. Herein, Co3 O4 nanoribbon arrays in situ grown on nickel foam (Co3 O4 @NF) was employed as an effective electrocatalyst for the selective oxidation of tetrahydroisoquinolines (THIQs). Various value-added semi-dehydrogenation products including dihydroisoquinolines with electro-deficient or -rich groups could be obtained with moderate yields and faradaic efficiencies. Benefitting from the rich surface active sites of Co3 O4 @NF, a two-electrode (Co3 O4 @NF||Pt) electrolytic system drove a benchmark current density of 10 mA cm-2 at a cell voltage as low as 1.446 V in 1.0 M KOH aqueous solution containing 0.02 M THIQ, which was reduced by 174 mV in comparison with that of overall water splitting.
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Affiliation(s)
- Ming Xiang
- Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University, Wuhan, 430056, P. R. China
| | - Zhihua Xu
- Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University, Wuhan, 430056, P. R. China
| | - Jinghao Wang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Xiaoqiu Yang
- Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University, Wuhan, 430056, P. R. China
| | - Zhaoxiong Yan
- Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University, Wuhan, 430056, P. R. China
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32
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Xiong MF, Peng HL, Zhang XP, Ye BH. Discrepancy between Proline and Homoproline in Chiral Recognition and Diastereomeric Photoreactivity with Iridium(III) Complexes. Inorg Chem 2021; 60:5423-5431. [PMID: 33818063 DOI: 10.1021/acs.inorgchem.1c00387] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The chiral-recognition processes of homoproline (hpro) and [Ir(pq)2(MeCN)2](PF6) (pq is 2-phenylquinoline; MeCN is acetonitrile) are investigated, in favor of formation of the thermodynamically stable diastereomers Λ-[Ir(pq)2(d-hpro)] and Δ-[Ir(pq)2(l-hpro)]. Moreover, the diastereoselective photoreactions of Δ-[Ir(pq)2(d-hpro)] and Δ-[Ir(pq)2(l-hpro)] are reported in the presence of O2 at room temperature. Diastereomer Δ-[Ir(pq)2(l-hpro)] is dehydrogenatively oxidized into imino acid complex Δ-[Ir(pq)2(hpro-2H2)] (hpro-2H2 is 3,4,5,6-tetrahydropicalinate), while diastereomer Δ-[Ir(pq)2(d-hpro)] occurs by interligand C-N cross-coupling and dehydrogenative oxidation reactions, affording three products: Δ-[Ir(pq)(d-pqh)] [pqh is N-(2-phenylquinolin-8-yl)homoproline], Δ-[Ir(pq)2(hpro-2H2)], and Δ-[Ir(pq)2(d-hpro-2H6)] [hpro-2H6 is 2,3,4,5-tetrahydropicalinate]. The C-N cross-coupling and dehydrogenative oxidation reactions are competitive, and the dehydrogenative oxidation reactions are regioselective. By optimization of the photoreaction parameters such as the diastereomeric substrate, solvent, and temperature as well as base, each possible competitive product is selectively controlled. In addition, density functional theory calculations are performed to elucidate the distinctly chiral recognition between proline and hpro with an iridium(III) complex.
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Affiliation(s)
- Ming-Feng Xiong
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, Guangdong, China
| | - He-Long Peng
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, Guangdong, China
| | - Xue-Peng Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education School of Chemistry and Chemical Engineering, Shananxi Normal University, Xi'an 710119, China
| | - Bao-Hui Ye
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, Guangdong, China
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33
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Liu Y, Yu T, Zeng Y, Chen J, Yang G, Li Y. Efficient acceptorless dehydrogenation of hydrogen-rich N-heterocycles photocatalyzed by Ni(OH)2@CdSe/CdS quantum dots. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00366f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ni(OH)2@CdSe/CdS QDs exhibit excellent photocatalytic acceptorless dehydrogenation of hydrogen-rich N-heterocycles with the release of hydrogen at ambient temperature.
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Affiliation(s)
- Yanpeng Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- China
| | - Tianjun Yu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- China
| | - Yi Zeng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- China
| | - Jinping Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- China
| | - Guoqiang Yang
- University of Chinese Academy of Sciences
- Beijing
- P. R. China
- Key Laboratory of Photochemistry
- Institute of Chemistry
| | - Yi Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Beijing
- China
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34
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Abstract
Visible light promoted synthetic routes of quinolines using different strategies are hereby documented.
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Affiliation(s)
- Ajay Kumar Dhiya
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Aparna Monga
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Anuj Sharma
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
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35
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Zhang Y, Wang J, Zhou F, Liu J. An effective strategy for hydrogen supply: catalytic acceptorless dehydrogenation of N-heterocycles. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00138h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Catalytic acceptorless dehydrogenation of N-heterocycles will offer great hope to solve numerous existing complex scientific and technological problems with simple, efficient, stable and controllable energy output, especially facilitating development in the field of PEMFC.
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Affiliation(s)
- Yujing Zhang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Jixue Wang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
| | - Feng Zhou
- Dalian National Laboratory for Clean Energy
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Jiacheng Liu
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- P. R. China
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36
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Sanz-Villafruela J, Martínez-Alonso C, Echevarría I, Vaquero M, Carbayo A, Fidalgo J, Rodríguez AM, Cuevas-Vicario JV, Lima JC, Moro AJ, Manzano BR, Jalón FA, Espino G. One-pot photocatalytic transformation of indolines into 3-thiocyanate indoles with new Ir( iii) photosensitizers bearing β-carbolines. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01307b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Herein, we harness the combination of two photocatalytic reactions, promoted by new Ir(iii) photosensitizers, for the direct access to 3-thiocyanato indoles from indolines in a one-pot process.
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37
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Kang N, Wang Q, Djeda R, Wang W, Fu F, Moro MM, Ramirez MDLA, Moya S, Coy E, Salmon L, Pozzo JL, Astruc D. Visible-Light Acceleration of H 2 Evolution from Aqueous Solutions of Inorganic Hydrides Catalyzed by Gold-Transition-Metal Nanoalloys. ACS APPLIED MATERIALS & INTERFACES 2020; 12:53816-53826. [PMID: 33201661 DOI: 10.1021/acsami.0c16247] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Production of hydrogen (H2) upon hydrolysis of inorganic hydrides potentially is a key step in green energy production. We find that visible-light irradiation of aqueous solutions of ammonia-borane (AB) or NaBH4 containing "click"-dendrimer-stabilized alloyed nanocatalysts composed of nanogold and another late transition-metal nanoparticle (LTMNP) highly enhances catalytic activity for H2 generation while also inducing alloy to Au core@M shell nanocatalyst restructuration. In terms of visible-light-induced acceleration of H2 production from both AB and NaBH4, the Au1Ru1 alloy catalysts show the most significant light-boosting effect. Au-Rh and Au-PtNPs are also remarkable with total H2 release time from AB and NaBH4 down to 1.3 min at 25 °C (AuRh), 3 times less than in the dark, and Co is the best earth-abundant metal alloyed with nanogold. This boosting effect is explained by the transfer of plasmon-induced hot electron from the Au atoms to the LTMNP atoms facilitating water O-H oxidative addition on the LTMNP surface, as shown by the large primary kinetic isotope effect kH/kD upon using D2O obtained for both AB and NaBH4. The second simultaneous and progressive effect of visible-light irradiation during these reactions, alloy to Au core@M shell restructuration, enhances the catalytic activity in the recycling, because, in the resulting Au core@M shell, the surface metal (such as Ru) is much more active than the original Au-containing alloy surface in dark reactions. There is no light effect on the rate of hydrogen production for the recycled nanocatalyst because of the absence of Au on the NP surface, but it is still very efficient in hydrogen release during four cycles because of the initial light-induced restructuration, although it is slightly less efficient than the original nanoalloy in the presence of light. The dendritic triazole coordination on each LTMNP surface appears to play a key role in these remarkable light-induced processes.
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Affiliation(s)
- Naixin Kang
- ISM, UMR CNRS N° 5255, Univ. Bordeaux, Talence Cedex 33405, France
| | - Qi Wang
- ISM, UMR CNRS N° 5255, Univ. Bordeaux, Talence Cedex 33405, France
| | - Rodrigue Djeda
- ISM, UMR CNRS N° 5255, Univ. Bordeaux, Talence Cedex 33405, France
| | - Wenjuan Wang
- ISM, UMR CNRS N° 5255, Univ. Bordeaux, Talence Cedex 33405, France
| | - Fangyu Fu
- ISM, UMR CNRS N° 5255, Univ. Bordeaux, Talence Cedex 33405, France
| | - Marta Martinez Moro
- Soft Matter Nanotechnology Lab, CIC biomaGUNE, Paseo Miramón 182, Donostia-San Sebastián 20014, Gipuzkoa, Spain
| | - Maria de Los Angeles Ramirez
- Soft Matter Nanotechnology Lab, CIC biomaGUNE, Paseo Miramón 182, Donostia-San Sebastián 20014, Gipuzkoa, Spain
- Instituto de Nanosistemas (Unsam, Coniset), Av. 25 de Mayo 1021, San Martin, Buenos Aeres 1650, Argentina
| | - Sergio Moya
- Soft Matter Nanotechnology Lab, CIC biomaGUNE, Paseo Miramón 182, Donostia-San Sebastián 20014, Gipuzkoa, Spain
- NanoBioMedical Centre, Adam Mickiewicz University in Poznań, Wszechnicy Piastowskiej 3, Poznań 61-614, Poland
| | - Emerson Coy
- NanoBioMedical Centre, Adam Mickiewicz University in Poznań, Wszechnicy Piastowskiej 3, Poznań 61-614, Poland
| | - Lionel Salmon
- LCC, CNRS & University of Toulouse III, 205 Route de Narbonne, Toulouse Cedex 31077, France
| | - Jean-Luc Pozzo
- ISM, UMR CNRS N° 5255, Univ. Bordeaux, Talence Cedex 33405, France
| | - Didier Astruc
- ISM, UMR CNRS N° 5255, Univ. Bordeaux, Talence Cedex 33405, France
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38
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Abstract
Novel two-dimensional ZnO/Ti3C2Tx hybrid photocatalysts with modified surface areas were prepared using a simple calcination technique. The microstructures, crystalline features, and bonding states of the ZnO structure-covered Ti3C2Tx MXenes were closely characterized using various tools. The photoluminescence intensity of the hybrid photocatalyst was greatly reduced compared to the pristine ZnO, while its Brunauer-Emmett-Teller (BET) surface area increased by more than 100 times. Under solar light illumination, the photocatalytic degradation efficiency of the hybrid photocatalyst for organic pollutants (MO, RhB) appeared to be three-fold larger as compared to pristine ZnO. The superb photocatalytic performance of the photocatalyst was attributed to several factors, such as ideal band alignment, Schottky barrier formation, and large surface area. Moreover, the ZnO/Ti3C2Tx hybrid photocatalyst showed excellent cycling stability. These results suggest that the novel hybrid structure may be a potential candidate for removing organic pollutants in wastewater.
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39
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Bera S, Bera A, Banerjee D. Nickel-Catalyzed Dehydrogenation of N-Heterocycles Using Molecular Oxygen. Org Lett 2020; 22:6458-6463. [DOI: 10.1021/acs.orglett.0c02271] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Sourajit Bera
- Laboratory of Catalysis and Organic Synthesis, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Atanu Bera
- Laboratory of Catalysis and Organic Synthesis, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Debasis Banerjee
- Laboratory of Catalysis and Organic Synthesis, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India
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