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Ammonia Borane: An Extensively Studied, Though Not Yet Implemented, Hydrogen Carrier. ENERGIES 2020. [DOI: 10.3390/en13123071] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Ammonia borane H3N−BH3 (AB) was re-discovered, in the 2000s, to play an important role in the developing hydrogen economy, but it has seemingly failed; at best it has lagged behind. The present review aims at analyzing, in the context of more than 300 articles, the reasons why AB gives a sense that it has failed as an anodic fuel, a liquid-state hydrogen carrier and a solid hydrogen carrier. The key issues AB faces and the key challenges ahead it has to address (i.e., those hindering its technological deployment) have been identified and itemized. The reality is that preventable errors have been made. First, some critical issues have been underestimated and thereby understudied, whereas others have been disproportionally considered. Second, the potential of AB has been overestimated, and there has been an undoubted lack of realistic and practical vision of it. Third, the competition in the field is severe, with more promising and cheaper hydrides in front of AB. Fourth, AB has been confined to lab benches, and consequently its technological readiness level has remained low. This is discussed in detail herein.
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Singh S, Nerella S, Pabbaraja S, Mehta G. Access to 2-Alkyl/Aryl-4-(1 H)-Quinolones via Orthogonal "NH 3" Insertion into o-Haloaryl Ynones: Total Synthesis of Bioactive Pseudanes, Graveoline, Graveolinine, and Waltherione F. Org Lett 2020; 22:1575-1579. [PMID: 32013447 DOI: 10.1021/acs.orglett.0c00172] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An efficient one-pot synthesis of 4-(1H)-quinolones through an orthogonal engagement of diverse o-haloaryl ynones with ammonia in the presence of Cu(I), involving tandem Michael addition and ArCsp2-N coupling, is presented. The substrate scope of this convenient protocol, wherein ammonium carbonate acts as both an in situ ammonia source and a base toward diverse 2-substituted 4-(1H)-quinolones, has been mapped and its efficacy validated through concise total synthesis of bioactive natural products pseudanes (IV, VII, VIII, and XII), graveoline, graveolinine, and waltherione F.
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Affiliation(s)
- Shweta Singh
- Department of Organic Synthesis and Process Chemistry , CSIR-Indian Institute of Chemical Technology , Hyderabad 500007 , India.,School of Chemistry , University of Hyderabad , Hyderabad 500046 , India
| | - Sharanya Nerella
- Department of Organic Synthesis and Process Chemistry , CSIR-Indian Institute of Chemical Technology , Hyderabad 500007 , India
| | - Srihari Pabbaraja
- Department of Organic Synthesis and Process Chemistry , CSIR-Indian Institute of Chemical Technology , Hyderabad 500007 , India
| | - Goverdhan Mehta
- School of Chemistry , University of Hyderabad , Hyderabad 500046 , India
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Ramachandran PV, Drolet MP. Direct, high-yielding, one-step synthesis of vic-diols from aryl alkynes. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.01.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Babenko V, Lane G, Koos AA, Murdock AT, So K, Britton J, Meysami SS, Moffat J, Grobert N. Time dependent decomposition of ammonia borane for the controlled production of 2D hexagonal boron nitride. Sci Rep 2017; 7:14297. [PMID: 29085080 PMCID: PMC5662770 DOI: 10.1038/s41598-017-14663-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 10/13/2017] [Indexed: 11/09/2022] Open
Abstract
Ammonia borane (AB) is among the most promising precursors for the large-scale synthesis of hexagonal boron nitride (h-BN) by chemical vapour deposition (CVD). Its non-toxic and non-flammable properties make AB particularly attractive for industry. AB decomposition under CVD conditions, however, is complex and hence has hindered tailored h-BN production and its exploitation. To overcome this challenge, we report in-depth decomposition studies of AB under industrially safe growth conditions. In situ mass spectrometry revealed a time and temperature-dependent release of a plethora of NxBy-containing species and, as a result, significant changes of the N:B ratio during h-BN synthesis. Such fluctuations strongly influence the formation and morphology of 2D h-BN. By means of in situ gas monitoring and regulating the precursor temperature over time we achieve uniform release of volatile chemical species over many hours for the first time, paving the way towards the controlled, industrially viable production of h-BN.
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Affiliation(s)
- Vitaliy Babenko
- Department of Materials, University of Oxford, Oxford, OX1 3PH, UK
- Centre for Advanced Photonics and Electronics, University of Cambridge, 9 JJ Thomson Ave, Cambridge, CB3 0FA, UK
| | - George Lane
- Department of Materials, University of Oxford, Oxford, OX1 3PH, UK
- Department of Chemistry, University of Cambridge, Lensfield Rd, Cambridge, CB2 1EW, UK
| | - Antal A Koos
- Department of Materials, University of Oxford, Oxford, OX1 3PH, UK
- Nanostructures Department, Institute of Technical Physics and Materials Science, Centre for Energy Research, PO Box 49, H-1525, Budapest, Hungary
| | - Adrian T Murdock
- Department of Materials, University of Oxford, Oxford, OX1 3PH, UK
- CSIRO Manufacturing, P.O. Box 218, Bradfield Road, Lindfield, New South Wales, 2070, Australia
| | - Karwei So
- Department of Materials, University of Oxford, Oxford, OX1 3PH, UK
| | - Jude Britton
- Department of Materials, University of Oxford, Oxford, OX1 3PH, UK
- Renishaw New Mills, Wotton-under-Edge, Gloucestershire, GL12 8JR, UK
| | | | - Jonathan Moffat
- Oxford Instruments Asylum Research, High Wycombe, HP12 3SE, UK
| | - Nicole Grobert
- Department of Materials, University of Oxford, Oxford, OX1 3PH, UK.
- Williams Advanced Engineering, Grove, Oxfordshire, OX12 0DQ, UK.
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Affiliation(s)
- Derya Öncel Özgür
- Department of Chemical Engineering; Gazi University; 06570 Ankara Turkey
| | - Göksel Özkan
- Department of Chemical Engineering; Gazi University; 06570 Ankara Turkey
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Li Y, Ali MC, Yang Q, Zhang Z, Bao Z, Su B, Xing H, Ren Q. Hybrid Deep Eutectic Solvents with Flexible Hydrogen-Bonded Supramolecular Networks for Highly Efficient Uptake of NH 3. CHEMSUSCHEM 2017; 10:3368-3377. [PMID: 28703458 DOI: 10.1002/cssc.201701135] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Indexed: 06/07/2023]
Abstract
Serious environmental concerns have led to a great demand for efficient uptake of NH3 by solvents. However, traditional aqueous absorbents have many shortcomings and efforts to use ionic liquids have met with limited success. A hybrid deep eutectic solvents (DESs) designed with a flexible hydrogen-bonded supramolecular network exhibits both exceptional NH3 uptake capacity and superior desorption-regeneration performance, along with superb NH3 /CO2 selectivity and environmental merit. Elucidated by molecular dynamic simulations and spectroscopic analysis, the abundant hydrogen-bonding sites in the hybrid DESs bind every atom of the NH3 molecule and enable strong physical reversible solvation, whereas the multiple interactions among the hybrid components create a flexible hydrogen-bonded supramolecular network and allow for solvent-unbreaking absorption to ensure the full participation of the solvent and process stability. A mass solubility of NH3 up to 0.13 g g-1 was achieved at 313 K and 101 kPa by the hybrid DES choline chloride/resorcinol/glycerol (1:3:5), which is higher than all reported ionic liquids and ordinary DESs. Moreover, the performance remained the same after ten absorption-desorption cycles and the DESs could be easily regenerated.
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Affiliation(s)
- Yuhui Li
- Key Laboratory of Biomass Chemical Engineering of, Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Zheda Road 38, Hangzhou, 310027, PR China
| | - Mohammad Chand Ali
- Key Laboratory of Biomass Chemical Engineering of, Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Zheda Road 38, Hangzhou, 310027, PR China
| | - Qiwei Yang
- Key Laboratory of Biomass Chemical Engineering of, Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Zheda Road 38, Hangzhou, 310027, PR China
| | - Zhiguo Zhang
- Key Laboratory of Biomass Chemical Engineering of, Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Zheda Road 38, Hangzhou, 310027, PR China
| | - Zongbi Bao
- Key Laboratory of Biomass Chemical Engineering of, Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Zheda Road 38, Hangzhou, 310027, PR China
| | - Baogen Su
- Key Laboratory of Biomass Chemical Engineering of, Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Zheda Road 38, Hangzhou, 310027, PR China
| | - Huabin Xing
- Key Laboratory of Biomass Chemical Engineering of, Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Zheda Road 38, Hangzhou, 310027, PR China
| | - Qilong Ren
- Key Laboratory of Biomass Chemical Engineering of, Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Zheda Road 38, Hangzhou, 310027, PR China
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