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De Crisci A, Gieleciak R, Mobarok MH, Ali M, Ngo TD, Goswami K, Khan A, Chen J. Producing Asphaltene Fibres from Bitumen Derived Asphaltenes for Carbon Fibre Development: Part One ‐ Electrospinning. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Antonio De Crisci
- Natural Resources Canada, CanmetENERGY, One Oil Patch Drive, Devon AB Canada
| | - Rafal Gieleciak
- Natural Resources Canada, CanmetENERGY, One Oil Patch Drive, Devon AB Canada
| | - Md Hosnay Mobarok
- Natural Resources Canada, CanmetENERGY, One Oil Patch Drive, Devon AB Canada
| | - Mohamed Ali
- Natural Resources Canada, CanmetENERGY, One Oil Patch Drive, Devon AB Canada
| | - Tri Dung Ngo
- InnoTech Alberta, Alberta Innovates, 250 Karl Clark Road Edmonton AB Canada
| | - Keyur Goswami
- InnoTech Alberta, Alberta Innovates, 250 Karl Clark Road Edmonton AB Canada
| | - Ataullah Khan
- InnoTech Alberta, Alberta Innovates, 250 Karl Clark Road Edmonton AB Canada
| | - Jinwen Chen
- Natural Resources Canada, CanmetENERGY, One Oil Patch Drive, Devon AB Canada
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Cao B, He X, Sorge JB, Lalany A, Ahadi K, Afshar A, Olsen BC, Hauger TC, Mobarok MH, Li P, Cadien KC, Brett MJ, Luber EJ, Buriak JM. Understanding the Effects of a High Surface Area Nanostructured Indium Tin Oxide Electrode on Organic Solar Cell Performance. ACS Appl Mater Interfaces 2017; 9:38706-38715. [PMID: 29022714 DOI: 10.1021/acsami.7b10610] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Organic solar cells (OSCs) are a complex assembly of disparate materials, each with a precise function within the device. Typically, the electrodes are flat, and the device is fabricated through a layering approach of the interfacial layers and photoactive materials. This work explores the integration of high surface area transparent electrodes to investigate the possible role(s) a three-dimensional electrode could take within an OSC, with a BHJ composed of a donor-acceptor combination with a high degree of electron and hole mobility mismatch. Nanotree indium tin oxide (ITO) electrodes were prepared via glancing angle deposition, structures that were previously demonstrated to be single-crystalline. A thin layer of zinc oxide was deposited on the ITO nanotrees via atomic layer deposition, followed by a self-assembled monolayer of C60-based molecules that was bound to the zinc oxide surface through a carboxylic acid group. Infiltration of these functionalized ITO nanotrees with the photoactive layer, the bulk heterojunction comprising PC71BM and a high hole mobility low band gap polymer (PDPPTT-T-TT), led to families of devices that were analyzed for the effect of nanotree height. When the height was varied from 0 to 50, 75, 100, and 120 nm, statistically significant differences in device performance were noted with the maximum device efficiencies observed with a nanotree height of 75 nm. From analysis of these results, it was found that the intrinsic mobility mismatch between the donor and acceptor phases could be compensated for when the electron collection length was reduced relative to the hole collection length, resulting in more balanced charge extraction and reduced recombination, leading to improved efficiencies. However, as the ITO nanotrees increased in height and branching, the decrease in electron collection length was offset by an increase in hole collection length and potential deleterious electric field redistribution effects, resulting in decreased efficiency.
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Affiliation(s)
- Bing Cao
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, AB T6G 2G2, Canada
- National Institute for Nanotechnology, National Research Council Canada , 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
| | - Xiaoming He
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, AB T6G 2G2, Canada
| | - Jason B Sorge
- Department of Electrical and Computer Engineering, University of Alberta , Edmonton, Alberta T6G 2 V4, Canada
| | - Abeed Lalany
- Department of Electrical and Computer Engineering, University of Alberta , Edmonton, Alberta T6G 2 V4, Canada
| | - Kaveh Ahadi
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, Alberta T6G 1H9, Canada
| | - Amir Afshar
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, Alberta T6G 1H9, Canada
| | - Brian C Olsen
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, AB T6G 2G2, Canada
- National Institute for Nanotechnology, National Research Council Canada , 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
| | - Tate C Hauger
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, AB T6G 2G2, Canada
- National Institute for Nanotechnology, National Research Council Canada , 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
| | - Md Hosnay Mobarok
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, AB T6G 2G2, Canada
| | - Peng Li
- nanoFAB Centre, University of Alberta , Edmonton, Alberta T6G 2 V4, Canada
| | - Kenneth C Cadien
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, Alberta T6G 1H9, Canada
| | - Michael J Brett
- Department of Electrical and Computer Engineering, University of Alberta , Edmonton, Alberta T6G 2 V4, Canada
| | - Erik J Luber
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, AB T6G 2G2, Canada
- National Institute for Nanotechnology, National Research Council Canada , 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
| | - Jillian M Buriak
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, AB T6G 2G2, Canada
- National Institute for Nanotechnology, National Research Council Canada , 11421 Saskatchewan Drive, Edmonton, AB T6G 2M9, Canada
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Islam MA, Mobarok MH, Sinelnikov R, Purkait TK, Veinot JGC. Phosphorus Pentachloride Initiated Functionalization of Silicon Nanocrystals. Langmuir 2017; 33:8766-8773. [PMID: 28581767 DOI: 10.1021/acs.langmuir.7b00518] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Phosphorus pentachloride (PCl5) has long been used to chlorinate hydrocarbons. It has also been applied in silicon surface chemistry to facilitate alkylation via a two-step halogenation/Grignard route. Here we report a study of the reaction of PCl5 with hydride-terminated silicon nanocrystals (H-SiNCs). An examination of the reaction mechanism has allowed us to establish a functionalization protocol that uses PCl5 as a surface radical initiator to introduce alkyl and alkenyl moieties to the surface of H-SiNCs. The reaction proceeds quickly in a single step, at room temperature and the functionalized silicon nanocrystals retained their morphology and crystallinity. The resulting materials exhibited size-dependent photoluminescence that was approximately 3× as bright as that observed for thermally hydrosilylated SiNCs. Furthermore, the absolute PL quantum yield (AQY) was more than double. The high AQY is expected to enable SiNCs to compete with chalcogenide-based quantum dots in various applications.
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Affiliation(s)
- Muhammad Amirul Islam
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
| | - Md Hosnay Mobarok
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
| | - Regina Sinelnikov
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
| | - Tapas K Purkait
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
| | - Jonathan G C Veinot
- Department of Chemistry, University of Alberta , 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
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Mobarok MH, Purkait TK, Islam MA, Miskolzie M, Veinot JGC. Instantaneous Functionalization of Chemically Etched Silicon Nanocrystal Surfaces. Angew Chem Int Ed Engl 2016; 56:6073-6077. [DOI: 10.1002/anie.201609651] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Md Hosnay Mobarok
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Tapas K. Purkait
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Muhammad Amirul Islam
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Mark Miskolzie
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Jonathan G. C. Veinot
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
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Mobarok MH, Purkait TK, Islam MA, Miskolzie M, Veinot JGC. Instantaneous Functionalization of Chemically Etched Silicon Nanocrystal Surfaces. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609651] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Md Hosnay Mobarok
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Tapas K. Purkait
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Muhammad Amirul Islam
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Mark Miskolzie
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Jonathan G. C. Veinot
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
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Purkait TK, Iqbal M, Islam MA, Mobarok MH, Gonzalez CM, Hadidi L, Veinot JGC. Alkoxy-Terminated Si Surfaces: A New Reactive Platform for the Functionalization and Derivatization of Silicon Quantum Dots. J Am Chem Soc 2016; 138:7114-20. [DOI: 10.1021/jacs.6b03155] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Tapas K. Purkait
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Muhammad Iqbal
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | | | - Md Hosnay Mobarok
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | | | - Lida Hadidi
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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Islam MA, Purkait TK, Mobarok MH, Hoehlein IMD, Sinelnikov R, Iqbal M, Azulay D, Balberg I, Millo O, Rieger B, Veinot JGC. Grafting Poly(3-hexylthiophene) from Silicon Nanocrystal Surfaces: Synthesis and Properties of a Functional Hybrid Material with Direct Interfacial Contact. Angew Chem Int Ed Engl 2016; 55:7393-7. [DOI: 10.1002/anie.201601341] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Indexed: 01/15/2023]
Affiliation(s)
- Muhammad Amirul Islam
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Tapas K. Purkait
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Md Hosnay Mobarok
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Ignaz M. D. Hoehlein
- Wacker-Lehrstuhl für Makromolekulare Chemie; Technische Universität München; Lichtenbergstrasse 4 85747 Garching Germany
| | - Regina Sinelnikov
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Muhammad Iqbal
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Doron Azulay
- Racah Institute of Physics; The Hebrew University of Jerusalem; Jerusalem 91904 Israel
| | - Isaac Balberg
- Racah Institute of Physics; The Hebrew University of Jerusalem; Jerusalem 91904 Israel
| | - Oded Millo
- Racah Institute of Physics; The Hebrew University of Jerusalem; Jerusalem 91904 Israel
| | - Bernhard Rieger
- Wacker-Lehrstuhl für Makromolekulare Chemie; Technische Universität München; Lichtenbergstrasse 4 85747 Garching Germany
| | - Jonathan G. C. Veinot
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
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Islam MA, Purkait TK, Mobarok MH, Hoehlein IMD, Sinelnikov R, Iqbal M, Azulay D, Balberg I, Millo O, Rieger B, Veinot JGC. Grafting Poly(3-hexylthiophene) from Silicon Nanocrystal Surfaces: Synthesis and Properties of a Functional Hybrid Material with Direct Interfacial Contact. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601341] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Muhammad Amirul Islam
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Tapas K. Purkait
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Md Hosnay Mobarok
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Ignaz M. D. Hoehlein
- Wacker-Lehrstuhl für Makromolekulare Chemie; Technische Universität München; Lichtenbergstrasse 4 85747 Garching Germany
| | - Regina Sinelnikov
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Muhammad Iqbal
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
| | - Doron Azulay
- Racah Institute of Physics; The Hebrew University of Jerusalem; Jerusalem 91904 Israel
| | - Isaac Balberg
- Racah Institute of Physics; The Hebrew University of Jerusalem; Jerusalem 91904 Israel
| | - Oded Millo
- Racah Institute of Physics; The Hebrew University of Jerusalem; Jerusalem 91904 Israel
| | - Bernhard Rieger
- Wacker-Lehrstuhl für Makromolekulare Chemie; Technische Universität München; Lichtenbergstrasse 4 85747 Garching Germany
| | - Jonathan G. C. Veinot
- Department of Chemistry; University of Alberta; 11227 Saskatchewan Drive Edmonton Alberta T6G 2G2 Canada
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Luber EJ, Mobarok MH, Buriak JM. Solution-processed zinc phosphide (α-Zn3P2) colloidal semiconducting nanocrystals for thin film photovoltaic applications. ACS Nano 2013; 7:8136-8146. [PMID: 23952612 DOI: 10.1021/nn4034234] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Zinc phosphide (Zn3P2) is a promising earth-abundant material for thin film photovoltaic applications, due to strong optical absorption and near ideal band gap. In this work, crystalline zinc phosphide nanoparticles are synthesized using dimethylzinc and tri-n-octylphosphine as precursors. Transmission electron microscopy and X-ray diffraction data show that these nanoparticles have an average diameter of ∼8 nm and adopt the crystalline structure of tetragonal α-Zn3P2. The optical band gap is found to increase by 0.5 eV relative to bulk Zn3P2, while there is an asymmetric shift in the conduction and valence band levels. Utilizing layer-by-layer deposition of Zn3P2 nanoparticle films, heterojunction devices consisting of ITO/ZnO/Zn3P2/MoO3/Ag are fabricated and tested for photovoltaic performance. The devices are found to exhibit excellent rectification behavior (rectification ratio of 600) and strong photosensitivity (on/off ratio of ∼10(2)). X-ray photoelectron spectroscopy and ultraviolet photoemission spectroscopy analyses reveal the presence of a thin 1.5 nm phosphorus shell passivating the surface of the Zn3P2 nanoparticles. This shell is believed to form during the nanoparticle synthesis.
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Affiliation(s)
- Erik J Luber
- National Institute for Nanotechnology (NINT), National Research Counci l, 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, Canada
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Mobarok MH, McDonald R, Ferguson MJ, Cowie M. Mixed Bis(μ-silylene) and (μ-Silylene)/(μ-Germylene) Complexes Involving the Rh/Ir Metal Combination: Nature of the Si···Si Interactions in the Bis(μ-silylene) Species. Inorg Chem 2012; 51:9249-58. [DOI: 10.1021/ic300720y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Md Hosnay Mobarok
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, T6G 2G2 Canada
| | - Robert McDonald
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, T6G 2G2 Canada
| | - Michael J. Ferguson
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, T6G 2G2 Canada
| | - Martin Cowie
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, T6G 2G2 Canada
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Mobarok MH, Ferguson MJ, Cowie M. Multiple Si–H Bond Activations in a Bis(diethylphosphino)methane-Bridged Complex of Rhodium and Iridium: Synthesis of an Unusual Bis(silyl)/μ-Silylene Complex. Organometallics 2012. [DOI: 10.1021/om300283k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Md Hosnay Mobarok
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Michael J. Ferguson
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Martin Cowie
- Department
of Chemistry and ‡X-ray Crystallography Laboratory, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
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Mobarok MH, McDonald R, Ferguson MJ, Cowie M. Germyl- and Germylene-Bridged Complexes of Rh/Ir and Subsequent Chemistry of a Bridging Germylene Group. Inorg Chem 2012; 51:4020-34. [DOI: 10.1021/ic2021269] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Md Hosnay Mobarok
- Department of Chemistry and ‡X-ray Crystallography
Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Robert McDonald
- Department of Chemistry and ‡X-ray Crystallography
Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Michael J. Ferguson
- Department of Chemistry and ‡X-ray Crystallography
Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
| | - Martin Cowie
- Department of Chemistry and ‡X-ray Crystallography
Laboratory, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2
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Mobarok MH, Oke O, Ferguson MJ, McDonald R, Cowie M. Multiple Silicon−Hydrogen Bond Activations at Adjacent Rhodium and Iridium Centers. Inorg Chem 2010; 49:11556-72. [DOI: 10.1021/ic1017196] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Md Hosnay Mobarok
- Department of Chemistry, University of Alberta, Edmonton, AB, Canada, T6G 2G2
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