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Volatile Iridium and Platinum MOCVD Precursors: Chemistry, Thermal Properties, Materials and Prospects for Their Application in Medicine. COATINGS 2021. [DOI: 10.3390/coatings11010078] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Interest in iridium and platinum has been steadily encouraged due to such unique properties as exceptional chemical inertia and corrosion resistance, high biological compatibility, and mechanical strength, which are the basis for their application in medical practice. Metal-organic chemical vapor deposition (MOCVD) is a promising method to fabricate Ir and Pt nanomaterials, multilayers, and heterostructures. Its advantages include precise control of the material composition and microstructure in deposition processes at relatively low temperatures onto non-planar substrates. The development of MOCVD processes is inextricably linked with the development of the chemistry of volatile precursors, viz., specially designed coordination and organometallic compounds. This review describes the synthesis methods of various iridium and platinum precursors, their thermal properties, and examples of the use of MOCVD, including formation of films for medical application and bimetallics. Although metal acetylacetonates are currently the most widely used precursors, the recently developed heteroligand Ir(I) and Pt(IV) complexes appear to be more promising in both synthetic and thermochemical aspects. Their main advantage is their ability to control thermal properties by modifying several types of ligands, making them tunable to deposit films onto different types of materials and to select a combination of compatible compounds for obtaining the bimetallic materials.
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Babucci M, Hoffman AS, Debefve LM, Kurtoglu SF, Bare SR, Gates BC, Uzun A. Unraveling the individual influences of supports and ionic liquid coatings on the catalytic properties of supported iridium complexes and iridium clusters. J Catal 2020. [DOI: 10.1016/j.jcat.2020.04.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Babucci M, Fang CY, Perez-Aguilar JE, Hoffman AS, Boubnov A, Guan E, Bare SR, Gates BC, Uzun A. Controlling catalytic activity and selectivity for partial hydrogenation by tuning the environment around active sites in iridium complexes bonded to supports. Chem Sci 2019; 10:2623-2632. [PMID: 30996978 PMCID: PMC6419936 DOI: 10.1039/c8sc05287e] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 01/08/2019] [Indexed: 01/31/2023] Open
Abstract
Single-site Ir(CO)2 complexes bonded to high-surface-area metal oxide supports, SiO2, TiO2, Fe2O3, CeO2, MgO, and La2O3, were synthesized by chemisorption of Ir(CO)2(acac) (acac = acetylacetonate) followed by coating with each of the following ionic liquids (ILs): 1-n-butyl-3-methylimidazolium tetrafluoroborate, [BMIM][BF4], 1-n-butyl-3-methylimidazolium acetate, [BMIM][Ac], and 1-(3-cyanopropyl)-3-methylimidazolium dicyanamide, [CPMIM][DCA]. Extended X-ray absorption fine structure spectroscopy showed that site-isolated iridium was bonded to oxygen atoms of the support. Electron densities on the iridium enveloped by each IL sheath/support combination were characterized by carbonyl infrared spectroscopy of the iridium gem-dicarbonyls and by X-ray absorption near-edge structure data. The electron-donor/acceptor tendencies of both the support and IL determine the activity and selectivity of the catalysts for the hydrogenation of 1,3-butadiene, with electron-rich iridium being selective for partial hydrogenation. The results resolve the effects of the IL and support as ligands; for example, the effect of the IL becomes dominant when the support has a weak electron-donor character. The combined effects of supports and ILs as ligands offer broad opportunities for tuning catalytic properties of supported metal catalysts.
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Affiliation(s)
- Melike Babucci
- Department of Chemical and Biological Engineering , Koç University , Rumelifeneri Yolu , Sariyer 34450, Istanbul , Turkey .
- Koç University TÜPRAŞ Energy Center (KUTEM) , Koç University , Rumelifeneri Yolu , Sariyer 34450, Istanbul , Turkey
| | - Chia-Yu Fang
- Department of Materials Science and Engineering , University of California , Davis , California 95616 , USA
| | - Jorge E Perez-Aguilar
- Department of Chemical Engineering , University of California , Davis , California 95616 , USA .
| | - Adam S Hoffman
- SSRL , SLAC National Accelerator Laboratory , Menlo Park , CA 94025 , USA
| | - Alexey Boubnov
- SSRL , SLAC National Accelerator Laboratory , Menlo Park , CA 94025 , USA
| | - Erjia Guan
- Department of Materials Science and Engineering , University of California , Davis , California 95616 , USA
| | - Simon R Bare
- SSRL , SLAC National Accelerator Laboratory , Menlo Park , CA 94025 , USA
| | - Bruce C Gates
- Department of Chemical Engineering , University of California , Davis , California 95616 , USA .
| | - Alper Uzun
- Department of Chemical and Biological Engineering , Koç University , Rumelifeneri Yolu , Sariyer 34450, Istanbul , Turkey .
- Koç University TÜPRAŞ Energy Center (KUTEM) , Koç University , Rumelifeneri Yolu , Sariyer 34450, Istanbul , Turkey
- Koç University Surface Science and Technology Center (KUYTAM) , Koç University , Rumelifeneri Yolu , Sariyer, 34450 Istanbul , Turkey
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Varshavsky Y, Cherkasova T, Galding M, Korlyukov A, Podkorytov I, Gindin V, Smirnov S, Mazur A, Rubaylo A. 13C NMR spectrum of crystalline [Rh(Acac) (CO)2]: A contribution to the discussion on [Rh(Acac) (CO)2] molecular structure in the solid state. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.08.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Kovaleva EA, Kuzubov AA, Vikulova ES, Basova TV, Morozova NB. Mechanism of dicarbonyl(2,4-pentanedionato)iridium(I) decomposition on iron surface and in gas phase: Complex experimental and theoretical study. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.06.059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Vikulova ES, Ilyin IY, Karakovskaya KI, Piryazev DA, Morozova NB. Crystal structure and thermal properties of (1,1,1,5,5,5-hexafluoropentanoato-4)··(dicarbonyl)iridium(I). J STRUCT CHEM+ 2016. [DOI: 10.1134/s0022476615060335] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Yam VWW, Au VKM, Leung SYL. Light-Emitting Self-Assembled Materials Based on d8 and d10 Transition Metal Complexes. Chem Rev 2015; 115:7589-728. [DOI: 10.1021/acs.chemrev.5b00074] [Citation(s) in RCA: 1065] [Impact Index Per Article: 118.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vivian Wing-Wah Yam
- Institute of Molecular Functional
Materials (Areas of Excellence Scheme, University Grants Committee
(Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Vonika Ka-Man Au
- Institute of Molecular Functional
Materials (Areas of Excellence Scheme, University Grants Committee
(Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Sammual Yu-Lut Leung
- Institute of Molecular Functional
Materials (Areas of Excellence Scheme, University Grants Committee
(Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
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Vasilyev VY, Morozova NB, Basova TV, Igumenov IK, Hassan A. Chemical vapour deposition of Ir-based coatings: chemistry, processes and applications. RSC Adv 2015. [DOI: 10.1039/c5ra03566j] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Iridium-based film precursor chemistry, nucleation and growth at CVD/ALD are reviewed with numerical characterization of the growth features in 3D objects.
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Affiliation(s)
- V. Yu. Vasilyev
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of the Russian Academy of Sciences
- Novosibirsk
- Russian Federation
- Novosibirsk State Technical University
| | - N. B. Morozova
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of the Russian Academy of Sciences
- Novosibirsk
- Russian Federation
| | - T. V. Basova
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of the Russian Academy of Sciences
- Novosibirsk
- Russian Federation
- Novosibirsk State University
| | - I. K. Igumenov
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of the Russian Academy of Sciences
- Novosibirsk
- Russian Federation
| | - A. Hassan
- Materials and Engineering Research Institute
- Sheffield Hallam University
- Sheffield S1 1WB
- UK
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