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Merschel A, Vishnevskiy YV, Neumann B, Stammler HG, Ghadwal RS. Highly Soluble Cyclic Organoalanes Based on Anionic Dicarbenes. Chemistry 2023; 29:e202301037. [PMID: 37293882 DOI: 10.1002/chem.202301037] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/16/2023] [Accepted: 06/09/2023] [Indexed: 06/10/2023]
Abstract
Cyclic organoalane compounds [(ADCAr )AlH2 ]2 (ADCAr = ArC{(DippN)C}2 ; Dipp = 2,6-iPr2 C6 H3 ; Ar = Ph or 4-PhC6 H4 (Bp)) based on anionic dicarbene (ADC) frameworks have been reported as crystalline solids. Treatments of Li(ADCAr ) with LiAlH4 at room temperature afford [(ADCAr )AlH2 ]2 with the concomitant release of LiH. Compounds [(ADCAr )AlH2 ]2 are stable crystalline solids and are freely soluble in common organic solvents. They are annulated tricyclic compounds with an almost planar central C4 Al2 -core embedded between two peripheral 1,3-imidazole (C3 N2 ) rings. At room temperature, [(ADCPh )AlH2 ]2 readily reacts with CO2 to form two- and four-fold hydroalumination products [(ADCPh )AlH(OCHO)]2 and [(ADCPh )Al(OCHO)2 ]2 , respectively. Further hydroalumination reactivity of [(ADCPh )AlH2 ]2 has been shown with isocyanate (RNCO) and isothiocyanate (RNCS) species (R=alkyl or aryl group). All compounds have been characterized by NMR spectroscopy, mass spectrometry, and single-crystal X-ray diffraction.
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Affiliation(s)
- Arne Merschel
- Molecular Inorganic Chemistry and Catalysis, Center for Molecular Materials, Faculty of Chemistry, Universität Bielefeld, Universitätsstraße 25, 33615, Bielefeld, Germany
| | - Yury V Vishnevskiy
- Molecular Inorganic Chemistry and Catalysis, Center for Molecular Materials, Faculty of Chemistry, Universität Bielefeld, Universitätsstraße 25, 33615, Bielefeld, Germany
| | - Beate Neumann
- Molecular Inorganic Chemistry and Catalysis, Center for Molecular Materials, Faculty of Chemistry, Universität Bielefeld, Universitätsstraße 25, 33615, Bielefeld, Germany
| | - Hans-Georg Stammler
- Molecular Inorganic Chemistry and Catalysis, Center for Molecular Materials, Faculty of Chemistry, Universität Bielefeld, Universitätsstraße 25, 33615, Bielefeld, Germany
| | - Rajendra S Ghadwal
- Molecular Inorganic Chemistry and Catalysis, Center for Molecular Materials, Faculty of Chemistry, Universität Bielefeld, Universitätsstraße 25, 33615, Bielefeld, Germany
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2
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Anders M, Schwarzer A, Brendler E, Pollex R, Schumann E, Sandig-Predzymirska L, Kaiser S, Mertens F. Bis-(triphenylphosphane) Aluminum Hydride: A Simple Way to Provide, Store, and Use Non-Polymerized Alane for Synthesis. Chempluschem 2021; 86:1193-1198. [PMID: 34437776 DOI: 10.1002/cplu.202100287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 08/07/2021] [Indexed: 11/11/2022]
Abstract
AlH3 (PPh3 )2 was synthesized as a stable solid being the first known 1 : 2 alane arylphosphane adduct. Although only weakly intra-molecularly coordinated, it displays as a molecular crystal significant inertness against atmospheric humidity and oxygen due to strong steric screening of the alane unit. The compound readily dissociates PPh3 in solution allowing for its use as a Lewis acidic reducing agent. These features lead to an easy to store, easy to use reducing agent that may enable the quantitative investigation of aluminum hydride chemistry including reduction, complexation and hydroalumination reactions. The structure contains two non-equivalent penta-coordinated aluminum centers that despite long Al-P distances of ca. 2.7 Å display unusually high quadrupolar coupling constants CQ of 25.1 and 26.5 in 27 Al solid state NMR measurements. The product was also tested as a reducing agent on a small set of selected compounds with various functional groups.
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Affiliation(s)
- Martin Anders
- Department of Physical Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Anke Schwarzer
- Department of Organic Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Erica Brendler
- Department of Analytical Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Rolf Pollex
- Department of Organic Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Erik Schumann
- Department of Physical Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Lesia Sandig-Predzymirska
- Department of Physical Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Stefan Kaiser
- Department of Physical Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
| | - Florian Mertens
- Department of Physical Chemistry, Technische Universität Bergakademie Freiberg, Leipziger Str. 29, 09599, Freiberg, Germany
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Stennett CR, Wagner CL, Fettinger JC, Vasko P, Power PP. Reductions of M{N(SiMe 3) 2} 3 (M = V, Cr, Fe): Terminal and Bridging Low-Valent First-Row Transition Metal Hydrido Complexes and "Metallo-Transamination". Inorg Chem 2021; 60:11401-11411. [PMID: 34250810 DOI: 10.1021/acs.inorgchem.1c01399] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction of the vanadium(III) tris(silylamide) V{N(SiMe3)2}3 with LiAlH4 in diethyl ether gives the highly unstable mixed-metal polyhydride [V(μ2-H)6[Al{N(SiMe3)2}2]3][Li(OEt2)3] (1), which was structurally characterized. Alternatively, performing the same reaction in the presence of 12-crown-4 affords a rare example of a structurally verified vanadium terminal hydride complex, [VH{N(SiMe3)2}3][Li(12-crown-4)2] (2). The corresponding deuteride 2D was also prepared using LiAlD4. In contrast, no hydride complexes were isolated by reaction of M{N(SiMe3)2}3 (M = Cr, Fe) with LiAlH4 and 12-crown-4. Instead, these reactions afforded the anionic metal(II) complexes [M{N(SiMe3)2}3][Li(12-crown-4)2] (3, M = Cr; 4, M = Fe). The reaction of the iron(III) tris(silylamide) Fe{N(SiMe3)2}3 with lithium aluminum hydride without a crown ether gives the "hydrido inverse crown" complex [Fe(μ2-H){N(SiMe3)2}2(μ2-Li)]2 (5), while treatment of the same trisamide with alane trimethylamine complex gives the iron(II) polyhydride complex Fe(μ2-H)6[Al{N(SiMe3)2}2]2[Al{N(SiMe3)2}(NMe3)] (6). Complexes 2-6 were characterized by X-ray crystallography, as well as by infrared, electronic, and 1H and 13C (complex 6) NMR spectroscopies. Complexes 1 and 6 are apparently formed by an unusual "metallo-transamination" process.
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Affiliation(s)
- Cary R Stennett
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Clifton L Wagner
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - James C Fettinger
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Petra Vasko
- Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, FI-40014, Jyväskylä, Finland
| | - Philip P Power
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
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Renard D, Tian S, Lou M, Neumann O, Yang J, Bayles A, Solti D, Nordlander P, Halas NJ. UV-Resonant Al Nanocrystals: Synthesis, Silica Coating, and Broadband Photothermal Response. NANO LETTERS 2021; 21:536-542. [PMID: 33270458 DOI: 10.1021/acs.nanolett.0c04020] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The field of plasmonics has largely been inspired by the properties of Au and Ag nanoparticles, leading to applications in sensing, photocatalysis, nanomedicine, and solar water treatment. Recently the quest for new plasmonic materials has focused on earth-abundant elements, where aluminum is a sustainable, low-cost potential alternative. Here we report the chemical synthesis of sub-50 nm diameter Al nanocrystals with a plasmon-resonant absorption in the UV region of the spectrum. We observe a transition from a UV-resonant response, that is, a colorless solution, to a broadband absorptive response, that is, a completely black solution, as the nanocrystal concentration is increased. The strong absorptive interband transition in Al provides the dominant mechanism responsible for this effect. We developed a robust method to functionalize Al nanocrystals with silica to increase their stability in H2O from hours to weeks enabling us to observe efficient broadband photothermal heating with these nanoparticles.
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Affiliation(s)
- David Renard
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Laboratory for Nanophotonics, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Shu Tian
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Laboratory for Nanophotonics, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Minhan Lou
- Laboratory for Nanophotonics, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Oara Neumann
- Laboratory for Nanophotonics, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Jian Yang
- Laboratory for Nanophotonics, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Department of Physics and Astronomy, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Aaron Bayles
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Laboratory for Nanophotonics, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - David Solti
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Laboratory for Nanophotonics, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Peter Nordlander
- Laboratory for Nanophotonics, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Department of Physics and Astronomy, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Naomi J Halas
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Laboratory for Nanophotonics, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- Department of Physics and Astronomy, Rice University, 6100 Main Street, Houston, Texas 77005, United States
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Sandig-Predzymirska L, Ortmeyer J, Wagler J, Brendler E, Habermann F, Anders M, Felderhoff M, Mertens F. The direct and reversible hydrogenation of activated aluminium supported by piperidine. Dalton Trans 2020; 49:17689-17698. [PMID: 33232434 DOI: 10.1039/d0dt03175e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The reversible hydrogenation of aminoalanes employing activated aluminium and piperidine has been explored. A selection of transition metal (TM) compounds have been investigated as additives for producing TM-activated aluminium (TM = Ti, Zr, Hf and Y). The effect of these additives on the activation of aluminium with respect to hydrogenation of an aluminium/piperidinoalane system has been studied. It has been shown that Ti, Zr and Hf can efficiently promote the activation of aluminium for its hydrogenation. The experiments performed showed that the TM activity for the piperidinoalane formation decreases in the order Zr > Hf > Ti > Y. Using multinuclear NMR spectroscopy, the reversibility of this piperidinoalane-based hydrogenation system has been evidenced, demonstrating a potential pathway for hydrogen storage in aminoalanes. The syntheses of piperidinoalanes as well as their structural and spectroscopic characterisation are described. Single-crystal X-ray diffraction analyses of [pip2AlH]2 and [pip3Al]2 (pip = 1-piperidinyl, C5H10N) revealed dimers containing a central [AlN]2 unit.
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Affiliation(s)
- Lesia Sandig-Predzymirska
- TU Bergakademie Freiberg, Fakultät für Chemie und Physik, Institut für Physikalische Chemie, Leipziger Str. 29, 09599 Freiberg, Germany.
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Douglas S, Knapp CE. Low-Temperature Deposition of Highly Conductive Aluminum Metal Films on Flexible Substrates Using Liquid Alane MOD Precursors. ACS APPLIED MATERIALS & INTERFACES 2020; 12:26193-26199. [PMID: 32419460 PMCID: PMC7303966 DOI: 10.1021/acsami.0c05429] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 05/18/2020] [Indexed: 06/11/2023]
Abstract
Metal-organic decomposition (MOD) precursor inks are emerging as the new route to low-temperature deposition of highly conductive metals, owing to the tunability of their decomposition. New methods of printing are being investigated to help negate the progressive issues of the electronics industry, not least the movement toward low-cost polymers and paper substrates. Informed precursor design is crucial if achieving materials capable of this is possible. In this work, the liquid MOD precursors, dimethylethylamine alane (DMEAA) and trimethylamine alane (TEAA), have been used to deposit a highly conductive aluminum (Al) metal with resistivities in the range of 4.10 × 10-5 to 5.32 × 10-7 Ω m (mean electrical resistivity of 8 × 10-6 Ω m, approximately 300 times more resistive than bulk Al metal), without the need for an additional solvent, at low temperatures (100 and 120 °C), on a range of substrates including glass, polyimide, polyethylene terephthalate, and paper. Conductive coatings have been analyzed using X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy and resistivity measurements; as a proof of concept, Al deposited on paper has been used in an electrical circuit. Results indicate that DMEAA is a better precursor, producing more conductive films, which is explained by its lower decomposition temperature and higher Al weight loading, indicating potential for significant industrial application.
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Affiliation(s)
- Samuel
P. Douglas
- Department of Chemistry, University
College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Caroline E. Knapp
- Department of Chemistry, University
College London, 20 Gordon Street, London WC1H 0AJ, U.K.
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Ortmeyer J, Bodach A, Sandig‐Predzymirska L, Zibrowius B, Mertens F, Felderhoff M. Direct Hydrogenation of Aluminum via Stabilization with Triethylenediamine: A Mechanochemical Approach to Synthesize the Triethylenediamine ⋅ AlH
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Adduct. Chemphyschem 2019; 20:1360-1368. [DOI: 10.1002/cphc.201801093] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 01/17/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Jochen Ortmeyer
- Max-Planck-Institut für KohlenforschungDepartment of Heterogeneous Catalysis Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr, Germany
| | - Alexander Bodach
- Max-Planck-Institut für KohlenforschungDepartment of Heterogeneous Catalysis Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr, Germany
| | - Lesia Sandig‐Predzymirska
- TU Bergakademie FreibergFakultät für Chemie und Physik, Institut für Physikalische Chemie Leipziger Str. 29 09599 Freiberg Germany
| | - Bodo Zibrowius
- Max-Planck-Institut für KohlenforschungDepartment of Heterogeneous Catalysis Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr, Germany
| | - Florian Mertens
- TU Bergakademie FreibergFakultät für Chemie und Physik, Institut für Physikalische Chemie Leipziger Str. 29 09599 Freiberg Germany
| | - Michael Felderhoff
- Max-Planck-Institut für KohlenforschungDepartment of Heterogeneous Catalysis Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr, Germany
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10
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Humphries TD, Munroe KT, Decken A, McGrady GS. Lewis base complexes of AlH3: structural determination of monomeric and polymeric adducts by X-ray crystallography and DFT calculations. Dalton Trans 2013; 42:6953-64. [DOI: 10.1039/c3dt00046j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Terry D Humphries
- Department of Chemistry, University of New Brunswick, P.O. Box 4400, Fredericton, NB E3B 5A3, Canada.
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