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Wang L, Jiang X, Trabelsi T, Wang G, Francisco JS, Zeng X, Zhou M. Spectroscopic Study of [Mg, H, N, C, O] Species: Implications for the Astrochemical Magnesium Chemistry. J Am Chem Soc 2024; 146:4162-4171. [PMID: 38306246 DOI: 10.1021/jacs.3c13144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2024]
Abstract
Magnesium is an abundant metal element in space, and magnesium chemistry has vital importance in the evolution of interstellar medium (ISM) and circumstellar regions, such as the asymptotic giant branch star IRC+10216 where a variety of Mg compounds bearing H, C, N, and O have been detected and proposed as the important components in the gas-phase molecular clouds and solid-state dust grains. Herein, we report the formation and infrared spectroscopic characterization of the Mg-bearing molecules HMg, [Mg, N, C], [Mg, H, N, C], [Mg, N, C, O], and [Mg, H, N, C, O] from the reactions of Mg/Mg+ and the prebiotic isocyanic acid (HNCO) in the solid neon matrix. Based on their thermal diffusion and photochemical behavior, a complex reactivity landscape involving association, decomposition, and isomerization reactions of these Mg-bearing molecules is developed, which can not only help understand the chemical processes of the magnesium (iso)cyanides in astrochemistry but also provide implications on the presence of magnesium (iso)cyanates in the ISM and the chemical model for the dust grain surface reactions. It also provides a new paradigm of the key intermediate nature of the cationic complexes in the formation of neutral interstellar species.
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Affiliation(s)
- Lina Wang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, China
| | - Xin Jiang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, China
| | - Tarek Trabelsi
- Department of Earth and Environment Science, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6243, United States
| | - Guanjun Wang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, China
| | - Joseph S Francisco
- Department of Earth and Environment Science, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6243, United States
| | - Xiaoqing Zeng
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, China
| | - Mingfei Zhou
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, China
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2
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Mó O, Montero-Campillo MM, Yáñez M, Alkorta I, Elguero J. A Holistic View of the Interactions between Electron-Deficient Systems: Clustering of Beryllium and Magnesium Hydrides and Halides. Molecules 2023; 28:7507. [PMID: 38005228 PMCID: PMC10673300 DOI: 10.3390/molecules28227507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 10/24/2023] [Accepted: 10/27/2023] [Indexed: 11/26/2023] Open
Abstract
In the search for common bonding patterns in pure and mixed clusters of beryllium and magnesium derivatives, the most stable dimers and trimers involving BeX2 and MgX2 (X = H, F, Cl) have been studied in the gas phase using B3LYP and M06-2X DFT methods and the G4 ab initio composite procedure. To obtain some insight into their structure, stability, and bonding characteristics, we have used two different energy decomposition formalisms, namely MBIE and LMO-EDA, in parallel with the analysis of the electron density with the help of QTAIM, ELF, NCIPLOT, and AdNDP approaches. Some interesting differences are already observed in the dimers, where the stability sequence observed for the hydrides differs entirely from that of the fluorides and chlorides. Trimers also show some peculiarities associated with the presence of compact trigonal cyclic structures that compete in stability with the more conventional hexagonal and linear forms. As observed for dimers, the stability of the trimers changes significantly from hydrides to fluorides or chlorides. Although some of these clusters were previously explored in the literature, the novelty of this work is to provide a holistic approach to the entire series of compounds by using chemical bonding tools, allowing us to understand the stability trends in detail and providing insights for a significant number of new, unexplored structures.
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Affiliation(s)
- Otilia Mó
- Departamento de Química, Módulo 13, Facultad de Ciencias, and Institute of Advanced Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain; (O.M.); (M.Y.)
| | - M. Merced Montero-Campillo
- Departamento de Química, Módulo 13, Facultad de Ciencias, and Institute of Advanced Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain; (O.M.); (M.Y.)
| | - Manuel Yáñez
- Departamento de Química, Módulo 13, Facultad de Ciencias, and Institute of Advanced Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain; (O.M.); (M.Y.)
| | - Ibon Alkorta
- Instituto de Química Médica, IQM-CSIC, Juan de la Cierva, 3, 28006 Madrid, Spain;
| | - José Elguero
- Instituto de Química Médica, IQM-CSIC, Juan de la Cierva, 3, 28006 Madrid, Spain;
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3
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An K, Tong W, Wang Y, Qing Y, Sui Y, Xu Y, Ni C. Eco-Friendly Superhydrophobic Coupling Conversion Coating with Corrosion Resistance on Magnesium Alloy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6355-6365. [PMID: 37097762 DOI: 10.1021/acs.langmuir.3c00025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
An eco-friendly superhydrophobic conversion coating is fabricated to enhance the corrosion resistance of the AZ31B Mg alloy by combining the deep eutectic solvent pretreatment and electrodeposition. The coral-like micro-nano structure formed by reacting deep eutectic solvent and Mg alloy provides a structural basis for constructing a superhydrophobic coating. Cerium stearate with low surface energy is deposited on the structure, providing the coating's superhydrophobicity and the corrosion inhibition effect. Electrochemical test results demonstrate that the as-prepared superhydrophobic conversion coating (water contact angle at 154.7°) with a 99.68% protection effect significantly improves anticorrosion properties for the AZ31B Mg alloy. The corrosion current density decreases from 1.79 × 10-4 A·cm-2 of Mg substrate to 5.57 × 10-7 A·cm-2 of the coated sample. Besides, the electrochemical impedance modulus reaches the value of 1.69 × 103 Ω·cm2 and increases approximately 23 times in magnitude compared with the Mg substrate. Furthermore, the corrosion protection mechanism is attributed to the coupling effect of water-repellency barrier protection and corrosion inhibition, resulting in excellent corrosion resistance. Results demonstrate a promising strategy for the corrosion protection of Mg alloys by replacing the chromate conversion coating with the superhydrophobic coupling conversion coating.
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Affiliation(s)
- Kai An
- School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Wei Tong
- Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China
| | - Youqiang Wang
- School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Yongquan Qing
- School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
| | - Yi Sui
- State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou Research Institute of Rare Earths, Baotou 014030, China
| | - Ying Xu
- School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Chenbing Ni
- School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China
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4
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Shin CH, Lee HY, Gyan-Barimah C, Yu JH, Yu JS. Magnesium: properties and rich chemistry for new material synthesis and energy applications. Chem Soc Rev 2023; 52:2145-2192. [PMID: 36799134 DOI: 10.1039/d2cs00810f] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Magnesium (Mg) has many unique properties suitable for applications in the fields of energy conversion and storage. These fields presently rely on noble metals for efficient performance. However, among other challenges, noble metals have low natural abundance, which undermines their sustainability. Mg has a high negative standard reduction potential and a unique crystal structure, and its low melting point at 650 °C makes it a good candidate to replace or supplement numerous other metals in various energy applications. These attractive features are particularly helpful for improving the properties and limits of materials in energy systems. However, knowledge of Mg and its practical uses is still limited, despite recent studies which have reported Mg's key roles in synthesizing new structures and modifying the chemical properties of materials. At present, information about Mg chemistry has been rather scattered without any organized report. The present review highlights the chemistry of Mg and its uses in energy applications such as electrocatalysis, photocatalysis, and secondary batteries, among others. Future perspectives on the development of Mg-based materials are further discussed to identify the challenges that need to be addressed.
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Affiliation(s)
- Cheol-Hwan Shin
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 42988, Republic of Korea.
| | - Ha-Young Lee
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 42988, Republic of Korea.
| | - Caleb Gyan-Barimah
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 42988, Republic of Korea.
| | - Jeong-Hoon Yu
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 42988, Republic of Korea.
| | - Jong-Sung Yu
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 42988, Republic of Korea.
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5
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Insights of hydrogen adsorption and dissociation on Ni doped Mg4 clusters: A DFT study. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Jędrzkiewicz D, Mai J, Langer J, Mathe Z, Patel N, DeBeer S, Harder S. Access to a Labile Monomeric Magnesium Radical by Ball-Milling. Angew Chem Int Ed Engl 2022; 61:e202200511. [PMID: 35108440 PMCID: PMC9306460 DOI: 10.1002/anie.202200511] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Indexed: 12/13/2022]
Abstract
In order to isolate a monometallic Mg radical, the precursor (Am)MgI⋅(CAAC) (1) was prepared (Am=tBuC(N-DIPP)2 , DIPP=2,6-diisopropylphenyl, CAAC=cyclic (alkyl)(amino)carbene). Reduction of a solution of 1 in toluene with the reducing agent K/KI led to formation of a deep purple complex that rapidly decomposed. Ball-milling of 1 with K/KI gave the low-valent MgI complex (Am)Mg⋅(CAAC) (2) which after rapid extraction with pentane and crystallization was isolated in 15 % yield. Although a benzene solution of 2 decomposes rapidly to give Mg(Am)2 (3) and unidentified products, the radical is stable in the solid state. Its crystal structure shows planar trigonal coordination at Mg. The extremely short Mg-C distance of 2.056(2) Å indicates strong Mg-CAAC bonding. Calculations and EPR measurements show that most of the spin density is in a π* orbital located at the C-N bond in CAAC, leading to significant C-N bond elongation. This is supported by calculated NPA charges in 2: Mg +1.73, CAAC -0.82. Similar metal-to-CAAC charge transfer was calculated for M0 (CAAC)2 and [MI (CAAC)2 + ] (M=Be, Mg, Ca) complexes in which the metal charges range from +1.50 to +1.70. Although the spin density of the radical is mainly located at the CAAC ligand, complex 2 reacts as a low-valent MgI complex: reaction with a I2 solution in toluene gave (Am)MgI⋅(CAAC) (1) as the major product.
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Affiliation(s)
- Dawid Jędrzkiewicz
- Inorganic and Organometallic ChemistryUniversität Erlangen-NürnbergEgerlandstrasse 191058ErlangenGermany
| | - Jonathan Mai
- Inorganic and Organometallic ChemistryUniversität Erlangen-NürnbergEgerlandstrasse 191058ErlangenGermany
| | - Jens Langer
- Inorganic and Organometallic ChemistryUniversität Erlangen-NürnbergEgerlandstrasse 191058ErlangenGermany
| | - Zachary Mathe
- Max Planck Institute for Chemical Energy ConversionStiftstr. 34–3645472Mülheim an der RuhrGermany
| | - Neha Patel
- Inorganic and Organometallic ChemistryUniversität Erlangen-NürnbergEgerlandstrasse 191058ErlangenGermany
| | - Serena DeBeer
- Max Planck Institute for Chemical Energy ConversionStiftstr. 34–3645472Mülheim an der RuhrGermany
| | - Sjoerd Harder
- Inorganic and Organometallic ChemistryUniversität Erlangen-NürnbergEgerlandstrasse 191058ErlangenGermany
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7
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Jędrzkiewicz D, Mai J, Langer J, Mathe Z, Patel N, DeBeer S, Harder S. Access to a Labile Monomeric Magnesium Radical by Ball‐Milling. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dawid Jędrzkiewicz
- Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Jonathan Mai
- Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Jens Langer
- Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Zachary Mathe
- Max Planck Institute for Chemical Energy Conversion Stiftstr. 34–36 45472 Mülheim an der Ruhr Germany
| | - Neha Patel
- Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
| | - Serena DeBeer
- Max Planck Institute for Chemical Energy Conversion Stiftstr. 34–36 45472 Mülheim an der Ruhr Germany
| | - Sjoerd Harder
- Inorganic and Organometallic Chemistry Universität Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
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8
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Maltsev AP, Charkin OP. Theoretical Modeling of Exo- and Endohedral Hydrogenation Reactions of the Doped Magnesium Cluster Mg17Ni. RUSS J INORG CHEM+ 2021. [DOI: 10.1134/s0036023621120111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Liu HY, Schwamm RJ, Neale SE, Hill MS, McMullin CL, Mahon MF. Reductive Dimerization of CO by a Na/Mg(I) Diamide. J Am Chem Soc 2021; 143:17851-17856. [PMID: 34652134 PMCID: PMC8554760 DOI: 10.1021/jacs.1c09467] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Indexed: 12/30/2022]
Abstract
Sodium reduction of [{SiNDipp}Mg] [{SiNDipp} = {CH2SiMe2N(Dipp)}2; Dipp = 2,6-i-Pr2C6H3] provides the Mg(I) species, [{SiNDipp}MgNa]2, in which the long Mg-Mg bond (>3.2 Å) is augmented by persistent Na-aryl interactions. Computational assessment indicates that this molecule is best considered to comprise a contiguous tetrametallic core, a viewpoint borne out by its reaction with CO, which results in ethynediolate formation mediated by the dissimilar metal centers.
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Affiliation(s)
- Han-Ying Liu
- Department
of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K.
| | - Ryan J. Schwamm
- Department
of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K.
| | - Samuel E. Neale
- Department
of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K.
| | - Michael S. Hill
- Department
of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K.
| | - Claire L. McMullin
- Department
of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K.
| | - Mary F. Mahon
- Department
of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K.
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10
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Affiliation(s)
- Jinjing Pan
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Li Zhang
- Center of Materials Science and Engineering, Guangxi University of Science and Technology, Liuzhou 545006, People’s Republic of China
| | - Yuhao He
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Qian Yu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Gengwen Tan
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
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11
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Charkin OP, Maltsev AP. Density Functional Theory Modeling of Reactions of Addition of H 2 Molecules to Magnesium Clusters Mg 17M Doped with Atoms M of Transition 3d Elements. J Phys Chem A 2021; 125:2308-2315. [PMID: 33720723 DOI: 10.1021/acs.jpca.1c00211] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Density functional theory calculations of potential energy surface (PES) have been performed for elementary hydrogenation reactions Mg17M + H2 → Mg17MH2 of magnesium clusters Mg17M doped by transition 3d metals (M = Ti-Ni), and for consecutive reactions Mg17Ni + nH2 → Mg17NiH2n of addition of n hydrogen molecules to Ni-doped clusters Mg17Ni and Mg17NiH2. Energetic, geometric, and spectroscopic features of intermediates and transition states along the minimum energy pathway have been found, and their trends were analyzed with dopants changing along the 3d series and with increasing number of atoms H attached to the surface positions of the magnesium backbone.
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Affiliation(s)
- Oleg P Charkin
- Institute of Problems of Chemical Physics, Russian Academy of Science, Chernogolovka, Moscow Region 142432, Russia
| | - Alexey P Maltsev
- Lomonosov Moscow State University, Leninskie Gory 1, Moscow 111991, Russia
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12
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Andrews L, Cho H. Cyanides and Isocyanides of Zinc, Cadmium and Mercury: Matrix Infrared Spectra and Electronic Structure Calculations for the Linear MNC, NCMCN, CNMNC, NCMMCN, and CNMMNC Molecules. Chemphyschem 2020; 22:204-220. [DOI: 10.1002/cphc.202000193] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 07/03/2020] [Indexed: 11/06/2022]
Affiliation(s)
- Lester Andrews
- Department of Chemistry University of Virginia Charlottesville Virginia 22904 USA
| | - Han‐Gook Cho
- Department of Chemistry Incheon National University 119 Academy-ro Yeonsu-gu, Incheon 22012 South Korea
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13
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Maltsev AP, Charkin OP. Theoretical Modeling of Addition Reactions of an H2 Molecule to Mg17L Magnesium Clusters Doped with 3d Metals. RUSS J INORG CHEM+ 2020. [DOI: 10.1134/s0036023620080100] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Narendrapurapu BS, Bowman MC, Xie Y, Schaefer HF, Tkachenko NV, Boldyrev AI, Li G. Dibridged, Monobridged, Vinylidene-Like, and Linear Structures for the Alkaline Earth Dihydrides Be 2H 2, Mg 2H 2, Ca 2H 2, Sr 2H 2, and Ba 2H 2. Proposals for Observations. Inorg Chem 2020; 59:10404-10408. [PMID: 32674579 DOI: 10.1021/acs.inorgchem.0c01651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This research reports a search for peculiar monobridged structures of the E2H2 molecules (E = Be, Mg, Ca, Sr, Ba). For Be2H2 and Mg2H2, the monobridged geometry is not an equilibrium but rather a transition state between the vinylidene-like structure and the global minimum HE-EH linear geometry. However, for Ca2H2, Sr2H2, and Ba2H2, this situation changes significantly; the linear structure is no longer the global minimum but lies higher in energy than two other equilibria, the dibridged and monobridged structures. The planar dibridged structures of both Sr2H2 and Ba2H2 should be observable via IR spectroscopy. Although the remarkable monobridged structures lie 8.3 (Sr) and 7.6 kcal/mol (Ba) higher, the large IR intensities of the terminal E-H stretching frequencies may make the monobridged structures observable. The monobridged structures have sizable permanent dipole moments (3.07 and 3.06 D for Sr and Ba, respectively) and also should be observable via microwave spectroscopy.
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Affiliation(s)
- Beulah S Narendrapurapu
- Department of Chemistry, Georgia Southern University, Statesboro, Georgia 30460, United States
| | - Michael C Bowman
- Department of Chemistry, Taylor University, Upland, Indiana 46989, United States
| | - Yaoming Xie
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Henry F Schaefer
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Nikolay V Tkachenko
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322, United States
| | - Alexander I Boldyrev
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322, United States
| | - Guoliang Li
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education; Center for Computational Quantum Chemistry, School of Chemistry, South China Normal University, Guangzhou 510006, P. R. China
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Karst J, Sterl F, Linnenbank H, Weiss T, Hentschel M, Giessen H. Watching in situ the hydrogen diffusion dynamics in magnesium on the nanoscale. SCIENCE ADVANCES 2020; 6:eaaz0566. [PMID: 32494706 PMCID: PMC7210000 DOI: 10.1126/sciadv.aaz0566] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 02/25/2020] [Indexed: 06/11/2023]
Abstract
Active plasmonic and nanophotonic systems require switchable materials with extreme material contrast, short switching times, and negligible degradation. On the quest for these supreme properties, an in-depth understanding of the nanoscopic processes is essential. Here, we unravel the nanoscopic details of the phase transition dynamics of metallic magnesium (Mg) to dielectric magnesium hydride (MgH2) using free-standing films for in situ nanoimaging. A characteristic MgH2 phonon resonance is used to achieve unprecedented chemical specificity between the material states. Our results reveal that the hydride phase nucleates at grain boundaries, from where the hydrogenation progresses into the adjoining nanocrystallites. We measure a much faster nanoscopic hydride phase propagation in comparison to the macroscopic propagation dynamics. Our innovative method offers an engineering strategy to overcome the hitherto limited diffusion coefficients and has substantial impact on the further design, development, and analysis of switchable phase transition as well as hydrogen storage and generation materials.
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Maltsev AP, Charkin OP. Theoretical Modeling of Stepwise Addition of H2 Molecules to Magnesium Clusters Mg18 and Mg17Ni. RUSS J INORG CHEM+ 2020. [DOI: 10.1134/s0036023620020114] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Covalent Surface Functionalization of Bovine Serum Albumin to Magnesium Surface to Provide Robust Corrosion Inhibition and Enhance In Vitro Osteo-Inductivity. Polymers (Basel) 2020; 12:polym12020439. [PMID: 32069827 PMCID: PMC7077681 DOI: 10.3390/polym12020439] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 02/06/2020] [Accepted: 02/10/2020] [Indexed: 02/07/2023] Open
Abstract
Herein, we describe precisely a covalent modification of pure magnesium (Mg) surface and its application to induce in vitro osteogenic differentiation. The new concept of a chemical bonding method is proposed for developing stable chemical bonds on the Mg surface through the serial assembly of bioactive additives that include ascorbic acid (AA) and bovine serum albumin (BSA). We studied both the physicochemical and electrochemical properties using scanning electron microscopy and other techniques to confirm how the covalent bonding of BSA on Mg can, after coating, significantly enhance the chemical stability of the substrate. The modified Mg-OH-AA-BSA exhibits better anti-corrosion behavior with high corrosion potential (Ecorr = -0.96 V) and low corrosion current density (Icorr = 0.2 µA cm-2) as compared to the pure Mg (Ecorr = -1.46 V, Icorr = 10.42 µA cm-2). The outer layer of BSA on Mg protects the fast degradation rate of Mg, which is the consequence of the strong chemicals bonds between amine groups on BSA with carboxylic groups on AA as the possible mechanism of peptide bonds. Collectively, the results suggest that the surface-modified Mg provides a strong bio-interface, and enhances the proliferation and differentiation of pre-osteoblast (MC3T3-E1) cells through a protein-lipid interaction. We therefore conclude that the technique we describe provides a cost-effective and scalable way to generate chemically stable Mg surface that inherits a biological advantage in orthopedic and dental implants in clinical applications.
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Saha R, Das P, Chattaraj PK. A Complex Containing Four Magnesium Atoms and Two Mg–Mg Bonds Behaving as an Electride. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900813] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ranajit Saha
- Department of Chemistry and Center for Theoretical Studies Indian Institute of Technology Kharagpur 721302 Kharagpur India
| | - Prasenjit Das
- Department of Chemistry and Center for Theoretical Studies Indian Institute of Technology Kharagpur 721302 Kharagpur India
| | - Pratim Kumar Chattaraj
- Department of Chemistry and Center for Theoretical Studies Indian Institute of Technology Kharagpur 721302 Kharagpur India
- Department of Chemistry Indian Institute of Technology Bombay 400076 Mumbai India
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19
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Bowman MC, Douberly GE, Schaefer HF. Convergent energies and anharmonic vibrational spectra of Ca 2H 2 and Ca 2H 4 constitutional isomers. Phys Chem Chem Phys 2019; 21:10914-10922. [PMID: 31086933 DOI: 10.1039/c9cp01643k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three constitutional isomers of both Ca2H2 and Ca2H4 have been characterized with molecular electronic structure theory. Correlation methods as complete as CCSDT(Q) and basis sets as large as cc-pwCV5Z have been used to converge the relative energies within chemical accuracy (≤1 kcal mol-1). Anharmonic vibrational frequencies were computed using second-order vibrational perturbation theory employing CCSD(T)/cc-pwCVTZ cubic and quartic force-fields and a CCSD(T)/cc-pwCVQZ quadratic force field. The monobridged [Ca(μ2-H)CaH] and dibridged [Ca(μ2-H)2Ca] isomers of Ca2H2 were predicted to lie 6.5 and 12.9 kcal mol-1 below the energy of the classical HCaCaH linear isomer, respectively. Despite the energetic favorability of the bridged Ca2H2 isomers, we conclude (surprisingly) that only the higher energy linear structure has been observed in the laboratory. At 0 K, the tribridged [Ca(μ2-H)3CaH] isomer of Ca2H4 is predicted to be enthalpically favored by 0.9 kcal mol-1 in comparison to the enthalpy of the dibridged [HCa(μ2-H)2CaH] structure. Comparison of experiment with our computed frequencies suggests that the observed vibrational features arise from both the dibridged and the tribridged Ca2H4 structures.
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Affiliation(s)
- Michael C Bowman
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia.
| | - Gary E Douberly
- Department of Chemistry, University of Georgia, Athens, Georgia
| | - Henry F Schaefer
- Center for Computational Quantum Chemistry, University of Georgia, Athens, Georgia.
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20
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Saha R, Chattaraj PK. Activation of Small Molecules (H 2, CO 2, N 2O, CH 4, and C 6H 6) by a Porphyrinoid-Based Dimagnesium(I) Complex, an Electride. ACS OMEGA 2018; 3:17199-17211. [PMID: 31458339 PMCID: PMC6643606 DOI: 10.1021/acsomega.8b03006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 11/30/2018] [Indexed: 06/10/2023]
Abstract
A density functional theory-based computation has been carried out to reveal the geometrical and electronic structures of Mg2EP (1), where EP is an extended (3.1.3.1) porphyrinoid system. EP is a 22 π electronic system and is aromatic in nature. Here, we have studied the thermodynamic and kinetic stabilities of EP2--supported Mg2 2+ ion. The nature of bonding has been studied using natural bond orbital and atoms in molecule schemes. The presence of a covalent Mg(I)-Mg(I) σ-bond in Mg2EP is confirmed. The occurrence of a non-nuclear attractor (NNA) with large electron population, negative Laplacian of electron density at NNA, and presence of an electron localization function basin along with large nonlinear optical properties prompt us to classify Mg2EP as the first porphyrinoid-based organic electride. Further five small molecules, viz., dihydrogen (H2), carbon dioxide (CO2), nitrous oxide (N2O), methane (CH4), and benzene (C6H6), are found to be activated by the electron density between the two Mg atoms in Mg2EP.
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Affiliation(s)
- Ranajit Saha
- Department
of Chemistry and Center for Theoretical Studies, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Pratim K. Chattaraj
- Department
of Chemistry and Center for Theoretical Studies, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
- Department
of Chemistry, Indian Institute of Technology
Bombay, Mumbai 400076, India
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21
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Peloso R, Resa I, Rodríguez A, Carmona E, Freitag K, Jones C, Stasch A, Boutland AJ, Lips F. COMPOUNDS WITH Zn-Zn AND Mg-Mg BONDS. INORGANIC SYNTHESES 2018. [DOI: 10.1002/9781119477822.ch3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Affiliation(s)
| | | | | | - Ernesto Carmona
- Departamento de Química Inorgánica-Instituto de Investigaciones Químicas; Universidad de Sevilla-Consejo Superior de Investigaciones Científicas; Sevilla 41092 Spain
| | - Kerstin Freitag
- Faculty of Chemistry and Biochemistry; Ruhr-Universität Bochum; Bochum 44801 Germany
| | - Cameron Jones
- School of Chemistry; Monash University; Clayton VIC 3800 Australia
| | - Andreas Stasch
- School of Chemistry; Monash University; Clayton VIC 3800 Australia
| | | | - Felicitas Lips
- Institute for Inorganic and Analytical Chemistry; University of Münster; Münster 48149 Germany
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22
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Palmer CZ, Fortenberry RC. Rovibrational Considerations for the Monomers and Dimers of Magnesium Hydride and Magnesium Fluoride. J Phys Chem A 2018; 122:7079-7088. [DOI: 10.1021/acs.jpca.8b06611] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C. Zachary Palmer
- Department of Chemistry & Biochemistry, Georgia Southern University, Statesboro, Georgia 30460, United States
| | - Ryan C. Fortenberry
- Department of Chemistry & Biochemistry, Georgia Southern University, Statesboro, Georgia 30460, United States
- Department of Chemistry & Biochemistry, University of Mississippi, University, Mississippi 38677, United States
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23
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Hydrides, alkalides, and halides of calcium metal chain: electronic structure and NLO property. Struct Chem 2018. [DOI: 10.1007/s11224-017-1069-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Mukherjee D, Okuda J. Molecular Magnesium Hydrides. Angew Chem Int Ed Engl 2017; 57:1458-1473. [DOI: 10.1002/anie.201708592] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Debabrata Mukherjee
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
| | - Jun Okuda
- Institute of Inorganic Chemistry; RWTH Aachen University; Landoltweg 1 52056 Aachen Germany
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25
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Affiliation(s)
- Debabrata Mukherjee
- Institut für Anorganische Chemie; RWTH Aachen; Landoltweg 1 52056 Aachen Deutschland
| | - Jun Okuda
- Institut für Anorganische Chemie; RWTH Aachen; Landoltweg 1 52056 Aachen Deutschland
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26
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Berski S, Durlak P. Dimeric nature of N-coordinated Mg and Ca ions in metaloorganic compounds. The topological analysis of ELF functions for Mg–Mg and Ca–Ca bonds. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.03.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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27
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Xiao X, Liu Z, Saremi-Yarahmadi S, Gregory DH. Facile preparation of β-/γ-MgH₂ nanocomposites under mild conditions and pathways to rapid dehydrogenation. Phys Chem Chem Phys 2016; 18:10492-8. [PMID: 27030171 DOI: 10.1039/c5cp07762a] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A magnesium hydride composite with enhanced hydrogen desorption kinetics can be synthesized via a simple wet chemical route by ball milling MgH2 with LiCl as an additive at room temperature followed by tetrahydrofuran (THF) treatment under an Ar atmosphere. The as-synthesized composite comprises ca. 18 mass% orthorhombic γ-MgH2 and 80 mass% tetragonal β-MgH2 as submicron-sized particles. The β-/γ-MgH2 nanocomposite exhibits a dehydrogenation capacity of 6.6 wt% and starts to release hydrogen at ∼260 °C; ca. 140 °C lower than that of commercial MgH2. The apparent activation energy for dehydrogenation is 115 ± 3 kJ mol(-1), which is ca. 46% lower than that of commercial MgH2. Analysis suggests that the meta-stable γ-MgH2 component either directly dehydrogenates exothermically or first transforms into stable β-MgH2 very close to the dehydrogenation onset. The improved hydrogen release performance can be attributed both to the existence of the MgH2 nanostructure and to the presence of γ-MgH2.
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Affiliation(s)
- Xuezhang Xiao
- WestCHEM, School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow G12 8QQ Scotland, UK.
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28
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Banerjee P, Nandi PK. Electronic structures and second hyperpolarizabilities of alkaline earth metal complexes end-capped with NA2 (A = H, Li, Na). Phys Chem Chem Phys 2016; 18:12505-20. [DOI: 10.1039/c5cp07661g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The ground state structures and NLO properties of a number of alkaline earth metal complexes end-capped with NA2 groups (A = H, Li, Na) are calculated by employing the CAM-B3LYP, wB97XD and B2PLYP functionals along with MP2 and CCSD(T) for 6-311++G(d,p), 6-311++G(3df,3pd), aug-cc-pVTZ, aug-pc-2 and Hypol basis sets.
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Affiliation(s)
- Paramita Banerjee
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Prasanta K. Nandi
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
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29
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Liu X, Xing X, Zhao J, Wang X. Reactions of Mg and Mg2 with SO2 in Low-Temperature Matrices: Association or Insertion? J Phys Chem A 2015; 119:610-9. [DOI: 10.1021/jp5104998] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xing Liu
- Department
of Chemistry,
and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Xiaopeng Xing
- Department
of Chemistry,
and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Jie Zhao
- Department
of Chemistry,
and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Xuefeng Wang
- Department
of Chemistry,
and Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
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30
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Arrowsmith M, Maitland B, Kociok-Köhn G, Stasch A, Jones C, Hill MS. Mononuclear Three-Coordinate Magnesium Complexes of a Highly Sterically Encumbered β-Diketiminate Ligand. Inorg Chem 2014; 53:10543-52. [DOI: 10.1021/ic501638v] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Merle Arrowsmith
- Department
of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom
| | - Brant Maitland
- School of Chemistry, PO Box 23, Monash University, Melbourne, Victoria 3800, Australia
| | - Gabriele Kociok-Köhn
- Department
of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom
| | - Andreas Stasch
- School of Chemistry, PO Box 23, Monash University, Melbourne, Victoria 3800, Australia
| | - Cameron Jones
- School of Chemistry, PO Box 23, Monash University, Melbourne, Victoria 3800, Australia
| | - Michael S. Hill
- Department
of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom
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31
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Wang Q, Wang X. Infrared spectra of NgBeS (Ng = Ne, Ar, Kr, Xe) and BeS2 in noble-gas matrices. J Phys Chem A 2013; 117:1508-13. [PMID: 23327099 DOI: 10.1021/jp311901a] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Laser-ablated beryllium atom has been codeposited at 4 K with hydrogen sulfide in excess noble gas matrices. Four noble-gas compounds NgBeS (Ng = Ne, Ar, Kr, Xe) and the BeS(2) molecule are identified on the basis of the S-34 isotopic substitution, DFT and CCSD(T) theoretical predictions, and a comparison of noble-gas substitution. The agreement between the experimental and calculated vibrational frequencies supports the identification of these molecules. The dissociation energies are calculated at 1.6, 12.6, 10.7, and 13.4 kcal/mol for NeBeS, ArBeS, KrBeS, and XeBeS, respectively, at the CCSD(T) level. The BeS Lewis acid molecule favors strong chemical binding between the Be and Ng atoms.
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Affiliation(s)
- Qiang Wang
- Department of Chemistry, Tongji University, Shanghai 200092, China
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32
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Jones C, Stasch A. Stable Molecular Magnesium(I) Dimers: A Fundamentally Appealing Yet Synthetically Versatile Compound Class. TOP ORGANOMETAL CHEM 2013. [DOI: 10.1007/978-3-642-36270-5_3] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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33
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34
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35
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Brites V, Guitou M, Léonard C. Mg2H2: new insight on the Mg-Mg bonding and spectroscopic study. J Chem Phys 2011; 134:054314. [PMID: 21303127 DOI: 10.1063/1.3533962] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The six dimensional potential energy surface of the electronic ground state X̃(1)Σ(g)(+) of Mg(2)H(2) has been generated by the coupled-cluster approach with single, double and perturbative triple excitations [CCSD(T)] combined with the aug-cc-pCVTZ basis set for Mg atoms and the aug-cc-pVTZ basis set for the H atoms. The analytical representation of this surface was used in variational calculations of the rovibrational energies of Mg(2)H(2), Mg(2)D(2), and HMg(2)D for J = 0 and 1. For Mg(2)H(2), the rotational constant B(0) is computed to be 0.1438 cm(-1), and the fundamental anharmonic wavenumbers are calculated to be ν(1) = 1527.3 cm(-1) (Σ(g)(+)), ν(2) = 275.3 cm(-1) (Σ(g)(+)), ν(3) = 1503.6 cm(-1) (Σ(u)(+)), ν(4) = 312.9 cm(-1) (Π(g)), and ν(5) = 256.5 cm(-1) (Π(u)). In addition, the electronic ground states of Mg(2)H, MgH(2), Mg(2), and MgH have been investigated in order to compute the bonding energies of Mg(2)H(2) and to explain the strength of the Mg-Mg bond in this tetra-atomic molecule. The nature of the low-lying excited states of Mg(2)H(2) is also studied.
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Affiliation(s)
- V Brites
- Laboratoire Modélisation et Simulation Multi Echelle, Université Paris-Est, MSME UMR 8208 CNRS, 5 bd Descartes, 77454 Marne-la-Vallée, France.
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36
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Deledda S, Hauback BC. Hydride formation in Mg-based systems processed by reactive milling. Faraday Discuss 2011; 151:315-26; discussion 385-97. [DOI: 10.1039/c1fd00023c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Stasch A, Jones C. Stable dimeric magnesium(i) compounds: from chemical landmarks to versatile reagents. Dalton Trans 2011; 40:5659-72. [DOI: 10.1039/c0dt01831g] [Citation(s) in RCA: 174] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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38
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Prascher BP, Woon DE, Peterson KA, Dunning TH, Wilson AK. Gaussian basis sets for use in correlated molecular calculations. VII. Valence, core-valence, and scalar relativistic basis sets for Li, Be, Na, and Mg. Theor Chem Acc 2010. [DOI: 10.1007/s00214-010-0764-0] [Citation(s) in RCA: 375] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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39
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Schulz S. Low-Valent Organometallics-Synthesis, Reactivity, and Potential Applications. Chemistry 2010; 16:6416-28. [DOI: 10.1002/chem.201000580] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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40
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Krieck S, Yu L, Reiher M, Westerhausen M. Subvalent Organometallic Compounds of the Alkaline Earth Metals in Low Oxidation States. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.200900966] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sven Krieck
- Institut für Anorganische und Analytische Chemie, Friedrich‐Schiller‐Universität Jena, August‐Bebel‐Str. 2, 07743 Jena, Germany, Fax: +49‐3641‐948102,
| | - Lian Yu
- Laboratorium für Physikalische Chemie, ETH Zurich Hönggerberg Campus, Wolfgang‐Pauli‐Str. 10, 8093 Zurich, Switzerland
| | - Markus Reiher
- Laboratorium für Physikalische Chemie, ETH Zurich Hönggerberg Campus, Wolfgang‐Pauli‐Str. 10, 8093 Zurich, Switzerland
| | - Matthias Westerhausen
- Institut für Anorganische und Analytische Chemie, Friedrich‐Schiller‐Universität Jena, August‐Bebel‐Str. 2, 07743 Jena, Germany, Fax: +49‐3641‐948102,
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41
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Effect of Magnesium Hydride on the Corrosion Behavior of Pure Magnesium in 0.1 M NaCl Solution. INTERNATIONAL JOURNAL OF CORROSION 2010. [DOI: 10.1155/2010/934867] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The effect of magnesium hydride on the corrosion behavior of pure magnesium in 0.1 M NaCl solution was investigated using the gas collection method, potentiostatic current decay test, and in situ Raman spectrum. The formation of magnesium hydride (MgH2,Mg2H4) was observed at the cathodic region. Applying anodic potential leads to decomposition of magnesium hydride. Magnesium hydride plays an important role on the negative difference effect (NDE) in both the cathodic and anodic regions.
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42
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Bonyhady S, Jones C, Nembenna S, Stasch A, Edwards A, McIntyre G. β-Diketiminate-Stabilized Magnesium(I) Dimers and Magnesium(II) Hydride Complexes: Synthesis, Characterization, Adduct Formation, and Reactivity Studies. Chemistry 2009; 16:938-55. [DOI: 10.1002/chem.200902425] [Citation(s) in RCA: 325] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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43
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Gong L, Wu X, Qi C, Li W, Xiong J, Guo W. Structures and stabilities of P5Mg n P5 (n = 1–3) compounds containing P5 ligands. Theoretical investigation. Mol Phys 2009. [DOI: 10.1080/00268970902744367] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Liangfa Gong
- a College of Chemical Engineering , Beijing Institute of Petro-Chemical Technology , Beijing 102617, China
| | - Xinmin Wu
- a College of Chemical Engineering , Beijing Institute of Petro-Chemical Technology , Beijing 102617, China
| | - Chuansong Qi
- a College of Chemical Engineering , Beijing Institute of Petro-Chemical Technology , Beijing 102617, China
| | - Wei Li
- a College of Chemical Engineering , Beijing Institute of Petro-Chemical Technology , Beijing 102617, China
| | - Jieming Xiong
- a College of Chemical Engineering , Beijing Institute of Petro-Chemical Technology , Beijing 102617, China
| | - Wenli Guo
- a College of Chemical Engineering , Beijing Institute of Petro-Chemical Technology , Beijing 102617, China
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44
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Alkorta I, Provasi PF, Aucar GA, Elguero J. A computational study of 2J(HH)(gem) indirect spin-spin coupling constants in simple hydrides of the second and third periods. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2008; 46:356-361. [PMID: 18273860 DOI: 10.1002/mrc.2181] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Several theoretical methods have been used to compute (2)J(HH) in neutral, anionic and cationic HXH hydrides, X being the 14 nuclei from Li to Cl (28 molecules). Since the calculations also provide (1)J(XH) spin-spin coupling constants (SSCC), these have also been analyzed. The best results were obtained using Second-order polarization propagator approximation (SOPPA)/sadJ. The geminal coupling constants appear to be dependent on the electronegativity of the X-atom.
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Affiliation(s)
- Ibon Alkorta
- Instituto de Química Médica, CSIC, Juan de la Cierva, 3, E-28006 Madrid, Spain.
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45
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46
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Dinda R, Ciobanu O, Wadepohl H, Hübner O, Acharyya R, Himmel HJ. Synthesis and Structural Characterization of a Stable Dimeric Boron(II) Dication. Angew Chem Int Ed Engl 2007; 46:9110-3. [DOI: 10.1002/anie.200703616] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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47
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Dinda R, Ciobanu O, Wadepohl H, Hübner O, Acharyya R, Himmel HJ. Synthese und strukturelle Charakterisierung eines stabilen dimeren Bor(II)-Dikations. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200703616] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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48
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Wang X, Andrews L. Infrared Spectra and Theoretical Calculations of Lithium Hydride Clusters in Solid Hydrogen, Neon, and Argon. J Phys Chem A 2007; 111:6008-19. [PMID: 17547379 DOI: 10.1021/jp071251y] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A matrix isolation IR study of laser-ablated lithium atom reactions with H2 has been performed in solid para-hydrogen, normal hydrogen, neon, and argon. The LiH molecule and (LiH)(2,3,4) clusters were identified by IR spectra with isotopic substitution (HD, D(2), and H(2) + D(2)) and comparison to frequencies calculated by density functional theory and the MP2 method. The LiH diatomic molecule is highly polarized and associates additional H(2) to form primary (H(2))(2)LiH chemical complexes surrounded by a physical cage of solid hydrogen where the ortho and para spin states form three different primary complexes and play a role in the identification of the bis-dihydrogen complex and in characterization of the matrix cage. The highly ionic rhombic (LiH)(2) dimer, which is trapped in solid matrices, is calculated to be 22 kcal/mol more stable than the inverse hydrogen bonded linear LiH-LiH dimer, which is not observed here. The cyclic lithium hydride trimer and tetramer clusters were also observed. Although the spontaneous reaction of 2 Li and H(2) to form (LiH)(2) occurs on annealing in solid H(2), the formation of higher clusters requires visible irradiation. We observed the simplest possible chemical reduction of dihydrogen using two lithium valence electrons to form the rhombic (LiH)(2) dimer.
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Affiliation(s)
- Xuefeng Wang
- Department of Chemistry, P.O. Box 400319, University of Virginia, Charlottesville, Virginia 22904-4319, USA
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49
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Li W, Li C, Ma H, Chen J. Magnesium nanowires: enhanced kinetics for hydrogen absorption and desorption. J Am Chem Soc 2007; 129:6710-1. [PMID: 17488082 DOI: 10.1021/ja071323z] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Weiyang Li
- Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, People's Republic of China
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50
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Wang X, Andrews L. The Activation of Hydrogen by Li Atoms To Form [(LiH)2]. Angew Chem Int Ed Engl 2007; 46:2602-6. [PMID: 17330899 DOI: 10.1002/anie.200605211] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xuefeng Wang
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904-4319, USA.
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