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Ghahremani S, Samadizadeh M, Khaleghian M, Zabarjad Shiraz N. Theoretical study of encapsulation of Floxuridine anticancer drug into BN (9,9-7) nanotube for medical application. PHOSPHORUS SULFUR 2019. [DOI: 10.1080/10426507.2019.1687479] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Sahar Ghahremani
- Department of Chemistry, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Marjaneh Samadizadeh
- Department of Chemistry, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Mehrnoosh Khaleghian
- Department of Chemistry, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran
| | - Nader Zabarjad Shiraz
- Department of Chemistry, Central Tehran Branch, Islamic Azad University, Tehran, Iran
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2
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Lucier BEG, Zhang Y, Lee KJ, Lu Y, Huang Y. Grasping hydrogen adsorption and dynamics in metal-organic frameworks using (2)H solid-state NMR. Chem Commun (Camb) 2016; 52:7541-4. [PMID: 27181834 DOI: 10.1039/c6cc03205b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Record greenhouse gas emissions have spurred the search for clean energy sources such as hydrogen (H2) fuel cells. Metal-organic frameworks (MOFs) are promising H2 adsorption and storage media, but knowledge of H2 dynamics and adsorption strengths in these materials is lacking. Variable-temperature (VT) (2)H solid-state NMR (SSNMR) experiments targeting (2)H2 gas (i.e., D2) shed light on D2 adsorption and dynamics within six representative MOFs: UiO-66, M-MOF-74 (M = Zn, Mg, Ni), and α-M3(COOH)6 (M = Mg, Zn). D2 binding is relatively strong in Mg-MOF-74, Ni-MOF-74, α-Mg3(COOH)6, and α-Zn3(COOH)6, giving rise to broad (2)H SSNMR powder patterns. In contrast, D2 adsorption is weaker in UiO-66 and Zn-MOF-74, as evidenced by the narrow (2)H resonances that correspond to rapid reorientation of the D2 molecules. Employing (2)H SSNMR experiments in this fashion holds great promise for the correlation of MOF structural features and functional groups/metal centers to H2 dynamics and host-guest interactions.
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Affiliation(s)
- Bryan E G Lucier
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada.
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3
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Amiens C, Ciuculescu-Pradines D, Philippot K. Controlled metal nanostructures: Fertile ground for coordination chemists. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.07.013] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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4
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Pike SD, Chadwick FM, Rees NH, Scott MP, Weller AS, Krämer T, Macgregor SA. Solid-state synthesis and characterization of σ-alkane complexes, [Rh(L2)(η(2),η(2)-C7H12)][BAr(F)4] (L2 = bidentate chelating phosphine). J Am Chem Soc 2015; 137:820-33. [PMID: 25506741 DOI: 10.1021/ja510437p] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The use of solid/gas and single-crystal to single-crystal synthetic routes is reported for the synthesis and characterization of a number of σ-alkane complexes: [Rh(R2P(CH2)nPR2)(η(2),η(2)-C7H12)][BAr(F)4]; R = Cy, n = 2; R = (i)Pr, n = 2,3; Ar = 3,5-C6H3(CF3)2. These norbornane adducts are formed by simple hydrogenation of the corresponding norbornadiene precursor in the solid state. For R = Cy (n = 2), the resulting complex is remarkably stable (months at 298 K), allowing for full characterization using single-crystal X-ray diffraction. The solid-state structure shows no disorder, and the structural metrics can be accurately determined, while the (1)H chemical shifts of the Rh···H-C motif can be determined using solid-state NMR spectroscopy. DFT calculations show that the bonding between the metal fragment and the alkane can be best characterized as a three-center, two-electron interaction, of which σCH → Rh donation is the major component. The other alkane complexes exhibit solid-state (31)P NMR data consistent with their formation, but they are now much less persistent at 298 K and ultimately give the corresponding zwitterions in which [BAr(F)4](-) coordinates and NBA is lost. The solid-state structures, as determined by X-ray crystallography, for all these [BAr(F)4](-) adducts are reported. DFT calculations suggest that the molecular zwitterions within these structures are all significantly more stable than their corresponding σ-alkane cations, suggesting that the solid-state motif has a strong influence on their observed relative stabilities.
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Affiliation(s)
- Sebastian D Pike
- Department of Chemistry, Chemistry Research Laboratories, University of Oxford , Mansfield Road, Oxford OX1 3TA, U.K
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5
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Jee B, Hartmann M, Pöppl A. H, D and HD adsorption upon the metal-organic framework [CuZn(btc)] studied by pulsed ENDOR and HYSCORE spectroscopy. Mol Phys 2013. [DOI: 10.1080/00268976.2013.795666] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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6
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Gutmann T, del Rosal I, Chaudret B, Poteau R, Limbach HH, Buntkowsky G. From Molecular Complexes to Complex Metallic Nanostructures-2H Solid-State NMR Studies of Ruthenium-Containing Hydrogenation Catalysts. Chemphyschem 2013; 14:3026-33. [DOI: 10.1002/cphc.201300200] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Indexed: 11/08/2022]
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7
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Gutmann T, Walaszek B, Yeping X, Wächtler M, del Rosal I, Grünberg A, Poteau R, Axet R, Lavigne G, Chaudret B, Limbach HH, Buntkowsky G. Hydrido-Ruthenium Cluster Complexes as Models for Reactive Surface Hydrogen Species of Ruthenium Nanoparticles. Solid-State 2H NMR and Quantum Chemical Calculations. J Am Chem Soc 2010; 132:11759-67. [DOI: 10.1021/ja104229a] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Torsten Gutmann
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Bernadeta Walaszek
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Xu Yeping
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Maria Wächtler
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Iker del Rosal
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Anna Grünberg
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Romuald Poteau
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Rosa Axet
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Guy Lavigne
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Bruno Chaudret
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Hans-Heinrich Limbach
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Gerd Buntkowsky
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
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8
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del Rosal I, Gutmann T, Maron L, Jolibois F, Chaudret B, Walaszek B, Limbach HH, Poteau R, Buntkowsky G. DFT 2H quadrupolar coupling constants of ruthenium complexes: a good probe of the coordination of hydrides in conjuction with experiments. Phys Chem Chem Phys 2009; 11:5657-63. [PMID: 19842483 DOI: 10.1039/b822150b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal (TM) hydrides are of great interest in chemistry because of their reactivity and their potential as catalysts for hydrogenation reactions. 2H solid-state NMR can be used in order to get information about the local environment of hydrogen atoms, and more particularly the coordination mode of hydrides in such complexes. In this work we will show that it is possible to establish at the level of density functional theory (DFT) a viable methodological strategy that allows the determination of 2H NMR parameters, namely the quadrupolar coupling constant (C(Q)) respectively the quadrupolar splitting (deltanuQ) and the asymmetry parameter (etaQ). The reliability of the method (B3PW91-DFT) and basis set effects have been first evaluated for simple organic compounds (benzene and fluorene). A good correlation between experimental and theoretical values is systematically obtained if the large basis set cc-pVTZ is used for the computations. 2H NMR properties of five mononuclear ruthenium complexes (namely Cp*RuD3(PPh3), Tp*RuD(THT)2, Tp*RuD(D2)(THT) and Tp*RuD(D2)2 and RuD2(D2)2(PCy3)2) which exhibit different ligands and hydrides involved in different coordination modes (terminal-H or eta2-H2), have been calculated and compared to previous experimental data. The results obtained are in excellent agreement with experiments. Although 2H NMR spectra are not always easy to analyze, assistance by quantum chemistry calculations allows unambiguous assignment of the signals of such spectra. As far as experiments can be achieved at very low temperatures in order to avoid dynamic effects, this hybrid theoretical/experimental tool may give useful insights in the context of the characterization of ruthenium surfaces or nanoparticles with solid-state NMR.
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Affiliation(s)
- Iker del Rosal
- Université de Toulouse; INSA, UPS; LPCNO, IRSAMC; 135 avenue de Rangueil, F-31077 Toulouse, France
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9
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Macholl S, Matthes J, Limbach HH, Sabo-Etienne S, Chaudret B, Buntkowsky G. High-resolution 2H MAS NMR applied to deuterium analogs of hydrido eta2-dihydrogen complexes. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2009; 36:137-143. [PMID: 19781918 DOI: 10.1016/j.ssnmr.2009.08.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2009] [Revised: 08/03/2009] [Accepted: 08/14/2009] [Indexed: 05/28/2023]
Abstract
(2)H solid-state, variable temperature magic angle spinning (MAS) NMR spectra of precipitated samples of the deutero dideuterium complexes Ru(D)(2)(eta(2)-D(2))(2)(PCy(3))(2) and RuD(eta(2)-D(2))I(PCy(3))(2) [Cy=cyclohexyl] are presented. They show that even at moderate MAS speed, high resolution is achieved at 7 and 14T allowing (2)H chemical shifts and quadrupole couplings to be obtained and assigned to different solid and gaseous (2)H species. These two parameters allow identifying chemically different hydrogen species in the material. The analysis of these parameters in this study reveals the presence of three different species in the sample, namely the complexes RuD(eta(2)-D(2))I(PCy(3))(2) and RuD(eta(2)-D(2))(2)I(PCy(3))(2), and highly mobile HD/D(2). These assignments are supported by (2)H T(1) relaxation times and (31)P MAS NMR spectra. Moreover, variable temperature MAS NMR spectra reveal temperature-dependent line-shape changes, which are clear indications of intramolecular hydrogen exchange of the deutero and the dideuterium ligands and which give an estimate for the activation energy of this process.
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Affiliation(s)
- Sven Macholl
- Freie Universität Berlin, Institut für Chemie und Biochemie, Takustr. 3, 14195 Berlin, Germany.
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10
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Walaszek B, Yeping X, Adamczyk A, Breitzke H, Pelzer K, Limbach HH, Huang J, Li H, Buntkowsky G. 2H-solid-state-NMR study of hydrogen adsorbed on catalytically active ruthenium coated mesoporous silica materials. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2009; 35:164-171. [PMID: 19359146 DOI: 10.1016/j.ssnmr.2009.02.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2009] [Revised: 02/17/2009] [Accepted: 02/26/2009] [Indexed: 05/27/2023]
Abstract
(2)H solid-state NMR measurements were performed on three samples of ruthenium nanoparticles synthesized inside two different kinds of mesoporous silica, namely SBA-3 silica materials and SBA-15 functionalized with -COOH groups and loaded with deuterium gas. The line-shape analyses of the spectra reveal the different deuteron species. In all samples a strong -OD signal is found, which shows the catalytic activity of the metal, which activates the D-D bond and deuterates the -SiOH groups through the gas phase, corroborating their usability as catalysts for hydrogenation reactions. At room temperature the mobility of the -Si-OD groups depends on the sample preparation. In addition to the -Si-OD deuterons, the presence of different types of deuterons bound to the metal is revealed. The singly coordinated -Ru-D species exhibit several different quadrupolar couplings, which indicate the presence of several non-equivalent binding sites with differing binding strength. In addition to the dissociated hydrogen species there is also a dihydrogen species -Ru-D(2), which is attributed to defect sites on the surface. It exhibits a fast rotational dynamics at all temperatures. Finally there are also indications of three-fold coordinated surface deuterons and octahedrally coordinated deuterons inside the metal.
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Affiliation(s)
- Bernadeta Walaszek
- Institut für Physikalische und Theoretische Chemie, Freie Universität Berlin, Berlin, Germany
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11
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Morris RH. Dihydrogen, dihydride and in between: NMR and structural properties of iron group complexes. Coord Chem Rev 2008. [DOI: 10.1016/j.ccr.2008.01.010] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Lopez del Amo JM, Buntkowsky G, Limbach HH, Resa I, Fernandez R, Carmona E. Low-temperature NMR studies of Zn tautomerism and hindered rotations in solid zincocene derivatives. J Phys Chem A 2008; 112:3557-65. [PMID: 18366198 DOI: 10.1021/jp711504g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Using a combination of NMR methods we have detected and studied fluxional motions in the slip-sandwich structure of solid decamethylzincocene (I, [(eta5-C5Me5)Zn(eta1-C5Me5)]). For comparison, we have also studied the solid iminoacyl derivative [(eta5-C5Me5)Zn(eta1-C(NXyl)C5Me5)] (II). The variable temperature 13C CPMAS NMR spectra of I indicate fast rotations of both Cp* rings in the molecule down to 156 K as well as the presence of an order-disorder phase transition around 210 K. The disorder is shown to be dynamic arising from a fast combined Zn tautomerism and eta1/eta5 reorganization of the Cp* rings between two degenerate states A and B related by a molecular inversion. In the ordered phase, the degeneracy of A and B is lifted; that is, the two rings X and Y are inequivalent, where X exhibits a larger fraction of time in the eta5 state than Y. However, the interconversion is still fast and characterized by a reaction enthalpy of DeltaH = 2.4 kJ mol-1 and a reaction entropy of DeltaS = 4.9 J K-1 mol-1. In order to obtain quantitative kinetic information, variable temperature 2H NMR experiments were performed on static samples of I-d6 and II-d6 between 300 and 100 K, where in each ring one CH3 is replaced by one CD3 group. For II-d6, the 2H NMR line shapes indicate fast CD3 group rotations and a fast "eta5 rotation", corresponding to 72 degrees rotational jumps of the eta5 coordinated Cp* ring. The latter motion becomes slow around 130 K. By line shape analysis, an activation energy of the eta5 rotation of about 21 kJ mol-1 was obtained. 2H NMR line shapes analysis of I-d6 indicates fast CD3 group rotations at all temperatures. Moreover, between 100 and 150 K, a transition from the slow to the fast exchange regime is observed for the 5-fold rotational jumps of both Cp* rings, exhibiting an activation energy of 18 kJ mol-1. This value was corroborated by 2H NMR relaxometry from which additionally the activation energies 6.3 kJ mol-1 and 11.2 kJ mol-1 for the CD3 rotation and the molecular inversion process were determined.
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Affiliation(s)
- Juan Miguel Lopez del Amo
- Institut für Chemie und Biochemie der Freien Universität Berlin, Takustrasse 3, D-14195, Berlin, Germany.
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Schröder F, Esken D, Cokoja M, van den Berg MWE, Lebedev OI, Van Tendeloo G, Walaszek B, Buntkowsky G, Limbach HH, Chaudret B, Fischer RA. Ruthenium Nanoparticles inside Porous [Zn4O(bdc)3] by Hydrogenolysis of Adsorbed [Ru(cod)(cot)]: A Solid-State Reference System for Surfactant-Stabilized Ruthenium Colloids. J Am Chem Soc 2008; 130:6119-30. [DOI: 10.1021/ja078231u] [Citation(s) in RCA: 320] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Felicitas Schröder
- Lehrstuhl für Anorganische Chemie II−Organometallics & Materials, and Lehrstuhl für Technische Chemie, Ruhr-Universität, Universitätsstrasse 150, D-44780 Bochum, Germany, EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Institut für Physikalische Chemie, Friedrich-Schiller-Universität, D-07743 Jena, Germany, Physikalische and Theoretische Chemie, Freie Universität, D-11195 Berlin, Germany, and Laboratoire de Chimie de Coordination−CNRS, F-31077 Toulouse Cedex 4, France
| | - Daniel Esken
- Lehrstuhl für Anorganische Chemie II−Organometallics & Materials, and Lehrstuhl für Technische Chemie, Ruhr-Universität, Universitätsstrasse 150, D-44780 Bochum, Germany, EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Institut für Physikalische Chemie, Friedrich-Schiller-Universität, D-07743 Jena, Germany, Physikalische and Theoretische Chemie, Freie Universität, D-11195 Berlin, Germany, and Laboratoire de Chimie de Coordination−CNRS, F-31077 Toulouse Cedex 4, France
| | - Mirza Cokoja
- Lehrstuhl für Anorganische Chemie II−Organometallics & Materials, and Lehrstuhl für Technische Chemie, Ruhr-Universität, Universitätsstrasse 150, D-44780 Bochum, Germany, EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Institut für Physikalische Chemie, Friedrich-Schiller-Universität, D-07743 Jena, Germany, Physikalische and Theoretische Chemie, Freie Universität, D-11195 Berlin, Germany, and Laboratoire de Chimie de Coordination−CNRS, F-31077 Toulouse Cedex 4, France
| | - Maurits W. E. van den Berg
- Lehrstuhl für Anorganische Chemie II−Organometallics & Materials, and Lehrstuhl für Technische Chemie, Ruhr-Universität, Universitätsstrasse 150, D-44780 Bochum, Germany, EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Institut für Physikalische Chemie, Friedrich-Schiller-Universität, D-07743 Jena, Germany, Physikalische and Theoretische Chemie, Freie Universität, D-11195 Berlin, Germany, and Laboratoire de Chimie de Coordination−CNRS, F-31077 Toulouse Cedex 4, France
| | - Oleg I. Lebedev
- Lehrstuhl für Anorganische Chemie II−Organometallics & Materials, and Lehrstuhl für Technische Chemie, Ruhr-Universität, Universitätsstrasse 150, D-44780 Bochum, Germany, EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Institut für Physikalische Chemie, Friedrich-Schiller-Universität, D-07743 Jena, Germany, Physikalische and Theoretische Chemie, Freie Universität, D-11195 Berlin, Germany, and Laboratoire de Chimie de Coordination−CNRS, F-31077 Toulouse Cedex 4, France
| | - Gustaaf Van Tendeloo
- Lehrstuhl für Anorganische Chemie II−Organometallics & Materials, and Lehrstuhl für Technische Chemie, Ruhr-Universität, Universitätsstrasse 150, D-44780 Bochum, Germany, EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Institut für Physikalische Chemie, Friedrich-Schiller-Universität, D-07743 Jena, Germany, Physikalische and Theoretische Chemie, Freie Universität, D-11195 Berlin, Germany, and Laboratoire de Chimie de Coordination−CNRS, F-31077 Toulouse Cedex 4, France
| | - Bernadeta Walaszek
- Lehrstuhl für Anorganische Chemie II−Organometallics & Materials, and Lehrstuhl für Technische Chemie, Ruhr-Universität, Universitätsstrasse 150, D-44780 Bochum, Germany, EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Institut für Physikalische Chemie, Friedrich-Schiller-Universität, D-07743 Jena, Germany, Physikalische and Theoretische Chemie, Freie Universität, D-11195 Berlin, Germany, and Laboratoire de Chimie de Coordination−CNRS, F-31077 Toulouse Cedex 4, France
| | - Gerd Buntkowsky
- Lehrstuhl für Anorganische Chemie II−Organometallics & Materials, and Lehrstuhl für Technische Chemie, Ruhr-Universität, Universitätsstrasse 150, D-44780 Bochum, Germany, EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Institut für Physikalische Chemie, Friedrich-Schiller-Universität, D-07743 Jena, Germany, Physikalische and Theoretische Chemie, Freie Universität, D-11195 Berlin, Germany, and Laboratoire de Chimie de Coordination−CNRS, F-31077 Toulouse Cedex 4, France
| | - Hans-Heinrich Limbach
- Lehrstuhl für Anorganische Chemie II−Organometallics & Materials, and Lehrstuhl für Technische Chemie, Ruhr-Universität, Universitätsstrasse 150, D-44780 Bochum, Germany, EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Institut für Physikalische Chemie, Friedrich-Schiller-Universität, D-07743 Jena, Germany, Physikalische and Theoretische Chemie, Freie Universität, D-11195 Berlin, Germany, and Laboratoire de Chimie de Coordination−CNRS, F-31077 Toulouse Cedex 4, France
| | - Bruno Chaudret
- Lehrstuhl für Anorganische Chemie II−Organometallics & Materials, and Lehrstuhl für Technische Chemie, Ruhr-Universität, Universitätsstrasse 150, D-44780 Bochum, Germany, EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Institut für Physikalische Chemie, Friedrich-Schiller-Universität, D-07743 Jena, Germany, Physikalische and Theoretische Chemie, Freie Universität, D-11195 Berlin, Germany, and Laboratoire de Chimie de Coordination−CNRS, F-31077 Toulouse Cedex 4, France
| | - Roland A. Fischer
- Lehrstuhl für Anorganische Chemie II−Organometallics & Materials, and Lehrstuhl für Technische Chemie, Ruhr-Universität, Universitätsstrasse 150, D-44780 Bochum, Germany, EMAT, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium, Institut für Physikalische Chemie, Friedrich-Schiller-Universität, D-07743 Jena, Germany, Physikalische and Theoretische Chemie, Freie Universität, D-11195 Berlin, Germany, and Laboratoire de Chimie de Coordination−CNRS, F-31077 Toulouse Cedex 4, France
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Adamczyk A, Xu Y, Walaszek B, Roelofs F, Pery T, Pelzer K, Philippot K, Chaudret B, Limbach HH, Breitzke H, Buntkowsky G. Solid State and Gas Phase NMR Studies of Immobilized Catalysts and Catalytic Active Nanoparticles. Top Catal 2008. [DOI: 10.1007/s11244-008-9054-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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del Rosal I, Maron L, Poteau R, Jolibois F. DFT calculations of 1H and 13C NMR chemical shifts in transition metal hydrides. Dalton Trans 2008:3959-70. [DOI: 10.1039/b802190b] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Buntkowsky G, Walaszek B, Adamczyk A, Xu Y, Limbach HH, Chaudret B. Mechanism of nuclear spin initiated para-H2 to ortho-H2 conversion. Phys Chem Chem Phys 2006; 8:1929-35. [PMID: 16633680 DOI: 10.1039/b601594h] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper a quantitative explanation for a diamagnetic ortho/para H2 conversion is given. The description is based on the quantum-mechanical density matrix formalism originally developed by Alexander and Binsch for studies of exchange processes in NMR spectra. Only the nuclear spin system is treated quantum-mechanically. Employing the model of a three spin system, the reactions of the hydrogen gas with the catalysts are treated as a phenomenological rate process, described by a rate constant. Numerical calculations reveal that for nearly all possible geometrical arrangements of the three spin system an efficient spin conversion is obtained. Only in the chemically improbable case of a linear group H-X-H no spin conversion is obtained. The efficiency of the spin conversion depends strongly on the lifetime of the H-X-H complex and on the presence of exchange interactions between the two hydrogens. Even moderate exchange couplings cause a quench of the spin conversion. Thus a sufficiently strong binding of the dihydrogen to the S spin is necessary to render the quenching by the exchange interaction ineffective.
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Affiliation(s)
- G Buntkowsky
- FSU Jena, Institut für Physikalische Chemie, Helmholtzweg 4, 07743, Jena, Germany.
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Pery T, Pelzer K, Buntkowsky G, Philippot K, Limbach HH, Chaudret B. Direct NMR Evidence for the Presence of Mobile Surface Hydrides on Ruthenium Nanoparticles. Chemphyschem 2005; 6:605-7. [PMID: 15881575 DOI: 10.1002/cphc.200400621] [Citation(s) in RCA: 113] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tal Pery
- Institut for Chemie, Freie Universität Berlin, 14195 Berlin (Germany)
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18
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Schmidt T, Schmitt H, Haeberlen U, Olejniczak Z, Lalowicz ZT. ND4+ and NH3D+ dynamics in ammonium persulphate. II. Transition from low-to-high-temperature regime. J Chem Phys 2002. [DOI: 10.1063/1.1518024] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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