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Gabriel C, Perikli M, Raptopoulou CP, Terzis A, Psycharis V, Mateescu C, Jakusch T, Kiss T, Bertmer M, Salifoglou A. pH-Specific Hydrothermal Assembly of Binary and Ternary Pb(II)-(O,N-Carboxylic Acid) Metal Organic Framework Compounds: Correlation of Aqueous Solution Speciation with Variable Dimensionality Solid-State Lattice Architecture and Spectroscopic Signatures. Inorg Chem 2012; 51:9282-96. [DOI: 10.1021/ic300850g] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- C. Gabriel
- Department of Chemical Engineering, Laboratory
of Inorganic Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - M. Perikli
- Department of Chemical Engineering, Laboratory
of Inorganic Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - C. P. Raptopoulou
- Institute of Materials Science, NCSR “Demokritos”, Aghia Paraskevi 15310, Attiki, Greece
| | - A. Terzis
- Institute of Materials Science, NCSR “Demokritos”, Aghia Paraskevi 15310, Attiki, Greece
| | - V. Psycharis
- Institute of Materials Science, NCSR “Demokritos”, Aghia Paraskevi 15310, Attiki, Greece
| | - C. Mateescu
- Banat’s University of Agricultural Sciences and Veterinary Medicine, Timisoara 300645,
Romania
| | - T. Jakusch
- Biocoordination
Chemistry Research Group of the Hungarian Academy of Sciences, Department
of Inorganic and Analytical Chemistry, University of Szeged, Szeged H-6720, Hungary
| | - T. Kiss
- Biocoordination
Chemistry Research Group of the Hungarian Academy of Sciences, Department
of Inorganic and Analytical Chemistry, University of Szeged, Szeged H-6720, Hungary
| | - M. Bertmer
- Institut für Experimentelle Physik II, Universität Leipzig, Leipzig 04103, Germany
| | - A. Salifoglou
- Department of Chemical Engineering, Laboratory
of Inorganic Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
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Gabriel C, Kioseoglou E, Venetis J, Psycharis V, Raptopoulou CP, Terzis A, Voyiatzis G, Bertmer M, Mateescu C, Salifoglou A. pH-Specific Structural Speciation of the Ternary V(V)–Peroxido–Betaine System: A Chemical Reactivity-Structure Correlation. Inorg Chem 2012; 51:6056-69. [DOI: 10.1021/ic2025878] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C. Gabriel
- Laboratory of Inorganic Chemistry, Department
of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki
54124, Greece
| | - E. Kioseoglou
- Laboratory of Inorganic Chemistry, Department
of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki
54124, Greece
| | - J. Venetis
- Laboratory of Inorganic Chemistry, Department
of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki
54124, Greece
| | - V. Psycharis
- Institute
of Materials Science, NCSR “Demokritos”, Aghia Paraskevi,
Attiki 15310, Greece
| | - C. P. Raptopoulou
- Institute
of Materials Science, NCSR “Demokritos”, Aghia Paraskevi,
Attiki 15310, Greece
| | - A. Terzis
- Institute
of Materials Science, NCSR “Demokritos”, Aghia Paraskevi,
Attiki 15310, Greece
| | - G. Voyiatzis
- Foundation
for Research and Technology Hellas (FORTH), Institute of Chemical
Engineering and High Temperature Chemical Processes (ICE/HT), Patras
26500, Greece
| | - M. Bertmer
- Institut
für Experimentelle Physik II, Universität Leipzig, Leipzig
04103, Germany
| | - C. Mateescu
- Banat's
University of Agricultural Sciences and Veterinary Medicine, Timisoara
300645, Romania
| | - A. Salifoglou
- Laboratory of Inorganic Chemistry, Department
of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki
54124, Greece
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Fonseca I, Hayes SE, Bertmer M. Size effects of aromatic substitution in the ortho position on the photodimerization kinetics of α-trans cinnamic acid derivatives. A solid-state NMR study. Phys Chem Chem Phys 2009; 11:10211-8. [DOI: 10.1039/b911127a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fonseca I, Hayes SE, Blümich B, Bertmer M. Temperature stability and photodimerization kinetics of β-cinnamic acid and comparison to its α-polymorph as studied by solid-state NMR spectroscopy techniques and DFT calculations. Phys Chem Chem Phys 2008; 10:5898-907. [DOI: 10.1039/b806861e] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Litvinov VM, Bertmer M, Gasper L, Demco DE, Blümich B. Phase Composition of Block Copoly(ether ester) Thermoplastic Elastomers Studied by Solid-State NMR Techniques. Macromolecules 2003. [DOI: 10.1021/ma030314h] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- V. M. Litvinov
- DSM Research, P.O. Box 18, 6160MD, Geleen, The Netherlands, and Institute for Technical Chemistry and Macromolecular Chemistry, RWTH Aachen, Worringer Weg 1, 52056 Aachen, Germany
| | - M. Bertmer
- DSM Research, P.O. Box 18, 6160MD, Geleen, The Netherlands, and Institute for Technical Chemistry and Macromolecular Chemistry, RWTH Aachen, Worringer Weg 1, 52056 Aachen, Germany
| | - L. Gasper
- DSM Research, P.O. Box 18, 6160MD, Geleen, The Netherlands, and Institute for Technical Chemistry and Macromolecular Chemistry, RWTH Aachen, Worringer Weg 1, 52056 Aachen, Germany
| | - D. E. Demco
- DSM Research, P.O. Box 18, 6160MD, Geleen, The Netherlands, and Institute for Technical Chemistry and Macromolecular Chemistry, RWTH Aachen, Worringer Weg 1, 52056 Aachen, Germany
| | - B. Blümich
- DSM Research, P.O. Box 18, 6160MD, Geleen, The Netherlands, and Institute for Technical Chemistry and Macromolecular Chemistry, RWTH Aachen, Worringer Weg 1, 52056 Aachen, Germany
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Buda A, Demco DE, Bertmer M, Blümich B, Reining B, Keul H, Höcker H. Domain sizes in heterogeneous polymers by spin diffusion using single-quantum and double-quantum dipolar filters. Solid State Nucl Magn Reson 2003; 24:39-67. [PMID: 12850256 DOI: 10.1016/s0926-2040(03)00020-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
1H spin-diffusion experiments employing a double-quantum (DQ) dipolar filter were performed for the characterization of the microdomain structure of heterogeneous samples. For this purpose the NMR spin-diffusion process was analysed based on a model morphology of three different domains with arbitrary sizes, diffusivities, and filter efficiency. General analytical solutions for z magnetization source and sink were obtained valid for a one-dimensional lamellar morphology in the full range of spin-diffusion times. These solutions of the spin-diffusion equations were used for determining the crystalline, interface, and amorphous domain sizes in polystyrene-poly(ethylene oxide) (PS-PEO) and poly(hydroxyethylmethacrylate)-poly(ethylene oxide) (PHEMA-PEO). The DQ dipolar filter has a good efficiency for PS-PEO but is only partially efficient in filtering the signal of the mobile domains in the PHEMA-PEO diblock copolymer. The domain sizes measured by the DQ filter method are compared to those obtained using the traditional dipolar filter creating z magnetization in the mobile domains.
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Affiliation(s)
- A Buda
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany
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Wang M, Bertmer M, Demco DE, Blümich B, Litvinov VM, Barthel H. Indication of Heterogeneity in Chain-Segment Order of a PDMS Layer Grafted onto a Silica Surface by 1H Multiple-Quantum NMR. Macromolecules 2003. [DOI: 10.1021/ma0217534] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mingfei Wang
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; DSM Research, P.O. Box 18, 6160 MD Geelen, The Netherlands; and Wacker-Chemie GmbH, Werk Burghausen, D-84480 Burghausen, Germany
| | - M. Bertmer
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; DSM Research, P.O. Box 18, 6160 MD Geelen, The Netherlands; and Wacker-Chemie GmbH, Werk Burghausen, D-84480 Burghausen, Germany
| | - D. E. Demco
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; DSM Research, P.O. Box 18, 6160 MD Geelen, The Netherlands; and Wacker-Chemie GmbH, Werk Burghausen, D-84480 Burghausen, Germany
| | - B. Blümich
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; DSM Research, P.O. Box 18, 6160 MD Geelen, The Netherlands; and Wacker-Chemie GmbH, Werk Burghausen, D-84480 Burghausen, Germany
| | - V. M. Litvinov
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; DSM Research, P.O. Box 18, 6160 MD Geelen, The Netherlands; and Wacker-Chemie GmbH, Werk Burghausen, D-84480 Burghausen, Germany
| | - H. Barthel
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringerweg 1, D-52056 Aachen, Germany; DSM Research, P.O. Box 18, 6160 MD Geelen, The Netherlands; and Wacker-Chemie GmbH, Werk Burghausen, D-84480 Burghausen, Germany
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Buda A, Demco DE, Bertmer M, Blümich B, Litvinov VM, Penning JP. General Analytical Description of Spin-Diffusion for a Three-Domain Morphology. Application to Melt-Spun Nylon 6 Fibers. J Phys Chem B 2003. [DOI: 10.1021/jp021684v] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. Buda
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringer Weg 1, D-52056 Aachen, Germany
| | - D. E. Demco
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringer Weg 1, D-52056 Aachen, Germany
| | - M. Bertmer
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringer Weg 1, D-52056 Aachen, Germany
| | - B. Blümich
- Institut für Technische Chemie und Makromolekulare Chemie, Rheinisch-Westfälische Technische Hochschule, Worringer Weg 1, D-52056 Aachen, Germany
| | - V. M. Litvinov
- DSM Research, P.O. Box 18, 6160 MD Geleen, The Netherlands
| | - J. P. Penning
- DSM Fiber Intermediates, P.O. Box 18, 6160 MD Geleen, The Netherlands
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Abstract
A two-dimensional (2D) double-quantum (DQ) experiment under rotational resonance (R(2)) conditions is introduced for evaluating dipolar couplings in rotating solids. The contributions from the R(2)-recoupled dipolar interaction and the J coupling can be conveniently separated in the resulting 2D R(2)-DQ spectrum, so that the unknown dipolar coupling can readily be extracted, provided that the values of the involved J coupling constants are known. Since the measured parameters are integral intensity ratios between suitably chosen absorption peaks in the 2D spectrum, the proposed method is characterized by a reduced sensitivity to relaxation parameters. The effect of rotor-modulated terms, including chemical shift anisotropy, is efficiently averaged out by synchronizing the excitation/reconversion time with the rotor period. All of these features are demonstrated theoretically by the example of two model systems, namely, isolated spin-pairs and a three-spin system. The results of the theoretical models are applied to both (13)C and (1)H nuclei to extract dipolar couplings in uniformly (13)C labeled L-alanine and a crosslinked natural rubber.
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Affiliation(s)
- C Filip
- Institute for Technical Chemistry and Macromolecular Chemistry, RWTH Aachen, Worringerweg 1, D-52074 Aachen, Germany
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Ren X, Bartusseck I, Bertmer M, Demco D, Stapf S, Blümich B, Kern C, Jess A. NMR study of tortuosity during deactivation and decoking of a naphtha reforming catalyst. Magn Reson Imaging 2001. [DOI: 10.1016/s0730-725x(01)00345-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Bertmer M, Eckert H. Dephasing of spin echoes by multiple heteronuclear dipolar interactions in rotational echo double resonance NMR experiments. Solid State Nucl Magn Reson 1999; 15:139-152. [PMID: 10672938 DOI: 10.1016/s0926-2040(99)00050-8] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The application of rotational echo double resonance (REDOR) nuclear magnetic resonance (NMR) for accurate distance measurements has thus far been largely restricted to isolated heteronuclear two-spin systems. In the present paper, the informational content of REDOR curves is explored for systems characterized by multi-spin interactions. To this end, numerical REDOR simulations are presented for cases in which single observe spins S are dipolarly coupled to groups of spins I in distinct geometries. To develop the utility of REDOR for characterizing dipolar couplings in unknown and/or ill-defined geometries, the validity ranges and systematic errors of certain analytical approximations are studied. In the limit of short dipolar evolution times where 0 < deltaS/S0 < or = 0.2 to 0.3, the REDOR difference signal intensity increases approximately proportional to the square of the dipolar evolution time. Here, the curvature depends simply on the second moment M2 characterizing the overall strength of the heterodipolar coupling, irrespective of specific molecular geometries. Fitting experimental REDOR data in this manner produces slight systematic underestimates of M2. However, these errors tend to be counterbalanced by additional systematic errors made by neglecting weak couplings to more remote spins and distribution effects caused by disorder. Based on these findings, the results suggest a convenient method of obtaining site-resolved second moment information in disordered materials.
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Affiliation(s)
- M Bertmer
- Institut für Physikalische Chemie, Westfälische Wilhelms-Universit, Münster, Germany
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