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Pascariu M, Bernasconi L, Krzystyniak M, Taylor J, Rudić S. Comprehensive Analysis of Methyl-β-D-ribofuranoside: A Multifaceted Spectroscopic and Theoretical Approach. J Phys Chem A 2024; 128:2111-2120. [PMID: 38469744 PMCID: PMC10961842 DOI: 10.1021/acs.jpca.4c00266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 02/27/2024] [Accepted: 02/29/2024] [Indexed: 03/13/2024]
Abstract
This study presents a comprehensive analysis of the vibrational spectra of methyl-β-D-ribofuranoside. Employing a combination of inelastic neutron scattering, Raman, and infrared spectroscopy allows for the observation of all modes regardless of the selection rules. The experimental techniques were complemented by density functional theory computational methods using both gas-phase (Gaussian) and solid-state (CRYSTAL, CASTEP) approaches to provide an unambiguous assignment of the defining vibrational features. Two distinct structures of the molecule were identified in the unit cell, differentiated mainly by the orientation of the furanose ring O-H bonds. The low-energy region of the spectrum (<400 cm-1) is dominated by lattice vibrations and functional group rotation, while the midenergy region is dominated by out-of-plane bending motions of the furanose ring (400-900 cm-1) and by C-H bending in the methyl and methylene groups (1400-1600 cm-1). The high-energy region (>2800 cm-1) encompasses the C-H and O-H stretching modes and offers convincing evidence of at least one H-bonding interaction between the two structures of methyl-β-D-ribofuranoside.
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Affiliation(s)
- Matei Pascariu
- ISIS
Neutron and Muon Source, Rutherford Appleton Laboratory, STFC, Harwell Campus, Chilton, Oxfordshire OX11 0QX, U.K.
- Department
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Leonardo Bernasconi
- Center
for Research Computing & Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, United States
| | - Matthew Krzystyniak
- ISIS
Neutron and Muon Source, Rutherford Appleton Laboratory, STFC, Harwell Campus, Chilton, Oxfordshire OX11 0QX, U.K.
| | - James Taylor
- ISIS
Neutron and Muon Source, Rutherford Appleton Laboratory, STFC, Harwell Campus, Chilton, Oxfordshire OX11 0QX, U.K.
| | - Svemir Rudić
- ISIS
Neutron and Muon Source, Rutherford Appleton Laboratory, STFC, Harwell Campus, Chilton, Oxfordshire OX11 0QX, U.K.
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2
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Parker SF, Williams KPJ, Smith T, Ramirez-Cuesta AJ, Daemen LL. Vibrational Spectroscopy of Hexahalo Complexes. Inorg Chem 2022; 61:5844-5854. [PMID: 35380803 PMCID: PMC9171826 DOI: 10.1021/acs.inorgchem.2c00125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
![]()
Halogenated
inorganic complexes Ax[MHaly] (A = alkali metal or alkaline earth, M = transition
or main group metal, x = 1–3,
and y = 2–9) are an archetypal class of compounds
that provide entry points to large areas of inorganic and physical
chemistry. All of the hexahalo complexes adopt an octahedral, Oh, symmetry (or nearly so). Consequently, one
of the bending modes is forbidden in both the infrared and Raman spectra.
In the solid state, many of the complexes crystallize in the cubic
space group Fm3̅m, which preserves
the octahedral symmetry. Even for those that are not cubic, the octahedral
symmetry of the [MHal6]n− ion is largely retained and, to a good approximation,
so are the selection rules. In the present work, we show that by using
the additional information provided by neutron vibrational spectroscopy,
in combination with conventional optical spectroscopies, we can generate
complete and unambiguous assignments for all the modes. Comparison
of the experimental and calculated transition energies for the systems
where periodic-density functional theory was possible (i.e., those
for which the crystal structure is known) shows that the agreement
is almost quantitative. We also provide a linear relationship that
enables the prediction of the forbidden mode. Halogenated inorganic complexes provide
entry to large areas
of inorganic chemistry. All of the hexahalo complexes adopt an octahedral
symmetry, so one of the bending modes is forbidden in both the infrared
and Raman spectra. By using neutron vibrational spectroscopy, we can
generate unambiguous assignments for all the modes. Comparison of
experimental and calculated transition energies shows that the agreement
is almost quantitative. We also provide a linear relationship that
enables prediction of the forbidden mode.
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Affiliation(s)
- Stewart F Parker
- ISIS Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, U.K.,School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow G12 8QQ, U.K
| | | | - Timothy Smith
- Renishaw plc, New Mills, Gloucestershire, Wotton-under-Edge GL12 8JR, U.K
| | - Anibal J Ramirez-Cuesta
- Neutron Science Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Luke L Daemen
- Neutron Science Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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3
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Finger R, Hansen TC, Kohlmann H. Simultaneous neutron powder diffraction and Raman spectroscopy – an approach of combining two complementary techniques. Z KRIST-CRYST MATER 2021. [DOI: 10.1515/zkri-2021-2051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Diffraction techniques are well-established methods for crystal structure determination as well as phase identification and quantification. Raman spectroscopy can be a valuable complementary characterization technique, because in contrast to the former it yields also information on amorphous materials and it is a probe for short-range structural effects. The herein presented setup allows for simultaneous neutron diffraction and Raman spectroscopy, shown with a sample of lead sulfate under ambient conditions as a proof of principle. In order to fulfil requirements of both methods, a sapphire single-crystal is used as a sample holder. Practical considerations for successful simultaneous in situ neutron diffraction and Raman spectroscopic measurements are given.
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Affiliation(s)
- Raphael Finger
- Inorganic Chemistry, Leipzig University , Johanisallee 29 , 04103 Leipzig , Germany
| | - Thomas C. Hansen
- Institut Laue-Langevin , 71 avenue des Martyrs , 38000 Grenoble , France
| | - Holger Kohlmann
- Institut für Anorganische Chemie, Universität Leipzig , Johannisallee 29 , 04103 Leipzig , Germany
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4
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Foglia F, Lyonnard S, Sakai VG, Berrod Q, Zanotti JM, Gebel G, Clancy AJ, McMillan PF. Progress in neutron techniques: towards improved polymer electrolyte membranes for energy devices. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:264005. [PMID: 33906172 DOI: 10.1088/1361-648x/abfc10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 04/27/2021] [Indexed: 06/12/2023]
Abstract
Design and implementation of advanced membrane formulations for selective transport of ions and molecular species are critical for creating the next generations of fuel cells and separation devices. It is necessary to understand the detailed transport mechanisms over time- and length-scales relevant to the device operation, both in laboratory models and in working systems under realistic operational conditions. Neutron scattering techniques including quasi-elastic neutron scattering, reflectivity and imaging are implemented at beamline stations at reactor and spallation source facilities worldwide. With the advent of new and improved instrument design, detector methodology, source characteristics and data analysis protocols, these neutron scattering techniques are emerging as a primary tool for research to design, evaluate and implement advanced membrane technologies for fuel cell and separation devices. Here we describe these techniques and their development and implementation at the ILL reactor source (Institut Laue-Langevin, Grenoble, France) and ISIS Neutron and Muon Spallation source (Harwell Science and Technology Campus, UK) as examples. We also mention similar developments under way at other facilities worldwide, and describe approaches such as combining optical with neutron Raman scattering and x-ray absorption with neutron imaging and tomography, and carrying out such experiments in specialised fuel cells designed to mimic as closely possible actualoperandoconditions. These experiments and research projects will play a key role in enabling and testing new membrane formulations for efficient and sustainable energy production/conversion and separations technologies.
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Affiliation(s)
- Fabrizia Foglia
- Department of Chemistry, Christopher Ingold Laboratory, University College London, 20 Gordon St., London WC1H 0AJ, United Kingdom
| | - Sandrine Lyonnard
- University Grenoble Alpes, CNRS, CEA, IRIG-SyMMES, 38000 Grenoble, France
| | - Victoria García Sakai
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Chilton OX11 0QX, United Kingdom
| | - Quentin Berrod
- University Grenoble Alpes, CNRS, CEA, IRIG-SyMMES, 38000 Grenoble, France
| | - Jean-Marc Zanotti
- Laboratoire Léon Brillouin (CEA-CNRS), Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - Gérard Gebel
- University Grenoble Alpes, CEA LITEN, 38000 Grenoble, France
| | - Adam J Clancy
- Department of Chemistry, Christopher Ingold Laboratory, University College London, 20 Gordon St., London WC1H 0AJ, United Kingdom
| | - Paul F McMillan
- Department of Chemistry, Christopher Ingold Laboratory, University College London, 20 Gordon St., London WC1H 0AJ, United Kingdom
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5
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Pounot K, Chaaban H, Foderà V, Schirò G, Weik M, Seydel T. Tracking Internal and Global Diffusive Dynamics During Protein Aggregation by High-Resolution Neutron Spectroscopy. J Phys Chem Lett 2020; 11:6299-6304. [PMID: 32663030 DOI: 10.1021/acs.jpclett.0c01530] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Proteins can misfold and form either amorphous or organized aggregates with different morphologies and features. Aggregates of amyloid nature are pathological hallmarks in so-called protein conformational diseases, including Alzheimer's and Parkinson's. Evidence prevails that the transient early phases of the reaction determine the aggregate morphology and toxicity. As a consequence, real-time monitoring of protein aggregation is of utmost importance. Here, we employed time-resolved neutron backscattering spectroscopy to follow center-of-mass self-diffusion and nano- to picosecond internal dynamics of lysozyme during aggregation into a specific β-sheet rich superstructure, called particulates, formed at the isoelectric point of the protein. Particulate formation is found to be a one-step process, and protein internal dynamics, to remain unchanged during the entire aggregation process. The time-resolved neutron backscattering spectroscopy approach developed here, in combination with standard kinetics assays, provides a unifying framework in which dynamics and conformational transitions can be related to the different aggregation pathways.
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Affiliation(s)
- Kevin Pounot
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, F-38000 Grenoble, France
- Institut Max von Laue - Paul Langevin, 71 avenue des Martyrs, CS 20156, F-38042 Grenoble cedex 9, France
| | - Hussein Chaaban
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Vito Foderà
- Department of Pharmacy, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Giorgio Schirò
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, F-38000 Grenoble, France
| | - Martin Weik
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, F-38000 Grenoble, France
| | - Tilo Seydel
- Institut Max von Laue - Paul Langevin, 71 avenue des Martyrs, CS 20156, F-38042 Grenoble cedex 9, France
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6
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Parker SF, Ramirez-Cuesta AJ, Daemen LL. The structure and vibrational spectroscopy of cryolite, Na 3AlF 6. RSC Adv 2020; 10:25856-25863. [PMID: 35518579 PMCID: PMC9055329 DOI: 10.1039/d0ra04804f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 07/01/2020] [Indexed: 11/21/2022] Open
Abstract
Cryolite, Na3[AlF6], is essential to commercial aluminium production because alumina is readily soluble in molten cryolite. While the liquid state has been extensively investigated, the spectroscopy of the solid state has been largely ignored. In this paper, we show that the structure at 5 K is the same as that at room temperature. We use a combination of infrared and Raman spectroscopies together with inelastic neutron scattering (INS) spectroscopy. The use of INS enables access to all of the modes of Na3[AlF6], including those that are forbidden to the optical spectroscopies. Our spectral assignments are supported by density functional theory calculations of the complete unit cell. We use a combination of infrared, Raman and inelastic neutron scattering spectroscopies to access all of the modes of cryolite, Na3[AlF6], including those that are forbidden to the optical spectroscopies.![]()
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Affiliation(s)
- Stewart F Parker
- ISIS Facility, STFC Rutherford Appleton Laboratory Chilton, Didcot Oxon OX11 0QX UK
| | - Anibal J Ramirez-Cuesta
- Spallation Neutron Source, Neutron Spectroscopy Division, Oak Ridge National Laboratory Oak Ridge TN 37831-6475 USA
| | - Luke L Daemen
- Spallation Neutron Source, Neutron Spectroscopy Division, Oak Ridge National Laboratory Oak Ridge TN 37831-6475 USA
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7
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Parker SF, Cavaye H, Callear SK. Structure and Dynamics of the Superprotonic Conductor Caesium Hydrogen Sulfate, CsHSO 4. Molecules 2020; 25:molecules25061271. [PMID: 32168860 PMCID: PMC7143950 DOI: 10.3390/molecules25061271] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 03/06/2020] [Accepted: 03/07/2020] [Indexed: 12/03/2022] Open
Abstract
We have investigated caesium hydrogen sulfate, CsHSO4, in all three of its ambient pressure phases by total scattering neutron diffraction, inelastic neutron scattering (INS) and Raman spectroscopies and periodic density functional theory calculations. Above 140 °C, CsHSO4 undergoes a phase transition to a superprotonic conductor that has potential application in intermediate temperature fuel cells. Total scattering neutron diffraction data clearly show that all the existing structures of this phase are unable to describe the local structure, because they have either partial occupancies of the atoms and/or non-physical O–H distances. Knowledge of the local structure is crucial because it is this that determines the conduction mechanism. Starting from one of the previous models, we have generated a new structure that has no partial occupancies and reasonable O–H distances. After geometry optimisation, the calculated radial distribution function is in reasonable agreement with the experimental data, as are the calculated and observed INS and Raman spectra. This work is particularly notable in that we have measured INS spectra in the O–H stretch region above room temperature, which is extremely rare. The INS spectra have the enormous advantage that the electrical anharmonicity that complicates the infrared spectra is absent and the stretch modes are plainly seen.
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8
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Parker SF, Jayasooriya UA. Assignment of the solid state spectra of the group VI hexacarbonyls by inelastic neutron scattering spectroscopy. Phys Chem Chem Phys 2019; 21:24950-24955. [PMID: 31702745 DOI: 10.1039/c9cp05191k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The solid state vibrational spectra of M(CO)6, (M = Cr, Mo, W) in the region below 800 cm-1 have been assigned by a combination of infrared, Raman and the first reported inelastic neutron scattering (INS) spectra from homoleptic metal carbonyls. This region comprises of the lattice modes, the OC-M-CO deformations, the M-C[triple bond, length as m-dash]O bends and the M-C stretches. Three modes that are forbidden in both the infrared and Raman spectra of the parent Oh symmetry gas phase molecule occur in this region. The absence of selection rules for INS spectroscopy means that all three modes are clearly seen for the first time, all previous work has relied on overtone and combination modes. Periodic density functional theory calculations of the complete orthorhombic structure support the assignments.
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Affiliation(s)
- Stewart F Parker
- ISIS Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, UK.
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9
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Parker SF, Butler IR. Synthesis, Computational Studies, Inelastic Neutron Scattering, Infrared and Raman Spectroscopy of Ruthenocene. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201800914] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Stewart F. Parker
- STFC Rutherford Appleton Laboratory ISIS Facility Chilton OX11 0QX Didcot, Oxon UK
| | - Ian R. Butler
- School of Chemistry Bangor University Bangor LL57 2UW Gwynedd Wales UK
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10
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Parker SF, Zhong L, Harig M, Kuck D. Spectroscopic characterisation of centropolyindanes. Phys Chem Chem Phys 2019; 21:4568-4577. [PMID: 30742151 DOI: 10.1039/c8cp07311b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A highly promising class of three-dimensional polyaromatic hydrocarbons comprises the centropolyindanes. The characteristic feature of these compounds is the mutual fusion of several molecules of indane along the saturated C-C bonds of their cyclopentane rings. Among the polycyclic aromatic hydrocarbons, the centropolyindanes are special because of the saturated core of sp3-hybridised carbon atoms embedded in a three-dimensional environment of aromatic building blocks. While the centropolyindanes and their numerous derivatives have been studied in detail by NMR spectroscopy, mass spectrometry and X-ray diffraction, investigation of their vibrational features, and especially those of the neopentane core present in most cases, have not been performed so far. In the present paper, we report the first systematic study of a set of centropolyindanes by vibrational spectroscopy, using inelastic neutron scattering (INS), infrared and Raman spectroscopies.
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Affiliation(s)
- Stewart F Parker
- ISIS Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, UK.
| | - Lisha Zhong
- Downing College, University of Cambridge, Regent Street, Cambridge, CB2 1DQ, UK
| | - Marco Harig
- Department of Chemistry and Center for Molecular Materials (CM2), Bielefeld University, 33615 Bielefeld, Germany
| | - Dietmar Kuck
- Department of Chemistry and Center for Molecular Materials (CM2), Bielefeld University, 33615 Bielefeld, Germany
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11
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Scalambra F, Rudić S, Romerosa A. Molecular Insights into Bulk and Porous κ2
P,N
-PTA Metal-Organic Polymers by Simultaneous Raman Spectroscopy and Inelastic Neutron Scattering. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801283] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Franco Scalambra
- Áea de Química Inorgánica-CIESOL; Universidad de Almería; Carretera Sacramento s/n 04120 La Canada de San Urbano Spain
| | - Svemir Rudić
- ISIS Facility; STFC, Rutherford Appleton Laboratory; Chilton OX11 0QX Didcot UK
| | - Antonio Romerosa
- Áea de Química Inorgánica-CIESOL; Universidad de Almería; Carretera Sacramento s/n 04120 La Canada de San Urbano Spain
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12
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Chapman S, O'Malley AJ, Parker SF, Raja R. Comprehensive Vibrational Spectroscopic Characterization of Nylon-6 Precursors for Precise Tracking of the Beckmann Rearrangement. Chemphyschem 2018; 19:3196-3203. [PMID: 30253015 DOI: 10.1002/cphc.201800721] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Indexed: 11/05/2022]
Abstract
As a key step in nylon-6 synthesis, the Beckmann rearrangement is an ongoing target of catalytic studies that seek to improve the sustainability of polymer manufacture. Whilst solid-acid catalysts (predominantly zeotypes) have proven effective for this transformation, the development of more active and selective systems demands an understanding of fundamental catalytic mechanisms. In this undertaking, in situ and operando characterization techniques can be informative, provided rigorous spectroscopic groundwork is in place. Thus, to facilitate mechanistic studies we present a detailed investigation of the vibrational spectra of cyclohexanone, cyclohexanone oxime, ϵ-caprolactam and their D10-isotopomers, in the solid state. Variable-temperature infrared (150-300 K) and Raman (10-300 K) spectra are reported alongside inelastic neutron scattering data. Moreover, where key vibrational modes have been assigned with the aid of periodic density functional theory calculations, it has been possible to include hydrogen-bonding interactions explicitly.
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Affiliation(s)
- Stephanie Chapman
- School of Chemistry, University of Southampton, University Road, Southampton, SO17 1BJ, UK
| | - Alexander J O'Malley
- Centre for Sustainable Chemical Technologies (CSCT), Department of Chemistry, University of Bath, Bath, BA2 7AY, UK
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
- UK Catalysis Hub, Research Complex at Harwell, Science and Technology Facilities Council Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Oxon, OX11 0QX, UK
| | - Stewart F Parker
- UK Catalysis Hub, Research Complex at Harwell, Science and Technology Facilities Council Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Oxon, OX11 0QX, UK
- ISIS Pulsed Neutron and Muon Facility, Science and Technology Facilities Council Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Oxon, OX11 0QX, UK
| | - Robert Raja
- School of Chemistry, University of Southampton, University Road, Southampton, SO17 1BJ, UK
- UK Catalysis Hub, Research Complex at Harwell, Science and Technology Facilities Council Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Oxon, OX11 0QX, UK
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13
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Gillis RC, Cheng YQ, Gallmeier FX, Hartl MA, Huegle T, Iverson EB. A sample holder for simultaneous Raman and neutron vibrational spectroscopy. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:013112. [PMID: 29390719 DOI: 10.1063/1.4997933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We have built a sample holder (called a center stick or sample stick) for performing simultaneous Raman and neutron vibrational spectroscopy on samples of material at the VISION neutron vibrational spectrometer of the Spallation Neutron Source at Oak Ridge National Laboratory. This equipment holds material samples in the neutron beam within the cryogenic environment of the VISION spectrometer, allowing for samples to be studied at temperatures as low as 5 K. It also provides the capability for gas to be loaded to or evacuated from the sample while it is loaded at VISION. The optical components for directing and filtering light are located within the cryogenic volume, in physical proximity to the sample. We describe the construction of this sample holder and discuss our first measurements of simultaneous Raman and neutron vibrational spectra. The samples that we report on were of 4-nitrophenol at a temperature of 20 K and of cryogenic hydrogen of a number of different orthohydrogen fractions.
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Affiliation(s)
- R C Gillis
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Y Q Cheng
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - F X Gallmeier
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - M A Hartl
- European Spallation Source ERIC, Box 176, S-221 00 Lund, Sweden
| | - T Huegle
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - E B Iverson
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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14
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Parker SF. Complete assignment of the vibrational spectra of borazine: the inorganic benzene. RSC Adv 2018; 8:23875-23880. [PMID: 35540255 PMCID: PMC9081783 DOI: 10.1039/c8ra04845b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 06/26/2018] [Indexed: 11/21/2022] Open
Abstract
Borazine continues to be relevant in industries as diverse as energy utilisation via fuel cells and as a possible route to boron nitride. Despite it having been known for almost a century, the vibrational spectroscopy of borazine is still incomplete. The inclusion of inelastic neutron scattering spectra has enabled the observation of all of the internal modes of borazine (including the infrared and Raman forbidden modes) for the first time. A complete assignment has been generated with the use of dispersion corrected DFT calculations. This has shown that the accepted ordering of the modes is incorrect in some cases and rationalised conflicting assignments in the literature. Inelastic neutron scattering spectroscopy has detected all of the internal modes of borazine, including the infrared and Raman forbidden modes.![]()
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15
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Rogers SM, Dimitratos N, Jones W, Bowker M, Kanaras AG, Wells PP, Catlow CRA, Parker SF. The adsorbed state of a thiol on palladium nanoparticles. Phys Chem Chem Phys 2016; 18:17265-71. [DOI: 10.1039/c6cp00957c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Imaging, spectroscopy and computation show that 1-dodecanethiol forms largely ordered 1-dodecanethiolate on the surface of palladium nanoparticles.
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Affiliation(s)
- Scott M. Rogers
- Department of Chemistry
- University College London
- London
- UK
- UK Catalysis Hub
| | - Nikolaos Dimitratos
- Department of Chemistry
- University College London
- London
- UK
- Cardiff Catalysis Institute
| | - Wilm Jones
- UK Catalysis Hub
- Research Complex at Harwell
- STFC Rutherford Appleton Laboratory
- Didcot
- UK
| | - Michael Bowker
- UK Catalysis Hub
- Research Complex at Harwell
- STFC Rutherford Appleton Laboratory
- Didcot
- UK
| | - Antonios G. Kanaras
- School of Physics and Astronomy
- Faculty of Physical Sciences and Engineering
- University of Southampton
- Highfield
- Southampton
| | - Peter P. Wells
- Department of Chemistry
- University College London
- London
- UK
- UK Catalysis Hub
| | | | - Stewart F. Parker
- UK Catalysis Hub
- Research Complex at Harwell
- STFC Rutherford Appleton Laboratory
- Didcot
- UK
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16
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Refson K, Parker SF. Assignment of the Internal Vibrational Modes of C70 by Inelastic Neutron Scattering Spectroscopy and Periodic-DFT. ChemistryOpen 2015; 4:620-5. [PMID: 26491642 PMCID: PMC4608530 DOI: 10.1002/open.201500069] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Indexed: 11/11/2022] Open
Abstract
The fullerene C70 may be considered as the shortest possible nanotube capped by a hemisphere of C60 at each end. Vibrational spectroscopy is a key tool in characterising fullerenes, and C70 has been studied several times and spectral assignments proposed. Unfortunately, many of the modes are either forbidden or have very low infrared or Raman intensity, even if allowed. Inelastic neutron scattering (INS) spectroscopy is not subject to selection rules, and all the modes are allowed. We have obtained a new INS spectrum from a large sample recorded at the highest resolution available. An advantage of INS spectroscopy is that it is straightforward to calculate the spectral intensity from a model. We demonstrate that all previous assignments are incorrect in at least some respects and propose a new assignment based on periodic density functional theory (DFT) that successfully reproduces the INS, infrared, and Raman spectra.
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Affiliation(s)
- Keith Refson
- ISIS Facility, Science and Technology Facilities Council (STFC), Rutherford Appleton Laboratory Chilton, Didcot, OX11 0QX, UK ; Department of Physics, Royal Holloway, University of London Egham, TW20 0EX, UK
| | - Stewart F Parker
- ISIS Facility, Science and Technology Facilities Council (STFC), Rutherford Appleton Laboratory Chilton, Didcot, OX11 0QX, UK
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17
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Paudel A, Raijada D, Rantanen J. Raman spectroscopy in pharmaceutical product design. Adv Drug Deliv Rev 2015; 89:3-20. [PMID: 25868453 DOI: 10.1016/j.addr.2015.04.003] [Citation(s) in RCA: 161] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 03/15/2015] [Accepted: 04/01/2015] [Indexed: 12/20/2022]
Abstract
Almost 100 years after the discovery of the Raman scattering phenomenon, related analytical techniques have emerged as important tools in biomedical sciences. Raman spectroscopy and microscopy are frontier, non-invasive analytical techniques amenable for diverse biomedical areas, ranging from molecular-based drug discovery, design of innovative drug delivery systems and quality control of finished products. This review presents concise accounts of various conventional and emerging Raman instrumentations including associated hyphenated tools of pharmaceutical interest. Moreover, relevant application cases of Raman spectroscopy in early and late phase pharmaceutical development, process analysis and micro-structural analysis of drug delivery systems are introduced. Finally, potential areas of future advancement and application of Raman spectroscopic techniques are discussed.
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18
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Wolf H, Lock N, Parker SF, Stalke D. Direct Spectroscopic Evidence of the Mechanism behind the Phase Transition of [2,2]-Paracyclophane. Chemistry 2015; 21:4556-60. [DOI: 10.1002/chem.201405948] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Indexed: 11/09/2022]
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19
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Marques MPM, Gianolio D, Cibin G, Tomkinson J, Parker SF, Valero R, Pedro Lopes R, Batista de Carvalho LAE. A molecular view of cisplatin's mode of action: interplay with DNA bases and acquired resistance. Phys Chem Chem Phys 2015; 17:5155-71. [DOI: 10.1039/c4cp05183a] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A definite molecular picture of cisplatin's MOA is presented, including a detailed interpretation of the glutathione-mediated drug scavenging process.
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Affiliation(s)
- M. Paula M. Marques
- Molecular Physical Chemistry R&D Unit
- Fac. Science and Technology
- Univ. Coimbra
- 3004-535 Coimbra
- Portugal
| | - Diego Gianolio
- Diamond Light Source
- STFC Harwell Science and Innovation Campus
- UK
| | | | - John Tomkinson
- ISIS Facility
- STFC Rutherford Appleton Laboratory
- Didcot
- UK
| | | | - Rosendo Valero
- Molecular Physical Chemistry R&D Unit
- Fac. Science and Technology
- Univ. Coimbra
- 3004-535 Coimbra
- Portugal
| | - R. Pedro Lopes
- Molecular Physical Chemistry R&D Unit
- Fac. Science and Technology
- Univ. Coimbra
- 3004-535 Coimbra
- Portugal
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20
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Marques MPM, Valero R, Parker SF, Tomkinson J, Batista de Carvalho LAE. Polymorphism in cisplatin anticancer drug. J Phys Chem B 2013; 117:6421-9. [PMID: 23642237 DOI: 10.1021/jp403486z] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
This study reports a combined experimental and theoretical study of the solid-state polymorphism of the anticancer agent cisplatin. A complete assignment was performed for the inelastic neutron scattering (INS) and Raman spectra collected simultaneously for cisplatin, at different temperatures, with a view to obtain reliable and definitive evidence of the relative thermal stability of its α and β polymorphic species. A marked temperature-dependent hysteresis was observed, as previously reported in the literature. Theoretical calculations were carried out at the density functional theory level, using a plane-wave basis set approach and pseudopotentials. A detailed comparison with the experimental Raman and INS data showed that the α polymorph is present at the lowest temperatures, whereas the β form occurs near room temperature. Furthermore, regions of coexistence of both forms are identified, which depend on the working mode (heating or cooling). These findings imply that Raman spectroscopy allows clear identification of the α and β polymorphs at a given temperature and can unambiguously discriminate between them. Elucidation of the polymorphic equilibrium of this widely used anticancer drug is paramount for its pharmaceutical preparation and storage conditions.
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Affiliation(s)
- M Paula M Marques
- Research Unit Molecular Physical Chemistry, Faculty of Science and Technology, University of Coimbra, 3004-535 Coimbra, Portugal.
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21
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Parker SF, Refson K, Bennett RD, Best J, Mel’nikov MY, Weinstein JA. Assignment of Metal–Ligand Modes in Pt(II) Diimine Complexes Relevant to Solar Energy Conversion. Inorg Chem 2012; 51:9748-56. [DOI: 10.1021/ic3011184] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Robert D. Bennett
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Jonathan Best
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
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22
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Barroso-Bujans F, Fernandez-Alonso F, Cerveny S, Arrese-Igor S, Alegría A, Colmenero J. Two-Dimensional Subnanometer Confinement of Ethylene Glycol and Poly(ethylene oxide) by Neutron Spectroscopy: Molecular Size Effects. Macromolecules 2012. [DOI: 10.1021/ma202655f] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fabienne Barroso-Bujans
- Centro de Física de Materiales-Material Physics Center (CSIC-UPV/EHU), Paseo Manuel Lardizábal 5, 20018 San Sebastián, Spain
| | - Felix Fernandez-Alonso
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire
OX11 0QX, U.K
- Department of Physics and Astronomy, University College London, Gower Street, London, WC1E
6BT, U.K
| | - Silvina Cerveny
- Centro de Física de Materiales-Material Physics Center (CSIC-UPV/EHU), Paseo Manuel Lardizábal 5, 20018 San Sebastián, Spain
| | - Silvia Arrese-Igor
- Centro de Física de Materiales-Material Physics Center (CSIC-UPV/EHU), Paseo Manuel Lardizábal 5, 20018 San Sebastián, Spain
| | - Angel Alegría
- Centro de Física de Materiales-Material Physics Center (CSIC-UPV/EHU), Paseo Manuel Lardizábal 5, 20018 San Sebastián, Spain
- Departamento
de Física
de Materiales, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
| | - Juan Colmenero
- Centro de Física de Materiales-Material Physics Center (CSIC-UPV/EHU), Paseo Manuel Lardizábal 5, 20018 San Sebastián, Spain
- Departamento
de Física
de Materiales, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
- Donostia International Physics Center, Paseo Manuel Lardizábal 4, 20018
San Sebastián, Spain
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23
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Magazù S, Migliardo F, Parker SF. Vibrational Properties of Bioprotectant Mixtures of Trehalose and Glycerol. J Phys Chem B 2011; 115:11004-9. [DOI: 10.1021/jp205599a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Salvatore Magazù
- Department of Physics, University of Messina, Viale D’Alcontres
31, P.O. Box 55, 98166 Messina, Italy
| | - Federica Migliardo
- Department of Physics, University of Messina, Viale D’Alcontres
31, P.O. Box 55, 98166 Messina, Italy
| | - Stewart F. Parker
- ISIS Facility, Rutherford Appleton Laboratory, Chilton,
Oxon, OX11 0QX United Kingdom
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