Matrix Isolation Infrared Spectroscopy

Willson, Stephen P.; Andrews, Lester

doi:10.1002/0470027320.s2109

Cited by 5 publications

(3 citation statements)

References 31 publications

(40 reference statements)

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“…The low temperatures and the confinement in a solid matrix ensure the suppression of molecular diffusion, and prevent reactions including rearrangements having more than a few kcal mol −1 activation energy. Although the classical combination of MI with infrared or UV/Vis spectroscopy can occasionally distinguish diastereomers, actual sensitivity for the chirality of the molecular motors cannot be achieved.…”

Section: Methodsmentioning

confidence: 99%

Photoisomerization of a Chiral Imine Molecular Switch Followed by Matrix‐Isolation VCD Spectroscopy

2017

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Characterizing the stereochemistry of transient photoisomerization products remains a big challenge for the design of molecular machines, such as unidirectional molecular motors. Often these states are not stable long enough to be characterized in detail using conventional spectroscopic tools. The structurally simple camphorquinone imine 1 serves to illustrate the advantage of combining the matrix-isolation technique with vibrational circular dichroism (VCD) spectroscopy for the investigation of photoisomerizations of chiral molecules. In particular, it is shown that both (E)- and (Z)-1 can be generated photochemically at cryogenic temperatures in an argon matrix, and more importantly, that the stereochemistry of both switching states can be characterized reliably.

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Section: Methodsmentioning

confidence: 99%

Photoisomerization of a Chiral Imine Molecular Switch Followed by Matrix‐Isolation VCD Spectroscopy

2017

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“…To further utilize this conformational sensitivity and to study the photochemistry of chiral molecules, we have combined VCD spectroscopy with the matrix isolation (MI) technique. [30][31][32][33][34] It involves the isolation of the species of interest in a solid inert environment, which is typically a solidified inert gas frozen at cryogenic temperatures (15-25 K). Under these conditions, MI-IR spectra typically show sharper bands than in solution phase, which allows for the spectroscopic differentiation of conformers.…”

Section: Introductionmentioning

confidence: 99%

Matrix effects in MI-VCD spectra of two chiral oxiranes and their potential microscopic origin

Grassin,

Pollok,

Kreienborg

et al. 2023

Phys. Chem. Chem. Phys.

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“…There are many applications of cryogenic (4–77 K) infrared (IR) spectroscopy, ranging from the study of excited states, unstable reaction intermediates, and surface processes, to fundamental studies of molecular structure in exotic solvents, such as noble gases and hydrocarbon matrices. 1–7 Equally, there is a range of examples where high-pressure IR measurements can provide significant insight into chemical 8–11 and physical processes. 12,13 Very high pressure measurements (up to 3 Mbar) are routinely made using a diamond anvil cell.…”

Section: Introductionmentioning

confidence: 99%

High-Pressure–Low-Temperature Cryostat Designed for Use with Fourier Transform Infrared Spectrometers and Time-Resolved Infrared Spectroscopy

et al. 2014

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The design for a new high-pressure-low-temperature infrared (IR) cell for performing experiments using conventional Fourier transform infrared or fast laser-based time-resolved infrared spectroscopy, in a range of solvents, is described. The design builds upon a commercially available compressor and cold end (Polycold PCC(®) and CryoTiger(®)), which enables almost vibration-free operation, ideal for use with sensitive instrumentation. The design of our cell and cryostat allows for the study of systems at temperatures from 77 to 310 K and at pressures up to 250 bar. The CaF2 windows pass light from the mid-IR to the ultraviolet (UV), enabling a number of experiments to be performed, such as Raman, UV-visible absorption spectroscopy, and time-resolved techniques where sample excitation/probing using continuous wave or pulsed lasers is required. We demonstrate the capabilities of this cell by detailing two different applications: (i) the reactivity of a range of Group V-VII organometallic alkane complexes using time-resolved spectroscopy on the millisecond timescale and (ii) the gas-to-liquid phase transition of CO2 at low temperature, which is applicable to measurements associated with transportation issues related to carbon capture and storage.

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Matrix Isolation Infrared Spectroscopy

Cited by 5 publications

References 31 publications

Photoisomerization of a Chiral Imine Molecular Switch Followed by Matrix‐Isolation VCD Spectroscopy

Photoisomerization of a Chiral Imine Molecular Switch Followed by Matrix‐Isolation VCD Spectroscopy

Matrix effects in MI-VCD spectra of two chiral oxiranes and their potential microscopic origin

High-Pressure–Low-Temperature Cryostat Designed for Use with Fourier Transform Infrared Spectrometers and Time-Resolved Infrared Spectroscopy

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