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Related Concept Videos

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Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for...
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Applications of IR Spectroscopy: Overview01:11

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The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
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When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
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The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
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In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
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Raman Spectroscopy Instrumentation: Overview01:26

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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
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Preface: Special Topic on Multidimensional Spectroscopy.

Shaul Mukamel1, Huib J Bakker2

  • 1Department of Chemistry, University of California, Irvine, Irvine, California 92697, USA.

The Journal of Chemical Physics
|June 8, 2015
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Summary
This summary is machine-generated.

Multidimensional spectroscopy uses sequences of optical pulses to reveal molecular structure and dynamics. These advanced nonlinear spectroscopy techniques offer novel insights into electronic and nuclear motions beyond traditional methods.

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Area of Science:

  • Nonlinear spectroscopy
  • Molecular dynamics
  • Quantum chemistry

Background:

  • Multidimensional signals are generated using sequences of short optical pulses.
  • Correlation plots are recorded based on controlled delay periods.
  • Techniques span from THz to X-ray regimes.

Discussion:

  • Multidimensional techniques provide novel structural and dynamical molecular information.
  • This information is not accessible through conventional one-dimensional methods.
  • The field has rapidly developed over the past 20 years.

Key Insights:

  • Novel insights into electronic and nuclear motions are revealed.
  • These techniques offer a deeper understanding of molecular behavior.
  • Experimental and theoretical progress is rapidly advancing.

Outlook:

  • This issue surveys recent experimental and theoretical progress.
  • It serves as a valuable resource for experts.
  • It introduces newcomers to nonlinear spectroscopy.