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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

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Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and signal-to-noise ratio for the analyte. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.
Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called collision-induced...
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UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

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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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Mass Analyzers: Common Types01:19

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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Mass Analyzers: Overview01:13

Mass Analyzers: Overview

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The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
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Multidimensional electronic spectroscopy in high-definition-Combining spectral, temporal, and spatial resolutions.

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Spatially resolved multidimensional electronic spectroscopy overcomes ensemble averaging limitations. This technique provides unprecedented insights into molecular-scale phenomena by combining temporal, spectral, and spatial information.

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Area of Science:

  • Coherent multidimensional spectroscopy
  • Molecular-scale phenomena
  • Spectroscopic imaging

Background:

  • Coherent multidimensional spectroscopies (CMD) have advanced significantly across various electromagnetic spectrum regions.
  • CMD provides insights into energy/charge delocalization, hydrogen bonding, and light-matter interactions.
  • Ensemble measurements average crucial details like morphological and energetic inhomogeneity.

Purpose of the Study:

  • To discuss technological advancements enabling spatially resolved CMD.
  • To highlight recent findings from spatially resolved CMD.
  • To showcase the potential of overcoming ensemble averaging limitations.

Main Methods:

  • Implementation of coherent excitation with few-cycle pulses.
  • Spectral decongestion across multiple spectral dimensions.
  • Extension of CMD to provide diffraction-limited spatial resolution.

Main Results:

  • Enabled new insights into light-harvesting systems and hydrogen bonding dynamics.
  • Demonstrated the capability to resolve inhomogeneous broadening.
  • Paved the way for addressing challenging questions beyond ensemble averaging.

Conclusions:

  • Spatially resolved CMD is a powerful tool for detailed molecular analysis.
  • Technological developments have made this technique accessible.
  • Future research will benefit from the spatial resolution in spectroscopic studies.