Related Experiment Video
Updated: Jul 2, 2026
09:57
Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems
Published on: February 10, 2020
Electro-optical multichannel spectrometer for transient resonance Raman and absorption spectroscopy
K B Hansen1, R Wilbrandt, P Pagsberg
1Riso National Laboratory, DK-4000 Roskilde, Denmark.
The Review of Scientific Instruments
|December 1, 1979
Summary
A new optical multichannel system analyzes short-lived species using time-dependent absorption and resonance Raman spectroscopy. This advanced system captures transient absorption and Raman spectra with high temporal resolution.
Area of Science:
- Spectroscopy
- Physical Chemistry
- Chemical Physics
Background:
- Studying transient species is crucial for understanding chemical reactions.
- Existing methods for analyzing short-lived species have limitations in time resolution and spectral range.
Purpose of the Study:
- To describe a novel optical multichannel system for time-resolved spectroscopy.
- To enable the study of short-lived transient species in gas and liquid phases.
Main Methods:
- Utilized an optical multichannel system featuring an image converter streak unit or image intensifier.
- Coupled the optical system to a TV camera with computerized data handling.
- Applied the system to pulse radiolysis experiments for absorption and resonance Raman spectroscopy.
Main Results:
- Successfully recorded time-dependent absorption spectra of transient species.
- Enabled resonance Raman spectroscopy of short-lived radicals and excited states.
- Achieved high temporal resolution for analyzing species generated by single electron and light pulses.
Conclusions:
- The developed optical multichannel system is effective for time-resolved absorption and resonance Raman spectroscopy.
- The system provides a powerful tool for investigating the dynamics of short-lived chemical species.
- This technology advances the study of transient phenomena in pulse radiolysis.
Related Concept Videos
01:26Raman Spectroscopy Instrumentation: Overview
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
01:26Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
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.
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.
01:20Raman Spectroscopy: Overview
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.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
01:16UV–Vis Spectroscopy: Molecular Electronic Transitions
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 process,...
01:14Molecular Spectroscopy: Absorption and Emission
Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels. Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
01:25IR Spectrometers
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...