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Related Concept Videos

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

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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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UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
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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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UV–Vis Spectroscopy of Conjugated Systems01:32

UV–Vis Spectroscopy of Conjugated Systems

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Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent...
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UV–Vis Spectrum01:30

UV–Vis Spectrum

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When light passes through a substance, a portion of the light is absorbed while the remaining light is reflected or transmitted. If the molecule absorbs light between the wavelengths of 180–400 nm range, the UV spectrum is obtained, and if it absorbs light in the 400–780 nm wavelength range, the visible spectrum is obtained.     
The UV–Vis spectrum of a molecule is the plot of its absorbance versus wavelength. The plot is drawn by taking molar...
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Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

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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...
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Simultaneous UV/vis Absorption in Parallel Configuration, Photoluminescence and Raman Spectroelectrochemistry.

Fabiola Olmo1, Martin Perez-Estebanez1, Aranzazu Heras1

  • 1Department of Chemistry, Universidad de Burgos, Pza. Misael Bañuelos s/n, E-09001, Burgos, Spain.

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Summary
This summary is machine-generated.

This study introduces a novel analytical technique combining UV/vis absorption, photoluminescence, Raman spectroscopy, and electrochemistry for comprehensive chemical analysis. This multi-signal approach provides richer insights into chemical systems compared to single methods.

Keywords:
EC-SERSRamanUV/vis absorptionphotoluminescencespectroelectrochemistry

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Electrochemistry

Background:

  • Advanced analytical techniques are crucial for comprehensive chemical system analysis.
  • Combining multiple spectroscopic methods with electrochemistry offers diverse information.
  • New techniques are needed to enhance the understanding of chemical reactions.

Purpose of the Study:

  • To propose and demonstrate a new combined analytical technique.
  • To integrate UV/vis absorption, photoluminescence, and Raman spectroscopy with electrochemistry.
  • To showcase the benefits of simultaneous multi-signal acquisition.

Main Methods:

  • Developed a novel hyphenated technique combining three spectroscopic methods (UV/vis, photoluminescence, Raman) with electrochemistry.
  • Utilized a parallel configuration for UV/vis absorption spectroscopy.
  • Applied the technique to analyze tris-(2,2' bipyridine)-ruthenium-(II) and ofloxacin systems.

Main Results:

  • Successfully demonstrated the simultaneous acquisition of multiple analytical signals.
  • Observed distinct behaviors of tris-(2,2' bipyridine)-ruthenium-(II) and ofloxacin during electrochemical processes.
  • Highlighted the advantages of integrated spectroscopic and electrochemical analysis.

Conclusions:

  • The proposed combined technique offers a powerful approach for detailed chemical analysis.
  • Simultaneous multi-signal detection provides superior information compared to individual methods.
  • This integrated method enhances the study of complex chemical systems and reactions.