Related Experiment Video
Updated: Nov 5, 2025
15:04
Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy
Published on: May 18, 2011
13.3K
Raman spectroscopy in cultural heritage: Background paper
Summary
Raman spectroscopy offers a non-destructive method for analyzing artists' materials. This technique provides rapid molecular identification, acting as a unique fingerprint for materials when compared against a spectral database.
Area of Science:
- Analytical Chemistry
- Materials Science
- Art Conservation Science
Background:
- Raman spectroscopy has been a vital analytical technique for over 30 years.
- It is frequently employed for the analysis of diverse artists' materials.
- The method is valued for its non-destructive and non-invasive nature.
Purpose of the Study:
- To highlight the significance of Raman spectroscopy in analyzing artists' materials.
- To explain the principle of Raman spectroscopy for molecular identification.
- To underscore its utility in compound identification through spectral fingerprinting.
Main Methods:
- Utilizing the Raman effect for molecular analysis.
- Performing non-destructive and non-invasive examinations of materials.
- Comparing obtained Raman spectra with a database of standard spectra.
Main Results:
- Raman spectroscopy enables quick and straightforward molecular identification.
- The technique provides a unique spectral fingerprint for each material.
- Successful compound identification is achieved through spectral database comparison.
Conclusions:
- Raman spectroscopy is an indispensable tool in the analysis of artists' materials.
- The method's ability to provide molecular fingerprints facilitates material identification.
- Its non-destructive nature makes it ideal for the conservation and study of artworks.
Related Concept Videos
01:20Raman Spectroscopy: Overview
860
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...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
860
01:26Raman Spectroscopy Instrumentation: Overview
617
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...
617
01:11Applications of IR Spectroscopy: Overview
1.6K
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,...
1.6K
01:24IR Spectroscopy: Molecular Vibration Overview
3.6K
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.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
3.6K
01:14NMR Spectroscopy of Aromatic Compounds
5.4K
Aromatic compounds can be identified or analyzed using proton NMR and carbon‐13 NMR. Typically, aromatic hydrogens or hydrogens directly bonded to the aromatic rings are strongly deshielded by the aromatic ring current. Therefore, they absorb in the range of 6.5–8.0 ppm in proton NMR spectra. For instance, aromatic hydrogens directly bonded to the benzene ring absorb at 7.3 ppm. However, aromatic hydrogens of larger rings absorb farther upfield or downfield than the ideal range.
5.4K
01:26Spectroscopy of Carboxylic Acid Derivatives
2.7K
Infrared spectroscopy is primarily used to determine the types of bonds and functional groups. In carboxylic acid derivatives, a typical carbonyl bond absorption is observed around 1650–1850 cm−1. For esters, the absorption is recorded at around 1740 cm−1, while acid halides show the absorption at about 1800 cm−1. Another acid derivative, the acid anhydrides, exhibit two carbonyl absorption around 1760 cm−1 and 1820 cm−1, arising from the symmetrical and...
2.7K