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Infrared spectroscopy (IR spectroscopy) is the subset of spectroscopy that deals with the infrared region of the electromagnetic spectrum. It covers a range of techniques, with the most common type by far being a form of absorption spectroscopy. As with all spectroscopic techniques, it can be used to identify a compound and to investigate the composition of a sample.
For further details, see the links to the left of this answer.
Wiki User
∙ 16y ago
Wiki User
∙ 14y agoInfrared spectroscopy, or IR spectroscopy, is a method of spectroscopy used by organic chemists to help determine the structure of an unknown molecule. An IR spectrum will have peaks based on how much light was visible when shone through different parts of the molecule. The peaks' wavelengths correspond to different functional groups. For example, a broad peak between 3200 and 3600 cm-1 indicates the presence of an alcohol, or OH functional group. Another distinctive peak is the carbonyl peak, which will show up between approximately 1650 cm-1 and 1800 cm-1 depending on which functional group the carbonyl is forming. Primary amines form a distinctive double peak between 3300 and 3500 cm-1.
IR spectra are very complex, and even experienced chemists will often be unable to explain with certainty every single peak appearing in any given spectrum. IR spectra are most effective in determining the structure of an unknown molecule when used in conjunction with NMR spectra.
Wiki User
∙ 7y agoThe principle is to measure infrared radiation absorption at different wavelengths; IR spectra are different for each material or compound.
Wiki User
∙ 12y agoI'm not sure. soz -.-
Wiki User
∙ 12y agoInfra-red spectroscopy
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What are the weaknesses of infrared spectroscopy?
Infrared spectroscopy cannot be used quantitatively. The sample preparation is also complex. It may be robust as the sample preparation may affect its results.
Is potassium fluoride IR active?
Potassium fluoride isn't used in infrared spectroscopy.
What are the strengths of infrared spectroscopy?
Infrared spectroscopy is capable of providing a complex fingerprint region which is unique to the compound being examined. This allows the compound to be identified by matching its sample spectrum to the standard. Computer control of instruments also allows this to be readily carried out.
What is the difference ultraviolet and infrared spectroscopy?
FTIR spectroscopy cannot be used to detect all the vibration modes in a molecule. It can be used only to study the non-symmetrical vibrational state in an atom. Using Raman Spectroscopy one can study the symmetric stretch of the atom. For example the symmetric stretch of CO2 which cannot be studied by FTIR can be studied by Raman Spectroscopy. Here the permanent dipole moment of the molecule during a vibrational cycle does not change as it does not involve polarization. As a result, this mode cannot absorb infrared radiation. In many instances, vibrational modes that are not observed by infrared absorption can be studied by Raman spectroscopy as it is the result of inelastic collisions between photons and molecules
Why use KBr in FTIR?
The crystal has no visible peaks in the infrared spectrum making it transparent in ftir.
What has the author Peter R Griffiths written?
Peter R. Griffiths has written: 'Fourier transform infrared spectrometry' -- subject(s): Fourier transform infrared spectroscopy 'Chemical infrared Fourier transform spectroscopy' -- subject(s): Fourier transform spectroscopy, Infrared spectroscopy
Where can one find information about infrared spectroscopy?
Infrared spectroscopy applications include pharmaceutical, food quality control, elite sports training, and neonatal research. More information can be found on infrared spectroscopy on its wikipedia page.
Principle of infrared spectroscopy?
wavelenth mesured wavenoumber
What has the author Martina Havenith-Newen written?
Martina Havenith-Newen has written: 'Infrared spectroscopy of molecular clusters' -- subject(s): Intermolecular forces, Infrared spectroscopy
What are the weaknesses of infrared spectroscopy?
Infrared spectroscopy cannot be used quantitatively. The sample preparation is also complex. It may be robust as the sample preparation may affect its results.
What has the author S Wartewig written?
S. Wartewig has written: 'IR and Raman spectroscopy' -- subject(s): Infrared spectroscopy, Raman spectroscopy
Do ultraviolet spectroscopy and infrared spectroscopy involve electromagnetic radiation in their operation?
Yes. All light is a form of electromagnetic radiation, so this answer applies to all light spectroscopy.
Identify the type of energy transition occurring in a molecule that causes a band to appear in an infrared spectrum?
Infrared Spectroscopy
How the method is used stellar spectroscopy?
The method is the spectrography.
What has the author M Avram written?
M. Avram has written: 'Infrared spectroscopy'
How do you determine the moisture content in cocoa bean?
use near-infrared spectroscopy
What has the author R A Reed written?
R. A. Reed has written: 'Infrared measurements of a scramjet exhaust' -- subject(s): Airplanes, Jet propulsion, Infrared spetroscopy, Infrared spectroscopy
