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What is laser raman spectroscopy?
Raman spectroscopy is the vibrational spectroscopy. The ancient days the scientist use sunlight as a source for getting spectrum.but the modern world, the scientist use high energy laser for characterisation.so, it is called laser raman spectroscopy.
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
What is the effect of hydrogen bonding on vibrational frequencies in case of IR spectroscopy?
Hydrogen bonding results in the broadening of the stretching frequencies of functional groups like -OH, -NH, -COOH etc.
Frank condon principle?
The Frank-Condon Principle states that transitions between electronic states correspond to vertical lines on an energy vs. internuclear distance diagram. The basis of this principle is that electronic transitions happen on a timescale that is significantly smaller than the vibrational period of a given molecule and therefore the distance at which they happen can be assumed to be fixed during the transition. This is significant for spectroscopy because the most intense spectral lines will correspond to transitions to the vibrational state in the upper electronic state that have the most overlap with the ground vibrational state in the lower electronic state. (From Thomas Engel's Quantum Chemistry and Spectroscopy)
Can be visible or infrared?
I can't think of anything that could be those two and nothing but those two. Electronic structure spectroscopy is generally in the UV/Visible band, but I suppose it could extend down into the near IR. Vibrational spectroscopy (with rotational fine structure) is in the IR, but doesn't make it up into the visible region.
What has the author David I Bower written?
David I. Bower has written: 'The vibrational spectroscopy of polymers' -- subject(s): Analysis, Polymers, Vibrational spectra
What has the author Marek W Urban written?
Marek W. Urban has written: 'Vibrational spectroscopy of molecules and macromolecules on surfaces' -- subject(s): Surface chemistry, Vibrational spectra 'Attenuated Total Reflectance Spectroscopy of Polymers' -- subject(s): Surfaces, Polymers, Reflectance spectroscopy, Analysis
What is Raman Spectroscopy?
Raman Spectroscopy is a spectroscopic technique in condensed matter physics and chemistry. It studies vibrational, rotational & low-frequency modes in systems.
What has the author N Kirov written?
N. Kirov has written: 'Vibrational spectroscopy of liquid crystals' -- subject(s): Analysis, Liquid crystals, Vibrational spectra
What has the author L A Woodward written?
L. A. Woodward has written: 'Introduction to the theory of molecular vibrations and vibrational spectroscopy' -- subject(s): Molecular spectroscopy, Vibrational spectra 'Molecular statistics for students of chemistry' -- subject(s): Mathematical statistics, Molecular theory
What is laser raman spectroscopy?
Raman spectroscopy is the vibrational spectroscopy. The ancient days the scientist use sunlight as a source for getting spectrum.but the modern world, the scientist use high energy laser for characterisation.so, it is called laser raman spectroscopy.
What has the author Llewellyn H Jones written?
Llewellyn H. Jones has written: 'Inorganic vibrational spectroscopy' -- subject(s): Chemical bonds, Inorganic Chemistry, Vibrational spectra
What has the author Zhimei Jiang written?
Zhimei Jiang has written: 'Structural investigations of layered silicates by vibrational spectroscopy'
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
What has the author Sergey A Astakhov written?
Sergey A. Astakhov has written: 'Theory and methods of computational vibronic spectroscopy' -- subject(s): Data processing, Molecular spectroscopy, Vibrational spectra, Computational complexity
What has the author Frederick C Wharton written?
Frederick C. Wharton has written: 'Vibrational spectroscopy of some inorganic cyanides, isocyanides and cyanates'
What has the author Christopher Mervyn Woodman written?
Christopher Mervyn Woodman has written: 'Some studies in nuclear magnetic resonance and vibrational spectroscopy'
