2013
Label: Hands Productions - D196 • Format: CD Album • Country: Germany • Genre: Electronic • Style: Rhythmic Noise, Techno, IDM, Glitch
Molecular Vibration - Shorai - Interference (CD, Album)

Molecular vibrations: the theory of infrared and Raman vibrational spectra Item Preview remove-circle Share or Embed This Item. Share to Twitter. Share to Facebook. Share to Reddit. Share to Tumblr. Share to Pinterest. Share via Interaction Count:

Hence, as a whole, molecules vibrate. Molecular vibration can be considered to be like the motion of particles connected by springs. Consider a molecule consisting of N atoms with mass mα (α is the numbering of the atoms). The displacements of atoms are Δx α .

A molecular vibration is a periodic motion of the atoms of a molecule relative to each other, such that the center of mass of the molecule remains unchanged. The typical vibrational frequencies range from less than Hz to approximately Hz, corresponding to wavenumbers of approximately to cm−1 and wavelengths of approximately 30 to 3 µm. Vibrations of polyatomic molecules are .

caused by molecular vibrations of molecules or groups of atoms and the combined discrete energy transitions and changes of frequen-cies during absorption (IR) or scattering (Raman) of electromag-netic radiation of wavelengths from 1 to µm (selection rules). One can get/detect: • the presence of known compounds (finger print).

 · When we begin to add more atoms the number of possible vibrations increases and more fundamental bands are observed. The total number of possible vibrations for a molecule is equal to 3N-6 (3N-5 for a linear molecule) where N is equal to the number atoms in the molecule. However, not all of these vibrations will be IR active.


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