Spectroscopy: Studying the properties of matter through its interaction with different frequency components of the electromagnetic spectrum. Spectroscopy: Studies the light absorbing properties of matter. Since each compound has its unique molecular or ionic structure, its light absorbing properties will also be unique. A quick method to obtain a lot of information about a compound’s structure. Sometimes, with sufficient spectroscopic results, the compound’s structure can be completely determined. Spectroscopy is a general methodology that can be adapted in many ways to extract the information you need (energies of electronic, vibrational, rotational states, 4/4/2011 DR. ABD EL RAHEIM DONIA 1
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Different methods for structure elucidation. Spectroscopy: Studying the properties of matter through its interaction with different frequency components.
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D R . A B D E L RA H E I M D O N I A
•Different methods for structure elucidation.
Spectroscopy:
Studying the properties of matter through its interaction with different
frequency components of the electromagnetic spectrum.
Spectroscopy:
Studies the light absorbing properties of matter. Since each compound has
its unique molecular or ionic structure, its light absorbing properties will also be
unique. A quick method to obtain a lot of information about a compound’s structure.
Sometimes, with sufficient spectroscopic results, the compound’s structure can be
completely determined.
Spectroscopy is a general methodology that can be adapted in many ways to
extract the information you need (energies of electronic, vibrational, rotational
states, structure and symmetry of molecules, dynamic information).
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Dr. Abd El Raheim Donia
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Dr. Abd El Raheim Donia 34/4/2011
D R . A B D E L RA H E I M D O N I A
•Ultra Violet ( UV):
Ultraviolet light is electromagnetic radiation with a wavelength shorter than
that of visible light, but longer than X-rays, in the range 10 nm to 400 nm. It is so
named because the spectrum consists of electromagnetic waves with frequencies
higher than those that humans identify as the color violet.
These wavelengths of light cause electrons to be promoted to higher energy
orbitals. Thus, information about a molecule’s orbitals and bonding can be obtained.
•Microwave spectroscopy:
Microwaves cause molecules to rotate. In fact, the microwave oven works by
causing the fast rotation of water molecules. This rotational kinetic energy is