Nicolet Avatar 380 FT-IR:
Infrared Spectroscopy
Purchased in Fall of 2005, the Avatar 380 FTIR provides undergraduates with a research-quality FTIR. This system provides high resolution (up to 0.5 cm-1) and has CsI optics that allow inorganic students to observe metal-ligand bonds.
What is FT-IR Spectroscopy?
FT-IR stands for Fourier Transform Infra-Red Spectroscopy. IR spectroscopy is a very simple technique. As infrared light hits the sample, it is absorbed much like in the UV region. Unlike in UV spectroscopy, the molecule must experience a change to the dipole moment as it absorbs the light. The energy causes either a vibration or rotation in a bond, which we see in the IR spectrum. Each peak in represents a specific stretch, bend, or rotation in the molecule. Some very intensely seen peaks are due to O-H, N-H, C=C and C=O stretches. Peaks are not seen for N2 or O2, because these bonds do not feel a net change in dipole as a result of their vibration
There are oftentimes many peaks corresponding to the same bond in a molecule. This is because the bond can vibrate in many different ways that induce a change to the dipole moment (or are "IR active").
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