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Fourier Transform - Infrared Spectroscopy (FT-IR)

Bruker Optics - Vertex80v


Tool Manager: Teresa Porri

Infrared (IR) spectroscopy is a chemical analytical technique that detects the vibration characteristics of chemical functional groups in a sample. When infrared light interacts with a molecule, chemical bonds will stretch, contract and bend. As a result, chemical functional groups tends to adsorb infrared radiation in specific wavenumber ranges and thus can be used for molecular identification.

IR spectroscopy measures the infrared intensity versus wavelength (wavenumber) of light. Based upon the wavenumber, infrared light can be categorized as far infrared (4 ~ 400cm-1), mid infrared (400 ~ 4,000cm-1) and near infrared (4,000 ~ 14,000cm-1).

The NBTC has an advanced research FT-IR system, equiped with a mid-IR source and a nitrogen cooled MCT detector, allowing high sensitivity spectra to be aquired between ~ 450-7000cm-1. An diamond ATR crystal accessory for all kind of bulk samples is available as well as a variable grazing angle accessory with polarizer for characterization of thin films on reflective surfaces

The NBTC FT-IR is a Vertex80v, which is Bruker Optics most recent model. It has vacuum evacuated optics and an option to have a vacuum evacuated or nitrogen purged sample compartment in order to minimize backgrund adsorption from CO2 and H2O.

FTIR information:

V80v User Manual & Instructions (NBTC)

Vertex 80v product information (Bruker)

Miracle ATR accessory (PIKE)

VeeMAX II grazing angle accessory (PIKE)

Infrared Spectroscopy introduction (Wikipedia)

Guide to Infrared Spectroscopy (Bruker pdf)

Peak absorbtion tables (pdf)

Application Notes (PIKE Technologies website)

Interpretation of Infrared Spectra, A Practical Approach - J. Coates, from the Encycl. Anal. Chem.

FT-IR resources (Lawrence Berkeley Lab page with useful links)

FTIR Troubleshooting (pdf)

Offline analysis software
Opus file viewer (Bruker - for opening spectra)
KnowItAll (BioRad - spectral interpretation, free for academic users)
Spekwin32

This material is based upon work supported in part by the STC Program of the National Science Foundation under Agreement No. ECS-9876771. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
Any opininons, findings, conclusions or recommendations expressed are those of the author(s) and do not necessarily reflect the views of the New York State Office of Science, Technology and Academic Research.


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