AMRITA SHETTY

  Infrared Spectroscopy: Introduction and classification of Infrared radiation (IR) By Amrita Shetty, 10 June 2021 Infrared spectroscopy is Spectroscopy study deal with the absorption of infrared radiation of electromagnetic spectrum by molecule. Mostly used by organic and inorganic chemist. IR spectrum gives sufficient information about the · Structure (identification of functional groups) of a compound. · Assess the purity of a compound. It is also known as vibrational-rotational spectroscopy is the absorption of infrared radiation by a molecule causes changes in their vibrational and rotational energy levels. IR spectrum is divided into 3 main categories: · · Far infrared (<400 cm −1 ) · Mid-infrared (4000–400 −1 ) · Near-infrared (13000–4000 cm −1 ) Mid IR spectrum is often used by chemist to identify organic molecule. Mid IR region are divided to two group.  Functional group region in which most of the functional groups present in organic molecules  exhibits absorption