Related Experiment Video
Updated: Jun 28, 2026

Inactivation of Pathogens via Visible-Light Photolysis of Riboflavin-5′-Phosphate
Published on: April 6, 2022
Infrared study of chlorophenols and products of their photodegradation
1Institute of Non-Ferrous Metals, 44-100 Gliwice, 5 Sowinskiego Str., Poland; Centre of Polymer Chemistry PAS, 41-819 Zabrze, 34M. Skłodowskiej-Curie Str., Poland.
Abstract:
The presents study of the 3-chlorophenol, 2,4-dichlorophenol, 2,3,4,5-tetrachlorophenol, pentachlorophenol and products of their photodegradation using FT-IR spectroscopy and GC/MS. Spectra of pure chlorophenols with the spectra of their solutions after photodegradation were compared. FT-IR spectra of pure chlorophenols investigated in the region of 3700-3000cm(-1) show that in particular cases the position and shape of bands corresponding to stretching vibration of hydroxyl groups are different. In all cases, the differences between spectra of pure chlorophenols and irradiated solutions were observed. It was confirmed that different distribution of types of hydrogen bonds appearing in particular chlorophenols has strong influence on the process of irradiation reaction and final products.
Related Concept Videos
Infrared (IR) Spectroscopy: Overview
Different compounds display unique properties due to their...
IR and UV–Vis Spectroscopy of Aldehydes and Ketones
Oxidation of Phenols to Quinones
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox property is crucial in...
Applications of IR Spectroscopy: Overview
IR and UV–Vis Spectroscopy of Carboxylic Acids
However, the stretching absorptions for the C=O bond vary depending on the structure of carboxylic acids. The C=O bond of the free carboxylic acids shows a higher stretching frequency, 1760 cm−1, while H-bonded carboxylic acids (dimers) exhibit stretching absorptions at a lower frequency, 1710 cm−1. The C=O bond of the...
IR Spectrum
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0% (complete...

