Related Experiment Video
Updated: Aug 18, 2026

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
Published on: September 12, 2014
Photophysical property of sanguinarine in the excited singlet state
1Biophysical Chemistry Laboratory, Indian Institute of Chemical Biology, Calcutta.
Abstract:
The photophysical property of the alkanolamine form of sanguinarine has been studied in aqueous and organic medium under various environmental conditions from the measurement of absorption, fluorescence and NMR spectroscopy. Alkanolamine fluorescence shows an excitation time dependent fluorescence quenching and the rate of quenching increases significantly with increasing pH and concentration of the species, while it decreases with increasing temperature. This phenomenon is explained by excited state intramolecular proton transfer from a 6-OH group to the lone pair of nitrogen through the formation of zwitterion.
More Related Videos
11:51Engineering 'Golden' Fluorescence by Selective Pressure Incorporation of Non-canonical Amino Acids and Protein Analysis by Mass Spectrometry and Fluorescence
Published on: April 27, 2018
08:25Inactivation of Pathogens via Visible-Light Photolysis of Riboflavin-5′-Phosphate
Published on: April 6, 2022
Related Concept Videos
UV–Vis Spectroscopy of Conjugated Systems
One of the factors influencing λmax is the extent of conjugation in the...
Molecular Spectroscopy: Absorption and Emission
UV–Vis Spectroscopy: Molecular Electronic Transitions
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
Variables Affecting Phosphorescence and Fluorescence
Deactivation Processes: Jablonski Diagram