Related Experiment Video
Updated: Apr 13, 2026

Author Spotlight: Eco-friendly Photoluminescent Textile Authentication with Curcumin
Published on: December 22, 2023
Flavonoids from Curcuma longa leaves and their NMR assignments
Abstract:
Chemical investigation of the n-BuOH-soluble fraction of the EtOH extract of the aerial part of Curcuma longa led to the isolation of 11 flavonol glycosides and one dihydroflavonol glucoside (1) via chromatography over Sephadex LH-20 and Lobar RP-18 columns. Although they are known, the 1H and 13C NMR data recorded in CD3OD rather than the common DMSO-d6 are doubly checked via extensive 2D NMR spectroscopic analyses, leading to some revisions of the reported data, especially for the glycon part.
Related Concept Videos
NMR Spectroscopy of Aromatic Compounds
NMR Spectroscopy of Benzene Derivatives
¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR
NMR Spectroscopy: Chemical Shift Overview
For instance, the proton...
Raman Spectroscopy: Overview
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
NMR Spectroscopy Of Amines

