Measurement principle of spectroscopy in which spectra are recorded at different magnitudes of an applied external perturbation of the sample and are processed to yield a
2-D correlation spectrum.
Notes: - The external perturbation may be time dependent (chemical reactions, physical relaxation processes), or static (temperature change, concentration change).
- Correlation spectroscopy is used in infrared spectroscopy, nuclear magnetic resonance spectroscopy (COSY, TOCSY), fluorescence spectroscopy and others.
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 677 (https://doi.org/10.1515/pac-2019-0203)