08439 IUPAC Gold Book - two-dimensional nuclear magnetic resonance spectroscopy 10.1351/goldbook.08439 08439 current synonym: 2-D NMR 1 Measurement method of nuclear magnetic resonance spectroscopy in which data are collected in two time domains: acquisition of the free induction decay (\(t_{2}\)) and a successively incremented delay (\(t_{1}\)). The resulting data matrix is subjected to two successive Fourier transforms to produce a spectrum with two frequency axes, usually either chemical shift/chemical shift (correlation spectroscopy) or chemical shift/J-coupling (see J-resolved spectroscopy). J-resolved spectroscopy https://goldbook.iupac.org//terms/view/08373 free induction decay https://goldbook.iupac.org//terms/view/08249 nuclear magnetic resonance spectroscopy https://goldbook.iupac.org//terms/view/08218 spectrum https://goldbook.iupac.org//terms/view/08384 time domains https://goldbook.iupac.org//terms/view/08433 PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 710 (https://doi.org/10.1515/pac-2019-0203) https://goldbook.iupac.org/terms/view/08439/html https://goldbook.iupac.org/terms/view/08439/json https://goldbook.iupac.org/terms/view/08439/plain Citation: 'two-dimensional nuclear magnetic resonance spectroscopy' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.08439 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-05-30T14:57:49+00:00