Порівняння методів
Переглядайте обрані методи поруч; рядки з відмінностями підсвічено.
| HSQC× | ЯМР спін-ехо× | |
|---|---|---|
| Галузь | Спектроскопія | Спектроскопія |
| Родина | Process / pipeline | Process / pipeline |
| Рік появи≠ | 1980 | 1950 |
| Автор методу≠ | Anil Kumar | Erwin Hahn |
| Тип≠ | Heteronuclear correlation sequence | Spectroscopic pulse sequence |
| Основоположне джерело≠ | Bodenhausen, G., & Ruben, D. J. (1981). Natural abundance nitrogen-15 NMR by enhanced heteronuclear spectroscopy. Chemical Physics Letters, 69(2), 185-189. DOI ↗ | Hahn, E. L. (1950). Spin echoes. Physical Review, 80(4), 580-594. DOI ↗ |
| Інші назви≠ | HSQC NMR, 1H-13C HSQC, heteronuclear correlation | CPMG pulse sequence, spin-echo NMR |
| Пов'язані | 4 | 4 |
| Підсумок≠ | Heteronuclear Single-Quantum Coherence (HSQC) is a 2D NMR technique that correlates proton and carbon-13 (or other heteronuclei) chemical shifts through one-bond coupling constants (1JHX). Developed in the early 1980s, HSQC rapidly became the workhorse of structural chemistry because it directly maps which carbons bear which protons, providing a comprehensive view of carbon skeleton connectivity and substitution patterns. | The spin-echo is a fundamental nuclear magnetic resonance (NMR) pulse sequence technique introduced by Erwin Hahn in 1950. It uses a 90-degree radiofrequency pulse followed by a 180-degree refocusing pulse to create an echo, effectively reversing the effects of magnetic field inhomogeneities and allowing accurate measurement of spin relaxation properties. This technique is essential in modern NMR spectroscopy for both one-dimensional and multidimensional experiments. |
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