So sánh phương pháp
Xem các phương pháp đã chọn cạnh nhau; những hàng khác biệt được làm nổi bật.
| Tán xạ Spin-Echo NMR× | COSY× | |
|---|---|---|
| Lĩnh vực | Quang phổ học | Quang phổ học |
| Họ | Process / pipeline | Process / pipeline |
| Năm ra đời≠ | 1950 | 1976 |
| Người khởi xướng≠ | Erwin Hahn | Wüthrich Kurt |
| Loại≠ | Spectroscopic pulse sequence | Two-dimensional pulse sequence |
| Công trình gốc≠ | Hahn, E. L. (1950). Spin echoes. Physical Review, 80(4), 580-594. DOI ↗ | Aue, W. P., Bartholdi, E., & Ernst, R. R. (1976). Two-dimensional spectroscopy. Application to nuclear magnetic resonance. The Journal of Chemical Physics, 64(5), 2229-2246. DOI ↗ |
| Tên gọi khác≠ | CPMG pulse sequence, spin-echo NMR | COSY NMR, 2D COSY, 1H-1H COSY |
| Liên quan | 4 | 4 |
| Tóm tắt≠ | 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. | Correlation Spectroscopy (COSY) is a two-dimensional NMR technique that correlates proton chemical shifts through scalar coupling (J-coupling), revealing which protons are magnetically coupled and hence bonded through multiple bonds. Developed by Aue, Bartholdi, and Ernst in 1976, COSY became one of the most important tools in structural elucidation, enabling chemists to map out proton connectivity patterns and deduce molecular topology without isotopic labeling. |
| ScholarGateBộ dữ liệu ↗ |
|
|