เปรียบเทียบวิธี

	เทคนิคสปิน-เอคโคของ NMR	HSQC
สาขาวิชา	สเปกโทรสโกปี	สเปกโทรสโกปี
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1950	1980
ผู้ริเริ่ม	Erwin Hahn	Anil Kumar
ประเภท	Spectroscopic pulse sequence	Heteronuclear correlation sequence
แหล่งต้นตำรับ	Hahn, E. L. (1950). Spin echoes. Physical Review, 80(4), 580-594.	Bodenhausen, G., & Ruben, D. J. (1981). Natural abundance nitrogen-15 NMR by enhanced heteronuclear spectroscopy. Chemical Physics Letters, 69(2), 185-189.
ชื่อเรียกอื่น	CPMG pulse sequence, spin-echo NMR	HSQC NMR, 1H-13C HSQC, heteronuclear correlation
ที่เกี่ยวข้อง	4	4
สรุป	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.	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.