Bandingkan metode

	COSY	Spektroskopi ATR-FTIR	Gema Putaran NMR
Bidang	Spektroskopi	Spektroskopi	Spektroskopi
Keluarga	Process / pipeline	Process / pipeline	Process / pipeline
Tahun asal	1976	1961	1950
Pencetus	Wüthrich Kurt	Joop Fahrenfort	Erwin Hahn
Tipe	Two-dimensional pulse sequence	Vibrational spectroscopy technique	Spectroscopic pulse sequence
Sumber perintis	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.	Harrick, N. J. (1960). Study of physics of internal reflection from metals. Journal of Physics and Chemistry of Solids, 13(2), 143-155.	Hahn, E. L. (1950). Spin echoes. Physical Review, 80(4), 580-594.
Alias	COSY NMR, 2D COSY, 1H-1H COSY	ATR-IR, attenuated total reflectance, FTIR spectroscopy	CPMG pulse sequence, spin-echo NMR
Terkait	4	3	4
Ringkasan	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.	Attenuated Total Reflectance (ATR) Fourier Transform Infrared (FTIR) spectroscopy is a variant of conventional FTIR that measures infrared absorption through evanescent-wave interrogation of samples in direct contact with a high-refractive-index crystal. Developed by Harrick and Fahrenfort in the 1960s, ATR-FTIR is now the dominant form of FTIR spectroscopy, enabling rapid, non-destructive characterization of organic compounds, polymers, coatings, and biological materials without extensive sample preparation.	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.