Abstract: The complete structure of a molecule of interest is determined from a single NMR experiment utilizing a single NMR pulse sequence. The experiment utilizes the same pulse sequence for acquiring various one-dimensional and multi-dimensional spectra, with independent receivers tuned to individual resonance frequencies.

Abstract: The complete structure of a molecule of interest is determined from a single NMR experiment utilizing a single NMR pulse sequence. The experiment utilizes the same pulse sequence for acquiring various one-dimensional and multi-dimensional spectra, with independent receivers tuned to individual resonance frequencies.

Abstract: Cycling sidebands arising from broadband decoupling of I-S heteronuclei are separated from the decoupled I spectra investigated in a 2D pulse sequence wherein I excitation 50 is followed after the interval ?+t1 with refocusing ? pulse 54 operating on the I spins. After I excitation 50, the JIS coupling is inverted by ? pulse 52 and immediately following the ? pulse 54, decoupling 56 is turned on and maintained while signal acquisition in the interval t2 is initiated at ?+t1 after pulse 54. Double FT yields a 2D spectrum with sidebands completely displaced to diagonal locii, or alternatively the time domain data may be accumulated into respective t2 locations by effectively summing over t1 to yield a single dimensional spectrum free of cycling sidebands.

Abstract: Cycling sidebands arising from broadband decoupling of I-S heteronuclei are separated from the decoupled I spectra investigated in a 2D pulse sequence wherein I excitation 50 is followed after the interval &dgr;+t1 with refocusing &pgr; pulse 54 operating on the I spins. After I excitation 50, the JIS coupling is inverted by &pgr; pulse 52 and immediately following the &pgr; pulse 54, decoupling 56 is turned on and maintained while signal acquisition in the interval t2 is initiated at &dgr;+t1 after pulse 54. Double FT yields a 2D spectrum with sidebands completely displaced to diagonal locii, or alternatively the time domain data may be accumulated into respective t2 locations by effectively summing over t1 to yield a single dimensional spectrum free of cycling sidebands.

Abstract: An inversion pulse for wideband application is obtained from a simple nonlinear amplitude modulation wherein the amplitude is modulated in accord with A(t)=A.sub.0 {1-.vertline. sin .beta.t.vertline..sup.n } and the entire pulse is frequency modulated such that the phase varies as .phi.(t)=.phi..sub.0 +1/2 kt.sup.2.