## Abstract After a brief theoretical description, new gradient‐selected, proton‐detected heteronuclear correlation sequences are introduced. The gs‐HMBC and gs‐Relayed‐HMQC are closely related to the original gs‐HMQC proposed by Hurd and John. A new approach to obtain pure absorption line shapes i
Gradient- and Sensitivity-Enhanced Heteronuclear Multiple-Quantum Correlation Spectroscopy
✍ Scribed by Guang Zhu; Xiangming Kong; Konghong Sze
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 84 KB
- Volume
- 135
- Category
- Article
- ISSN
- 1090-7807
No coin nor oath required. For personal study only.
✦ Synopsis
A gradient-and sensitivity-enhanced HMQC experiment has been developed. The sensitivity of the experiment is increased by factors of ͌ 2 and 2 over the conventional and gradient-enhanced HMQC experiments, respectively. This improvement is achieved by retaining both the x and the y magnetization components in the indirectly detected dimension. This experiment will be particularly useful in NMR studies of large biomolecules as the relaxation time of the multiple-quantum coherence is much longer than that of the singlequantum coherence in the slow motion limit.
📜 SIMILAR VOLUMES
A further refinement of the recently reported IMPEACH-MBC long-range heteronuclear shift correlation experiment is described. The new experiment, CIGAR-HMBC (constant time inverse-detected gradient accordion rescaled long-range heteronuclear multiple bond correlation), modifies the constant time var
Heteronuclear carbon-phosphorus chemical shift correlation via heteronuclear multiple quantum coherence is described. Enhanced sensitivity is afforded by inverse detection of 31P rather than the much less abundant 13C spin. Correlations via 'J(CP) and "J(CP), where n = 2, 3, are observable with mino
## Abstract It is demonstrated that the Müller and Bolton type of multiple‐quantum heteronuclear shift correlation is a promising tool for stereosequence assignments of polymers. Slight modification of the basic MQ pulse sequence results in a 2–3‐fold gain in sensitivity compared with the conventio
New pulse sequences for two-dimensional phase-sensitive detection of heteronuclear zero- and double-quantum coherence are presented for use with and without pulsed field gradients. The magnetization is phase modulated during t1 and then transferred to a proton for detection using a novel approach si