Reducing t1 noise through rapid scanning Perras, Frederic Pruski, Marek
dc.contributor.department Ames Laboratory
dc.contributor.department Chemistry 2019-08-19T06:34:44.000 2020-06-29T23:22:06Z 2020-06-29T23:22:06Z 2019-11-26 2018-11-26
dc.description.abstract <p>The so-called t1 noise, which arises due to random instabilities in the spectrometer hardware, remains the primary source of noise that limits the sensitivity of most 2D NMR experiments, particularly in the expanding group of solid-state NMR methods that utilize dipolar-recoupling. In this communication we revisit the relationship between the signal intensity and the t1 noise produced. It is shown that since the latter scales linearly with the signal strength, the use of a conventional relaxation delay of 1.3T1 may prove far from optimal. In cases where the fluctuations occur on a shorter timescale than the recycle delay, a considerably faster repetition rate should be used to maximize the time sensitivity in a 2D experiment than what is used to maximize the sensitivity in 1D. This is demonstrated with the acquisition of 1H{13C} Dipolar-mediated Heteronuclear Multiple-Quantum Correlation (D-HMQC) type spectra in which the sensitivity could be nearly doubled by choosing a very short relaxation delay corresponding to 0.2T1.</p>
dc.identifier archive/
dc.identifier.articleid 1312
dc.identifier.contextkey 14800772
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_manuscripts/302
dc.language.iso en
dc.relation.ispartofseries IS-J 9831
dc.source.bitstream archive/|||Fri Jan 14 23:28:26 UTC 2022
dc.source.uri 10.1016/j.jmr.2018.11.008
dc.subject.disciplines Materials Chemistry
dc.subject.disciplines Radiochemistry
dc.subject.keywords 2D NMR
dc.subject.keywords t1 noise
dc.subject.keywords Spin-lattice relaxation
dc.subject.keywords D-HMQC
dc.subject.keywords Solid-state NMR
dc.title Reducing t1 noise through rapid scanning
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
relation.isOrgUnitOfPublication 42864f6e-7a3d-4be3-8b5a-0ae3c3830a11
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