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Shift correlation, heteronuclear accordion-optimized

To provide the means of sampling a wider range of potential long-range heteronuclear coupling constants, an alternative version of this heteronuclear shift correlation experiment is called the accordion-optimized HMBC, or ACCORD-HMBC [50]. Additional modifications of this experiment are also available [51]. [Pg.296]

The available accordion-optimized long-range heteronuclear shift correlation experiments were surveyed in a recent chapter. No novel accordion-optimized methods have been reported, but following the author s initial report on the advantages of using the IMPEACH-MBC sequence for long-range studies, Kline and Cheatham have... [Pg.5]

Accordion-optimized direct heteronuclear shift correlation methods 40... [Pg.37]

Accordion-optimized long-range heteronuclear shift correlation experiments... [Pg.61]

Nearly simultaneously with the report of the BIRD-HMBC experiment, Meissner and Sprensen described another modification of the basic long-range hetero-nuclear shift correlation experiment that they refer to as broadband HMBC. The authors employ the gradient dual-stage low-pass J-filter used in the accordion-optimized experiments described above (Section 3.3.5) followed by a delay. A, which replaces the accordion-optimized delay or a normal fixed delay for the evolution of long-range heteronuclear components of magnetization. Instead, Meissner and Sprensen acquire a series of several experiments with different... [Pg.81]

Accordion-optimized Direct Heteronuclear Shift Correlation Experiments... [Pg.239]

Accordion-optimized Long-range Heteronuclear Shift Correlation Methods. [Pg.244]

Fig. 8.28 The (/, -HMBC experiment is the most sophisticated accordion-optimized long-range heteronuclear shift correlation experiment reported to date [148]. The experiment uses a pulse sequence operator known as a STAR (selectively tailored F, accordion refocusing) to selectively manipulate two-bond and three-bond long-range correlations to protonated carbon or nitrogen resonances. A. STAR operator used in the (/, J-HMBC experiment. The experiment takes advantage of the ability of a BIRD(x,x,x) pulse to refocus the one-bond heteronuclear coupling of a protonated carbon. By doing this, the coupling to this proton... Fig. 8.28 The (/, -HMBC experiment is the most sophisticated accordion-optimized long-range heteronuclear shift correlation experiment reported to date [148]. The experiment uses a pulse sequence operator known as a STAR (selectively tailored F, accordion refocusing) to selectively manipulate two-bond and three-bond long-range correlations to protonated carbon or nitrogen resonances. A. STAR operator used in the (/, J-HMBC experiment. The experiment takes advantage of the ability of a BIRD(x,x,x) pulse to refocus the one-bond heteronuclear coupling of a protonated carbon. By doing this, the coupling to this proton...
See other pages where Shift correlation, heteronuclear accordion-optimized is mentioned: [Pg.56]    [Pg.413]    [Pg.2]    [Pg.6]    [Pg.40]    [Pg.41]    [Pg.48]    [Pg.49]    [Pg.63]    [Pg.63]    [Pg.70]    [Pg.96]    [Pg.239]    [Pg.252]    [Pg.227]   
See also in sourсe #XX -- [ Pg.48 , Pg.61 , Pg.62 , Pg.63 , Pg.64 , Pg.65 , Pg.66 , Pg.67 , Pg.68 , Pg.69 , Pg.70 , Pg.71 , Pg.72 , Pg.73 , Pg.74 , Pg.75 , Pg.76 , Pg.77 ]



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Accordion

Heteronuclear correlations

Shift correlation

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