chemical shift

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chemical shift

[′kem·i·kəl ′shift]
(physical chemistry)
Shift in a nuclear magnetic-resonance spectrum resulting from diamagnetic shielding of the nuclei by the surrounding electrons.
References in periodicals archive ?
2+] ions have a stronger deshielding effect on the [beta] and
The substitution of one HEMA unit by one MA unit in an MA centered sequence gives rise to a small deshielding effect of the C=0 amide group of the MA central unit, with a shift of the corresponding signal to a lower field (higher 6).
Unlike alkali and alkali-earth ions, transition-metal ions possess d-electrons, which can be delocalized through their direct coordination with porphyrin-core, increasing the "ring current" and proton deshielding.