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Solvent suppression in liquid state NMR with selective intermolecular zero-quantum coherences

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Balla, D., & faber, C. (2004). Solvent suppression in liquid state NMR with selective intermolecular zero-quantum coherences. Chemical Physics Letters, 393(4-6), 464-469. doi:10.1016/j.cplett.2004.06.087.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-D81B-A
Abstract
We compared several variants of 2D selective intermolecular zero-quantum pulse sequences which use selective pulses and selective refocusing modules in different positions within the sequence to achieve suppression of the solvent signal. We show that a theoretical two-fold gain in cross peak intensity in the selective spectra, compared to the non-selective sequence, is only valid for certain parameters and is additionally influenced by faster signal build-up and better solvent suppression. We show experimentally that for low concentration solutes application of a single selective mixing pulse suppresses solvent signal efficiently. Further selective refocusing modules can actually reduce this efficiency.