Ultra-broadband NMR probe: numerical and experimental study of transmission line NMR probe

Multinuclear nanoliter one-dimensional and two-dimensional NMR spectroscopy with a single non-resonant microcoil

“…Figure 5 shows spectra of 1 H 13 C-HSQC, 1 H 13 C-HMBC, 19 F 13 C-HSQC and 19 F 13 C-HMBC experiments performed on neat trifluoroethanol, providing detailed information on all the coupling constants in the system. 6 anion signals, the latter appearing as doublet with characteristic 1 J PF ¼ 710 Hz 15 ), 31 P (10,000 scans, 10 h), 7 Li (16 scans, 2 min), 11 B (64 scans, 2 min), 23 Na (32 scans, 4 min) and 2 H (1 scan, 1 s). Differences in SNR between the spectra are due to differences in receptivity of the nuclides and non-optimized 90°pulses at some frequencies.…”

“…Using non-tuned coils for NMR spectroscopy has been considered in the 60s of last century 21,22 ; however, it has remained unexploited in the following decades of developments of ever higher field spectrometers. During the last decade, the 'non-resonant' NMR concept has been picked-up again, and shown useful for lowfrequency and/or low-resolution NMR applications, already corroborating the validity of this approach [23][24][25][26] . However, none of these report on high-resolution high-field applications, and advanced homo-and heteronuclear two-dimensional (2D) NMR applications of non-tuned coils.…”

An easily constructed, tuning free, ultra-broadband probe for NMR

“…The second is the appearance of a decay frequency, above which a signal will still propagate but will not effectively couple to the spins. This is due to phase delays between adjacent circuit segments [6].…”

“…• Use in solid-state NMR, where the spectral frequency ranges are often too large for conventional tuned probes [6].…”

“…• NMR of nuclei with large quadrupolar couplings, where frequency sweeps are typically employed [6].…”