Highest S/N
Compare: 205:1 on 50 mg of glycine, 13C.
258:1 on 18 mg of HMB, 13C. 500 MHz.
Highest rf field strengths and efficiency
Compare: 1.3-µs π/2
pulse with only 640 W.
Above for 13C, DI-3 at 500 MHz, H/X tuning.
Fast sample spinning
in easy-to-use high-sensitivity Si3N4 rotors
28 kHz (soon 30 kHz) in the DI-3
18 kHz (soon 20 kHz) in the DI-4
(and more spinners – see below)
H-F/X/Y broad-band tuning with maximum
performance. Tuning options from 109Ag to 31P.
High-power, long-acquisition 1H decoupling (even
at 950 MHz). 100 ms of 70 kHz 1H dec. on the DI-4
at 500 MHz with 250 W.
Widest sample-temperature ranges.
NB options from -170°C to +150°C
WB options from -170°C to +250°C
Lowest background signals. Minimal 13C, 1H, 19F,
27Al, 29Si, 11B, 15N, 23Na, 2H, 17O, …
Si3N4 and non-magnetic alloy construction.
Minimum ring-down time and phase transients
(no transmission-line tuning elements).
Lowest thermal gradients. <3°C under
combined fast MAS, high decoupling, and XVT.
Best axial and Q stability for minimal artifacts in 2D spectra (patented
coil and spinner technology).
Minimum E fields for negligible RF sample heating.
Spectral resolution approaching liquids standards –can be
under 4 ppb.
Exceptional 1H B1 homogeneity over full sample.
Extremely robust and easy to use. Narrow bore
available with auto sample eject/load.
Compatible with Agilent, Bruker, and JEOL
Superior spinning speed stability – under 1 Hz.
Clean optical sensing for pulse-rotation
synchronization.
Si3N4 rotors, for best S/N and longest lifetime.
Lowest-priced high-performance solids probes.
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DE
(Doty-Entzminger) outer decoupling coil,
inner X/Y solenoid.
The spinner option shown here is the XC4.
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4
mm BMAX CP/MAS, Glycine 13C @ 500 MHz
H/C tuning, S/N=205:1
49.7
mg of α-glycine, 4
scans, 97.4 kHz TPPM 1H decoupling, 46 μL
sample, ramped-CP at 62 kHz for 7.5 ms, 10 kHz MAS
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3 mm BMAX H/X @ 500
MHz, 2D MQ-MAS spectrum of the 5/2 27Al transition of Kyanite
2D MQ-MAS spectrum of Kyanite in the DI-3
BMAX probe.
180 kHz 27Al field strength.
Spin rate is 22 kHz.
Spectra: Mike Frey, JEOL; and George Entzminger and Paul Ellis,
Doty Scientific
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