NB – H/X or H/X/Y MAS

Narrow Bore H/X or H/X/Y MAS  Probes

 S/N, RF Field Strength, and Extended VT

Low E 1H Coil

High-Q solenoid for X and Y

 

Highest S/N (500 MHz, H/X tuning)

4 mm – 205:1 on 50 mg of glycine, 13C .  1H with 97.4 W  and 13C  with 93.1 W

3 mm – 103:1 on 18 mg of Glycine, 13C.  1H with 97.5 W  and 13C  with 53 W .
3 mm – 258:1 on 18 mg of HMB, 13C.

Highest rf field strengths and efficiency

1.3-µs π/2 pulse with only 640 W for 13C.
3 mm DI-3 at 500 MHz, H/X tuning.


Extremely robust and easy to use.

3 year limited warranty.


Fast sample spinning in high-sensitivity Si3N4 rotors

28 kHz in the DI-3
18 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.


Wide Temperature Ranges Options:

-80°C to +120°C for Standard NB VT Range
-150°C to +150°C for XVT (extended NB VT)


Lowest thermal gradients.

<3°C under combined fast MAS, high decoupling, and XVT.


Lowest background signals.

Minimal 13C, 1H, 19F,27Al, 29Si, 11B, 15N, 23Na, 2H, 17O, … Si3N4 and non-magnetic alloy construction.


Exceptional 1H B1 homogeneity over full sample.


Best axial and Q stability for minimal artifacts in 2D spectra (patented coil and spinner technology).


Minimum E fields for negligible RF sample heating.


Si3N4 rotors, for best S/N and longest lifetime.


Order of magnitude lower decoupler heating compared to solenoid only


Compatible with Agilent, Bruker, and JEOL (and other earlier systems)


Superior spinning speed stability – under 1 Hz.


Clean optical sensing for pulse-rotation synchronization.


 

Spectra

4 mm  CP/MAS at 500 MHz, Glycine,
H/C tuning,S/N=205:1,
49.7 mg of α-glycine, 4 scans,
97.4 kHz TPPM1H decoupling,
46 μL sample, ramped-CP at 62 kHz for 7.5 ms,
10 kHz MAS.1H with 97.4 W  and 13C  with 93.1 W

The probe had a “Bmax” coil with an inner X solenoid and a low E  1H outer coil.

Spectra:  George Entzminger and Paul Ellis, Doty Scientific

Spectra 1

3 mm H/X @ 500 MHz, 2D MQ-MAS spectrum
of the 5/2 27Altransition of Kyanite
MQ-MASspectrum of Kyanite
in the DI-3 BMAX probe.
180 kHz 27Al field strength.Spin rate is 22 kHz.

The probe had a “Bmax” coil with an inner X solenoid and an outer low E  1H coil.

Spectra:  Mike Frey, JEOL

BMAX-Spectra-2_m
Spinner Assembly
Maximum Speed
3 mm DI3, Drop-In *
28 kHz
4 mm DI4, Drop-In *
18 kHz
4 mm XC4
22 kHz
5 mm XC5
18 kHz
 

 

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