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Doty PROTONMAX
MAS Probes
High Performance for Solids,
with
Low E Fields
PROTONMAX probes are optimized for
High decoupling fields on the PROTON channel
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Highest
decoupling efficiency, with inner PROTON coil
Longest acquisition times with full decoupling, 150-300 ms
Low E Fields since 1997, via patented cross coil
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Lower
decoupler heating by an order of magnitude of
biological solids compared to solenoid only
Tuning Options:
1H/X/Y - Double-broadband X & Y channels
1H/X - broadband X channel
Several 19F tuning options
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Available for Narrow-
and Wide-bore Magnets |
Wide Temperature Ranges Options: |
MAS Spinner Assembly Options |
Narrow Bore:
-80°C to +120°C for Standard NB VT Range
-150°C to +150°C for XVT (extended NB VT)
-170°C for LXVT (low
temperature range extended)
Wide Bore:
-140°C to +170°C for Standard WB VT Range
-150°C to +250°C for XVT (extended WB VT)
-170°C for LXVT (low
temperature range extended)
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Spinner
Assembly |
Maximum
Speed |
3 mm DI3, Drop-In * |
28
kHz |
4 mm DI4, Drop-In * |
18
kHz |
4 mm XC4 |
24
kHz |
5 mm XC5 |
18
kHz |
| 7
mm XC7 (WB Only) |
12
kHz |
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*Top loading (auto
sample eject) requires Drop In MAS spinner.
(Currently only in NB) |
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13C
CP/MAS on Glycine@ 750
H/C/N tuning MHz, 4 mm, S/N=218
Natural-abundance glycine 13C, 4 scans,
110 kHz TPPM 1H decoupling, 70 μL sample,
ramped-CP at 50 kHz for 1 ms, 17 kHz MAS.
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110 kHz decoupling fields at 750 MHz
with 10 to 25 times lower sample heating compared to solenoid-only
probes. Stable tuning, low heating, high sensitivity, and excellent
B1 matching on both coils, even for lossy samples.
Unlike many sample coil designs, the B1 homogeneity
of the cross coil coil is not significantly effected by the sample
because of its inherent electrical balance, symmetry, and very
low inductance. |
Proven
Performance
13C-1H MAS-J-HMQC Solid State NMR Spectrum of β-maltose,
taken at
natural abundance in 13C . Homonuclear 1H
decoupling in the J evolution periods, τ , and t1 was
achieved using the PMLG technique.
See: Yates, et al., JACS . 2005, 127, 10216-10220. Spectrum
courtesy of S.P. Brown, Univ. of Warwick, UK.
Please
contact sales
with questions or quote requests.
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