In the Institute, four Bruker solid state NMR spectrometers are available, operating at different field strength :
The individual equipment of the different instruments is presented below.
The 300 MHz Super Wide Bore System
The magnet
of the 300 MHz NMR system has a bore of 89 mm inner diameter
providing sufficient space for NMR experiments with special requirements, e.g. para hydrogen induced polarization NMR
measurements, and home build probes. The console is a Bruker Avance II console with two 1 kW linear amplifier for
¹H and X channel. A third channel can be added, if needed and numerous probes are available for the 300 MHz magnet system. The most frequently used probes are listed below.
| Probe | Frequency Range | Temperature Range |
| 2.5 mm MAS ¹H-X | 1-H; 31-P .. 2-H | VTN : 230 - 400 K |
| 2 x 4 mm MAS ¹H-X | 1-H; 31-P .. 2-H | VTN : 200 - 400 K |
| 7 mm MAS ¹H-X | 1-H; 31-P .. 6-Li | VTN : 200 - 400 K |
| 7 mm MAS ¹H-¹³C-²H | 1-H; 13-C; 2-H | VTN : 200 - 400 K |
| 7 mm MAS ¹H-X | 1-H; 31-P .. 15-N | VTN : 200 - 500 K |
| 7 mm static ²H | 2-H optimized | VT : 200 - 450 K |
Due to the remarkable band width of 20 MHz of the digital reciever unit (DRU), this spectrometer suites best the requirement for static ²H NMR experiments. It is placed in room 0.114 together with the 500 MHz and the 700 MHz NMR spectrometer described below.
The 500 MHz Wide Bore System
The 500 MHz
NMR system is controled by a Bruker Avance III console with four high power RF channels. Various tripple resonance experiments (¹H, X and Y) are feasible on this maschine
including 1H-19F correlation NMR experiments. Though, the magnetic field is not to strong, it is sufficient to provide some resolution in dense proton systems under fast magic
angle spinning conditions. In combination with heteronuclear correlation experiments, partially disordered systems as well
as supramolecular architectures are studied on this system.
| Probe | Frequency Range | Temperature Range |
| 2.5 mm MAS ¹H/F-X | 1-H .. 19-F; 31-P .. 15-N | VTN : 230 - 400 K |
| 2.5 mm MAS 1H-19F-X | 1-H; 19-F; 7-Li .. 2-H | VTN : 230 - 400 K |
| 2.5 mm MAS ¹H-X-Y | 1-H; 13-C; 2-H | VTN : 230 - 400 K |
| 4 mm MAS ¹H-X | 1-H; 31-P .. 15-N | VTN : 200 - 400 K |
| 4 mm MAS ¹H-X | 1-H; 27-Al .. 29-Si | DVT : 200 - 500 K |
| 4 mm MAS ¹H-X-Y | 1-H; 13-C; 29-Si | VTN : 200 - 400 K |
| 7 mm MAS ¹H-X | 1-H; 31-P .. 15-N | VTN : 200 - 400 K |
| 7 mm MAS ¹H-¹³C | 1-H; 13-C | WVT : 200 - 500 K |
| 7 mm static ¹H-X | 1-H; 63-Cu .. 15-N | VT : 200 - 500 K |
| 5 mm static X | 31-P .. 109-Ag | VT : 200 - 500 K |
For variable temperature measurements under static or MAS conditions, heat exchanger operating with liquid nitrogen as well as a Bruker BCUII cooling unit are available in the lab.
The 700 MHz Standard Bore System
The 700 MHz
spectrometer is controled by a Bruker Avance III console configured for double resonance experiments under fast MAS and HR-MAS NMR experiments with 2H lock.
The system is mainly used to obtain sufficient chemical shift resolution in 1H double quantum spectra of dense proton systems as well as for hetero-
nuclear correlation experiments, based on cross polarization or on REDOR methods.
| Probe | Frequency Range | Temperature Range |
| 1.3 mm MAS ¹H-X | 1-H; 27-Al .. 29-Si | DVT : 290 - 330 K |
| 2.5 mm MAS ¹H-X | 1-H; 13-C .. 15-N | VTN : 230 - 400 K |
| 2.5 mm MAS ¹H-X | 1-H; 31-P .. 13-C | VTN : 230 - 400 K |
| 2.5 mm MAS ¹H-X | 1-H; 31-P .. 15-N | DVT : 230 - 400 K |
| 4 mm MAS ¹H-X | 1-H; 29-Si .. 87-Ru | VTN : 230 - 400 K |
| 4 mm HR-MAS | 1-H; 13-C; 2-H Lock | VTN : 230 - 400 K |
| 4 mm static X | 1-H .. 15-N | VT : 200 - 500 K |
The 700 MHz system is located in room 0.114. For variable temperature measurements under MAS conditions a Bruker BCU 60 cooling unit is available in the lab.
The 850 MHz Standard Bore System
The 850 MHz system is our newes NMR system operating with a Bruker Avance III console. It is equipped with 4 channels plus 2H lock channel. Due to the substantial spatial requirements of the pumped magnet system, the 850 MHz system is located in
a separat lab building (room 0.709). The strong magnetic field of this spectrometer is of particular interest for the investigation of hydrogen bonded systems, such as supra molecular architectures and functional materials.
The 850 MHz high field NMR spectrometer can be used for high resolution NMR studies with a Bruker SX40 sample changer or for solid state NMR measurements with a Bruker MAS3 unit.Variable temperature measurements can be performed in the temperature range from 200 - 400 K with a BCUII cooling unit controled by a BSVT temperature unit.
| Probe | Frequency Range | Temperature Range |
| 1.3 mm MAS ¹H-X | 1-H; 27-Al .. 29-Si | DVT : 290 - 330 K |
| 2.5 mm MAS ¹H-X | 1-H; 13-C .. 15-N | DVT : 230 - 400 K |
| 3.2 mm MAS ¹H-¹³C-²H | 1-H; 13-C; 2-H .. 15-N | DVT : 230 - 400 K |
The 2.5 mm MAS ¹H-X double resonance probe is suitable for NMR experiments under fast MAS conditions, whereas the 3.2 mm MAS ¹H-¹³C-²H triple resonance probe provides a better sensitivity, due to the bigger sample volume and the optimized resonance frequencies.