EPR spectroscopy

Benchtop CW X-band spectrometer
Specifications
 Model  Magnettech ESR5000
 Temperature control  Variable temperature unit (T = 93 K – 473 K), finger Dewar
Benchtop CW X-band spectrometer
CW X-band spectrometer
Specifications
 Model  Bruker EMXplus
 Resonators  ER4122SHQE with optical access, ER4119HS, ER4103TM, ER4116DM (dual-mode) with optical access
 Temperature control  Continuous-flow cryostat (Oxford Instruments ESR900, T = RT – 5 K)
CW X-band spectrometer
CW/pulsed X/Q-band spectrometer with shaped pulses and ENDOR
Specifications
 Model  Bruker Elexsys E580
 Frequency bands  X (9.5 GHz), Q (34 GHz)
 X-band resonators  ER4118X-MS2, ER4118X-MD5W, EN4118X-MD4W (ENDOR)
 X-band pulse amplifier  1 kW TWT
 Q-band resonators  ER5106QT-IIW, EN51017D2 (ENDOR)
 Q-band pulse amplifier  300 W TWT
 Temperature control  Cryogen-free cryostat (Cryogenic, T = 325 K – 3 K)
 Signal digitiser  SpecJet III (0.5 ns time resolution, 14 bit amplitude resolution)
 AWG  SpinJet AWG generator (0.625 ns time resolution, 14 bit amplitude resolution)
 ENDOR  DICE ENDOR generator (100 kHz – 250 MHz), 150 W RF amplifier
CW/pulsed X/Q-band spectrometer with shaped pulses and ENDOR
High-sensitivity home-built pulsed X-band spectrometer
Specifications
 Microwave source  DC-12 GHz vector signal generator with low phase noise
 Pulse generator  16-bit AWG with 540 MHz bandwidth
 Signal digitiser  500 MS/s, 14 bit digitiser with on-board averaging
High-sensitivity home-built pulsed X-band spectrometer

The equipment further includes an ultra-low-noise cryogenic probehead, providing >10× signal-to-noise improvement, and superconducting microwave resonators.

Additional equipment

Tuneable pulsed Laser with broadband OPO
Specifications
 Model  Litron Aurora II Integra OPO A23-39-21
 Pump source  Q-switched Nd:YAG
 Wavelength range  410 nm – 710 nm (signal) / 710 nm – 2600 nm (idler)
 Pulses  39 mJ (signal) / 14 mJ (idler), 6 ns, 21 Hz repetition rate
High-sensitivity home-built pulsed X-band spectrometer
Spectroelectrochemical setup

The Roessler research group has developed a home-built setup based on film electrochemistry for the generation of paramagnetic intermediates inside the EPR capillary and their characterisation under precise electrochemical conditions.


For further information, please contact Dr Maxie Roessler.

Contact us

Centre for Pulse EPR Spectroscopy
Department of Chemistry
Imperial College London
White City Campus
Molecular Sciences Research Hub
London W12 0BZ

E-mail: a.collauto@imperial.ac.uk
Follow us on Twitter: @PEPR_Facility