We have developed illumination devices for in situ illuminations of liquid-state Nuclear magnetic resonance spectrometers. Our illumination device can perform in versatile photo-related NMR applications, including photoisomerization and photo-chemically induced dynamic nuclear polarization (photo-CIDNP).

The configuration of illumination devices includes:

1. Light source kit
2. IO of communication control with NMR console
3. Power control unit
4. A user-friendly interface to control the power of illumination

The light source kit uses LEDs as the light source. There are several options for wavelength.

Dominant wavelengths are:
• 465~485nm
• 520~530nm
• 620~630nm
• and others: upon customer requests

Our selected LED with featured optical designs can provide sufficient radiant power for Photo-dependent experiments. Meanwhile, LED has lower risks to eye safety in the lab compared to lasers as the light source.

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Field-cycling NMR illuminator provides a no-contact lighting mechanism to irradiate the field-cycling sample during the NMR experiment. It can irradiate the sample at variable stray fields in an NMR spectrometer. The device has no long optical-fiber flipping during shuttling. Therefore, the field-cycling sample can move rapidly and preciously between the illumination spot and the acquisition sweep spot. This shuttle-illumination device is an exclusive add-on to the High-Field Field-Cycler (HFFC). To learn more about the High-Field Field-Cycler, please go to HFFC.

Key features of field-cycling NMR illuminator:

1. No optical fiber is required. The exclusive feature is that there is no touching between the field-cycling sample and the shuttle illumination device.
2. High-power LEDs with optional wavelengths
3. Changeable illumination positions along stray fields on the adapted NMR spectrometer
4. Synchronizing illumination timing with NMR pulse programs by TTL triggers
5. Computer aid for controlling the light powers and various modes of illumination timing available

Available wavelengths are:
• 465~485nm
• 520~530nm
• 620~630nm
• and others: upon customer requests

No touching illumination mechanism preserves the rapid sample shuttling feature as the standard high-field field-cycler. The high-field NMR spectrometer performance is also well-conserved. Hence, our shuttle-illumination device combined with our HFFC can perform the photo-correlated NMR experiments with comparable resolution and sensitivity as high-field NMR with additional information coming from light irradiation.

Components

Photo-CIDNP experiment tailored to the detection of H^α-C^α resonance on 1µM Trp was performed by our shuttle-illumination device with the HFFC. HFFC was installed on Bruker 700 MHz equipped with a 5mm TXI cryoprobe. The optical irradiation time was 100ms. The illumination field was at the stray field, 150 MHz. This ¹H spectrum was collected with 8 scans.

• One LED module with one wavelength on demand.
• Option for more than one LED module.
*The optical power density is calibrated with demanded wavelengths before installation.*
• An adaptor on the shuttle rail and a position adjuster
• Electric power cable for LED module /MMXC/ (the length is according to on-site demand)
• Control and power module with USB communication to the computer and TTL trigger to NMR console
• TTL trigger cable /BNC to MCX/ (the length is according to on-site demand)
• A special optical power meter for irradiation power calibration of the LED module
• A graphical user interface for controlling the power levels of illumination and setup with field cycling NMR experiments

Patent application:

Application No.: 11220100
Status: Patent pending

Related Product

High-Field Field-Cycler, a rapid sample shuttling system adapted to a high-field NMR spectrometer.

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For whom do not have High-Field Field-Cycler, the high-speed sample shuttling system, we also provide an option, the fixed-field NMR illuminator, to perform the photo-related NMR experiments at commercial high-field NMR spectrometers. The major components of this NMR illuminator are a light source module and a light guide to couple the light directly to samples inside the NMR tube. The compactness of our in-situ NMR illuminator implements photo-related experiments without additional hardware requirements in an NMR spectrometer.

Key features of fixed-field NMR illuminator:

1. The light guide is compatible with the inner diameter of conventional 5mm liquid-state NMR tubes.
2. The light guide has 4mm-diameter output of light coupling inside the NMR tube.
3. High-power LEDs with optional wavelengths are installed directly on the light guide.
4. Easy installation on commercially available NMR tubes
5. Synchronizing illumination timing with NMR pulse programs by TTL triggers.
6. Computer aid for controlling the light powers and various modes of illumination timing available

Available wavelengths are:
• 465~485nm
• 520~530nm
• 620~630nm
• and others: upon customer requests

Components

• One LED module with one wavelength on demand
• Option for more than one LED module.
• The light guide
• 5mm NMR tube holder
• Electric power cable for LED module /MMXC/ (the length is according to customer demand)
• Power and control module with USB communication to the computer and TTL trigger to NMR console
• TTL trigger cable /BNC to MCX/ (the length is according to customer demand)
• Software with a graphical user interface for controlling/calibrating the power levels of illumination (Recommend operation system: Windows X and above)
• A special optical power meter for illumination power calibration from the light guide.
• Optional for a laptop equipped with a Windows system

Patent application:

Application No.: 11220100
Status: Patent pending

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