Feldmeier, C. and Bartling, H. and Riedle, E. and Gschwind, R. M. (2013) LED based NMR illumination device for mechanistic studies on photochemical reactions - Versatile and simple, yet surprisingly powerful. JOURNAL OF MAGNETIC RESONANCE, 232. pp. 39-44. ISSN 1090-7807,
Full text not available from this repository. (Request a copy)Abstract
An LED based illumination device for mechanistic studies on photochemical reactions by means of NMR spectroscopy is presented. The LEDs are directly switched by the NMR spectrometer with the help of a one-stage electronic circuit. This allows for continuous or alternatively pulsed operation of the LEDs. Continuous operation provides direct comparability with conditions in synthetic chemistry, in pulsed operation the short time light power can be enhanced ninefold. The LEDs are efficiently coupled to a 1000 mu m core optical fiber guiding the light into the spectrometer by simply bringing it in close contact to the fiber. The tip of the fiber is roughened by sandblasting and thus emits light in a uniform and efficient way over the full length of the receiver coil. The combination of these techniques tremendously increases the amount of light brought into the NMR sample and makes LEDs an easy, versatile and handy light source for the in situ illumination of NMR samples allowing even for single millisecond time resolved Photo-CIDNP spectroscopy. (C) 2013 Elsevier Inc. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | WAHREND RASCHER RADIKALREAKTIONEN; DYNAMIC NUCLEAR-POLARIZATION; LIGHT PHOTOREDOX CATALYSIS; CIDNP; INTERMEDIATE; PHOTOOXIDATION; SPECTROMETER; SPECTROSCOPY; PATHWAY; NMR; LED illumination device; CIDNP; Photochemistry |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Organische Chemie > Arbeitskreis Prof. Dr. Ruth Gschwind |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Apr 2020 09:03 |
| Last Modified: | 07 Apr 2020 09:03 |
| URI: | https://pred.uni-regensburg.de/id/eprint/16455 |
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