Abstract
A simple, inexpensive, and modular method to directly illuminate NMR samples for in situ analysis of photochemical transformations is reported. The versatility of this technique is demonstrated by analyzing the light-induced propagating front for small-molecule photoswitches and the kinetics of photocontrolled living radical polymerizations. In situ measurements allow oxygen-sensitive and rapid photoevents to be studied in detail, leading to reliable determination of photoswitching quantum yields and polymerization rates. By systematically tuning light intensity, a direct relationship between propagation rate and intensity is revealed. Of particular note is the facile translation of the conditions identified through this NMR analysis to analogous benchtop experiments with insight into the nature of the photoreactive species.
| Original language | English |
|---|---|
| Pages (from-to) | 125-131 |
| Number of pages | 7 |
| Journal | ChemPhotoChem |
| Volume | 1 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1 Apr 2017 |
| Externally published | Yes |
Bibliographical note
Funding Information:. We thank the MRSEC program of the National Science Foundation (DMR 1121053), the Dow Chemical Company through the Dow Materials Institute at UCSB and the Institute for Collaborative Biotechnologies through grant W911NF‐09‐0001 from the U.S. Army Research Office for financial support. The content of the information does not necessarily reflect the position or the policy of the Government, and no official endorsement should be inferred. F.E. acknowledges generous support by the Fonds der Chemischen Industrie. We thank Dr. Hongjun Zhou and Jerry Hu for insightful discussion and technical help with the NMR experiments
Funding Information:
We thank the MRSEC program of the National Science Foundation (DMR 1121053), the Dow Chemical Company through the Dow Materials Institute at UCSB and the Institute for Collaborative Biotechnologies through grant W911NF-09-0001 from the U.S. Army Research Office for financial support. The content of the information does not necessarily reflect the position or the policy of the Government, and no official endorsement should be inferred. F.E. acknowledges generous support by the Fonds der Chemischen Industrie. We thank Dr. Hongjun Zhou and Jerry Hu for insightful discussion and technical help with the NMR experiments.
Publisher Copyright:
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Funding
. We thank the MRSEC program of the National Science Foundation (DMR 1121053), the Dow Chemical Company through the Dow Materials Institute at UCSB and the Institute for Collaborative Biotechnologies through grant W911NF‐09‐0001 from the U.S. Army Research Office for financial support. The content of the information does not necessarily reflect the position or the policy of the Government, and no official endorsement should be inferred. F.E. acknowledges generous support by the Fonds der Chemischen Industrie. We thank Dr. Hongjun Zhou and Jerry Hu for insightful discussion and technical help with the NMR experiments We thank the MRSEC program of the National Science Foundation (DMR 1121053), the Dow Chemical Company through the Dow Materials Institute at UCSB and the Institute for Collaborative Biotechnologies through grant W911NF-09-0001 from the U.S. Army Research Office for financial support. The content of the information does not necessarily reflect the position or the policy of the Government, and no official endorsement should be inferred. F.E. acknowledges generous support by the Fonds der Chemischen Industrie. We thank Dr. Hongjun Zhou and Jerry Hu for insightful discussion and technical help with the NMR experiments.
Keywords
- front propagation
- kinetics
- molecular switches
- NMR spectroscopy
- photopolymerization
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