Nitrogen-15 Nuclear Magnetic Resonance Studies of Porphyrins
- Creators
- Gust, Devens
- Roberts, John D.
Abstract
The ^(15)N NMR spectra of meso-tetraphenylporphyrin, its dication, and zinc tetraphenylporphyrin have been investigated both at the natural-abundance level and with isotopic enrichment. The resonances of tetraphenylporphyrin at ambient temperatures are broadened by chemical exchange of the central hydrogen atoms. At lower temperatures, the ^(15)N spectra provide structural information concerning the bonding of these hydrogens. The variable-temperature ^(15)N spectra of mixtures of tetraphenylporphyrin and its dication also reveal chemical-exchange phenomena. Spectra for tetraphenylporphyrin dication and zinc tetraphenylporphyrin at the natural-abundance level are reported. Spin-lattice relaxation times and nuclear Overhauser effect data have been determined for ^(15)N enriched samples of these two compounds.
Additional Information
© 1977 American Chemical Society. Received August 25, 1976. Supported by the National Science Foundation: the Public Health Service, Research Grant No. GM-11072, from the Division of General Medical Sciences: and the University Grants Committee, Arizona State University.Additional details
- Eprint ID
- 60912
- DOI
- 10.1021/ja00453a021
- Resolver ID
- CaltechAUTHORS:20151008-115811454
- NSF
- U.S. Public Health Service (USPHS)
- GM-11072
- Arizona State University
- Caltech
- Created
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2015-10-11Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field