1H and 13C NMR Relaxation Study of Iron(III) Tetraphenylporphyrin–Imidazole Complexes
Abstract
1H and 13C nuclear relaxation of paramagnetic iron(III) tetraphenylporphyrin–imidazole complexes has been investigated in order to gain insight into the relationship between the paramagnetic relaxation rate and the electron-nucleus distance. The analysis of the nuclear spin–lattice relaxation time (T1) in terms of the distance indicated that, for the iron porphyrin complexes used, the contribution of the electron-nucleus dipolar coupling no longer contributes significantly to the relaxation process of a proton located at more than 0.75 nm away from the iron. For the complexes studied, the electron spin–lattice relaxation time (T1e) of 6.4 ps was calculated from the T1 values measured at 26°C.
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References 14 · Cited by 6
- Authors
- Yamamoto, Y., Nanai, N., Chûjô, R., & Inoue, Y.
- Affiliations
- Tokyo Institute of Technology (JP)
- Department of Biomolecular Engineering, Tokyo Institute of Technology
- ORCID
- Yamamoto, Yasuhiko
- Venue
- Bulletin of the Chemical Society of Japan
- Publisher
- Oxford University Press (OUP)
- Published
- 1991-10-01
- Volume
- 64
- Issue
- 10
- Pages
- 3199-3201
- ISSN
- 0009-2673 (ISSN-L)
- 1348-0634
- OpenAlex
- W2025889944
- Cited by
- 6
- References
- 14
- Citations by year
- 2025: 1
- FWCI
- 0.29
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Bulletin of the Chemical Society of Japan (publishedVersion)
- Topics
- Physical Sciences › Chemistry › Spectroscopy › Advanced NMR Techniques and Applications
- Physical Sciences › Materials Science › Materials Chemistry › Porphyrin and Phthalocyanine Chemistry
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Magnetism in coordination complexes
- Keywords
- imidazole complexes, paramagnetic relaxation, electron spin-lattice relaxation, nuclear spin-lattice relaxation, 1H NMR relaxation, 13C NMR relaxation
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