Research Article

15N solid-NMR and X-ray diffraction studies of N-confused porphyrins

  1. Masashi Fukuchi1,
  2. K. Takegoshi1,*,
  3. Tomoya Ishizuka2,
  4. Hiroyuki Furuta3

Article first published online: 21 DEC 2007

DOI: 10.1002/mrc.2066

Issue

Magnetic Resonance in Chemistry

Magnetic Resonance in Chemistry

Special Issue: New techniques in solid-state NMR

Volume 45, Issue S1, pages S56–S60, December 2007

Additional Information

How to Cite

Fukuchi, M., Takegoshi, K., Ishizuka, T. and Furuta, H. (2007), 15N solid-NMR and X-ray diffraction studies of N-confused porphyrins. Magn. Reson. Chem., 45: S56–S60. doi: 10.1002/mrc.2066

Author Information

  1. 1

    Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, Japan

  2. 2

    Institute for Molecular Science, Department of Materials Molecular Science, Okazaki, Japan

  3. 3

    Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka, Japan

*Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.

Publication History

  1. Issue published online: 21 DEC 2007
  2. Article first published online: 21 DEC 2007
  3. Manuscript Accepted: 14 JUL 2007
  4. Manuscript Revised: 11 JUL 2007
  5. Manuscript Received: 1 JUN 2007

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Keywords:

  • NMR;
  • 15N;
  • porphyrin;
  • solid state;
  • disorder

Abstract

Using 15N high-resolution solid-state NMR and X-ray diffraction, the structure of N-confused porphyrin (NCP) in the solid state was studied. A 1D 15N magic angle spinning (MAS) experiment and a 2D dipolar assisted rotational resonance (DARR) 15N[BOND]15N spin exchange experiment of N-confused tetratolylporphyrin (Tol) crystallized from CH2Cl2/hexane indicate that Tol is the inner 3H-type tautomer and has two magnetically different molecules in the unit cell. Further, a FSLG-2&4macr;2 1H[BOND]15N dipolar recoupling NMR measurement indicates no fast ring flipping motion which is consistent with the planar structure in the X-ray analysis. The planarity of Tol is ascribed to crystal packing enforced by π–π stacking and CH–π interactions. Copyright © 2007 John Wiley & Sons, Ltd.

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