Magnetic properties of nitric oxide molecules physisorbed into nano-sized pores of MCM-41

Masaki Mito, Tsuyoshi Tatano, Yuki Komorida, Takayuki Tajiri, Hiroyuki Deguchi, Seishi Takagi, Shigemi Kohiki, Masaaki Ohba, Ryotaro Matsuda, Susumu Kitagawa

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Abstract

We physisorbed nitric oxide (NO) molecules with spin (S) of 1/2 into the nano-sized pores of the meso-porous medium MCM-41, which allows molecule adsorption of the multi-layer form. The adsorption and desorption isotherms were observed at 121.5 K, and the effects of adsorption efficacy (i.e., the filling ratio, n) on the magnetic properties were investigated. Changes in the condensation state in the temperature region of 100-120 K were observed through the magnetic measurements, and the resultant phase diagram against n resembled that obtained for the physisorption of oxygen (O2) molecules with S = 1. For T < 90 K, two NO molecules dimerized independently of n and diamagnetic dinitrogen dioxide (N2O2) was formed. The two-dimensional magnetic state, seen for O2 physisorption, was not observed in the present system, probably due to the prominent electric polarity of the NO molecule.

Original languageEnglish
Pages (from-to)464-469
Number of pages6
JournalMicroporous and Mesoporous Materials
Volume132
Issue number3
DOIs
Publication statusPublished - Aug 1 2010
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

Cite this

Mito, M., Tatano, T., Komorida, Y., Tajiri, T., Deguchi, H., Takagi, S., ... Kitagawa, S. (2010). Magnetic properties of nitric oxide molecules physisorbed into nano-sized pores of MCM-41. Microporous and Mesoporous Materials, 132(3), 464-469. https://doi.org/10.1016/j.micromeso.2010.03.028