TY - JOUR
T1 - Magnetic properties of nitric oxide molecules physisorbed into nano-sized pores of MCM-41
AU - Mito, Masaki
AU - Tatano, Tsuyoshi
AU - Komorida, Yuki
AU - Tajiri, Takayuki
AU - Deguchi, Hiroyuki
AU - Takagi, Seishi
AU - Kohiki, Shigemi
AU - Ohba, Masaaki
AU - Matsuda, Ryotaro
AU - Kitagawa, Susumu
N1 - Funding Information:
This work was supported by the Grant-in-Aid for Scientific Research on Priority Areas “Application of Molecular Spins” ( Area No. 769 ) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) and CREST JST project. M.M would like to express great acknowledgement to Prof. K. Mukai (Ehime University) and Prof. T. Yoshimura (Yamagata Public Corporation for the Development of Industry) for their helpful suggestions on the NO radical.
PY - 2010/8
Y1 - 2010/8
N2 - 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.
AB - 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.
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U2 - 10.1016/j.micromeso.2010.03.028
DO - 10.1016/j.micromeso.2010.03.028
M3 - Article
AN - SCOPUS:77953286256
SN - 1387-1811
VL - 132
SP - 464
EP - 469
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
IS - 3
ER -