title: Magnetic susceptibility measurement of single iron/cobalt carbonyl microcrystal by atmospheric magnetophoresis.
abstract: In this study, the use of an innovative atmospheric magnetophoresis, which enables us to measure the mass magnetic susceptibility and mass of a microparticle simultaneously, was demonstrated. Using this technique, we determined the magnetic susceptibility of a crystalline deposit of iron/cobalt carbonyl, mainly composed of Fe2(CO)9, which was prepared photochemically from a gaseous mixture of iron pentacarbonyl (Fe(CO)5) and cobalt tricarbonyl nitrosyl (Co(CO)3NO). The mass magnetic susceptibility and the characteristic relaxation time of the microcrystal were (7.0±1.9)×10-9m3kg-1and (5.6±2.2)×10-4s, respectively. The observed magnetic susceptibility shows that the microparticle was paramagnetic. Assuming that the density was equal to that of Fe2(CO)9(2.1×103kg m-3) and that the shape of the particle was spherical, a hydrodynamic radius of 4.7 μm and a mass of 0.91 ng were observed. It was suggested that Co was incorporated in Fe2(CO)9.
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Masayori
authors.initials: M
authors.lastname: Suwa
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Oshino
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Watarai
authors.affiliation: Graduate School of Advanced Integration Science, Chiba University, Yayoi-Cho, Inage-ku, Chiba 263-8522, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Morita
authors.affiliation: Graduate School of Science and Technology, Chiba University, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.
authors.forename: Anzu
authors.initials: A
authors.lastname: Kasai
authors.affiliation: Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, 25086 Řež near Prague, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Šubrt
keywords: cobalt tricarbonyl nitrosyl; gas phase photochemical reaction; iron pentacarbonyl; magnetic susceptibility; magnetophoresis under atmosphere