Magnetic field effect on photochemical synthesis of ultrafine organosilicon particles from a gaseous mixture of trimethyl(2-propynyloxy)silane and carbon disulphide

Abstract

With the application of a magnetic field of up to 5 T, sedimentary aerosol particles which were rich in organosilicon compounds were produced from a gaseous mixture of trimethyl(2-propynyloxy)silane (TMPSi) and carbon disulphide (CS₂) under UV light irradiation at 313 nm. From measurements of monitoring (He–Ne laser) light intensity scattered by the aerosol particles, it was found that the nucleation process of aerosol particles was accelerated by application of a magnetic field. Analyses of FT-IR and X-ray photoelectron spectra (XPS) of the sedimentary aerosol particles revealed that under a magnetic field, incorporation of TMPSi molecules into the aerosol particles decreased, and resulted in a greater abundance of sulphur atoms in C–S bonding than in >C=S bonding. Chemical reactions between TMPSi and CS₂ that were responsive to the magnetic field were briefly discussed.

Acknowledgement

This work was supported by Grant-in-Aid for Scientific Research on Priority Area “Innovative utilization of strong magnetic fields” (Area 767, No. 15085203) from MEXT of Japan.