Magnetic resonance utilizing electron spin polarization created by evanescent light excitation

2014 Fiscal Year Final Research Report

• Project/Area Number: 24350004
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Physical chemistry
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: KAWAI Akio 東京工業大学, 理工学研究科, 准教授 (50262259)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 全反射分光 / 近接場光 / 三重項 / 電子スピン分極 / 可視紫外分光 / 光化学反応 / イオン液体 / 光分解

Outline of Final Research Achievements

To investigate chemical reaction and diffusion dynamics near solid-liquid interface region, novel spectroscopic methods were developed. Two different types of spectrometer were bult: One is a UV/Vis optical absorption spectrometry utilizing evanescent wave light irradiation and the other is an electron spin polarization assisted ESR appratus utilizing evanescent light excitaiton of moleucles near the interface. By the optical spectrometer, steady state absorption spectra of dye molecules in ionic liquids were observed for near interface region. Triplet relaxation process near the interface was also observed by a transient absorption method utilizing evanescent wave light as a probe of the triplet dye molecules. During the developement of novel spectrometers, several important factors for successful measurements were summarized. As for the ESR apparatus, a unique cell which can be placed inside of ESR cavity was built. Trial ESR measurements have just started.

Free Research Field

物理化学