Development of bow-tie cavity enhanced absorption spectroscopy to study a visible circular dichroism of gas-phase molecules

2016 Fiscal Year Final Research Report

• Project/Area Number: 26410022
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Physical chemistry
• Research Institution: Shizuoka University
• Principal Investigator: Yoshiteru Matsumoto 静岡大学, 理学部, 准教授 (30360051)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 木ャビティリングダウン分光 / エレクトロスプレーイオン化 / 円偏光二色性

Outline of Final Research Achievements

To observe a circular dichroism (CD) of gas-phase molecules, we developed the apparatus of a bow-tie cavity ringdown spectroscopy (CRDS) that are constructed by four highly reflective mirrors and electrospray ionization (ESI) to generate gaseous non-volatile molecules. We applied ESI to a cyanine dye molecule in water/methanol solution, and were able to produce the dye molecule that is embedded in micro-droplet. By applying CRDS to the dye molecule in droplet, we succeeded to measure the absorption spectrum of electronic transition, which has a peak at 660 nm. In this study, we understood that highly stabilized apparatus for ESI source should be developed, if we observe a terribly weak CD signal.

Free Research Field

物理化学