Precise real-space imaging of molecular dynamics

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K15235
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 32010:Fundamental physical chemistry-related
• Research Institution: Tokyo University of Science
• Principal Investigator: Hoshino Shoma 東京理科大学, 理学部第一部化学科, 助教 (20783616)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: イオンイメージング / 化学反応動力学 / 励起状態素過程

Outline of Final Research Achievements

The purpose of this research project is to develop a novel spectroscopic method that can observe molecular dynamics using ion-imaging techniques and laser spectroscopy.
First, we designed an ion-imaging spectrometer based on the simulation of the flight trajectory of charged particles, and improved the current supersonic molecular beam time-of-flight mass spectrometer and laser spectrometer system. A multi-channel plate detector with a phosphor screen, a CMOS camera, and a high-speed pulsed power supply were newly incorporated into the our system to develop the ion-imaging spectrometer.
Using the constructed quantum state-selective scattering imaging system, the dissociation dynamics of molecular bromine (Br2) and dimethyl sulfoxide molecules (DMSO) were investigated.

Free Research Field

物理化学

Academic Significance and Societal Importance of the Research Achievements

本研究課題では、新規量子状態選別散乱イメージングシステムを構築し、いくつかの気相分子の光化学反応ダイナミクスを調査した。特に、臭素分子の高励起状態はこれまで分光学的な解析のみが行われており、その反応ダイナミクスに関しては全くの未解明であった。本研究課題で開発したイメージングシステム・手法は、高エネルギー領域に存在する電子励起状態における反応過程を解明する上でロバストな手法となり得る。