Dynamics of isolated ions by electrospray-LIF measurement

2015 Fiscal Year Final Research Report

• Project/Area Number: 24350011
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Physical chemistry
• Research Institution: University of Hyogo
• Principal Investigator: HONMA KENJI 兵庫県立大学, 物質理学研究科, 教授 (30150288)
• Co-Investigator(Kenkyū-buntansha): MATSUMOTO YOSHITERU 静岡大学, 理学部, 准教授 (30360051)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: レーザー誘起蛍光 / イオントラップ / 質量分析 / 錯イオン

Outline of Final Research Achievements

Laser excited emission and dissociation spectroscopy is applied to ionic species which are formed by the electrospray ion source(ESI). Ions accumulated in an ion-trap are irradiated by a pulsed laser and fluorescence from the ions or their depletion are monitored.
Ru(bpy)32+ is formed by the ESI and desolvated. The laser pulse corresponding to the MLCT(metal-ligand charge transfer) band is irradiated to the ions accumulated in the ion-trap. The depletion of Ru(bpy)32+ is measured as a function of laser wavelength. The dissociation action spectrum shows the band similar but much narrower than the spectra in solutions.
Rhodamin 590 is selected to measure the laser-induced fluorescence from isolated ions. Long accumulation time enable to measure the LIF spectrum, which is largely blue shifted compared to the R590 in solution. This measurement encourage to extend the LIF study to the various isolated biological ions, and comparison with the solution will provide valuable information.

Free Research Field

物理化学