Structural change dynamics of molecular assembles of metal complexes observed by advanced time-resolved spectroscopy

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05447
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Inorganic chemistry
• Research Institution: University of Toyama
• Principal Investigator: Iwamura Munetaka 富山大学, 大学院理工学研究部(理学), 講師 (60372942)
• Research Collaborator: Chen Lin X.
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 時間分解分光 / 金原子間相互作用 / 核波束運動 / 会合性錯体 / 発光 / エキシプレックス / オリゴマー / 過渡吸収分光

Outline of Final Research Achievements

Considerable increase of association degree of oligomers of the dicyano-gold (I) complex formed in the aqueous solution and the luminescence quantum yield was found by addition of coexisting salts. Particularly significant effects were observed when tetraethyl ammonium and relevant cationic polymers were added. Analysis of concentration dependence and emission wavelength revealed that associate species from pentamer to octamer were generated. In contrast, it was revealed that association was inhibited in tetracyanoplatinum complexes with coexisting species of quaternary ammonium cations.
We measured the nuclear wave packet motions of these large oligomers by time-resolved spectroscopic measurement and found that an extremely large beat signal was measured. By analysis of the oscillations, detailed assignments of the observed absorption bands for the oligomers was made.

Free Research Field

錯体化学、分子分光学