Synthesis and photophysical properties of new supramolecular nanoassemblies constructed by donor and acceptor columns for light energy conversion

2014 Fiscal Year Final Research Report

• Project/Area Number: 25886012
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Nanomaterials chemistry
• Research Institution: Keio University
• Principal Investigator: SAKAI Hayato 慶應義塾大学, 理工学部, 助教 (60708486)
• Project Period (FY): 2013-08-30 – 2015-03-31
• Keywords: 超分子集合体 / ポルフィリン / 多環芳香族イミド体 / 水素結合 / 光誘起電子移動 / 電子物性 / 励起ダイナミクス

Outline of Final Research Achievements

A series of benzo[ghi]perylene and coronene derivatives substituted by electron-
withdrawing groups were systematically synthesized considering number of imide groups and the peripheral positions. The photophysical and electrochemical properties of these compounds were investigated by steady-state spectroscopy, cyclic voltammetry. The synthetic introduction of proper substituents on the poly aromatic hydrocarbon therefore enables us to control the electrochemical and photophysical behaviors. The steady-state absorption spectra become red-shifted as compared to unsubstituted benzo[ghi]perylene. Regarding the electrochemistry, with an increase in the number of imide groups, the reduction potentials are shifted to the positive direction. Next, the supramolecular complex between zinc porphyrin and benzo[ghi]perylenetriimide derivatives　through hydrogen bond was confirmed by 1H NMR. Finally, femtosecond transient absorption measurements indicated that efficient phoinduced electron transfer.

Free Research Field

有機合成化学