Fluorescence and Non-linear Optical Properties of Disilane-Bridged Donor-Acceptor Molecules

2014 Fiscal Year Final Research Report

• Project/Area Number: 24550221
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Organic industrial materials
• Research Institution: The University of Tokyo
• Principal Investigator: YAMANOI Yoshinori 東京大学, 理学(系)研究科(研究院), 准教授 (20342636)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 非線形光学 / シラン / カップリング / 蛍光

Outline of Final Research Achievements

A series of disilane-bridged donor-acceptor molecules containing strong electron donating and withdrawing substituents was designed and synthesized in acceptable yields. The substituents substantially affected the fluorescence and non-linear optical properties of the compounds. In the solid state, the compounds showed blue-purple fluorescence with high quantum yields. Compound which had p-N,N-dimethylamino and o-cyano substituents exhibited optical second harmonic generation (activity: ca. 3.0 times that of urea) in the powder state. Density functional theory calculations for the ground and excited states indicated that both the locally excited state and the intramolecular charge transfer excited state made important contributions to the luminescent behavior.

Free Research Field

合成化学