Multifunctional Photoresponsive System Focused on Molecular Orbital Topology and Molecular Alignment

2018 Fiscal Year Final Research Report

• Project Area: Application of Cooperative-Excitation into Innovative Molecular Systems with High-Order Photo-functions
• Project/Area Number: 26107008
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Kyoto University
• Principal Investigator: Matsuda Kenji 京都大学, 工学研究科, 教授 (80262145)
• Research Collaborator: Hirose Takashi ; Hirose Takashi
• Project Period (FY): 2014-07-10 – 2019-03-31
• Keywords: フォトクロミズム / 自己組織化 / STM / 協同性 / 分子電導

Outline of Final Research Achievements

The gold nanoparticle networks with DAEs, which have same core structures but have different positions of thiol groups, were prepared and the change in conductance upon light irradiation was measured. For two DAEs, the direction of the photoswitching was opposite to show the importance of the topology of pi-conjugation.
Two-dimensional self-assembly of a 2-thienyl-type diarylethene was studied by STM at the liquid/solid interface by analyzing the concentration dependence of surface coverage. It was revealed that the assembling process of this compound was highly cooperative. By using high cooperative system, high sensitive photochemical control of the assembly was also demonstrated.

Free Research Field

物理有機化学

Academic Significance and Societal Importance of the Research Achievements

スイッチング分子の分子スケールナノサイエンスにおいて、超分子光化学の視点から独自の視点での研究を展開した。金微粒子と分子のネットワーク構造を流れる電流におけるπ共役のつながり方の重要性および２次元界面での配列形成における協同性と分子構造の関係を示すことができた。一連の研究成果は、新聞報道、webサイト報道、雑誌の表紙掲載、各種受賞、招待講演等によって社会に対して発信した。