Synthesis and Development of White Fluorescent Polymer Illuminant bearing Photoresponsive Switching Function

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K13706
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Polymer chemistry
• Research Institution: Kyoto University
• Principal Investigator: AKAGI KAZUO 京都大学, 工学研究科, 教授 (20150964)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 芳香族共役ポリマー / 白色発光 / 七色発光 / 光応答性 / ジチエニルエテン / 光スイッチング / ナノ粒子

Outline of Final Research Achievements

We constructed photochemically fluorescent colour-tuneable systems consisting of photoresponsive conjugated polymer nanospheres. Potoresponsive conjugated polymers with red, green, and blue fluorescence were synthesized by introducing photoisomeric dithienylethene moieties in the side chains. A mixture of the red-, green-, and blue-fluorescent polymer nanospheres exhibited photoswitchable white fluorescence between emission and quenching by irradiating external lights in both the nanosphere solution and film state. In addition, reversible change in fluorescent colour between white and RGB was achieved by replacing a photoresponsive polymer with a non-photoresponsive analogue in the mixture. Thus, we demonstrated “photoresponsive polymer illuminant” systems bearing photochemically colour-tuneable white fluorescence.

Free Research Field

導電性、発光性あるいは液晶性を有する共役系高分子の合成、形態制御および機能発現