| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
A cationic π-conjugated polymer is synthesized by introducing tetraalkylammonium groups onto both side chains of poly(para-phenylene) (PPP). An anionic axially chiral binaphthyl derivative (BNP) is also synthesized by introducing two anionic sulfonate groups onto the 2 and 2’positions of the binaphthyl ring. PPP and BNP form a hierarchically self-organized assembly with an interchain helically π-stacked structure stabilized by both electrostatic and π-π interactions. The assembly shows large dissymmetry factors on the order of 0.1 in the absorption and luminescence spectra, even in solution. The assembly forms spheres with an average size of 220 nm and the spheres show a Maltese Cross and extinction rings in the polarized optical microscope. Furthermore, the spheres exhibit a circularly polarized blue luminescence. It is thus demonstrated that the spheres are semicrystalline spherulites constructed from helically π-stacked assemblies of PPP-BNP.
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