| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
We developed naphthalene oligomer-based dyes showing circularly polarized luminescence (CPL). Methylenedioxy-bridged naphthalene octamers and peri-xanthenoxanthenes displayed intense CPL. Naphthalene tetramers possessing six fluorophores displayed excimer-CPL. Pyrenes sandwiched by binaphthyls exhibited solvent-dependent inversion of the sign of CPL. A binaphthyl-bipyridyl cyclic dyad exhibited ON/OFF properties in CPL by protonation/deprotonation. The systematic study allowed us to find an empirical rule called the excimer chirality rule: right- and left-handed excimers exhibit (+)- and (-)-CPL, respectively. These dyes, methods, and rules will contribute greatly to the further development and application of CPL dyes.
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