| Budget Amount *help |
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2013: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Fiscal Year 2012: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
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| Outline of Final Research Achievements |
In this project, the following scientific achievements were obtained. A new photo-stabilization method of acene derivatives utilizing stable radical was discovered. Thus, a combination of two unstable species (photo-reactive pentacene and radical) led to remarkable photo-stability enhancement and the solubility enhancement in organic solvents. To clarify the mechanism of the photo-stability enhancement, excited-state dynamics of the pentacene derivatives having stable radical substituents were investigated by using the transient absorption measurements. The derivatives showed ultrafast formation of triplet excited state in the pentacene moiety from photoexcited singlet state owing to the contributions of enhanced intersystem crossing and singlet fission.
In addition, we also obtained some new results concerned with the excited-state spin dynamics of radicals. Furthermore, the magnetic and optical properties of Co complexes with radical ligands were also investigated.
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